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  • 1975-1979  (11)
  • 1
    Electronic Resource
    Electronic Resource
    Palo Alto, Calif. : Annual Reviews
    Annual Review of Materials Research 9 (1979), S. 191-217 
    ISSN: 0084-6600
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Copenhagen : International Union of Crystallography (IUCr)
    Acta crystallographica 32 (1976), S. 2230-2231 
    ISSN: 1600-5740
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 267 (1977), S. 236-237 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Fig. 1 Cyclone tracking by radar fixes of storm in Arabian Sea 30 May-3 June 1976, showing position of drilling rigs. During the period 31 May-3 June, 1976, a cyclonic storm passed over Arabian Sea. On 2 June it reached hurricane stage and passed through Bombay High Area where offshore oil ...
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Chromosoma 53 (1975), S. 91-105 
    ISSN: 1432-0886
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract 3H-thymidine and 3H-uridine labeling patterns of the X-chromosome arms of Drosophila pseudoobscura have been examined autoradiographically. Results show that in all phases of replication, namely, initial, middle and terminal, both arms of the X-chromosome in the male are advanced by one or two steps of 3H-thymidine labeling in comparison with the autosomes, and both arms in the female show more or less similar labeling profile as the autosomes. Both the arms in the male show pale stainability and enlarged width ratio, as reported in other species. The 3H-uridine labeling patterns also reveal that both arms in the male incorporate twice as much precursor as the individual X in the female. Results, therefore, suggest that both arms of the X in D. pseudoobscura are faster replicating and hyperactive in the male, although it is considered that XL is homologous to the X and XR to part of the third chromosome of D. melanogaster.
    Type of Medium: Electronic Resource
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  • 5
    ISSN: 1432-0886
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract Analysis of 3H-thymidine autoradiograms of late third instar larval salivary glands of Drosophila pseudoobscura revealed a unique example of asynchrony of replication in the autosome complement. The two autosomal arms, 2 and 3, show similar labeling pattern during the initial phases, DD to 3C, and thereafter, the chromosome 3 has fewer labeled sites than chromosome 2 until the most terminal pattern, 1D. Detailed sitewise analysis of 3H-thymidine labeling shows that while nearly 54% of the sites examined in chromosome 2 have a labeling frequency greater than 50%, only 13% of all sites in chromosome 3 have labeling frequency at that range. The number of labeled sites on chromosome 3 plotted against that on chromosome 2 shows a hyperbolic profile rather than a linear relationship. The silver grain ratio of the 2nd to 3rd increases from 1.5 to 3.1 through different stages of the cycle. These results suggest that both chromosomes start replication simultaneously but the third chromosome appears to complete the replication earlier than the second. These data open up the possibility of separate control mechanisms for the initiation and termination of DNA replication in polytene chromosomes.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Histochemistry and cell biology 52 (1977), S. 73-84 
    ISSN: 1432-119X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary A rapid method of autoradiography using the scintillation cocktail (Toluene and scintillation fluid, Omnifluor) has been described earlier. Its application and efficiency have been tested using both 3H-thymidine and 3H-uridine. The optimum time required for processing the autoradiograms has been found to be 24 h dry exposure followed by 48 h in the scintillation mixture. Detailed analysis of the autoradiograms with 3H-uridine reveals that with the rapid method the 100% level of labelling index is reached by 48 h while with the conventional method the same level is reached by 10 to 12 days of dry exposure. The maximum grain density is reached by 16 to 17 days by the conventional method. While by the rapid method, the maximum grain density is approximately 80% of the control, this grain density is reached by 48 h (plus 24 h of dry exposure) and thereafter forms a plateau. With Toluene alone the grain density never exceeds 20%. The background is also relatively low and less variable in the O-T-processed autoradiograms, as compared to the two controls. These results support that the scintillation fluid plays the key role in augmenting the labelling. Furthermore, although the maximum grain density by the rapid technique is 80% of the control, the grain density obtained by the rapid method gives less coincidence and superimposition of grains. On the other hand, with 3H-thymidine, although all labelling patterns could be resolved, the labelling index (i.e., percent of labelled cells) is about 40% at 48 h (plus 24 h) and about 79.5% at 96 h with the rapid method, as compared to about 30% and 44% with the conventional method at the two time points, respectively. Only with 16–17 days' dry exposure the 3H-thymidine labelling index increases to 67%. The frequency of the initial patterns (DD-2C) which are usually less frequent, has been found to have increased with the rapid method. No difference in grain density of labelling of 3H-thymidine could be detected between the rapid method and the conventional method. The resolution of grains also seems to be better by the rapid method, due probably to smaller size and lack of superimposition of grains. Other applications, advantages and limitations have been discussed.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Colloid & polymer science 256 (1978), S. 728-728 
    ISSN: 1435-1536
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
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  • 8
    ISSN: 1435-1536
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Springer
    International review of education 24 (1978), S. 518-521 
    ISSN: 1573-0638
    Source: Springer Online Journal Archives 1860-2000
    Topics: Education
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Springer
    Journal of materials science 12 (1977), S. 1666-1672 
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract The temperature and strain rate dependence of the flow stress of tantalum was studied between 78 to 800 K at strain rates from 10−5 to 2×104 sec−1. The effect of temperature and strain rate on the lower yield stress can be explained by a model incorporating the combined operation of the Peierls mechanism and dislocation drag processes. The general behaviour of the stress—strain curve at various strain rates and temperatures is analysed in terms of a rate—temperature parameter.
    Type of Medium: Electronic Resource
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