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  • Springer  (69)
  • BioMed Central
  • Copernicus
  • PANGAEA
  • Springer Science + Business Media
  • 1945-1949  (69)
  • 1
    Electronic Resource
    Electronic Resource
    Eine Bestimmung der Bindungsenergie des Deuteriumkernes und der Neutronenmasse aus dem Kernphotoeffekt am Deuterium (1949)
    Springer
    The European physical journal 126 (1949), S. 336-343 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Zusammenfassung Es wird die Bindungsenergie des Deuteriumkernes und damit die Masse des Neutrons neu gemessen. Ein mit Deuterium gefülltes Proportionalzählrohr wird denγ-Quanten eines Radiothorpräparates ausgesetzt (Energie 2,620 MeV) und die Energie der durch den (γ, n)-Prozeß entstehenden Protonen ausgemessen. Zur Eichung des Proportionalzählrohres werden diejenigen Elektronen verwendet, die ein α-Teilchen auf einem bekannten Wegstück aus der Mitte seiner Bahn erzeugt. Es ergab sich die Protonenenergie zu 216,8 keV ± 1% und damit die Bindungsenergie des Deuterons zu (2,186 ± 0,005) MeV. Mit den derzeit besten Werten für die Massendifferenz $$\left( {M_{H_2 } - M_D } \right)$$ und für die Protonenmasse, findet man mit dem obigen Wert der Bindungsenergie die Neutronenmasse zu (1,008939 ± 0,0000066) Masseneinheiten.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01330878
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  • 2
    Electronic Resource
    Electronic Resource
    Über einige Demonstrationsversuche mit elektromagnetischen Zentimeter-Vellen (1949)
    Springer
    The European physical journal 126 (1949), S. 711-720 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Zusammenfassung Die moderne Entwicklung der elektrischen Zentimeterwellenröhren gestattet, Versuche über die Ausbreitung elektromagnetischer Wellen mit einfachen Mitteln in einem Hörsaal vorzuführen. Nachstehend werden einige Experimente beschrieben, wie sie im Rahmen einer Vorlesung über „Physikalische Grundlagen der Hochfrequenztechnik“ im Hörsaal des III. Physikalischen Instituts der Universität Göttingen (Größe 12 × 6 × 5 m3) gezeigt wurden 1. Die Zusammenstellung erhebt selbstverständlich keinen Anspruch auf Vollständigkeit, auch sind die einzelnen Versuche im Prinzip keineswegs neu; es wurde jedoch Wert auf Einfachheit und Anschaulichkeit gelegt.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01328788
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  • 3
    Electronic Resource
    Electronic Resource
    Zur Hyperfeinstruktur des WI-Spektrums (1948)
    Springer
    The European physical journal 124 (1948), S. 685-690 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Zusammenfassung Es wurde die Hyperfeinstruktur von 19 Linien des WI-Spektrums analysiert und festgestellt, daß die Drehimpulsquantenzahl des W 183-Kerns den Wert I=1/2 hat. Die magnetische Aufspaltung der untersuchten Terme ist extrem klein. Der Wert der Isotopieverschiebung im Grundmultiplett 5 d4 6 s2 5D bezogen auf 5d5 6s 7S3 beträgt für das Paar W 183 — W 184 Δ ν=0,073 cm−1. Die Verschiebung zwischen W 184 und W 186 ist 10% kleiner. Die Isotopenlage ist normal.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01668902
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  • 4
    Electronic Resource
    Electronic Resource
    L'isolement de l'α-amylase de pancréas (1946)
    Springer
    Cellular and molecular life sciences 2 (1946), S. 362-363 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The α-amylase of hog pancreas has been purified and the degree of purity controled by electrophoresis. The active substance is a protein which can dissociate in an unstable high molecular component and a thermostable component of low molecular weight.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02163939
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  • 5
    Electronic Resource
    Electronic Resource
    Contribution à l'étude de l'acide chondroïtine-sulfurique (1946)
    Springer
    Cellular and molecular life sciences 2 (1946), S. 311-312 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary It is found that chondroitinsulfuric acid is composed of unbranched chain-molecules containing rests of glucuronic acid and N-acetyl-galactosamine-6-sulfate combined in one of the following manners (a) or (b):
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02157053
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  • 6
    Electronic Resource
    Electronic Resource
    Les propriétés mécaniques du caoutchouc (1946)
    Springer
    Cellular and molecular life sciences 2 (1946), S. 117-126 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary A survey of recent work on the theories of the peculiar mechanical behaviour of substances with rubber-like properties is given. All the theories are based on the assumption that these substances (including rubber itself) are composed of very long, flexible chainmolecules. Any segment of a chain is linked to two neighbouring segments by bonds similar to those which are present in typical solids and to all other neighbours by linkages like the bonds prevailing between the particles of liquids. The chain molecules are intermingled so as to form a kind of a felt. This state of aggregation is intermediate between the solid and the liquid; it is called the rubber-like state (état gommoïdal). Elasticity, viscosity and plastic flow as well as the influence of crystallization, vulcanization and degradation are discussed in terms of this theory.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02163915
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  • 7
    Electronic Resource
    Electronic Resource
    Zum Problem des Stoffwechsels der Brenztraubensäurein vivo (1948)
    Springer
    Cellular and molecular life sciences 4 (1948), S. 31-31 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Following intravenous injection of pyruvic acid (PA) in the form of the sodium salt in the normal rabbit the level of PA in the blood rises, falling again to the initial level after 60 minutes. In the case of the alloxandiabetic animal the elimination of PA administered in equal doses is markedly retarded. If animals are used that suffer from a progredient alloxan diabetes leading to death in coma, an increased endogenous hyperpyruviæmia can be demonstrated. Insulin plays no part in the regulation of PA metabolism; through the application of aneurin, however, one succeeds in enabling the organism to make use of PA. A separate report will deal with the complex relations holding in endogenous hyperpyruviæmia in coma.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02164291
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  • 8
    Electronic Resource
    Electronic Resource
    Zum Problem des Stoffwechsels der Brenztraubensäurein vivo (1948)
    Springer
    Cellular and molecular life sciences 4 (1948), S. 195-196 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary In the end-stage of progressive alloxan diabetes of the rabbit we have been able to overcome the acute pyruvic acidosis by the use of phosphorylated vitamin B1 (cocarboxylase) together with vitamin B2, while it is impossible to cure the endogen hyperpyruviæmia with simple vitamin B1. The superiority of the coferment over the vitamin, which is only effective at the beginning of the decompensation, implies the existence of a disturbance in the phosphorylation during the crisis of diabetic metabolism. We have been successful in preventing the inevitable death in coma of diabetic rabbits by doses of cocarboxylase + riboflavin, and we were able to keep them alive by continuous doses of insulin together with vitamin B1 and B2.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02153878
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  • 9
    Electronic Resource
    Electronic Resource
    Purification et cristallisation de 1'α-amylase de bactérie (1947)
    Springer
    Cellular and molecular life sciences 3 (1947), S. 411-412 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The purification and crystallization of bacterial α-amylase are described. It is not identical with pancreas α-amylase, but its action on starch is the same.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02156364
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  • 10
    Electronic Resource
    Electronic Resource
    Purification et cristallisation de l'α-amylase de salive (1947)
    Springer
    Cellular and molecular life sciences 3 (1947), S. 455-455 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The crystallization and recrystallization of human salivary α-amylase are described.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02148809
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