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  • 1960-1964  (5)
  • 1
    Electronic Resource
    Electronic Resource
    Cambridge : Cambridge University Press
    The @British journal for the history of science 1 (1963), S. 382-384 
    ISSN: 0007-0874
    Source: Cambridge Journals Digital Archives
    Topics: History , Natural Sciences in General
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Cambridge : Cambridge University Press
    The @British journal for the history of science 2 (1964), S. 162-164 
    ISSN: 0007-0874
    Source: Cambridge Journals Digital Archives
    Topics: History , Natural Sciences in General
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Cambridge : Cambridge University Press
    The @British journal for the history of science 2 (1964), S. 45-58 
    ISSN: 0007-0874
    Source: Cambridge Journals Digital Archives
    Topics: History , Natural Sciences in General
    Notes: SummaryIn 1661 Gerard Kinckhuysen published at Haerlem an introduction to algebra written in Dutch. Because of the clarity and compactness of its presentation it was considered suitable for dissemination to a wider class of readers than those able to read Low Dutch. Nicolaus Mercator, a wellknown mathematician of German origin, who had come to England as a young man in the later 1650s, was asked by Lord Brouncker to prepare a Latin translation of it. To this Isaac Newton, at the request of Isaac Barrow and John Collins, added explanatory notes and comments, and the manuscript was sent to Collins in London on 11 July 1670. Newton's draft, though still unpublished, is preserved, but Mercator's original translation was believed to have been lost. Only recently I rediscovered it in the Bodleian in a bound volume deriving from the estate of the Oxford mathematician John Wallis, which contains several books and pamphlets once in his possession.This article is divided into four sections:I. A survey of Kinckhuysen's Algebra ofte Stel-konst.II. A summary of Newton's notes and additions to it.III. An account of the unsuccessful efforts of Collins and Newton to publish the Mercator translation, enlarged with Newton's comments—this is abstracted from Collins' correspondence with Newton, Wallis and Gregory.IV. A description of the volume now in the Bodleian Library, press-marked ‘Savile G. 20’, which has Mercator's translation interleaved with the printed Dutch original and bound with other books once owned by Wallis.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Journal of molecular medicine 42 (1964), S. 463-467 
    ISSN: 1432-1440
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary Two current hypotheses on the mechanism of action of ACTH are reviewed: 1. The content of cyclic 3′,5′-adenosine monophosphate of the adrenals is increased by ACTH, and cyclic AMP or ACTH enhance corticoid synthesis. However, stimulation of corticoid synthesis presumably is not mediated by activation of adrenal phosphorylase. 2. Experiments dealing with the biochemical mechanism of the stimulation of adrenal protein synthesis are reviewed. The integrity of the adrenal protein synthesis appears to be necessary for the enhancement of corticoid synthesis by ACTH.
    Notes: Zusammenfassung Es wird eine Übersicht über zwei Hypothesen und die dazugehörigen Befunde zum Wirkungsmechanismus des adrenocorticotropen Hormons gegeben: 1. Der Gehalt der Nebenniere an cyclischem Adenosinmonophosphat wird durch ACTH erhöht, die stimulierende Wirkung des Hormons auf die Corticoidsynthese wird durch cyclisches Adenosinmonophosphat imitiert. Die Beschleunigung der Corticoidsynthese dürfte allerdings nicht durch eine Aktivierung der Phosphorylase in der Nebenniere erfolgen. 2. Befunde zum biochemischen Mechanismus der Stimulation der Proteinsynthese in der Nebenniere durch ACTH werden referiert. Die Intaktheit der Proteinsynthese der Nebenniere scheint für den steroidogenen Effekt des ACTH Voraussetzung zu sein.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Journal of cancer research and clinical oncology 63 (1960), S. 547-557 
    ISSN: 1432-1335
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary Under the influence of the carcinostatic agent Bayer A-139, an ethyleneiminoquinone, the concentration of DPN in glycolysing ascites tumor cells diminishes before the inhibition of the glycolysis appears and the concentration of ATP decreases. According to this the lack of ATP can not be the cause of the drop in the concentration of DPN. DPNase from beef spleen and from ascites tumor cells, DPN-pyrophosphorylase from hog liver, DPN-pyrophosphatase from the Jensensarcoma and DPNH2-pyrophosphatase from rat kidney and from the Jensensarcoma are influenced either not at all or only very little by the ethylene-iminequinone. From the experiments it may be concluded, that carcinostatic ethyleneimine-compounds inhibit a step in the reaction of the biosynthesis of DPN between nicotinamide, or nicotinic acid and nicotinamide-mononucleotide or nicotinic acid-mononucleotide.
    Notes: Zusammenfassung Nach Einwirkung der carcinostatischen Äthyleniminchinon-Verbindung A 139 auf glykolysierende Ascites-Tumorzellen sinkt der DPN-Gehalt, bevor die Glykolysehemmung eintritt und der ATP-Gehalt absinkt. Ein Mangel an ATP kann demnach nicht die Ursache für das Abfallen des DPN-Gehaltes sein. DPNase aus Rindermilz und aus Ascites-Tumorzellen, DPN-Pyrophosphorylase aus Schweineleber, DPN-Pyrophosphatase aus Jensen-Sarkom und DPNH2-Pyrophosphatase aus Rattenniere und Jensen-Sarkom werden durch die Äthyleniminchinon-Verbindung A 139 nicht oder nur sehr gering in ihrer Aktivität beeinflußt. Die vorliegenden Versuche sprechen dafür, daß carcinostatische Äthylenimin-Verbindungen einen Reaktionsschritt der Biosynthese von DPN zwischen Nicotinsäureamid bzw. Nicotinsäure und Nicotinsäureamid-mononucleotid bzw. Nicotinsäure-mononucleotid hemmen.
    Type of Medium: Electronic Resource
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