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  • Springer  (120)
  • American Physical Society  (31)
  • Ovid Technologies
  • 1970-1974  (85)
  • 1965-1969  (70)
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    The European physical journal 224 (1969), S. 135-143 
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A selftarget of deuterium (0.5 atomic-% D) in a single copper crystal is produced by a 75 keV deuteron beam. The neutron yield from the D(d, n) 3He reaction shows a 30% increase compared with the yield in polycrystalline copper, if the crystal is oriented in 〈110〉 to the beam. This result is discussed in terms of the channelling behaviour of the penetrating deuterons parallel to the 110 lattice rows.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Zusammenfassung Nachweis, dass im menschlichen Hoden sowohl das Interstitium wie auch das tubuläre System befähigt sind, Androstendion-4-14C und Testosteron-7α-3H zu konvertieren.
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Cellular and molecular life sciences 25 (1969), S. 837-841 
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Zusammenfassung Demonstrationsvergleich röntgenmikroskopisch behandelter Zellen und Blutgefässe von Ratten sowie von menschlichem Gehirngewebe mit optischen Standardmethoden, wobei Gomoris Bleisulfidtechnik zur Bestimmung der Phosphataseenzymaktivität angewandt wurde. Die Brauchbarkeit der histochemischen Technik für die Röntgenologie wird diskutiert.
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Cellular and molecular life sciences 30 (1974), S. 257-258 
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Résumé Les nerfs cholinergiques vasodilatateurs de l'artère utérine du cobaye ont leur origine dans les ganglions paracervicaux. L'ablation de ces ganglions permit d'évaluer l'importance des nerfs vasodilatateurs dans le cas d'une hyperémie de l'uterus apparaissant durant la grossesse.
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Cellular and molecular life sciences 30 (1974), S. 1045-1045 
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Résumé La perméabilité à l'albumine des vaisseaux capillaires fut caractérisée par le produit PS deRenkin. Cette mesure fut obtenue par une analyse dynamique de la quantité d'albumine contenue dans les interstices de la zone corticale du rein.
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Cellular and molecular life sciences 29 (1973), S. 1522-1524 
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Zusammenfassung Nachweis, dass vollkoordinierte zweiwertige Kupfer- und Nickelchelate des 3,4,7,8-Tetramethyl-1,10-phenanthrolins Muskelkraft, wie auch Kontraktionsgeschwindigkeit des isolierten Meerschweinchen Atriums, sowie H3-Noradrenalin- und Metabolitenausfluss vermehren. Die durch Chelate veranlasste Senkung des Noradrenalins konnte durch Fluoreszenz-Histochemie bestätigt werden.
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Entomologia experimentalis et applicata 10 (1967), S. 263-269 
    ISSN: 1570-7458
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Zusammenfassung Eine Reihe symmetrisch dreifach substituierter Phosphorverbindungen wurde als Synergisten für Malathion und gewisse andere Organophosphat-Insektizide gegenüber resistenten und normalen Stämmen von Chrysomya putoria und Musca domestica geprüft. Alle diese Verbindungen verstärkten die Insektizide gegen resistente Stämme wirkungsvoller als gegen normale. Das galt besonders für Malathion, vor allem bei dem C. putoria-Stamm, dessen Resistenz gegenüber Malathion hoch spezifisch ist. Ein 5:1-Gemisch der besten Synergisten hob seine Resistenz praktisch auf. Unter den geprüften “Synergisten” waren die zwei besten C. putoria und den beiden verschiedenen resistenten Stämmen von M. domestica gemeinsam; diese beiden Synergisten wirkten auch gegenüber Culex tarsalis-Larven ausgezeichnet, wie andere Autoren berichteten. Neben der synergistischen Wirksamkeit für Malathion reduzierten die besseren Verbindungen auch die Resistenz anderer Phosphor-Insektizide (Dicapthon, Parathion, Coumaphos), wenn auch nicht ganz so vollkommen. Es wird geschlossen, daß ihre Wirkungsweise für die Unterdrückung der Carboxyesterase-Entgiftung nicht ganz spezifisch ist.
    Notes: Abstract A series of symmetrical trisubstituted phosphorus compounds was tested as synergists for malathion and certain other organophosphorus insecticides against resistant and normal strains of Chrysomya putoria and Musca domestica. All the compounds synergised the insecticides more effectively against resistant than normal strains. This was especially true with malathion, notably with the C. putoria strain the resistance of which is highly specific for malathion. A 5:1 mixture of the best synergists virtually abolished its resistance. Among the “synergists” tested, the two best were common to the C. putoria and the two different resistant strains of M. domestica; these two synergists were also outstanding against Culex tarsalis larvae, as reported by other authors. In addition to the synergistic action on malathion, the better compounds were also effective in reducing resistance to other phosphorus insecticides (Dicapthon, parathion, coumaphos) though not quite so effectively. It is concluded that their action is not entirely specific for suppressing carboxyesterase detoxication.
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  • 8
    Electronic Resource
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    Springer
    Bulletin of mathematical biology 32 (1970), S. 475-483 
    ISSN: 1522-9602
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Mathematics
    Notes: Abstract A population of initially synchronized cells is considered wherein each cell grows according to a dispersionless growth law and the probability of cell division is determined by cell age. The first and second moments of the distribution of birth volumes are considered as functions of time and it is shown that it is impossible for both moments to approach finite, nonzero limits ast→∞. This implies that the volume distribution of the population will not approach a limiting distribution on any finite, nonzero volume interval and that the population will not attain balanced exponential growth. An illustrative example is worked out in detail. The distribution of birth volumes is also analyzed as a function of generation number and it is found that the logarithm of the birth volume in thejth generation is normally distributed asj→∞, with an unbounded variance. Generalizations and implications of these results are briefly discussed.
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  • 9
    Electronic Resource
    Electronic Resource
    Springer
    Naturwissenschaften 53 (1966), S. 232-232 
    ISSN: 1432-1904
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Springer
    Archive for mathematical logic 15 (1972), S. 74-78 
    ISSN: 1432-0665
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Type of Medium: Electronic Resource
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