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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Cellular and molecular life sciences 42 (1986), S. 107-107 
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1432-1440
    Keywords: Diabetes prevalence ; juvenile diabetes ; diabetes definition ; blood glucose determination ; Diabetes-Prävalenz ; jugendlicher Diabetes ; Diabetes-Definitionen ; Blutzuckerbestimmungsmethoden
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung In einer jugendlichen schweizerischen Bevölkerungsgruppe wurde die Häufigkeit eines klinisch manifesten und latenten Diabetes mellitus untersucht. Diese betrug 0.06 resp. 1,7%. Die Problematik der Diabetes-Prävalenz in einer definierten Population zeigt sich nicht nur in der Anwendung bestimmter Definitions-Kriterien, sondern auch in der angewandten Methodologie. Es werden die Abweichungen der mittleren Blutzuckerwerte bei simultaner Bestimmung nach sieben verschiedenen Methoden angeführt. Es wird auf fehlende Abhängigkeiten von Alter, Gewicht, Körperoberfläche und biochemischen Parametern (Harnstoff-N, Eiweiß und Cholesterin) sowie vorgängiger Kohlenhydratzufuhr auf den Blutzuckerwert hingewiesen, wenn enzymatische Glucosebestimmungen durchgeführt werden.
    Notes: Summary The prevalence of juvenile diabetes has been examined in a sample of a Swiss population. There was an estimate of 0.06% of clinical and of 1.7% latent diabetes in a group of males of age 20. The problems of assessing diabetes prevalence are discussed in relation to criteria of definition and blood sugar methodology. The differences of seven simultaneous determinations of blood glucose are presented. There was no dependance of fasting blood glucose values in a hospital population in relation to age, weight, body surface and chemical parameters as BUN, total proteins, cholesterol, and the previous intake of carbohydrates as long as an enzymatic glucose determination was performed.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1432-0789
    Keywords: Dactyladenia barteri ; Leucaena leucocephala ; Lignin ; Nitrogen mineralization ; Nitrogen leaching
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Geosciences , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary The evolution of mineral and hydrosoluble organic N released from two soils differing in pH and treated with leaves of Leucaena leucocephala (0, 8.3, 16.7, and 33. g kg-1 soil), Dactyladenia barteri (syn. Acioa barteri; 0 and 16.7 g), and their mixtures was studied in the laboratory using the aerobic incubation-leaching method. N mineralization in untreated soils and in soils supplemented with 8.3 g leucaena leaves was 41–53% higher in the soil from Onne (pH 4.7) than in the soil from Ibadan (pH 6.2), but the organic N content was similar with these treatments in the leachates of the soils from both locations. The application of 16.7 or 33.3 g of either or both type of leaves reduced the rate of mineral N production during the first 4 weeks, particularly in soils treated with dactyladenia leaves (C:N=36). After this lag period, N mineralization proceeded at a faster rate in the soil from Ibadan treated with 16.7 or 33.3 g of leucaena leaves (C:N=12), even in the presence of dactyladenia leaves. In Ibadan soil, after 12 weeks, mineral N apprently derived from leaves of both dactyladenia and leucaena averaged 6.3% of the N applied, and organic N from leaves averaged 9.5%. The addition of dactyladenia and leucaena leaves did not increases the mineral N content in the acid soil from Onne but leaching of soluble organic N with addition of 16.7 or 33.3 g of leaves contributed an N-mineralizable pool of 5.9% of the N applied.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Nuclear Physics, Section A 467 (1987), S. 1-28 
    ISSN: 0375-9474
    Keywords: Nuclear Reaction
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Nuclear Physics, Section A 250 (1975), S. 106-126 
    ISSN: 0375-9474
    Keywords: Radioactivity
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
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  • 6
    ISSN: 0375-9474
    Keywords: Nuclear reaction
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 55 (1989), S. 259-261 
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The characteristics of Schottky diodes on n-GaAs fabricated after an in situ low-pressure rf H2 plasma treatment have been investigated as a function of the substrate temperature during the plasma treatment. Degraded rectifying characteristics result after room-temperature treatments, while diodes with ideality factor as low as 1.01 were achieved in the temperature range 160–240 °C. An increase in barrier height was also observed with increasing substrate temperature during plasma treatment. The contact properties are correlated to H diffusion in a surface layer of GaAs, which passivates the dopant atoms and defect sites.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Science Ltd
    Journal of neurochemistry 85 (2003), S. 0 
    ISSN: 1471-4159
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: The neuropeptide secretoneurin (SN) is an endoproteolytic product of the chromogranin secretogranin II. We investigated the effects of SN on the differentiation of immature cerebellar granule cells derived from the external granular layer (EGL). Secretoneurin caused concentration-dependent increases in neurite outgrowth, reflecting differentiation. The maximum effect was reached at a concentration of 100 nm SN. Secretoneurin immunoneutralization using specific antiserum significantly decreased neurite outgrowth; however, neurite morphology was altered. An affinity chromatography-purified antibody significantly inhibited the outgrowth response to SN (p 〈 0.001) without altering the morphology. Binding studies suggest the existence of specific G-protein-coupled receptors on the surface of monocytes that recognize SN. Assuming that SN promotes neurite outgrowth in EGL cells by acting through a similar G-protein-coupled mechanism, we treated SN-stimulated EGL cultures with pertussis toxin. Exposure to pertussis toxin (0.1 µg/mL) showed a significant inhibition of the SN-induced outgrowth. To establish a second messenger pathway we used the protein kinase C inhibitor staurosporine. We found that EGL cell viability was not enhanced following chronic SN treatment for 24 h. These data indicate that SN is a novel trophic substance that can affect cerebellar maturation, primarily by accelerating granule cell differentiation through a signalling mechanism that is coupled to pertussis toxin-sensitive G-proteins.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 69 (1991), S. 2356-2364 
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The influence of the GaAs surface condition on the properties and thermal stability of WNx Schottky diodes on GaAs has been studied by performing in situ H2 and N2 plasma treatments just before the WNx sputter deposition. The WNx/GaAs contacts have been investigated by x-ray photoelectron spectroscopy, Rutherford backscattering, nuclear reaction analysis, secondary ion-mass spectroscopy, x-ray diffraction, and transmission electron microscope and correlated to electrical current-voltage and capacitance-voltage measurements. A strong correlation was found between the diode properties and the surface conditions, both for the as-deposited samples and for samples annealed in the range 700–850 °C. Poor rectifying properties were obtained for the plasma-cleaned diodes due to the cumulative effects of plasma cleaning and sputter deposition. After annealing, improved characteristics were generally found. The highest Schottky barrier height values φI-V=0.76 V, which were found for the H2 plasma treated diodes annealed at 800 °C, were almost independent of the WNx composition and sputtering conditions. The H2 treated samples also showed the smoothest WNx/GaAs interface. HCl cleaned and N2 treated surface also showed high-barrier height and small interfacial reactions after high-temperature annealing.
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 59 (1991), S. 2642-2644 
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The high-power integrity of strained single quantum well InGaAs/AlGaAs lasers grown by molecular beam epitaxy is investigated. In the high-power regime, the lifetime of the Lz=7 nm strained quantum well laser emitting at (approximately-equal-to) 980 nm is found to be limited by the air-cleaved facets. However, a comparison with lattice-matched 7 nm quantum well GaAs/AlGaAs lasers, which otherwise have an almost identical vertical structure shows a substantial lifetime improvement. This indicates that lattice hardening due to the indium in the quantum well is effective in the facet region. The investigations demonstrate the feasibility of 150 mW single mode operation with sufficient lifetime for practical applications in the wavelength range of (approximately-equal-to)1 μm.
    Type of Medium: Electronic Resource
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