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  • 1975-1979  (5)
  • 1915-1919
  • 78.70  (4)
  • Growth hormone  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Annihilation gamma-ray lineshape parameters (1977)
    Springer
    Applied physics 13 (1977), S. 365-369 
    Details
    ISSN: 1432-0630
    Keywords: 78.70
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract The S-parameter, introduced by MacKenzie et al., is now widely used to describe annihilation gamma-ray lineshapes recorded with Ge(Li) spectrometers. This paper discusses four descriptive parameters, their statistical properties and their sensitivity to positron trapping.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00882612
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Positron trapping and self-diffusion activation energies in chromium (1979)
    Springer
    Applied physics 19 (1979), S. 149-152 
    Details
    ISSN: 1432-0630
    Keywords: 78.70 ; 66.30 F
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract The activation energy for self-diffusion in chromium is found to be 3.51±0.13 eV from positron trapping measurements. The 4.51 eV activation energy seen in tracer diffusion work is therefore ascribed to divacancies, theQ 2/Q 1 ratio being typical of the bcc refractory group. The positron data give 0.55 for the ratioH 1v M /H 1v F of vacancy migration and formation energies, in agreement with quenching data for tungsten.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00932389
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Positron trapping in cobalt and trapping threshold temperature correlations (1979)
    Springer
    Applied physics 19 (1979), S. 269-273 
    Details
    ISSN: 1432-0630
    Keywords: 78.70
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract The monovacancy formation energy of Co is measured as 1.91 eV from a trapping model analysis of theT-dependence of the lineshape parameter. Previously discussed linear relationships between trapping threshold temperature and monovacancy parameters are refined; these relationships can now be regarded as well-established.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00900470
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Temperature dependence of positron annihilation in iron and vanadium (1978)
    Springer
    Applied physics 16 (1978), S. 29-34 
    Details
    ISSN: 1432-0630
    Keywords: 78.70
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract The Doppler broadened lineshape is measured as a function of temperature for iron and vanadium; vacancies produce a strong trapping effect in γ-Fe, but a weak effect in V. Threshold temperaturesT t for trapping are 1280±25 and 1370±30 K. Empirical linear relationships betweenT t , self-diffusion energyQ SD and monovacancy formation energyH 1v F are discussed and used to determineH 1v F values for γ-Fe and V.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00931417
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Somatotrophic diabetes: Insulin release responses to arginine and glucagon in dogs (1978)
    Springer
    Diabetologia 15 (1978), S. 205-212 
    Details
    ISSN: 1432-0428
    Keywords: Growth hormone ; somatotrophic diabetes ; diabetes ; glucagon ; arginine ; serum insulin ; immunoreactive insulin ; hyperinsulinaemia ; insulin secretion ; insulin-secretory responses ; augmentation of insulin secretion
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Growth hormone injected daily in 6 dogs for 6 days caused a 20-fold elevation in fasting serum immunoreactive insulin (IRI) without appreciable change in serum glucose in 1 day. In the somatotrophic diabetes that occurred after 2 days, the hyperinsulinaemia was maintained and the serum IRI/glucose (I/G) ratio declined from the early high level but remained elevated. During this treatment, in response to glucose infusion, the rise in serum IRI above the initially high fasting level was 16 times the normal. In response to glucagon, the rise in IRI was twice the normal and the rise in glucose was more prolonged, resulting in a decline in the I/G ratio. In response to arginine infusion, the rise in serum IRI was 8 times the normal and the rise in the I/G ratio was twice normal. Following a meal, the rise in serum IRI was 8 times the normal. Thus, with growth hormone treatment the insulin secretory responses to these stimulating factors were magnified over the already elevated fasting level of secretion. The insulin content of the pancreas was reduced to less than 10% of normal by growth hormone treatment for 6 days, due apparently to elevation of the rate of secretion over the rate of formation of insulin.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00421240
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    Paper (German National Licenses)
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