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  • 1980-1984  (969)
  • 1983  (969)
  • Analytical Chemistry and Spectroscopy  (803)
  • Rat  (144)
  • Gas chromatography
  • Nuclear reactions
Source
Material
Years
  • 1980-1984  (969)
Year
Keywords
  • 101
    Electronic Resource
    Electronic Resource
    Autoradiographical studies on the localization of metallothionein in proximal tubular cells of the rat kidney (1983)
    Springer
    Archives of toxicology 53 (1983), S. 185-192 
    Details
    ISSN: 1432-0738
    Keywords: 109Cd-Metallothionein ; 125I-Metallothionein ; Rat ; Kidney ; Light microscopical autoradiography ; Electron microscopical autoradiography
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The renal distribution of 125I-labelled metallothionein (125I-MT), administered as a tracer dose to female Wistar rats, has been investigated by light and electron microscopical autoradiography. 125I-MT was absorbed rapidly and 80% of the administered dose was observed in the kidney within 60 min after dosing. At 30 min, a high density of silver grains due to 125I, was observed by light microscopy in the convoluted proximal tubules. Electron microscopical autoradiography showed that silver grains were located in large apical vacuoles and cytoplasmic bodies (heterolysosomes) of the endocytotic system in the apical or middle regions of the cells lining convoluted proximal tubules. The results suggest that endocytotic systems are associated with 125I-MT absorption by epithelial cells lining the renal convoluted proximal tubules. The apparent inconsistency on the distribution pattern of silver grains due to 109Cd-labelled MT and 125I-labelled MT in these is also discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00316502
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  • 102
    Electronic Resource
    Electronic Resource
    Adrenocortical response to single and repeated doses of chloroform in rats (1983)
    Springer
    Archives of toxicology 54 (1983), S. 145-156 
    Details
    ISSN: 1432-0738
    Keywords: Rat ; Adrenal cortex hypertrophy ; Chloroform ; Cholesterol ; Corticosterone secretion and metabolism
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The influence of single and repeated doses of chloroform on the adrenocortical function was studied in young male albino rats. One day after oral administration of a single dose of 1.5 g chloroform/kg body weight, adrenal hypertrophy developed and persisted for at least 12 days. The adrenal cholesterol content started to drop 3 h after the application, remained low for 1 day, then increased and remained elevated during the next 12 days. The plasma corticosterone content increased 15 min after the treatment and remained high during the next 4 h; 6 h after the treatment, when the anesthetic effects of CHCl3 had disappeared, it decreased somewhat; after 12 h it increased again, and the peak value was observed after 1 day. This was followed by a gradual drop, and after 8 days it reached the normal level. A second dose, administered 4 or 8 days after the first one, was still capable of stimulating the adrenocortical function. This was evidenced 24 and 48 h after the second dose. The response, however, was smaller than that observed after a single dose of the same Stressor. The influence of a single dose of chloroform on corticosterone decay in the circulation 1 and 9 days after treatment, was tested in adrenalectomized rats injected with non-radioactive corticosterone, and in intact rats injected with 1,2-3H-corticosterone. Results for the adrenalectomized animals were inconclusive, whereas those for the intact ones proved that the treated animals metabolized corticosterone as well as the controls did.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01261383
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  • 103
    Electronic Resource
    Electronic Resource
    Increase of δ-Aminolevulinic Acid Dehydratase (ALAD) in rat erythrocytes in lead poisoning (1983)
    Springer
    Archives of toxicology 52 (1983), S. 1-11 
    Details
    ISSN: 1432-0738
    Keywords: Lead poisoning ; Erythrocytes ; δ-Aminolevulinic acid dehydratase(ALAD) ; Rat ; Porphyrins
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The well known fact that the activity of δ-aminolevulinic acid dehydratase (ALAD: EC 4.2.1.24) is reduced in red cells of animals with lead poisoning was found to be upset, by using a modified method of Gibson's original procedure, for determination of activated ALAD activity. The modified method involves addition of 0.2 mM Zn2+ and then preheating the enzyme solution at 60° C for 5 min before following Gibson's original procedure. With this methodological modification, the ALAD activity of erythrocytes of rats poisoned with lead was found increased. Furthermore, the enzyme was purified from the peripheral blood of lead-poisoned rats. ALAD protein in peripheral blood was also determined by single radial immuno diffusion using rabbit anti-serum raised against rat liver ALAD. As the result, the ALAD activity obtained from the modified method was found to be directly proportional to the absolute amount of enzyme proteins determined both by chemically and immunochemically. The modified method for measuring true ALAD content in blood cells in lead poisoning is more reliable than previous ones.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00317977
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  • 104
    Electronic Resource
    Electronic Resource
    Effects of manganese ions on thyroid function in rat (1983)
    Springer
    Archives of toxicology 54 (1983), S. 243-246 
    Details
    ISSN: 1432-0738
    Keywords: Manganese ; Thyroid hormones ; Thyroid ; Serum ; Rat
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Rats were treated with MnSO4, H2O (1 mg/100 g/day, SC) for a period of 5 weeks. Thyroxine (T4) and triiodothyronine (T3) levels were measured in thyroid by radioimmunoassay. T4, T3 and thyroid-stimulating hormone (TSH) levels were also estimated by radioimmunoassay in serum. Manganese treatment produced no change in thyroid T4 and T3 levels but induced a significant decrease in serum T4, T3 and TSH levels. This decrease can be interpreted as the result of a pituitary alteration which appears to be related to the high accumulation of manganese in the pituitary gland.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01239208
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  • 105
    Electronic Resource
    Electronic Resource
    Effects of oral, subchronic cadmium administration on fertility, prenatal and postnatal progeny development in rats (1983)
    Springer
    Archives of toxicology 54 (1983), S. 297-302 
    Details
    ISSN: 1432-0738
    Keywords: Cadmium ; Prenatal toxicity ; Behavioral deficit ; Rat
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Cadmium chloride was administered by gavage to female rats 5 days a week for 5 weeks, then during mating and gestation periods at doses of 0.04, 0.4, and 4 mg Cd/kg/day. Treatment with cadmium neither affected the survival and fertility of females, nor produced overt fetotoxic effects. Fetal cadmium concentration was not related to the level of exposure. Litter size, body weight gain and viability of offspring during 2 months after parturition were similar in all groups. The exploratory locomotor activity of 2-month-old males and females born to rats given 0.4 and 4 mg Cd/kg/day was significantly reduced. The progeny of cadmium-treated females showed decreased performance in the rotarod test. In general, the degree of behavioral impairment was dose-related.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01234482
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  • 106
    Electronic Resource
    Electronic Resource
    Fate and specific tissue retention of toxaphene in mice (1983)
    Springer
    Archives of toxicology 54 (1983), S. 311-321 
    Details
    ISSN: 1432-0738
    Keywords: Toxaphene ; Distribution ; Mice ; Autoradiography ; Gas chromatography
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Series of female virgin and pregnant albino mice were i.v. injected with14C-labelled- or unlabelled toxaphene (16 mg/kg b.w.). After survival times ranging from 1 min to 32 days the toxaphene distribution in the body was studied using whole-body autoradiography and capillary gas-chromatography. Autoradiographic studies have shown that after an initial accumulation in the liver, brown fat, lung, brain, kidney, and ovaria (corpora lutea) there was a gradual redistribution of radioactivity to the white fat within 4 h postinjection. The labelling was then decreasing rapidly and only negligible amounts of the radioactivity were present in the adipose tissue after 32 days. In the fetus only the liver and adrenals showed a distinct labelling. A specific and persistent accumulation of the label was detected in some zones of the adrenal cortex suggesting a possible direct interference of toxaphene with adrenal steroid hormone synthesis. The gas chromatographic pattern of toxaphene-derived residues in the tissue samples resembled that of the technical toxaphene, but was changing in different tissues with the time. The liver chromatograms indicated more extensive formation of metabolites.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01234484
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  • 107
    Electronic Resource
    Electronic Resource
    Preputial tumors induced by intragastric intubations of 7,12-dimethylbenz(a)anthracene in gonadectomized female and male rats (1983)
    Springer
    Journal of cancer research and clinical oncology 105 (1983), S. 299-302 
    Details
    ISSN: 1432-1335
    Keywords: Preputial gland ; 7,12-Dimethylbenz(a)anthracene ; Rat
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary A series of administrations of 7,12-dimethylbenz(a)anthracene given at biweekly intervals by gastric intubation to gonadectomized rats of the Sprague-Dawley strain elicited a considerable number of preputial tumors. The tumors commonly consisted of solid and cystic parts with a wide variety of histologic features and were classified as adenomas, carcinomas, and malignant mixed tumors.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00395762
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  • 108
    Electronic Resource
    Electronic Resource
    The effect of attenuated vaccinia virus AS strain on N-methyl-N′-nitro-N-nitrosoguanidine-induced gastric cancer in rats (1983)
    Springer
    Journal of cancer research and clinical oncology 105 (1983), S. 117-126 
    Details
    ISSN: 1432-1335
    Keywords: Attentuated vaccinia virus AS strain ; N-Methyl-N′-Nitro-N-Nitrosoguanidine ; Stomach cancer ; Rat
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The effect of vaccinia virus on MNNG-induced gastric cancer in rats was studied. Subcutaneous inoculation of the highly attenuated vaccinia virus AS strain at intervals of 3 days from the beginning of the experiment showed prominent antitumor activity not only against adenocarcinoma induced by MNNG in the glandular stomach but also against squamous cell carcinoma in the forestomach. Both UV-inactivated vaccinia virus and the DI strain of mammalian pathogenic vaccinia virus, from which the AS strain originated, showed no antitumor effect.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00406921
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  • 109
    Electronic Resource
    Electronic Resource
    Characterization of the stimulus-response curve for hypoxic pulmonary vasoconstriction (1983)
    Springer
    Pflügers Archiv 398 (1983), S. 93-95 
    Details
    ISSN: 1432-2013
    Keywords: Pulmonary circulation ; Hypoxia ; Rat
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Lungs from seven healthy female, sea level rats were perfused and ventilated in vitro. Hypoxic pulmonary vasoconstriction was stimulated by changing the inspired gas from 21% oxygen to 6, 4, 3 or 0% oxygen (all gases contained 5% carbon dioxide and balance nitrogen). A sigmoid stimulus-response curve was derived by probit analysis with a 50% of maximum response (ED50) at an oxygen tension of 3.49±0.17 kPa. It is suggested that such characterizations of the response to hypoxia may allow a more precise comparison of the effects of species, age, sex and drugs on hypoxic pulmonary vasoconstriction.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00581054
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  • 110
    Electronic Resource
    Electronic Resource
    Adrenoceptor-mediated effects of optically active catecholimidazolines in pithed rat (1983)
    Springer
    Naunyn-Schmiedeberg's archives of pharmacology 323 (1983), S. 221-227 
    Details
    ISSN: 1432-1912
    Keywords: Stereoisomers ; Enantiomers ; Imidazolines ; Rat ; pithed ; Adrenoceptors
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Adrenoceptor-mediated effects of the enantiomers of the optically active imidazoline, 2-(3,4,α-trihydroxybenzyl)imidazoline, and the corresponding desoxy derivative, 2-(3,4-dihydroxybenzyl)imidazoline, have been investigated in the pithed rat. The enantiomers and desoxy derivative were potent pressor agents with a direct action mediated predominantly via postsynaptic vascular α2-adrenoceptor. These compounds were significantly less potent at presynaptic α2-adrenoceptor in rat heart. The rank order of potency for the two enantiomers and desoxy derivative at postsynaptic vascular α1- and presynaptic cardiac α2-adrenoceptor in pithed rat were: desoxy≥R(−) 〉(+), consistent with our previous findings in vitro. This order of potency is not in agreement with the rank order of R(−)〉S(+)=desoxy which is predicted by the Easson-Stedman Hypothesis. The β-adrenoceptor-mediated chronotropic and β-adrenoceptor-mediated vasodepressor effects of these imidazolines were also investigated in pithed rat and found to be weaker than either the α1- or α2-adrenoceptor-mediated effects. However, the rank order of potency of the enantiomers and corresponding desoxy derivative for β1- and β2-adrenoceptor-mediated effects was found to be similar to that order predicted by the Easson-Stedman Hypothesis. Studies with these optically active imidazoline enantiomers and corresponding desoxy derivativative indicate that quantitative as well as qualitative differences exist in the stereochemical requirements of α- and β-adrenoceptor. The results also support our previous observations which suggest that phenethylamines and imidazolines may interact differently with α-adrenoceptor since the former adhere strictly to the Easson-Stedman Hypothesis whereas the latter do not.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00497667
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  • 111
    Electronic Resource
    Electronic Resource
    Properties of a 125I-substance P derivative binding to synaptosomes from various brain structures and the spinal cord of the rat (1983)
    Springer
    Naunyn-Schmiedeberg's archives of pharmacology 324 (1983), S. 134-139 
    Details
    ISSN: 1432-1912
    Keywords: Substance P receptors ; 125I-BHSP binding ; Synaptosomes ; Brain structures ; Spinal cord ; Rat
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Using crude synaptosomal fractions (P2 fractions) and 125I-Bolton and Hunter substance P (125I-BHSP) as a ligand, the characteristics of specific binding sites were examined in various brain structures and in the spinal cord (dorsal and ventral parts) of the rat. Scatchard plots revealed the occurrence of a single class of binding sites in the various structures studied with comparable K d values (from 0.46 to 1.10 nmol/l in the brain and 0.51, 0.56 nmol/l in the spinal cord dorsal and ventral parts respectively) and of marked differences in the number of binding sites (Bmax) (septum 〉 striatum 〉 hippocampus, hypothalamus 〉 mesencephalon 〉 cerebral cortex and dorsal part of the spinal cord 〉 ventral part). In the brain no correlation was found between the number of 125I-BHSP binding sites and the amount of substance P levels (substance P-like immunoreactivity) in synaptosomes, particularly in the hippocampus and the substantia nigra since the former structure was characterized by its low substance P content and its high number of binding sites and the reverse was observed in the substantia nigra. The ability of several C- and N-terminal fragments of substance P and of tachykinins to compete with 125I-BHSP binding to synaptosomes from the hippocampus, the hypothalamus and the dorsal part of the spinal cord was then determined. Results obtained were closely similar from one structure to another and comparable to those previously reported using whole brain synaptosomes. Although the presence of various types of central substance P receptors cannot be excluded, the present results indicate that only one class of sites can be demonstrated using 125I-BHSP as a ligand.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00497019
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  • 112
    Electronic Resource
    Electronic Resource
    Beta-adrenoceptors in the rat kidney (1983)
    Springer
    Naunyn-Schmiedeberg's archives of pharmacology 324 (1983), S. 94-98 
    Details
    ISSN: 1432-1912
    Keywords: Rat ; Kidney ; Immunohistochemistry ; β-Blocker antibodies ; Fluorescence microscopy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The direct histochemical detection of β-blocker binding sites was studied in sections of rat kidney using an immunohistochemical technique developed in our laboratory. Frozen sections of rat kidney were incubated in a solution of (-)alprenolol, washed, exposed to fluorescent (-)alprenolol antibodies (FAA) and then observed at a fluorescence microscope. Strong fluorescence was found within the wall of renal artery and vein, but primarly in the artery. At the level of blood vessels(-)alprenolol binding sites were located chiefly in the media and in the intima. The renal glomerulus, the loop of Henle and collecting tubules appear to be free of any fluorescence. Consequently they do not have β-adrenoceptors. On the contrary, the glomerular afferent and afferent arterioles, the cellular elements of the juxtaglomerular apparatus, proximal and distal convoluted tubules, are rich in (-)alprenolol binding sites. At higher magnifications the immunoreactivity appears to be located in the basal membrane of cellular elements which indicates that (-)alprenolol binding sites are membrane receptors. The direct immunohistochemical detection of β-blocker binding sites in the kidney may offer useful information concerning the site of action of β-blockers at the level of an important target organ for this class of drugs.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00497013
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  • 113
    Electronic Resource
    Electronic Resource
    Vascular protein leakage in various tissues induced by substance P, capsaicin, bradykinin, serotonin, histamine and by antigen challenge (1983)
    Springer
    Naunyn-Schmiedeberg's archives of pharmacology 324 (1983), S. 212-218 
    Details
    ISSN: 1432-1912
    Keywords: Plasma extravasation ; Substance P ; Capsaicin ; Anaphylaxis ; Histamine ; Bradykinin ; Serotonin ; Rat ; Guinea-pig
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary 1. Plasma extravasation was induced in rats or guinea-pigs by intravenous injections of (1) substance P (SP), (2) the C-terminal SP-hexapeptide SP(6-11), (3) serotonin (5-HT), (4) histamine, (5) bradykinin, (6) capsaicin and (7) by antigen challenge. 2. Plasma extravasation induced by SP, SP(6-11), by 5-HT and by capsaicin was, with few exceptions, observed in the same tissues. The effect of SP was not blocked by H1 and H2 histamine receptor antagonists. The effect of i.v. capsaicin was absent in capsaicin desensitized animals. Plasma extravasation upon i.v. SP, SP(6-11), 5-HT and capsaicin was seen in the skin and in all organs containing mucous membranes except the intestinal mucosa. 3. Plasma extravasation by histamine, bradykinin, and antigen challenge of sensitized guinea-pigs was, in addition, also observed in the stomach and intestine. Plasma extravasation and bronchoconstriction by antigen challenge with 20μg/kg ovalbumin was completely blocked by combined H1 and H2 histamine receptor blockade. Both responses were reduced to about the half capsaicin desensitized guinea-pigs, although the reduction of the permeability response was statistically not significant in all organs. 4. In conclusion, several substances including anaphylaxis induce protein leakage in many tissues with differing selective distribution patterns. Anaphylactic histamine release leads to protein leakage partly via activation of sensory neurons. SP is a likely mediator of neurogenic protein leakage in many organs.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00503897
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  • 114
    Electronic Resource
    Electronic Resource
    Morphometric investigations into the mechanism of the compensatory hypertrophy of the rat adrenal zona fasciculata after unilateral adrenalectomy (1983)
    Springer
    Cell & tissue research 234 (1983), S. 573-578 
    Details
    ISSN: 1432-0878
    Keywords: Adrenalectomy ; Hypophysectomy ; Compensatory adrenal growth ; Rat ; Stereology
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Compensatory hypertrophy of the remaining gland in unilaterally adrenalectomized rats was investigated by morphometric techniques. It was observed that compensatory adrenal growth occurred in both dexamethasone-treated and hypophysectomized rats, receiving maintenance doses of ACTH. However, it was only half that found in intact animals. These results support the view that activation of the hypothalamo-hypophyseal axis is not the unique mechanism underlying adrenal compensatory hypertrophy in the rat.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00218652
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  • 115
    Electronic Resource
    Electronic Resource
    Distribution and morphological characteristics of the pit cells in the liver of the rat (1983)
    Springer
    Cell & tissue research 233 (1983), S. 485-505 
    Details
    ISSN: 1432-0878
    Keywords: Liver ; Pit cell ; Cytoplasmic granules ; Vesicles ; Rat
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Pit cells, on which almost no further contributions have been presented since the first report by Wisse et al. (1976), are described in detail in the rat liver. These cells show several characteristic features: 1) “rod-cored vesicles”, a new type of vesicular inclusion observed first in our study; 2) electron-dense granules, which we consider to arise from multivesicular bodies by the accumulation of dense material; and 3) well-developed pseudopodia. Although these features clearly differentiate pit cells from conventional lymphocytes, these two cell types display similarities (i) in a number of ultrastructural features, (ii) in the pattern of their intralobular distribution, and (iii) in their presence in the spleen and peripheral blood.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00212219
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  • 116
    Electronic Resource
    Electronic Resource
    Bone morphology of weanling rats from dams subjected to fluoride (1983)
    Springer
    Cell & tissue research 233 (1983), S. 689-691 
    Details
    ISSN: 1432-0878
    Keywords: Fluoride ; Progeny ; Bone ; Rat
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Femurs of weanling rats from third-pregnancy litters of dams given 150 ppm fluoride in the drinking water were examined by light- and scanning-electron microscopy. Under the conditions of the experimental procedure, no pathological changes were seen in the femurs as a result of maternal ingestion of fluoride. These results indicate that the amount of fluoride crossing the placenta and mammary gland was insufficient to produce significant morphological changes in the bones of 3-week-old rats.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00212235
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  • 117
    Electronic Resource
    Electronic Resource
    Ultrastructural characteristics of vasopressin-containing neurons in the paraventricular nucleus of the hypothalamus (1983)
    Springer
    Cell & tissue research 234 (1983), S. 125-134 
    Details
    ISSN: 1432-0878
    Keywords: Vasopressin ; Immunocytochemistry ; Electron microscopy ; Hypothalamus ; Rat
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Vasopressin-containing neurons, identified by immunocytochemistry, are located predominantly in the posterior magnocellular division of the paraventricular nucleus of the rat hypothalamus. By electron microscopy, the immunoreaction product is seen within the cell bodies and neuronal processes. In the perikarya and dendritic processes, the immunoreactive material is associated primarily with neurosecretory granules. Axonal processes, identified by their content of microtubules and accumulation of neurosecretory granules, show the immunoreaction product in association with both of these organelles. Afferent axo-dendritic, axo-somatic and putative axo-axonic synapses with immunostained vasopressinergic neurons can be identified. The presynaptic profiles do not contain immunoreactive material. This study contributes to the ultrastructural characterization of vasopressinergic neurons in the paraventricular nucleus and of their afferent synaptic input.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00217406
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  • 118
    Electronic Resource
    Electronic Resource
    Light- and electron-microscopic study on the maturation of the primary portal plexus during the perinatal period in rats (1983)
    Springer
    Cell & tissue research 234 (1983), S. 179-191 
    Details
    ISSN: 1432-0878
    Keywords: Hypothalamo-hypophysial system ; Capillaries ; Ontogenesis ; Rat
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The maturation of the capillaries of the primary portal plexus in rats during the perinatal period has been studied lightand electronmicroscopically. The number of capillaries covering the median eminence and of those invading the nervous tissue (capillary loops) increases significantly with age. Capillary loops were observed as early as the 18th fetal day. The mitotic divisions of the endothelial cells within the preexisting capillaries seem to be the main reason for the vascular growth. Immature capillaries with a characteristic narrow lumen are surrounded by a fuzzy basal lamina; their wall is formed by a generally expanded endothelium with rather sparse organelles and inclusions, and by minute flattened areas. The maturation of the capillary results in a progressive spread of flattened endothelium followed by an enlargment of the capillary lumen. Moreover, a rising concentration of organelles and inclusions, relatively numerous luminal microvilli, and a dense and uniform basal lamina become noticeable as capillary differentiation proceeds. These data are thought to reflect the progressive increase in the metabolic activity of the endothelium as well as the establishment of capillary patency during the perinatal period of rats.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00217411
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  • 119
    Electronic Resource
    Electronic Resource
    Gas and high-performance liquid chromatography of phenols (1983)
    Springer
    Chromatographia 17 (1983), S. 269-284 
    Details
    ISSN: 1612-1112
    Keywords: Gas chromatography ; Liquid chromatography ; Phenols
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary Gas and high-performance liquid chromatographic methods in the analysis of phenols are reviewed. Among the great number of phenolic compounds analyzed, alkylphenols, chlorophenols, dihydroxy- and trihydroxybenzenes and biphenols are chiefly considered. The advantages and drawbacks of the methods are discussed, quoting the most important work. Relationships between the structural characteristics of phenols, the stationary phase structure, the mobile phase composition and the retention data are treated. Typical examples of the conditions for GC and HPLC analysis are summarized in tables. The literature comprises over 270 references, most of them recent.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02263039
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  • 120
    Electronic Resource
    Electronic Resource
    Relationship between the average molecular polarizabilities of polycyclic aromatic hydrocarbons and their retention indices determined on various stationary phases (1983)
    Springer
    Chromatographia 17 (1983), S. 300-302 
    Details
    ISSN: 1612-1112
    Keywords: Gas chromatography ; Average molecular polarizability ; Retention index ; Polycyclic aromatic hydrocarbons
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The Kováts retention indices of 10 polycyclic aromatic hydrocarbons were determined on SE-30, OV-101, SE-52, OV-7 and OV-17 stationary phases. A significant correlation has been found between the retention indices and the average molecular polarizabilities of the analyzed substances. Equations were derived for the direct determination of the average molecular polarizabilities from the retention index values. The influence of the temperature on this relationship is also indicated.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02270661
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  • 121
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    Electronic Resource
    Gas chromatographic analysis of C1–C20 carboxylic acids esterified in aqueous solutions as isobutyl esters (1983)
    Springer
    Chromatographia 17 (1983), S. 493-500 
    Details
    ISSN: 1612-1112
    Keywords: Esterification in aqueous solution ; iso butyl esters of C1–C20 fatty acids ; Gas chromatography ; Fatty acid analysis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary C1–C20 carboxylic acids have been esterified in aqueous solutions with i-butanol. Gas chromatographic analyses have been performed from a single chromatogram. It has been established that esterification in the concentration range of [H2O]/[i-BuOH]=0.01–10.3 can be utilized for the quantitative determination of these carboxylic acids. The presence of water does not interfere in the range of [H2O]/[i-BuOH]=0.01–1.03. In the cases of [H2O]/[i-BuOH]〉1.03, anhydrous sodium sulfate has been used for binding the water, in an amount of [Na2SO4]anh./[H2O]≥0.2.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02263272
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    Degeneration of cochlear neurons after amikacin intoxication in the rat (1983)
    Springer
    European archives of oto-rhino-laryngology and head & neck 237 (1983), S. 201-208 
    Details
    ISSN: 1434-4726
    Keywords: Amikacin intoxication ; Cochlea ; Spiral ganglion ; Neuronal degeneration ; Rat
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Intoxication with high doses of the aminoglycoside antibiotic amikacin in a supranormal sensitive period in the rat induces complete destruction of the inner and outer hair cells in the organ of Corti in all turns, whereas the supporting cells remain partially preserved in the upper turns. With increasing survival time, the number of ganglion cells in the spiral ganglion decreases progressively, reaching a minimum of about 10% surviving cells after 12 months. Both type I and type II neurons are subject to retrograde degeneration, although type-II cells degenerate more slowly than type-I cells. The presence or absence of supporting cells in the organ of Corti does not seem to influence neuronal degeneration. This retrograde degeneration is similar in all animals so far studied but its time course is different for different species. Retrograde degeneration after destruction of Corti's organ is a long-lasting process and is never completed at once. This must be taken into consideration in the treatment of total deafness with electric stimulation of surviving neurons.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00453725
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  • 123
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    Ultrastructure of the endometrial blood vessels during implantation of the rat blastocyst (1983)
    Springer
    Cell & tissue research 229 (1983), S. 269-280 
    Details
    ISSN: 1432-0878
    Keywords: Uterus ; Implantation ; Blood vessels ; Rat
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The ultrastructure of the blood vessels of the endometrium was analysed during implantation of the blastocyst in rats, at the time of appearance of the Pontamine Blue Reaction. Vessels from implantation sites and from interimplantation sites were compared. In vessels from implantation sites the endothelial cells showed fenestrations covered by diaphragms. In addition, small interruptions (gaps) between the endothelial cells were observed. These features were present in vessels larger than 5 μm in diameter and more than 100 μm away from the uterine epithelium, both in the mesometrial and antimesometrial wall of the endometrium. Vessels from interimplantation sites displayed neither fenestrations nor interruptions. The endothelial cells of the implantation sites displayed morphological signs of metabolic activation. These consisted of increased numbers of polyribosomes, well developed Golgi complexes and prominent nucleoli. The fenestrations and gaps in the vessel wall were interpreted as constituting the morphological basis for the increase in vascular permeability and the consequent edema which characterize the Pontamine Blue Reaction.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00214975
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  • 124
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    Differences in the distributional pattern of CRF-, oxytocin-, and vasopressin-immunoreactive nerve fibers in the median eminence of the rat (1983)
    Springer
    Cell & tissue research 230 (1983), S. 247-258 
    Details
    ISSN: 1432-0878
    Keywords: CRF ; Oxytocin ; Vasopressin ; Immunohistochemistry ; Median eminence ; Rat
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Conspicuous differences in the distributional pattern of nerve fibers containing corticotropin-releasing factor (CRF) or posterior lobe hormones, respectively, were shown in the median eminence of the adult male rat by means of immunoperoxidase histochemistry, with the use of anti-CRF, anti-oxytocin, and anti-vasopressin sera. In the rostral and central divisions of the median eminence, a high concentration of CRF-immunoreactive nerve fibers was found in the median portion of the external layer; these fibers terminated on the capillary loops of the hypophysial portal system. In the caudal division of the median eminence, the CRF-immunoreactive nerve fibers were located in the median to paramedian portions of the external layer. Numerous oxytocin- and vasopressin-immunoreactive nerve fibers were observed evenly distributed throughout the internal layer of the median eminence. In the external layer, a small number of the oxytocin- and vasopressin-containing nerve fibers was found around the capillary loops, particularly in the median to paramedian portions. The distributional patterns of the CRF and the posterior lobe hormones in the hypothalamo-hypophysial system and their functional interrelationship are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00213803
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    Ultrastructural changes rapidly induced by somatostatin may inhibit prolactin release in estrogen-primed rat adenohypophysis (1983)
    Springer
    Cell & tissue research 232 (1983), S. 21-34 
    Details
    ISSN: 1432-0878
    Keywords: Prolactin ; Somatostatin ; Estrogen priming ; Adenohypophysis ; Rat
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Apart from the known hypothalamic controls, which have been well documented, a myriad of compounds both endogenous and exogenous have proved effective in influencing secretion of prolactin (PRL). Recent studies have shown that somatostatin (SRIF), when injected intra-atrially as a bolus, is able to inhibit PRL secretion in vivo. However, the inhibitory effect of SRIF occurs only in adenohypophyses previously primed with estradiol. This research was undertaken to examine the ultrastructural effects of that inhibition using male Sprague-Dawley rats primed for three weeks with subcutaneous implants of estradiol. Within 2 min of injection of SRIF (1 mg/kg), the adenohypophyses were removed and processed for electron microscopy. We found dramatic changes in the estradiol-primed mammotrophs, including 1) an apparent rearrangement of rough endoplasmic reticulum (RER) into concentric cisternae, and 2) the appearance of intracellular bodies closely associated with granules. These changes were not observed in non-estradiolprimed male rats injected with SRIF which is consistent with the fact that in the normal male rats, SRIF failed to inhibit PRL secretion. These findings suggest that SRIF causes reorganization of cellular organelles so that PRL granules are sequestered thereby inhibiting secretion of PRL.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00222371
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    Regeneration of splenic tissue after autologous subcutaneous implantation: Homing of T- and B- and Ia-positive cells in the white pulp of the rat spleen (1983)
    Springer
    Cell & tissue research 229 (1983), S. 97-107 
    Details
    ISSN: 1432-0878
    Keywords: Splenic implants ; Immunoperoxidase technique ; Lymphocyte homing ; Interdigitating cells ; Rat
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The localization of T-and B lymphocytes and interdigitating cells (IDC) was investigated during the regeneration process of splenic implants. For this purpose a two-step immunoperoxidase technique was used to visualize T-cell antigen, immunoglobulins and Ia-antigen on cryostat sections. The specific localization of the repopulating lymphocytes occurred simultaneously with the development of non-lymphoid elements characteristic for the different compartments of the white pulp, i.e., the periarteriolar lymphocyte sheaths (PALS) and follicles. The marginal zone (MZ) developed after the PALS and primary follicles, but before germinal center reactions were found. During ontogeny, however, the development of a broad MZ precedes the formation of follicles. This difference in sequence of events is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00217883
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    Extracellular matrix vesicles in rat bone after parathyroidectomy (1983)
    Springer
    Cell & tissue research 228 (1983), S. 451-457 
    Details
    ISSN: 1432-0878
    Keywords: Bone matrix vesicles ; Parathyroid hormone ; Mineralization ; Rat
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The enzymatic activity of bone matrix vesicles from parathyroidectomized rats was determined and compared to the activity of vesicles from sham operated and normal animals. The vesicles were isolated from the alveolar bone by collagenase digestion and differential centrifugation and further purified on a discontinuous sucrose density gradient. The amount of extractable protein and the activity of alkaline phosphatase, acid phosphatase, and ATPase in the vesicle fractions thus obtained did not differ significantly from the values characteristic of preparations from control rats. It may therefore be suggested that parathyroid hormone depletion and the associated hypocalcemia have no significant effect on the occurrence and phosphatase activity of bone matrix vesicles.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00211467
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  • 128
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    Influence of melatonin on the process of protein and/or peptide secretion in the pineal gland of the rat and hamster (1983)
    Springer
    Cell & tissue research 231 (1983), S. 73-82 
    Details
    ISSN: 1432-0878
    Keywords: Pineal organ ; Melatonin ; Pineal protein secretion ; Rat ; Hamster
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The hypothesis that melatonin (aMT) is implicated in the regulation of the secretory process involved in the synthesis and release of protein/peptide “hormones” of the pineal organ has been tested in the present study by the use of an in vitro system in two mammalian species. In these species the secretory process studied is characterized by either large (hamster) or very small (rat) numbers of granular vesicles. In both species, aMT clearly participates in the regulation of the process of protein/peptide secretion. However, the effect of aMT varies with the presence of noradrenaline (NA) in the medium and is not identical in both species. Melatonin, in the absence of NA, induces the formation of granular vesicles by the Golgi apparatus in pinealocytes of the rat but not in those of the hamster, while in the presence of NA, aMT provokes a decrease in the number of these vesicles in both species. The present experiments show (i) that the pineal is one of the target organs for aMT, and (ii) that aMT is implicated in the control of protein/ peptide secretion in the pineal organ.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00215775
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    Pituitary folliculo-stellate cells immunostained with S-100 protein antiserum in postnatal, castrated and thyroidectomized rats (1983)
    Springer
    Cell & tissue research 231 (1983), S. 235-249 
    Details
    ISSN: 1432-0878
    Keywords: Pituitary gland ; S-100 protein ; Castration ; Thyroidectomy ; Postnatal development ; Immunocytochemistry ; Rat
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Pituitary folliculo-stellate cells and associated cells were studied immunohistochemically throughout the life of male and female rats. The marginal layer cells of the pars distalis and intermedia as well as the folliculo-stellate cells were immunostained with anti-S 100 protein serum. The immunostained folliculo-stellate cells in one section were identified as themselves by their ultrastructural properties on the adjacent section. Corticotrophs, thyrotrophs and prolactin cells, characterized by the stellate shape, were not immunostained with anti-S 100 protein serum. Reactivity for S-100 protein appeared on postnatal Day 6 in the marginal layer cells of the pars intermedia, and appeared on Day 10 in those cells of the pars distalis. No immunostained folliculostellate cells appeared before Day 6, but a few of them appeared on Day 10. Thereafter they increased in number, having more intense immunostaining with advancing age. In castrated rats, the immunostained folliculo-stellate cells appeared quite numerously, with branched cytoplasmic processes surrounding the gonadotrophs. In the thyroidectomized rats, however, folliculo-stellate cells lacked ramified cytoplasmic processes, and their topographic affinity for thyrotrophs was negligible.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00222177
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    Improved demonstration of exocytotic profiles in glomus cells of rat carotid body after perfusion with glutaraldehyde fixative containing a high concentration of potassium (1983)
    Springer
    Cell & tissue research 229 (1983), S. 627-637 
    Details
    ISSN: 1432-0878
    Keywords: Carotid body ; Rat ; Glomus cells ; Exocytosis ; High ; K fixation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Extensive secretion by exocytosis was demonstrated in the glomus (type I) cells of the adult rat after perfusion of carotid bodies with a potassium-rich (high K) glutaraldehyde fixative. Similar secretory profiles were very rare with a glutaraldehyde fixative containing a low concentration of potassium (low K). The increase in the incidence of exocytotic profiles in glomus cells with the high K fixative was highly significant, whereas no statistical difference could be observed in the incidence of coated pits with the different fixatives. Exocytotic profiles were characterized by the following features: (1) they predominated in non-synaptic regions, but were occasionally observed near synapses between two glomus cells; they were not observed near synapses between glomus cells and nerve terminals; (2) extruded electron-dense material associated with coating of the cell membrane was frequent; (3) different stages of dissolution of the extruded granule material was evident. The possible role of exocytosis as a mode of secretion in the glomus cells and the characteristics of the new high K-glutaraldehyde fixative are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00207702
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    Immunohistochemical identification of neurons containing corticotropin-releasing factor in the rat hypothalamus (1983)
    Springer
    Cell & tissue research 230 (1983), S. 239-246 
    Details
    ISSN: 1432-0878
    Keywords: CRF neurons ; Hypothalamus ; Immunohistochemistry ; PAP ; Rat
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary A specific rabbit anti-CRF serum and the immunoperoxidase technique were used to show that CRF-containing neurons are mainly distributed in the paraventricular and supraoptic nuclei of the rat hypothalamus. In addition, immunoreactive neurons are scattered in other hypothalamic regions. These neurons are 20–30 μm in diameter. From the present and previous investigations it may be concluded that the hypothalamic magnocellular nuclei, i.e., paraventricular and supraoptic, and other hypothalamic accessory nuclei, are the producing sites not only for vasopressin and oxytocin, but also for corticotropin-releasing factor.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00213802
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  • 132
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    6-OHDA-induced ectopia of external granule cells in the subarachnoid space covering the cerebellum (1983)
    Springer
    Cell & tissue research 230 (1983), S. 309-336 
    Details
    ISSN: 1432-0878
    Keywords: Neural ectopia ; Cerebellum ; Granule cells ; Development ; 6-Hydroxydopamine ; Rat
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The present report describes the genesis, development and topographical distribution of ectopic cells of the external granular layer in the subarachnoid space covering the rat cerebellum. Following one intracisternal injection to newborn rats of 100 μg 6-hydroxydopamine (6-OHDA), the meningeal cells degenerate and are removed by phagocytosis within 24 h post injection (p.i.), leaving the cerebellar cortex without a pia-arachnoid cover. Defects appear in the basal lamina investing the cerebellar cortex 3 to 5 days p.i., and both external granule cells and ‘sprouts’ from Bergmann-glia endfeet grow into the subarachnoid space. The latter form large, flat glial lamellae and cover extensive areas of the denuded cerebellar surface, although they do not form a glial scar over the exposed neuropil of the cerebellar cortex. The numbers of ectopic external granule cells increase within the subarachnoid space both by proliferation and a continuous efflux of cells from the cerebellar cortex. They migrate, aggregate, and ultimately develop into granule, stellate and basket cells, the morphology of which is indistinguishable from their counterparts in situ; they make specific afferent and efferent connections, both among themselves and with the underlying cerebellar cortex and brainstem. The distribution of ectopic external granule cells and their derivatives is restricted to the anterior vermal fissures and the vermal-hemispheric junctions. The present results indicate that external granule cells and their derivatives are capable of both differentiating normally and surviving in the subarachnoid space if they become associated with glial cells and establish synaptic connections.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00213807
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    Evidence for protein absorption from the lumen of the seminiferous tubule and rete of the rat testis (1983)
    Springer
    Cell & tissue research 230 (1983), S. 367-375 
    Details
    ISSN: 1432-0878
    Keywords: Rat ; Testis ; Protein ; Endocytosis ; Microperfusion
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary As luminal fluid moves from the seminiferous tubule and enters the rete testis, its protein concentration declines from approximately 6 mg/ml to 1 mg/ml. It was therefore suggested that protein is either 1) utilized by the spermatozoa, 2) transported across the epithelium of the terminal segment of the seminiferous tubule, the tubuli recti or rete testis, or 3) absorbed and degraded by the epithelium. Horseradish peroxidase (HRP), a protein marker, was microperfused into single seminiferous tubules or perfused directly into the rete. After fixation, the HRP was localized histochemically and the tissue observed under the light- and electron microscope. HRP was taken up via pinocytotic vesicles into the cytoplasm of the Sertoli cells and germ cells but did not permeate extracellularly beyond the tight junctions. Similar results were obtained in the cells lining the terminal segment and the tubuli recti. The rete epithelium showed uptake of HRP into coated and noncoated vesicles, while some cells additionally revealed diffuse cytoplasmic distribution of HRP. The terminal segment, tubuli recti, and rete testis may be important routes by which proteins may leave the testicular fluid either to be degraded or to enter the blood.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00213810
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    Experimental study on the haematogenous origin of multinucleate osteoclasts in the rat (1983)
    Springer
    Cell & tissue research 233 (1983), S. 125-132 
    Details
    ISSN: 1432-0878
    Keywords: Osteoclasts, origin of ; Macrophages ; Sex chromatin (Barr body) ; Ossification ; Rat
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary When the resorption zones of the distal femoral and proximal tibial epiphyseal plates of rats are examined with the electron microscope, numerous macrophages can be seen surrounding degenerated chondrocytes. Macrophages are also found in the neighbourhood of the invading sinusoids and in close proximity to multinucleate osteoclasts. Cell fusion, however, could not be observed. Repeated transfusions of female leukocytes to isohistogeneic growing male rats caused an increase in the number of nuclei containing a Barr body in the osteoclasts of the males. The result suggests that leukocytes — of which only the monocytes come in question — are the source of multinucleate osteoclasts in endochondral ossification.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00222237
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    Ontogenetic studies on the topographical heterogeneity of somatostatin-containing neurons in rat hypothalamus (1983)
    Springer
    Cell & tissue research 233 (1983), S. 347-354 
    Details
    ISSN: 1432-0878
    Keywords: Development ; Somatostatin neuron ; Hypothalamus ; Rat
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The ontogeny of the somatostatin-containing neuron system was investigated by light-microscopic immunohistochemistry. During development, immunoreactive somatostatin-containing neurons arise from three discrete regions of the neuroepithelium of the third ventricle and show a chronological difference. The neurons are first evident within the third ventricle floor on day 12.5 of gestation; they move thereafter to the arcuate nucleus. The second generation occurs in the dorsal region of the arcuate nucleus during days 17.5–19.5; these neurons migrate sequentially into the arcuate-ventromedial nuclear region. The third generation is recognized in the neuroepithelial cell layer of the rostral hypothalamus on day 17.5 of gestation; these cells move to the periventricular area. This latter generation is most prominent during days 3–6 after birth, and some of the cells are seen sporadically even up to day 20. The first two generations give rise to the somatostatin neuron system in the arcuate-ventromedial nuclear region, while the latter gives rise to that in the rostral periventricular region in the adult rat hypothalamus.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00238301
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    Sex differences in adrenocortical structure and function (1983)
    Springer
    Cell & tissue research 232 (1983), S. 457-469 
    Details
    ISSN: 1432-0878
    Keywords: Sex differences ; Adrenal cortex ; Rat ; Maturation ; Stereology
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary This paper reports a stereological study of the cellular aspects of development of the adrenal cortex of male and female rats in the course of maturation. Rats of the Wistar strain were studied at weekly intervals from day 21 to day 77 of postnatal life. From day 42 homogenates of adrenals from female rats produced more corticosterone than homogenates from males of corresponding age. In the strain of rats studied sex differences in adrenal weight appeared at about day 49. From this day onward relative, and subsequently absolute adrenal weights were higher in females than in males. In the course of maturation the total volume of all adrenocortical zones gradually increased. From day 70 the zona glomerulosa and from day 49 the zona fasciculata were larger in female than in male rats, while no distinct sex difference was observed in the volume of the zona reticularis. The appearance of sex-related differences in the adrenal cortex depends mainly on changes in the zona fasciculata, the cells of which markedly increased in volume in female rats by comparison with males. The total number of all adrenocortical cells increased from ca 13 million on day 21 to ca 25 million on day 77 and at all intervals studied adrenal glands of male and female rats contained a similar number of parenchymal cells.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00213800
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    Multiple preparative chromatography. II. Dual-step system (1983)
    Springer
    Chromatographia 17 (1983), S. 33-36 
    Details
    ISSN: 1612-1112
    Keywords: Gas chromatography ; Preparative scale chromatography ; Capacity ; Dual-step separation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary The capacity of dual-step preparative chromatographic separation systems is considered. It is shown that dualstep separation makes it possible to enhance the capacity of preparative installations as compared with single- and dual-stage purification of the compounds.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02265106
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    Simple method for the rapid analysis of natural gas by gas chromatography (1983)
    Springer
    Chromatographia 17 (1983), S. 44-46 
    Details
    ISSN: 1612-1112
    Keywords: Gas chromatography ; Natural gas analysis ; Poropak N
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary A simple gas chromatographic method is described for the rapid analysis of natural gas using thermal conductivity detectors and programmed-temperature operation of a single Poropak N column. The method permits the determination of nitrogen, carbon dioxide and hydrocarbons containing one to seven carbon atoms.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02265109
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    Open tubular columns prepared with very thick liquid phase film I. Theoretical basis (1983)
    Springer
    Chromatographia 17 (1983), S. 553-559 
    Details
    ISSN: 1612-1112
    Keywords: Gas chromatography ; Open-tubular (capillary) columns ; Immobilized liquid phases ; Thick-film columns ; Diffusion coefficients
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The influence of the liquid phase film thickness in open-tubular (capillary) columns on the individual resistance-to-mass-transfer terms and on the overall column efficiency is examined from the theoretical point of view. Methods for the calculation of the diffusion coefficients are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02261919
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    Open tubular columns prepared with very thick liquid phase film II. Investigations on column efficiency (1983)
    Springer
    Chromatographia 17 (1983), S. 560-569 
    Details
    ISSN: 1612-1112
    Keywords: Gas chromatography ; Open-tubular (capillary) columns ; Immobilized liquid phases ; Thick-film columns ; GC-FTIR
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The performance of a column prepared with an immobilized (chemically bonded) methylsilicone phase having a film thickness of 5μm is investigated in detail. Due to their high sample capacity, such columns are particularly useful when directly coupling gas chromatography with spectroscopic techniques such as Fourier-transform infrared spectroscopy. Thick-film columns can even be used with thermal conductivity detectors.
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    URL: http://dx.doi.org/10.1007/BF02261920
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    The retention index system applied to alkylbenzenes and monosubstituted derivatives (1983)
    Springer
    Chromatographia 17 (1983), S. 600-604 
    Details
    ISSN: 1612-1112
    Keywords: Gas chromatography ; Retention index ; Alkyl benzenes
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary The additivity concept in the retention index system of Kovats has been examined for a series ofn-alkylbenzenes and theiro- andp-monosubstituted nitro-, amino-, and chloro-derivatives. Anomalous behaviour is exhibited by the first three members of the series on both polar and non-polar stationary phases. For addition of a methylene group ton-propylbenzene or ap-substituted derivative, it is found that the retention increment, Δl CH2, approaches 100 units. However, the strong inductive effect of the group in the ortho position and the steric effects apparent in ano-substituted alkylbenzene lead to large variations of retention increment upon addition of-CH2-to the alkyl chain. A study ofn-alkylbenzene retention on Apiezon L and Carbowax 20M over a wide range of temperatures has verified the linearity of the retention increment with temperature and has revealed that this gradient increases with increasing carbon side-chain length for the first few members of the series, thereafter becoming constant. Functional retention increments, Δlx, for substitution of nitro-, amino- and chloro-groups into the benzene ring are given.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02261943
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    Gas-liquid chromatographic resolution of free dichlorophenol isomers on new stationary liquid phases (1983)
    Springer
    Chromatographia 17 (1983), S. 691-692 
    Details
    ISSN: 1612-1112
    Keywords: Dichlorophenol isomers ; Sodium benzenesulfonate ; Gas chromatography
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary It is difficult to separate all the dichlorophenol isomers as free phenols by gas-liquid chromatography. However they were effectively separated on 4,4′-dimethoxyazoxybenzene (liquid crystal), and all the isomers were separated appreciably well on sodium 1-naphthalenesulfonate, 2-naphthalenesulfonate and dodecylbenzenesulfonate.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02259322
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  • 143
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    A single-column gas chromatographic method for the analysis of gasolines containing oxygenated compounds (1983)
    Springer
    Chromatographia 17 (1983), S. 65-69 
    Details
    ISSN: 1612-1112
    Keywords: Gas chromatography ; Oxygenates ; Fused-silica capillary columns
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary A method of analysing gasolines that contain oxygenates has been developed. The method uses a single fusedsilica capillary column and gives quantitative data for the oxygenates and the hydrocarbons in one analysis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02259341
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  • 144
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    Electronic Resource
    Evaluation of the enrichment factor in gas chromatographic preconcentration of impurities (1983)
    Springer
    Chromatographia 17 (1983), S. 75-78 
    Details
    ISSN: 1612-1112
    Keywords: Gas chromatography ; Trace analysis ; GC-concentration ; Enrichment factor ; Theoretical evaluation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary Based on gas chromatographic retention data obtained on a given adsorbent and at a given trap efficiency at different temperatures new equations are proposed for the evaluation of the enrichment factor. These equations are suitable under various preconcentration conditions such as: equilibrium saturation, complete trapping and permissible losses. Compared to known expressions for the evaluation of the enrichment factor the equations suggested consider the band broadening of the impurity in a trap causing a loss of the substance at the adsorption stage and dilution of the sample during desorption when the desorbed impurities are directed into the gas chromatographic column without intermediate freezing out in an graphic column without intermediate freezing out in an empty tube. The new equations may be used to select the optimum preconcentration conditions providing the necessary sensitivity.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02259343
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  • 145
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    Electronic Resource
    Adsorption properties of thermally pretreated magnesium oxide and magnesium carbonate (1983)
    Springer
    Chromatographia 17 (1983), S. 191-194 
    Details
    ISSN: 1612-1112
    Keywords: Thermal treatment of MgO and MgCO3 ; Adsorption properties ; Gas chromatography
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary The changes in the chromatographic properties of MgO and MgCO3 due to thermal treatment was investigated. The experimental results show that thermally treated MgO and MgCO3 can be used as stationary phase for the gas-adsorption chromatography of hydrocarbon mixtures.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02290555
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  • 146
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    Electronic Resource
    Studies on the separation of metal acetylacetonates by gas chromatography (1983)
    Springer
    Chromatographia 17 (1983), S. 418-420 
    Details
    ISSN: 1612-1112
    Keywords: Separation of metal chelates ; Gas chromatography
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary A very good separation of the acetylacetonate of AL-(III), Cr(III) and Co(III) has been obtained by gas chromatography, on a column containing OV-17 silicone oil as the stationary phase.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02262921
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  • 147
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    Electronic Resource
    A study of some of the parameters in purge and trap gas chromatography (1983)
    Springer
    Chromatographia 17 (1983), S. 421-425 
    Details
    ISSN: 1612-1112
    Keywords: Gas chromatography ; Purge and trap sampling ; Cryogenic focussing ; Water analysis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary The most important operating parameters of a commercial purge and trap GC apparatus have been investigated. Band broadening problems arising from the slow desorption of compounds from the Tenax trap have been overcome by cryogenic focussing at the beginning of the column. Good results have been obtained with both packed and capillary columns. The sensitivity of the technique is sufficient to detect benzene in water at concentrations below 1μg kg−1 (1 ppb).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02262922
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  • 148
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    Electronic Resource
    The origin of the flame lonization detector (1983)
    Springer
    Chromatographia 17 (1983), S. 241-243 
    Details
    ISSN: 1612-1112
    Keywords: Gas chromatography ; Detectors ; Flame ionization detector ; History of chromatography
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary On the occasion of the 25-year anniversary of its invention, this article summarizes the events which led to the development of the flame ionization detector.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02263031
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  • 149
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    Electronic Resource
    Esterification of C1−C8 carboxylic acids to n-butyl esters in aqueous solutions for their gas chromatographic analysis (1983)
    Springer
    Chromatographia 17 (1983), S. 328-332 
    Details
    ISSN: 1612-1112
    Keywords: Esterification in aqueous solution ; n-Butyl esters of fatty acids ; Gas chromatography ; Fatty acid analysis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary The esterification of C1−C8 fatty acid in aqueous solutions and in the presence of sulfuric or hydrochloric acid and with n-butanol is described. It has been established that the esterification can be used for the quantitative determination of these fatty acids in the concentration ratio range of [H2O]/[n-BuOH]=0.01–5.3. In the concentration ratio range of 0.01–0.8 the water present does not interfere. In the concentration range of above 0.8 anhydrous sodium sulfate is used for binding the water, in the amount of [Na2SO4.anh.]/[H2O]≥0.2.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02270668
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  • 150
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    Electronic Resource
    Evaporation of the liquid stationary phase in gas chromatography (1983)
    Springer
    Chromatographia 17 (1983), S. 472-476 
    Details
    ISSN: 1612-1112
    Keywords: Gas chromatography ; Liquid stationary phase ; Liquid phase bleeding
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary The theory of the evaporation of the liquid stationary phase is elaborated and experimentally verified. On the basis of this theory the role played by the losses in the amount of liquid phase present is quantitatively determined. General techniques are examined which minimize the losses; these techniques are based on saturating the incoming carrier gas with liquid phase vapours and raising the pressure of the carrier gas in the column, e.g. by connecting a capillary to the column outlet in order to offer resistance to the gas flow. The application of these techniques ensures stable performance of the gas chromatographic columns using a volatile liquid phase.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02263267
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  • 151
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    Efficiency of cryogenic on-column and pre-column focusing of volatile compounds for high-resolution GC (1983)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 6 (1983), S. 36-37 
    Details
    ISSN: 0935-6304
    Keywords: Gas chromatography ; Capillary column ; Cryogenic focusing ; On-column, pre-column trapping ; Volatile aroma compounds ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240060109
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  • 152
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    Fused silica capillary GC/MS analysis of heterogeneous dihalogenated 1-propanols (1983)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 6 (1983), S. 38-39 
    Details
    ISSN: 0935-6304
    Keywords: Gas chromatography-mass spectrometry (GC/MS) ; Capillary, fused silica ; Dihalogenated propanols ; Positional isomers ; Haloperoxidase ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240060110
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  • 153
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    Concentration-dependent behavior of drugs in capillary gas chromatography using splitless injection (1983)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 6 (1983), S. 40-42 
    Details
    ISSN: 0935-6304
    Keywords: Gas chromatography ; Capillary columns ; Splitless Injection ; Drug analysis ; Concentration dependence of retention values ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240060111
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  • 154
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    Prediction of retention time of phenols in liquid chromatography (1983)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 6 (1983), S. 20-26 
    Details
    ISSN: 0935-6304
    Keywords: Reversed-phase mode liquid chromatography ; Rekker's hydrophobic fragmental constant ; Calculation of concentration of organic modifier ; Prediction of retention time of phenols ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The chromatographic behavior of phenols in reversed-phase mode liquid chromatography differs from that of non-ionic compounds such as alkyl alcohols, alkylbenzenes, halogenated benzenes, polyaromatic hydrocarbons, and aromatic acids. Therefore, the retention times of 61 phenols were measured in a system of an octadecyl bonded silica gel and acetonitrile/water mixtures. The logarithm of the capacity ratio (log k') was found to be a linear function of the hydrophobicity (log P) in acidic acetonitrile/water mixtures. This result was applied to a different octadecyl bonded silica gel. Eight phenols were selected as standard compounds, and their log k' values were measured in 0.05 M phosphoric acid in 10 to 90% acetonitrile/water mixtures. An empirical polynomial relation was obtained between the concentration of acetonitrile and the slope of the log k' vs log P curve. Finally the capacity ratio of all phenols were calculated in given eluents by the equations derived from the measurements of standard compounds and the calculated log P values. The difference between predicted capacity ratios and measured ones was within 10%.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240060105
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  • 155
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    Use of crystal hydrates as stationary phases for gas chromatography (1983)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 6 (1983), S. 42-44 
    Details
    ISSN: 0935-6304
    Keywords: Gas chromatography ; Mg(NO3)2 .6H2O as stationary phase ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240060112
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  • 156
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    Solute-support interactions in high performance gel filtration of proteins on TSK-GEL SW type column (1983)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 6 (1983), S. 45-46 
    Details
    ISSN: 0935-6304
    Keywords: Gel filtration of proteins ; Eluent parameters (pH and ionic strength) ; TSK-GEL G3000SW ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240060113
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  • 157
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    Masthead (1983)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 6 (1983) 
    Details
    ISSN: 0935-6304
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240060201
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  • 158
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    Electronic Resource
    Sample introduction in capillary gas-liquid chromatography (1983)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 6 (1983), S. 64-67 
    Details
    ISSN: 0935-6304
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240060203
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  • 159
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    A cold silanization method for preparation of medium polarity capillary columns (1983)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 6 (1983), S. 60-63 
    Details
    ISSN: 0935-6304
    Keywords: Gas chromatography ; Capillary column ; Cold silanization ; Medium polarity columns ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Silane-coupling agents, commonly used for fiberglass reinforced plastics (FRP), were applied for deactivation of silanol sites in glass capillary columns prior to coating with mediumpolarity phases such as Carbowax and Superox. The columns, prepared in a two-stage process in the case of glass (acidic leaching and drying, dynamic cold silanization followed by static coating with the phase) or a one stage process in the case of fused silica, gave the best results when deactivation and hence wettability were induced by glycidoxypropyltrimethoxy silane.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240060202
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  • 160
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    Strategies for compound identification and quantification using fused silica capillary column GC/MS (1983)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 6 (1983), S. 72-76 
    Details
    ISSN: 0935-6304
    Keywords: Gas chromatography/mass spectrometry ; Capillary column, fused silica ; Long term precision ; Pollutant analysis ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: A test mixture containing 28 compounds plus their stable isotopically labeled analogs was analyzed on a daily basis for one month during a series of routine fused silica capillary column GC/MS analyses in order to establish the precision with which retention times and responses were produced. These long-term precision data were evaluated to determine how to best predict retention times and how to best reproduce quantification. Results clearly indicate that relative retention times should be calculated using the reference compound eluted most closely to the target compound and that quantification should be based on relative response using a chemically “similar” compound.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240060205
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  • 161
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    Gas-liquid chromatographic determination of fenvalerate on woolen clothThis paper reflects the results of research only Mention of a pesticide in this paper does not constitute a recommendation for use by the USDA nor does it imply registration under FIFRA as amended. Mention of a proprietary product does not constitute an endorsement by the USDA. (1983)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 6 (1983), S. 193-195 
    Details
    ISSN: 0935-6304
    Keywords: Gas chromatography ; Residue analysis ; Fenvalerate ; Fabric protectant ; Woolen cloth ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: A method is described for the determination of fenvalerate (cyano(3-phenoxyphenyl)methyl 4-chloro-α-(1-methylethyl)-benzeneacetate) residues on woolen cloth. The fenvalerate was Soxhlet-extracted from the treated fabric with acetone for four hours at a reflux rate of six solvent exchanges per hour. The fenvalerate residue was determined by gas-liquid chromatography with a flame ionization detector. The results were quantitated by comparing integrator counts obtained from extracts of treated samples with those obtained from known standards. The method was sensitive to 0.00054% fenvalerate by weight. Recoveries from fabric treated with 0.00054% to 0.215% averaged 94.8%. The response of the detector was linear over a 400-fold range of fenvalerate concentrations.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240060406
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  • 162
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    An equation for the condition for the basic solvent effect in GLC (1983)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 6 (1983), S. 273-274 
    Details
    ISSN: 0935-6304
    Keywords: Gas chromatography ; Solvent effect ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240060510
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  • 163
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    A cleanup technique for samples containing high-level interferences prior to ion chromatographic analysis (1983)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 6 (1983), S. 275-277 
    Details
    ISSN: 0935-6304
    Keywords: Ion chromatography ; Low level ions detectable in highly caustic solutions ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240060511
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  • 164
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    A method of calculating the specific retention volumes of substances from their retention indices and specific retention volumes of n-alkanes (1983)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 6 (1983), S. 269-272 
    Details
    ISSN: 0935-6304
    Keywords: Gas chromatography ; Retention indices ; Specific retention volumes ; n-Alkanes ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The choice of stationary phase for gas chromatography is dictated by the nature of the analytes. Polarity and selectivity are known to play an important role. This paper suggests equations for calculation of specific retention volumes of any compounds from their retention indices.
    Additional Material: 3 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240060509
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  • 165
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    Gradient separations of complex mixtures by micro high-performance liquid chromatography (1983)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 6 (1983), S. 310-315 
    Details
    ISSN: 0935-6304
    Keywords: Micro-HPLC ; Gradient elution ; Epoxy resin oligomers ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: High-performance micro packed fused-silica and open-tubular glass capillary columns were prepared and applied to separations of complex mixtures. Solvent-gradient elution proved quite useful for the separation of solutes with wide polarity. Instruments and some applications are described.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240060605
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  • 166
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    Behaviour of fused silica capillaries subjected to gamma radiation. Part 2: Physical aspects (1983)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 6 (1983), S. 300-305 
    Details
    ISSN: 0935-6304
    Keywords: Fused silica capillary columns ; Flexibility ; Polyimide coating ; Cobalt-60 gamma radiation ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Five commercial varieties of uncoated fused silica capillary tubing used in high resolution gas chromatography were subjected to cobalt-60 gamma radiation. The advantages and superior performance of fused silica open tubular columns coated with OV-1 and subsequently immobilized or crosslinked in situ by radiation is reported in a previous paper in this Journal; however, in this investigation a loss in flexibility of irradiated capillaries was also noted. Quantitative measurements on flexibility were performed on specimens of irradiated fused silica capillaries, indicating that changes do indeed occur upon irradiation. Scanning electron micrographs also illustrate slight deterioration of the outer protective polyimide coating. Most surprisingly, it was also established that a variation does exist in the flexibility of the commercially available raw material studied.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240060603
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  • 167
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    Quantitative determination of low concentrations of DHETX m. s. in human plasma by high performance liquid chromatography with fluorescence detection (1983)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 6 (1983), S. 306-309 
    Details
    ISSN: 0935-6304
    Keywords: Liquid chromatography, HPLC ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: A method is described for separation of low amounts of DHETX m. s. from human plasma, based on extraction and determination by high performance liquid chromatography with fluorimetric detection.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240060604
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  • 168
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    Microbore column HPLC (1983)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 6 (1983), S. 348-358 
    Details
    ISSN: 0935-6304
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 10 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240060702
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  • 169
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    Heliflex chirasil-Val; GC of amino acid enantiomers (1983)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 6 (1983), S. 366-370 
    Details
    ISSN: 0935-6304
    Keywords: Gas chromatography ; Fused silica capillary column ; Chiral phase ; Amino acid enantiomers ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Heliflex Chirasil-Val, a modified form of the original Chirasil-Val phase coated on fused silica capillary, has been investigated with regard to its resolution efficiency and the separation profile for various enantiomeric derivatives of amino acid. The best results could be obtained with TFA-Et derivatives by reason of the relatively low column temperature required.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240060704
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  • 170
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    Determination of nitrate in water by microbore HPLC (1983)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 6 (1983), S. 383-385 
    Details
    ISSN: 0935-6304
    Keywords: Ion chromatography ; Indirect detection ; Water analysis ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240060709
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  • 171
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    Design and operation of a simple movable on-column injector (1983)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 6 (1983), S. 386-387 
    Details
    ISSN: 0935-6304
    Keywords: Gas chromatography ; Capillary columns ; On column injection ; Movable injector ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240060710
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  • 172
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    Fused silica capillary micro-packed columns for gas chromatography (1983)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 6 (1983), S. 388-389 
    Details
    ISSN: 0935-6304
    Keywords: Gas chromatography ; Fused silica capillary micro-packed columns ; Separation characteristics ; Application ; Separation of hydrocarbons ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240060711
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  • 173
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    Use of gold-plated Pt-ir tubing for joining glass capillary columns (1983)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 6 (1983), S. 392-393 
    Details
    ISSN: 0935-6304
    Keywords: Gas chromatography ; Capillary columns ; Hydrogen carrier gas ; Pt-Ir tubing ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240060713
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  • 174
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    Lack of evidence for dispersive interaction between polycyclic aromatic hydrocarbons and stationary phases in gas-liquid chromatography (1983)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 6 (1983), S. 390-391 
    Details
    ISSN: 0935-6304
    Keywords: Gas chromatography ; Dispersive interactions ; Inductive interactions ; Polycyclic aromatic hydrocarbons ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240060712
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  • 175
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    Chromatography calendar (1983)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 6 (1983), S. 394-396 
    Details
    ISSN: 0935-6304
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240060714
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  • 176
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    Letter to editors and readers (1983)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 6 (1983), S. 396-396 
    Details
    ISSN: 0935-6304
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240060715
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  • 177
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    Product news (1983)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 6 (1983), S. 399-400 
    Details
    ISSN: 0935-6304
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240060716
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  • 178
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    Masthead (1983)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 6 (1983) 
    Details
    ISSN: 0935-6304
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240060801
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  • 179
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    Ancillary solvent effects in GLC: Solute escape and its prevention (1983)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 6 (1983), S. 419-421 
    Details
    ISSN: 0935-6304
    Keywords: GLC ; Solute escape ; Solvent effects ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240060803
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  • 180
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    TLC photodensitometry in stability studies of cadralazineBased on a paper delivered at the 2nd International Symposium on Instrumental High Performance Thin Layer Chromatography, May, 1982, at Interlaken. (1983)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 6 (1983), S. 445-447 
    Details
    ISSN: 0935-6304
    Keywords: Thin layer chromatography, TLC ; Quantitation by TLC scanner ; Detection mode, fluorescence quenching ; Precision 1.8%, accuracy 2.7% ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240060811
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  • 181
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    Application of an electron-capture detector to the testing of high performance liquid chromatography microcolumns (1983)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 6 (1983), S. 451-451 
    Details
    ISSN: 0935-6304
    Keywords: High performance liquid chromatography, HPLC ; Electron-capture detector, ECD ; Extra-column broadening, ECB ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240060813
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  • 182
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    The solvent effect in gas-liquid chromatography: The analysis of vapor samples (1983)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 6 (1983), S. 567-568 
    Details
    ISSN: 0935-6304
    Keywords: Gas chromatography ; Solvent effect ; Headspace analysis ; Trace analysis ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240061008
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  • 183
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    Compressibility effects in the optimization of serially connected gas chromatographic capillary columns by the window diagram technique (1983)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 6 (1983), S. 569-570 
    Details
    ISSN: 0935-6304
    Keywords: Serially coupled capillary columns ; Window diagram ; Optimization ; Compressibility ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240061009
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  • 184
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    Analysis of bile acids in a serum by micro-HPLC (1983)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 6 (1983), S. 571-572 
    Details
    ISSN: 0935-6304
    Keywords: Micro HPLC ; Bile acids ; Precolumn concentration ; Postcolumn reaction ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240061010
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  • 185
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    Reversed phase HPLC separation of fossil chlorins (1983)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 6 (1983), S. 573-574 
    Details
    ISSN: 0935-6304
    Keywords: Reversed phase HPLC ; Fluorimetric detection ; Fossil chlorins ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240061011
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  • 186
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    Guidelines on how to carry out on-column injections (1983)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 6 (1983), S. 581-583 
    Details
    ISSN: 0935-6304
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240061014
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  • 187
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    Specific retention volumes and retention indices of selected hydrocarbon solutes with OV-101 and SP-2100 polydimethylsiloxane solvents (1983)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 6 (1983), S. 577-580 
    Details
    ISSN: 0935-6304
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 3 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240061013
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  • 188
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    Method of separation and detection of substances on silica gel thin films impregnated with silver nitrate and phosphatotungstic acid (1983)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 6 (1983), S. 575-576 
    Details
    ISSN: 0935-6304
    Keywords: Thin-film chromatography, HPTFC ; Separation on argentized silica gel ; Detection ; Scanning densitometry ; Lipids ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240061012
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  • 189
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    Advances in liquid chromatography (1983)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 6 (1983), S. 583-583 
    Details
    ISSN: 0935-6304
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240061015
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  • 190
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    Product news (1983)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 6 (1983), S. 584-584 
    Details
    ISSN: 0935-6304
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240061016
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  • 191
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    Masthead (1983)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 6 (1983) 
    Details
    ISSN: 0935-6304
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240060101
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  • 192
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    Halogenated compound response in an oxygen doped ion mobility detector for capillary gas chromatography (1983)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 6 (1983), S. 4-10 
    Details
    ISSN: 0935-6304
    Keywords: Gas chromatography ; Ion mobility detector ; Plasma chromatography ; Selective detection ; Quantitative analysis ; Halogenated compounds ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: An ion mobility detector that has been specifically developed for interfacing with capillary gas chromatography is investigated in the negative ion mode. Like the electron capture detector, to which this instrument is closely related, the ion mobility detector shows an enhanced response to low molecular weight halogenated compounds when a small quantity of oxygen is doped into the make-up gas flow. Under O2 doping conditions, the device can operate in a reactant ion monitoring mode responding universally to compounds capable of capturing thermal electrons and in a tunable selective product ion mode providing increased selectivity over that achieved by the ECD. At an oxygen concentration of 0.5%, minimum detectable amounts as low as 600 femtograms have been realized for carbon tetrachloride. Selectivity of chloro- versus bromo- compounds is demonstrated using a mixture of p-dichlorobenzene and p-dibromobenzene.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240060102
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  • 193
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    Trace analysis of halocarbons in water; Direct aqueous injection with electron capture detection (1983)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 6 (1983), S. 11-15 
    Details
    ISSN: 0935-6304
    Keywords: Gas chromatography ; Capillary, glass ; ECD ; Halocarbons in water, 0.1-10 ppb ; 0.5-2 μl injected on-column ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Interest in monitoring halogenated organics in drinking water and natural surface and ground water in the low ppb range continues to grow. There is a tendency to include still more volatile halocarbons, the trace determination of which is known to be rather demanding. This prompted us to re-examine the feasibility of large-volume direct aqueous injection onto capillary columns, coupled with ECD. A primary problem was to avoid simultaneous elution of water with halocarbons, since water suppresses the ground current of the ECD. The following measures contributed to the solution of this problem.Apolar, extremely inert, columns are required to elute water completely, and even before very light halocarbons. Their coatings have to be far thicker (≍ 5 mUm) than commonly employed thick films since they must permit isothermal analysis at a column temperature around 100°C in order to ensure rapid and complete elution of water. Finally, it is essential that sampling be carried out on-column for two reasons: diffusion of water vapor in the injector, resulting in delayed elution, is then eliminated, and peak distortion during splitless injection is avoided.Although we now know that persilylated columns with immobilized coatings withstand routine water injections, more longterm experience is needed to provide detailed recommendations for the handling of these columns.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240060103
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  • 194
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    Derivatives of cholesterol cinnamate: A comparison of the separations of geometrical isomers when used as gas chromatographic stationary phasesMention of a commercial or proprietary product does not constitute an endorsement by the USDA. (1983)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 6 (1983), S. 16-19 
    Details
    ISSN: 0935-6304
    Keywords: Capillary gas chromatography ; Liquid crystal stationary phases ; para-Substituted cholesterol cinnamate ; Geometrical isomers (insect pheromones) ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Four para-substituted cholesterol cinnamates were synthesized and evaluated for utility as gas chromatograph (GC) liquid crystal stationary phases. The capability of the phases to separate olefinic geometrical isomers was found to be dependent on the position of the olefinic bond. When unsaturation occurred at positions four carbons or greater from the terminal methyl of the compounds investigated, the relative ability of the phases to separate geometrical isomers was p-Cl 〉 p-Me 〉 cholesterol cinnamate 〉 p-MeO derivative 〉 p-NO2. When unsaturation occurred at positions four carbons or less from the terminal methyl the relative ability of the para-derivatives of cholesterol cinnamate to separate geometrical isomers was reversed.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240060104
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  • 195
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    Dependence of selectivity and resolution upon composition of the binary mobile phase in LSC (1983)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 6 (1983), S. 27-30 
    Details
    ISSN: 0935-6304
    Keywords: Liquid chromatography ; LSC with binary eluents ; Resolution in LSC ; Selectivity in LSC ; Adsorption LC ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The recently derived general equation for the capacity ratio has been utilized to study the dependence of selectivity and resolution upon mobile phase composition. This equation accounts for differences in molecular size of solutes and solvents, and for the energetic heterogeneity of the adscrbent surface. Model calculations illustrating the influence of these factors on the selectivity and resolution are presented and discussed.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240060106
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  • 196
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    Aqueous two-layer liquid distribution for chromatographic resolution of nucleoside analogues (1983)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 6 (1983), S. 33-33 
    Details
    ISSN: 0935-6304
    Keywords: Liquid-liquid partition chromatography, HPLC ; Liquid-liquid distribution ; Nucleoside ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240060107
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  • 197
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    Effect of water on retention time (1983)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 6 (1983), S. 34-35 
    Details
    ISSN: 0935-6304
    Keywords: Gas chromatography ; Capillary, glass ; Samples with varying water content ; Retention times correlated with water content ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240060108
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  • 198
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    Chromatography calendar (1983)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 6 (1983), S. 51-52 
    Details
    ISSN: 0935-6304
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240060118
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  • 199
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    Product news (1983)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 6 (1983), S. 54-54 
    Details
    ISSN: 0935-6304
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240060119
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  • 200
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    Optimization of a scanning densitometer for fluorescence detection in high performance thin-layer chromatography (1983)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 6 (1983), S. 77-81 
    Details
    ISSN: 0935-6304
    Keywords: High performance thin-layer chromatography, HPTLC ; Fluorescence quantitation ; Scanning densitomery ; Resolution ; Signal-to-noise ratio ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Conditions for maximizing resolution and signal-to-noise ratios in fluorescence scanning densitometry of separations obtained by high performance thin-layer chromatography are described. Resolution was found to be independent of most instrument parameters with a small decrease observed at wide slit widths. Signal was found to be markedly dependent on experimental parameters such as slit width, slit height, sensitivity setting, and the time constant of electronic filters. For recording chromatograms a slit width of 1.00 mm, a slit height slightly greater than the spot diameter, a low sensitivity setting (50 mV), electronic filtering, and a scan rate of 24 or 48 mm min-1 are commensurate with minimum recording time and maximum sample detectability without incurring a significant decrease in resolution.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240060206
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