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  • 1
    Digitale Medien
    Digitale Medien
    Repulsion-Only Assumption or the Long-Range Attraction-Repulsion Assumption? (1994)
    s.l. : American Chemical Society
    Macromolecules 27 (1994), S. 5218-5219 
    Details
    ISSN: 1520-5835
    Quelle: ACS Legacy Archives
    Thema: Chemie und Pharmazie , Physik
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1021/ma00096a054
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  • 2
    Digitale Medien
    Digitale Medien
    Influence of the sample preparation method of the ultra-small-angle x-ray scattering of lightly sulfonated polystyrenes (1993)
    s.l. : American Chemical Society
    Macromolecules 26 (1993), S. 4064-4066 
    Details
    ISSN: 1520-5835
    Quelle: ACS Legacy Archives
    Thema: Chemie und Pharmazie , Physik
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1021/ma00067a055
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  • 3
    Digitale Medien
    Digitale Medien
    PLASMA ADENOSINE CONCENTRATIONS ARE ELEVATED IN CONSCIOUS SPONTANEOUSLY HYPERTENSIVE RATS (1992)
    Oxford, UK : Blackwell Publishing Ltd
    Clinical and experimental pharmacology and physiology 19 (1992), S. 0 
    Details
    ISSN: 1440-1681
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Medizin
    Notizen: 1. Plasma levels of adenosine were measured in unrestrained, conscious spontaneously hypertensive rats (SHR) to examine the potential role of adenosine, a naturally occurring substance with profound cardiovascular actions, in cardiovascular regulation in these genetically hypertensive rats.2. We employed a specific and sensitive assay for adenosine based on fluorescent determination of adenine compounds by high performance liquid chromatography.3. Plasma adenosine concentrations were significantly higher in 13 week old SHR with hypertension than in Wistar-Kyoto rats (0.165±0.022 vs 0.096±0.008 μmol/L; P 〈 0.05).4. These observations indicate that plasma adenosine levels are increased in conscious SHR with established hypertension, and also suggest that adenosine may be at least partly involved in the pathophysiology of high blood pressure in SHR.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1440-1681.1992.tb00505.x
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  • 4
    Digitale Medien
    Digitale Medien
    ELISA inhibition method in detection of mite and chironomid antigens in environmental samples of dust, soil and air (1990)
    Oxford, UK : Blackwell Publishing Ltd
    Allergy 45 (1990), S. 0 
    Details
    ISSN: 1398-9995
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Medizin
    Notizen: To determine the amount of chironomids and mite antigens in the indoor and outdoor environment, we investigated samples from air, soil and house dust in the area around Lake Kojima, located in the western part of Japan. Three species of chironomid (Tokunagayusurika akamusi, Chironomus yoshimatsui and Chironomus plumosus) and a species of mite, Dermatophagoides farinae antigens were studied. The antigens were detected and quantified by inhibition ELISA. In the outdoor environment, C. yoshimatsui and T. akamusi antigens were more abundant than mite antigen, and seasonal fluctuations were observed. In the indoor environment, mite was the predominant antigen. D. farinae antigen was detected in almost all dust samples, with a slight reduction in winter compared to summer.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1398-9995.1990.tb00479.x
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  • 5
    Digitale Medien
    Digitale Medien
    Developmental change of chironomid allergen during metamorphosis (1990)
    Oxford, UK : Blackwell Publishing Ltd
    Allergy 45 (1990), S. 0 
    Details
    ISSN: 1398-9995
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Medizin
    Notizen: The development of allergen during metamorphosis of chironomids, Chironomus yoshimatsui and Tokunagayusurika akamusi, was studied by means of ELISA inhibition with pooled serum containing high titer of specific IgE to each adult midge. Extracts of C. yoshimatsui larvae and pupae did not inhibit the specific IgE antibody to adult C. yoshimatsui. Mature adult C. yoshimatsui extract had about 10 times more inhibitory substance than the young adult. Hemoglobin, however, was degraded during the metamorphosis as measured by spectrophotometry and HPLC. The inhibitory substance against specific IgE antibody to adult T. akamusi was identified as highest in female body, less in egg, and even less in wing, leg and male body. The size of the substance in egg and female body was estimated at 〉 500 kD of molecular weight.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1398-9995.1990.tb00468.x
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  • 6
    Digitale Medien
    Digitale Medien
    Role of adenosine A1 and A2 receptors in the regulation of aldosterone production in rat adrenal glands (1990)
    Springer
    Cellular and molecular life sciences 46 (1990), S. 726-728 
    Details
    ISSN: 1420-9071
    Schlagwort(e): Aldosterone ; cyclic AMP ; adenosine ; adenosine A1 ; receptor ; adenosine A2 receptor
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Medizin
    Notizen: Summary To investigate the roles of adenosine A1 and A2 receptors in the regulation of aldosterone production, we examined the effects of adenosine and adenosine agonists (N6-cyclohexyl adenosine; selective adenosine A1 receptor agonist and 5′-N-ethylcarboxamine adenosine; selective adenosine A2 receptor agonist) on aldosterone and cyclic AMP production in rat adrenal capsular cells. Neither adenosine nor 5′-N-ethylcarboxamine adenosine caused significant effects on basal aldosterone or cyclic AMP production. Also, adenosine (10−3M) showed no consistent effects on aldosterone and cyclic AMP production induced by ACTH. On the other hand, N6-cyclohexyl adenosine exhibited a significant inhibition of basal aldosterone and cyclic AMP production at doses of 10−4 M and 10−3 M; furthermore, 10−3 M N6-cyclohexyl adenosine inhibited aldosterone and cyclic AMP production stimulated by ACTH. These results suggest that adenosine A1 receptors are coupled to and inhibit adenylate cyclase and may be involved in the inhibition of aldosterone production.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01939947
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  • 7
    Digitale Medien
    Digitale Medien
    X chromosome inactivation analysis to distinguish sporadic cases of X-linked agammaglobulinaemia from common variable immunodeficiency (1993)
    Springer
    European journal of pediatrics 152 (1993), S. 900-904 
    Details
    ISSN: 1432-1076
    Schlagwort(e): X-linked agammaglobulinaemia ; Carrier detection ; Common variable immunodeficiency ; X chromosome inactivation analysis
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract The X chromosome inactivation analysis of eight female relatives was performed to elucidate the X chromosome gene defect of six male hypogammaglobulinaemic individuals. The patients had diminished numbers of circulating B-cells and no relevant family history. The methylation status of three X-linked genes, phosphoglycerate kinase, hypoxanthine phosphoribosyl transferase and DXS255, was determined on DNA from Epstein-Barr virus-transformed B-cell lines established from the female relatives. The methylation pattern of at least one gene was informative in all eight females examined. While both alleles were equally methylated in four of eight females, the remaining four female relatives of three hypogammaglobulinaemia patients exhibited a non-random methylation pattern in their B-cells, suggesting that these three patients represented sporadic cases of X-linked agammaglobulinaemia (XLA). The clinical or immunological status of these three patients did not differ from the remaining two who had early onset hypogammaglobulinaemia and who were tentatively diagnosed as having common variable immunodeficiency. The sixth patient had recurrent infections after undergoing surgical removal of a brain tumour at 22 years of age, although his immunological features did not distinguish him from the other patients. X chromosome inactivation analysis can be useful in differentiating XLA from hypogammaglobulinaemia in male patients.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01957526
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  • 8
    Digitale Medien
    Digitale Medien
    Plasma nitriding of Fe-18Cr-9Ni in the range of 723–823 K (1991)
    Springer
    Oxidation of metals 36 (1991), S. 143-156 
    Details
    ISSN: 1573-4889
    Schlagwort(e): plasma nitriding ; Fe-18Cr-9Ni ; CrN precipitates ; nitrogen diffusion ; kinetics
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Maschinenbau
    Notizen: Abstract To clarify the mechanism of plasma nitriding, we examined the optical microstructure, the hardness, the precipitation, and the concentration of dissolved nitrogen in Fe-18Cr-9Ni nitrided using plasma in the range of 723–823 K. Compared with ammonia-gas nitriding, the features of plasma nitriding are the formation of small chromium-nitride precipitates (CrN), the absence of an externally nitrided layer, the high concentration of dissolved nitrogen, and the high hardness (HV=1200). The diffusion coefficient of nitrogen in the present alloy was determined using the growth rate of the internally nitrided layer, based on calculations used in internal oxidation. Plasma- and gas-nitriding were also compared with respect to the growth rate of the nitrided layer.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00938459
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  • 9
    Digitale Medien
    Digitale Medien
    Design of a fast method to produce14C-labeled carboxylic acids (1993)
    Springer
    Journal of radioanalytical and nuclear chemistry 175 (1993), S. 219-228 
    Details
    ISSN: 1588-2780
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie , Energietechnik
    Notizen: Abstract An efficient method to produce [1-14C] benzoic acid within a total time less than 20 min in high chemical and radiochemical yield is described. The procedure we report can be applied for the preparation of [11C]-labeled carboxylic acids suitable for evaluation in the study of human metabolism by positron emission tomography.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02163347
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  • 10
    Digitale Medien
    Digitale Medien
    Effect of plasma on nitriding of Fe-18Cr-9Ni alloy (1992)
    Springer
    Journal of materials science 27 (1992), S. 637-640 
    Details
    ISSN: 1573-4803
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Maschinenbau
    Notizen: Abstract The plasma nitriding behaviour of Fe-18Cr-9Ni alloy was compared with gas nitriding. The alloy was nitrided under the following conditions: specimen temperature: 823 K, nitriding time: mainly 108 ks, total pressure: 0.4–0.7 kPa, mixture ratio of N2 and H2∶ 0.25, discharge voltage: 350–450 V, current: 0.8–1.1 A. Formation of a surface layer of iron nitrides was not observed. Formation of a homogeneous internal nitriding layer, consisting of small precipitates of CrN and the γ-phase matrix, was, however, noted. The lattice constant at the specimen surface was smaller than that at greater depth. This may have been because the sputtering effect decreased the dissolved nitrogen content at the specimen surface. The sputtering of iron nitrides at the specimen surface by the plasma was experimentally confirmed through γ′-Fe4N formation on Si beside an alloy specimen. The characteristics of the plasma nitriding mentioned above are discussed in relation to the sputtering.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02403871
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