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  • 1
    Electronic Resource
    Electronic Resource
    Use of the Centrifuge in Determining the Density of Small Crystals (1934)
    [s.l.] : Nature Publishing Group
    Nature 134 (1934), S. 809-810 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] THE accurate measurement of crystal density has recently acquired increased importance, since it is necessary to know this quantity in order to use X-ray methods for determining the molecular weights of unknown chemical substances. But the usual crystallographic methods of density measurement, ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/134809b0
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  • 2
    Electronic Resource
    Electronic Resource
    X-Ray Photographs of Crystalline Pepsin (1934)
    [s.l.] : Nature Publishing Group
    Nature 133 (1934), S. 794-795 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] FOUR weeks ago, Dr. G. Millikan brought us some crystals of pepsin prepared by Dr. Philpot in the laboratory of Prof. The Svedberg, Uppsala. They are in the form of perfect hexagonal bipyramids up to 2 mm. in length, of axial ratio c/a = 2.3 ± 0.1. When examined in their mother liquor, they ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/133794b0
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  • 3
    Electronic Resource
    Electronic Resource
    A New Trio1 from the Urine of Pregnant Mares (1933)
    [s.l.] : Nature Publishing Group
    Nature 132 (1933), S. 102-102 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] RECENTLY, Dr. André Girard very kindly placed at our disposal a large quantity of an extract of the urine of pregnant mares from which the keto-hydroxyœstrin had been previously removed. Attempts to isolate from the neutral fraction of this extract, the sterol degradation product pregnandiol, ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/132102a0
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  • 4
    Electronic Resource
    Electronic Resource
    Crystal Structure of Vitamin B 1 and of Adenine Hydrochloride (1933)
    [s.l.] : Nature Publishing Group
    Nature 131 (1933), S. 911-912 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] CRYSTALS of vitamin B1 (hydrochloride) from various sources have been examined. All have been found to be substantially identical in form and X-ray patterns. A very slight difference in optical properties may, however, point to the existence of a variable amount of impurity in solid ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/131911b0
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  • 5
    Electronic Resource
    Electronic Resource
    Absorption Spectrum of Vitamin A at Low Temperatures (1933)
    [s.l.] : Nature Publishing Group
    Nature 131 (1933), S. 582-583 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] WE have been trying to devise more precise physical criteria for the recognition of biologically important molecules. Obviously, the only ultimate test for such a molecule is its action on living organisms. Physical tests can, however, be used as a guide to decide whether it is worth while to ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/131582c0
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  • 6
    Electronic Resource
    Electronic Resource
    Growth in Muscle (1933)
    [s.l.] : Nature Publishing Group
    Nature 132 (1933), S. 172-172 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] IN the growth of the eye muscles of plaice, I have made an observation which may concern the general problem of muscular development. When transverse sections were taken of the head of a young plaice 4 cm. long, its internal rectus was seen to consist of 42 distinct fibres. Similar sections ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/132172a0
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  • 7
    Electronic Resource
    Electronic Resource
    The Expanding Universe (1932)
    [s.l.] : Nature Publishing Group
    Nature 130 (1932), S. 507-508 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] IN NATURE of July 2, Prof. Milne has published a very simple and attractive explanation of the phenomenon that has given rise to so much speculation among recent cosmogonists. The sole defect in his clear analysis is that the material particles that form the universe are taken initially to have ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/130507b0
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  • 8
    Electronic Resource
    Electronic Resource
    Longevity of Seeds (1934)
    [s.l.] : Nature Publishing Group
    Nature 134 (1934), S. 932-933 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] THE question of the longevity of buried seeds is always recurring, as. witness the recent revival of the fable of ‘mummy wheat’. There is abundant evidence that the embryo of the wheat grain perishes relatively soon, in ten years or less under ordinary conditions. Respiration goes on until the ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/134932b0
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  • 9
    Electronic Resource
    Electronic Resource
    Inhibitors of Catalase Reaction (1934)
    [s.l.] : Nature Publishing Group
    Nature 134 (1934), S. 933-933 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] IT is well known that the activity of catalase is greatly inhibited by very small concentrations of potassium cyanide, hydrogen sulphide and especially hydroxylamine. To these reagents we can now add sodium azide (NaN3) which also acts as a strong inhibitor of catalase. In a ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/134933b0
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  • 10
    Electronic Resource
    Electronic Resource
    Corrections to the Refractive Indices of Quartz in the Infra-Red (1934)
    [s.l.] : Nature Publishing Group
    Nature 134 (1934), S. 937-937 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] IN the region 3–4 μ, the dispersive power of crystal line quartz (ordinary ray) is about four times that of fluorite and thirteen to fourteen times that of rock-salt, but, because of strong absorption beyond 3.6 μ and also between 2.8 μ and 3.1 μ, quartz has been neglected as a prism material ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/134937b0
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