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  • 1
    Electronic Resource
    Electronic Resource
    Book reviews (1993)
    Springer
    Chromatographia 35 (1993), S. 459-462 
    Details
    ISSN: 1612-1112
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02278603
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Phosphorus-31 NMR saturation-transfer measurements in Saccharomyces cerevisiae: characterization of phosphate exchange reactions by iodoacetate and antimycin A inhibition (1987)
    s.l. : American Chemical Society
    Biochemistry 26 (1987), S. 7483-7492 
    Details
    ISSN: 1520-4995
    Source: ACS Legacy Archives
    Topics: Biology , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/bi00397a043
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Significance of atmospheric inputs of lead to grassland at one site in the United Kingdom since 1860 (1991)
    s.l. : American Chemical Society
    Environmental science & technology 25 (1991), S. 1174-1178 
    Details
    ISSN: 1520-5851
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/es00018a025
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Proton activation analysis for the measurement of fluorine in food samples (1982)
    s.l. : American Chemical Society
    Analytical chemistry 54 (1982), S. 407-413 
    Details
    ISSN: 1520-6882
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ac00240a012
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    The effect of short-term dietary supplementation with glucose on gastric emptying of glucose and fructose and oral glucose tolerance in normal subjects (1996)
    Springer
    Diabetologia 39 (1996), S. 481-486 
    Details
    ISSN: 1432-0428
    Keywords: Keywords Gastric emptying ; glucose tolerance ; fructose ; gastric inhibitory polypeptide ; diet.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Recent observations indicate that gastric emptying may be influenced by patterns of previous nutrient intake. The aims of this study were to determine the effects of a high glucose diet on gastric emptying of glucose and fructose, and the impact of any changes in gastric emptying on plasma concentrations of glucose, insulin and gastric inhibitory polypeptide in response to glucose and fructose loads. Gastric emptying of glucose and fructose (both 75 g dissolved in 350 ml water) were measured in seven normal volunteers on separate days while each was on a ’standard' diet and an identical diet supplemented with 440 g/day of glucose for 4–7 days. Venous blood samples for measurement of plasma glucose, insulin and gastric inhibitory polypeptide levels were taken immediately before and for 180 min after ingestion of glucose and fructose loads. Dietary glucose supplementation accelerated gastric emptying of glucose (50 % emptying time 82 ± 8 vs 106 ± 10 min, p = 0.004) and fructose (73 ± 9 vs 106 ± 9 min, p = 0.001). After ingestion of glucose, plasma concentrations of insulin (p 〈 0.05) and gastric inhibitory polypeptide (p 〈 0.05) were higher during the glucose-supplemented diet. In contrast, plasma glucose concentrations at 60 min and 75 min were lower (p 〈 0.05) on the glucose-supplemented diet. We conclude that short-term supplementation of the diet with glucose accelerates gastric emptying of glucose and fructose, presumably as a result of reduced feedback inhibition of gastric emptying from small intestinal luminal receptors. More rapid gastric emptying of glucose has a significant impact on glucose tolerance. [Diabetologia (1996) 39: 481–486]
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00400681
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    The effect of short-term dietary supplementation with glucose on gastric emptying of glucose and fructose and oral glucose tolerance in normal subjects (1996)
    Springer
    Diabetologia 39 (1996), S. 481-486 
    Details
    ISSN: 1432-0428
    Keywords: Gastric emptying ; glucose tolerance ; fructose ; gastric inhibitory polypeptide ; diet
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Recent observations indicate that gastric emptying may be influenced by patterns of previous nutrient intake. The aims of this study were to determine the effects of a high glucose diet on gastric emptying of glucose and fructose, and the impact of any changes in gastric emptying on plasma concentrations of glucose, insulin and gastric inhibitory polypeptide in response to glucose and fructose loads. Gastric emptying of glucose and fructose (both 75 g dissolved in 350 ml water) were measured in seven normal volunteers on separate days while each was on a ‘standard’ diet and an identical diet supplemented with 440 g/day of glucose for 4–7 days. Venous blood samples for measurement of plasma glucose, insulin and gastric inhibitory polypeptide levels were taken immediately before and for 180 min after ingestion of glucose and fructose loads. Dietary glucose supplementation accelerated gastric emptying of glucose (50% emptying time 82±8 vs 106±10 min, p=0.004) and fructose (73±9 vs 106±9 min, p=0.001). After ingestion of glucose, plasma concentrations of insulin (p〈0.05) and gastric inhibitory polypeptide (p〈0.05) were higher during the glucose-supplemented diet. In contrast, plasma glucose concentrations at 60 min and 75 min were lower (p〈0.05) on the glucose-supplemented diet. We conclude that short-term supplementation of the diet with glucose accelerates gastric emptying of glucose and fructose, presumably as a result of reduced feedback inhibition of gastric emptying from small intestinal luminal receptors. More rapid gastric emptying of glucose has a significant impact on glucose tolerance.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00400681
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    Paper (German National Licenses)
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  • 7
    Electronic Resource
    Electronic Resource
    Adenovirus-related RNA sequences in human neurogenic tumors (1982)
    Springer
    Acta neuropathologica 56 (1982), S. 113-117 
    Details
    ISSN: 1432-0533
    Keywords: Brain tumours ; Etiology ; Adenoviruses ; Nucleic acid hybridization
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Thirty two human tumours, mainly neurogenic, have been investigated for the presence of adenovirus-related RNA sequences.3H-labelled tumour virus DNA probes derived from human adenoviruses types 2 and 12, bovine adenovirus type 3, and avian adenovirus CELO were hybridized in-situ on tumour kryostat sections under conditions that detect complementary RNA. Tumour virus-related RNA was detected in 62% of all tumours tested, but was not detectable in normal human brain tissues. Expression of tumour virus-related RNA was found in 2/4 astrocytomas, 2/4 metastatic brain carcinomas, 2/2 glioblastomas, 1/1 melanoma, 5/7 meningiomas, 4/4 neurinomas, 1/2 oligodendrogliomas, and 1/1 rhabdomyosarcoma. The presence of adenovirus-related RNA in the majority of human neurogenic tumours may reflect a viral involvement in the pathogenesis of these tumours.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00690581
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  • 8
    Electronic Resource
    Electronic Resource
    Papovavirus-related RNA sequences in human neurogenic tumours (1982)
    Springer
    Acta neuropathologica 56 (1982), S. 118-122 
    Details
    ISSN: 1432-0533
    Keywords: Papovaviruses ; Brain tumours ; Etiology ; Nucleic acid hybridization
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Thirty-two human brain tumours were investigated for the presence of papovavirus-related RNA sequences. Radiolabelled viral DNAs isolated from SV40, BKV, HDV, and BPV were hybridized insitu on to tumour kryostat sections under conditions that detect complementary RNA. SV40-related RNA was detectable in 34% of all tumours tested but was not found in normal human brain tissue. SV 40-positive tumours included 1/1 angiofibroma, 1/4 astrocytomas, 2/4 metastatic brain tumours, 1/1 melanoma, 3/7 meningiomas, 2/4 neurinomas, 1/2 oligodendrogliomas. Bovine papilloma virus-, BKV-, and HDV-related RNAs were absent from all tissues tested. The presence of SV 40-related nucleic acids in a large number of human neurogenic tumours may reflect a viral involvement in the etiology of these tumours.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00690582
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  • 9
    Electronic Resource
    Electronic Resource
    Evidence of in situ diel vertical migration of a red-tide microplankton species in Ría de Vigo (NW Spain) (1995)
    Springer
    Marine biology 123 (1995), S. 607-617 
    Details
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The migration capacity of red-tide species in the natural environment was studied at a station in the Ría de Vigo (Rías Bajas, NW Spain) over a 24 h period in September 1991. The Ría de Vigo, where red tides are frequent, normally shows a positive estuarine circulation and is subjected to seasonal upwelling and downwelling phenomena. A marked diel pattern was observed for five species that are capable of causing red tides (Ceratium furca, Scrippsiella trochoidea, Dinophysis acuminata, Mesodinium rubrum, and Eutreptiella sp.). Such diel behaviour could be clearly advantageous in a stratified environment where light and nutrients are often in two separate layers. Active movement enables species such as dinoflagellates and some ciliates to exploit high levels of irradiance at the surface during the day and to take up nutrients in deeper layers at night. Patchy distribution of phytoplankton, shear-induced horizontal dispersion and density variations were considered, but none of them accounted for the vertical changes observed. Vertical migration is thought to be one of the mechanisms that could promote blooms in nutrient-depleted surface layers.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00349239
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  • 10
    Electronic Resource
    Electronic Resource
    Comparisons among species ofAlexandrium (Dinophyceae) grown in nitrogen- or phosphorus-limiting batch culture (1996)
    Springer
    Marine biology 126 (1996), S. 9-18 
    Details
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Three species of the dinoflagellate genusAlexandrium (Halim)-two strains of toxic.A. minutum, one each of nontoxicA. tamarense andA. affini-were grown in batch culture in either a low-nitrogen or a low-phosphate medium. Maximum carbon-specific growth rates forA. tamarense were lower (at 〈0.25 d-1) than for the other strains, which all exceeded 0.38 d-1. C-quotas (C content per cell) during exponential growth were similar for all strains (∼2.5 ng C cell-1), with cells becoming smaller during the N-limiting stationary phase, but enlarging during prolonged P-deprivation. Values of δ13C during the exponential phase were low (-25to-30), with most cells during the light phase swimming at the surface when nutrient-replete and migrating to the bottom of the flasks when nutrient-deplete with δ13C rising to around-15. Biomass could not be estimated reliably from pigmentation, but could be estimated from biovolume (r〉0.95), although this was complicated in cultures ofA. minutum by the presence of particles comprized of thecal plates of a similar size to intact cells. Alkaline phosphatase activity was not a reliable indicator a P-status. The most toxic strain tested (A. minutum AL1V) contained the highest concentrations of free amino acids, of arginine (a precursor of paralytic shellfish toxins) and of proline, and also had the lowest C:N mass ratio (at 4.3).A. affini contained the lowest concentrations of arginine, andA. tamarense the highest exponential phase C:N (7.8). For all strains, the mole ratio of intracellular glutamine: glutamate (Gln: Glu, which was abnormally high compared to other algae) could only be used to indicate the presence or absence of N-stress rather than the degree of stress. Additions of ammonium and phosphate resulted in increases in Gln: Glu within 20 min in N-stressed cells and also enhanced toxin content inA. minutum (mainly gonyautoxin) 4 over a 24 h period.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00571372
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