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  • 1
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 136 (1935), S. 551-551 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] IN looking at a near object, the eyes are turned inwards. Therefore to procure a really natural stereoscopic view of two photographs of a near object, the eyes should be turned inwards at the same angle. To achieve this, the two photographs should be mounted in such a way that the corresponding ...
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  • 2
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 137 (1936), S. 236-236 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] THE work of W. Ostwald1 showed that the electrolytic dissociation constants of the hydroxybenzoic acids vary greatly with the positions of the hydroxyl groups. Thus the dissociation constants of benzoic acid, and of those mono-, di- and tri-hydroxybenzoic acids, which do not ...
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  • 3
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 143 (1939), S. 522-523 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] WAKSMAN1 has recently demonstrated, by cultural methods, the important role of fungi and actinomycetes in the breakdown of plant tissues in composts and dunghills. The details of the process, however, were not directly observed. I have previously2,3 described ...
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  • 4
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 143 (1939), S. 477-477 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] WHEN announcing in 1932l that the reproduction of a mammal (Microtus) could be controlled by the duration of artificial illumination, R. M. Ranson and I published a statement that lights were used in poultry-houses in Spain more than a century ago for the purpose of increasing ...
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  • 5
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 141 (1938), S. 877-878 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] THE process of cellulose digestion in herbivora, in addition to its economic importance, throws considerable light on a number of cognate biological topics. Biochemical aspects of the problem have received considerable attention. Pure cultural investigations have been attempted though it is ...
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  • 6
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 140 (1937), S. 890-891 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] ONE frequently hears it said that the swallow passes the winter in South Africa, though a moment's reflection shows that it is summer in South Africa when the swallow is there. There appear to be no words for times of year, longer than a calendar month, applying to the whole world. Again, when ...
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  • 7
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 137 (1936), S. 111-112 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] I NOTE with great interest that experimental work is being done to investigate the effect of visible rays on bacterial growth. During a course of lectures I gave at the Royal Institution in 1911, I showed specimens of B. prodigiosus which I had subcultivated for several generations in a narrow ...
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  • 8
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 136 (1935), S. 193-193 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] IT is sometimes stated that in the stereoscopic photography of near objects it makes no difference at all to the images whether the cameras are placed parallel to one another, or convergent upon the object. In Fig. 1 the object to be photographed has three distinct points upon it, A, B and C. The ...
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  • 9
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 143 (1939), S. 900-901 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] PRIMETIN, C15H10O4, isolated from the leaves of Primula modesta1, has hitherto been regarded as 5: 6-dihydroxyflavone (1), and several attempts have been made to prepare this compound2. An unambiguous synthesis of 5: ...
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  • 10
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 144 (1939), S. 865-865 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] o-HYDROXYisoPROPENYL compounds, for example (1), readily polymerize to dimeric forms on long standing or on treatment with hydrogen chloride1. These dimerides can be distilled under diminished pressure and are generally resinous at ordinary temperature, but they yield well ...
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