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  • 1
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Journal of the American Chemical Society 93 (1971), S. 2800-2801 
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Journal of the American Chemical Society 31 (1909), S. 35-43 
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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  • 3
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 174 (1954), S. 44-45 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The accurate biological testing of dip-washes is a difficult and lengthy process ; but recently Downing et al.1 have shown that loss of biological efficiency is accompanied by a corresponding diminution in the ratio gamma isomer/total benzene hexachloride. These workers used partition ...
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 192 (1961), S. 889-890 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] We planned to determine whether acceleration could be detected in the prophase of meiosis in anthers of Tradescantia paludosa, in which the prophase stages investigated (from pachytene and diplotene onwards) are of sufficient duration to do so. The anthers were cultured on a modification of the ...
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 210 (1966), S. 1368-1368 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Many methods used have been of doubtful accuracy and/or specificity at the levels of ethanol found, and the method of Curry, Walker and Simpson3 has been modified to study the problem. A Pye 104 gas-liquid chromatograph, fitted with a flame ionization detector and a PEG 400 on 'Celite' column, is ...
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Origins of life and evolution of the biospheres 5 (1974), S. 351-356 
    ISSN: 1573-0875
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Geosciences
    Notes: Abstract The genetic code has been analysed by a method similar to that used by Gregor Mendel. The current codon catalogue is shown to be symmetrically subdivisible into two discrete subcatalogues of eight quartets each by classifying the quartets asmonocoding (for one amino acid only) vsheterocoding (for two amino acids or for amino acid plus nonsense). The internal symmetries of the two subcatalogues are identical, and are governed by two common parity rules. These rules, together with one governing the subdivision itself, can be explained by the hypothesis that two primaeval sets of polynucleotide-borne anticodons, corresponding closely but not exactly with the subcatalogues originated independently and separately (were not originally together within any replicating pre-or proto-biont). The discorrespondence between the primaeval sets and the subcatalogues is itself symmetrical, involving quartets sharing identical locations in the two subcatalogues. The primaeval sets correspond exactly with the subdivisions of the catalogue proposed by Skoog and co-workers on the basis of the presence vs the absence of cytokinins or “cytokininlike bases” adjacent to the anticodons. A molecular model for the origin of the primaeval anticodon sets is described, and the relationship of the hypothesis with the origin of life, together with some possibilities for testing it, are discussed.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Journal of applied electrochemistry 16 (1986), S. 544-554 
    ISSN: 1572-8838
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Electrical Engineering, Measurement and Control Technology
    Notes: Abstract The interactions between chalcocite and ethylxanthate have been examined in an electrochemical-microflotation cell containing a particle-bed working electrode. Cyclic voltammetry has shown the formation of a chemisorbed product commencing at −0.5 V versus SCE with a bulk oxidation product, possibly cuprous xanthate, forming above −0.23 V. Relating the charge passed on a potentiostated mineral bed after addition of xanthate to spectrophotometric changes in xanthate concentration suggested the presence of a fast chemical reaction and a charge transfer reaction. The strong correlation between flotation response and potential indicates that chemisorption of ethylxanthate produces a layer sufficiently hydrophobic for chalcocite flotation.
    Type of Medium: Electronic Resource
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