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  • 1
    Electronic Resource
    Electronic Resource
    Nationality and Musicality used to test the Lamarckian Hypothesis (1971)
    [s.l.] : Nature Publishing Group
    Nature 230 (1971), S. 337-338 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] I have tried to test the assumption, accepted almost as an article of faith by the Welsh, that they have an above average talent for music. Many people believe that the Welsh language is more "musical" than the English, that Wales is a country steeped in music and musical traditions and that these ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/230337b0
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  • 2
    Electronic Resource
    Electronic Resource
    Deoxyribonucleic Acid in Plant Nucleoli (1964)
    [s.l.] : Nature Publishing Group
    Nature 204 (1964), S. 36-39 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] THE view that nucleoli contain ribonucleie acid (RNA) but no deoxyribonucleic acid (DNA) is based mainly on staining properties and the results of autoradiography. In general, nucleoli are Feulgen-negative although Feulgen-positive inclusions have occasionally been found in both plant1 and ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/204036a0
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  • 3
    Electronic Resource
    Electronic Resource
    Radiation Sensitivity and the Mitotic Cycle in Vicia Faba (1955)
    [s.l.] : Nature Publishing Group
    Nature 175 (1955), S. 890-891 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] THE sensitivity of living organisms to ionizing radiations can be assessed in terms of rapid morphological change, chromosome breakage and gene mutation. It is generally agreed that sensitivity varies not only between individuals but also between the tissues within individuals according to the ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/175890a0
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  • 4
    Electronic Resource
    Electronic Resource
    Action of Maleic Hydrazide on the Cell (1951)
    [s.l.] : Nature Publishing Group
    Nature 167 (1951), S. 407-408 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Since the action of maleic hydrazide is, like that of X-rays, specifically directed to growing tissues, and therefore mitotic cells, it seemed worth while to study its action on mitosis. Vicia Faba roots kept in tap water solutions above 0-0005 M concentration for twenty-four hours showed no ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/167407a0
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  • 5
    Electronic Resource
    Electronic Resource
    Comparative microphotometric studies of DNA and arginine in plant nuclei (1959)
    Springer
    Chromosoma 10 (1959), S. 686-710 
    Details
    ISSN: 1432-0886
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Photometric measurements have been made of the amounts of stain formed in the Feulgen (DNA) and Sakaguchi (arginine) reactions in plant nuclei of differing ploidy. In nuclei of diploid and tetraploid plants of Tradescantia ohioensis and of diploid, triploid and tetraploid plants of Ranunculus ficaria, both Feulgen and Sakaguchi values gave ratios which agreed closely with the ratios of the number of chromatids known to be present. The Feulgen/ Sakaguchi ratio for each of the different types of nuclei measured was very similar both within and between these two species. In the interphase nuclei of five different species, both Feulgen and Sakaguchi values gave bimodal distributions. In the nuclei of differentiating cells, the proportions of values falling into each of the 2C, 4C or 8C classes were the same for both stains. Measurements of the amounts of both stains were made in sequence on the same individual nuclei and a positive correlation found between the two sets of values. In nuclei from differentiating cells of Vicia faba primary roots, the Feulgen/Sakaguchi ratio decreased with increasing distance from the apex. The following suggestions were made from the results: (a) that there is some degree of quantitative constancy of nuclear arginine which parallels that of DNA; (b) that the amount of nuclear arginine, like that of DNA, is doubled during synthesis in interphase; (c) that the syntheses of DNA and arginine in interphase, if not simultaneous, at least occur within the same relatively short period; (d) that there may be a difference in the DNA/arginine ratio between the nuclei of meristematic and differentiating cells.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00396593
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  • 6
    Electronic Resource
    Electronic Resource
    Changes in the amounts of nuclear RNA during interphase in Vicia faba (1969)
    Springer
    Chromosoma 26 (1969), S. 312-325 
    Details
    ISSN: 1432-0886
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract Variations in the amounts of nuclear RNA present during interphase in Vicia faba were studied by microphotometric, autoradiographic and chemical methods. In one series of experiments, nucleic acid estimations were carried out on root meristem nuclei isolated from cells which had been partially synchronized by treatment with 5-aminouracil at 20 and 25° C. In a second series, root meristem nuclei isolated from untreated plants growing at 4, 20 and 25° C, were separated into fractions, containing different interphase stages, by sucrose density gradient centrifugation. — The results from the two series suggest that at 4 and 20° C there is a net increase in the amount of nuclear RNA during interphase which parallels the net increase in DNA. At 25° C, however, there is less RNA per nucleus and this remains at the same level throughout interphase resulting in an average increase in the DNA∶RNA ratio of 55%. — It is suggested that the balance between the synthesis and release of nuclear RNA may change not only within plants, at different stages of interphase, but also between plants according to the temperature at which they are grown.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00326525
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  • 7
    Electronic Resource
    Electronic Resource
    Changes in students in relation to college environments (1973)
    Springer
    Research in higher education 1 (1973), S. 245-262 
    Details
    ISSN: 1573-188X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Nature of Science, Research, Systems of Higher Education, Museum Science
    Notes: Abstract This study is organized as follows: first, students' attitudes to their college environments are measured, using a subjective scale; second, objective indices are calculated, using factual information such as size of college, qualifications of staff, etc.; third, the measured changes in students in variables such as academic achievement, educational attitudes, personality traits, values, practical teaching are related to the conditions of the environments in terms of the previous two scales (subjective and objective). The data analyzed relate to ten colleges of education. A complete sample (n=1,247) of the student intake was evaluated at the beginning and at the end of their three-year course. The two main predictors of change in students were found to be: (1) the college emphasis on science, and (2) the democratic structure of the college.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00991532
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  • 8
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    Comparative microphotometric studies of DNA and arginine in plant nuclei (1959)
    Springer
    Details
    Publication Date: 1959-01-01
    Print ISSN: 0009-5915
    Electronic ISSN: 1432-0886
    Topics: Biology , Medicine
    Published by Springer
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  • 9
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    Changes in the amounts of nuclear RNA during interphase in Vicia faba (1969)
    Springer
    Details
    Publication Date: 1969-01-01
    Print ISSN: 0009-5915
    Electronic ISSN: 1432-0886
    Topics: Biology , Medicine
    Published by Springer
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  • 10
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    The consequences of localised chromosome breakage (1954)
    Springer Nature
    Details
    Publication Date: 1954-12-01
    Print ISSN: 0018-067X
    Electronic ISSN: 1365-2540
    Topics: Biology
    Published by Springer Nature
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