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  • 1
    Electronic Resource
    Electronic Resource
    Respiratory metabolism during embryonic subitaneous and diapause development in Pontella mediterranea (Crustacea, Copepoda) (1996)
    Springer
    Journal of comparative physiology 166 (1996), S. 157-163 
    Details
    ISSN: 1432-136X
    Keywords: Embryonic development ; Diapause ; O2 consumption ; ATP ; Copepod ; Pontella mediterranea
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract Oxygen consumption and ATP content are reported for the planktonic marine copepod Pontella mediterranea during normal and diapause embryonic development. In subitaneous embryos that hatched without delay within 48 h, O2 uptake increased linearly after spawning to reach maximum levels about 25 h later. By contrast, ATP levels were initially very high but decreased rapidly within the next 5 h to reach stable values thereafter. In diapause embryos, O2 consumption followed the typical U-shaped curve described for insect diapause. An initial period of prediapause, which lasted for about 25 days, was characterized by elevated O2 uptake. This was followed by a period of diapause in which O2 consumption dropped to 25% of the values recorded during prediapause. This protracted period of dormancy, which lasted about 4 to 5 months, was followed by a period of high O2 consumption possibly due to the breaking of diapause and resumption in development. ATP content during the pre-diapause period showed a similar trend as in subitaneous embryos with high initial levels that decreased with time for the first 20 days and remained stable afterwards.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00263978
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  • 2
    Electronic Resource
    Electronic Resource
    Melting behavior of a natural rubber network under stress (1973)
    New York : Wiley-Blackwell
    Journal of Polymer Science: Polymer Physics Edition 11 (1973), S. 2291-2295 
    Details
    ISSN: 0098-1273
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1973.180111118
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Analysis of stress-induced crystallization in high-cis-1,4-polybutadiene (1985)
    New York : Wiley-Blackwell
    Journal of Polymer Science: Polymer Physics Edition 23 (1985), S. 2109-2118 
    Details
    ISSN: 0098-1273
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Stress-induced crystallization of a crosslinked polybutadiene with a high 1,4-cis content is investigated, at room temperature. The change in the fraction of crystallinity with deformation is evaluated by two different methods. The first is based on simultaneous measurement of birefringence and stress. The second is based on calorimetric analysis. The data on crystallinity obtained by these two methods are in good agreement in the range of low deformations, while, in the range of higher deformation (λ 〉 5), the degree of crystallinity obtained by calorimetry is higher than that obtained by the optical method. Qualitative information on the crystallization was also obtained by optical analysis of the hysteresis behavior. The hysteresis data show the presence of ordering phenomena at deformations at which there seems to be no crystallinity according to both quantitative methods.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1985.180231009
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  • 4
    Electronic Resource
    Electronic Resource
    Optical and calorimetric analysis of stress-induced crystallization in natural rubber networksCorrected proofs received July 14, 1982 (1982)
    New York : Wiley-Blackwell
    Journal of Polymer Science: Polymer Physics Edition 20 (1982), S. 1525-1531 
    Details
    ISSN: 0098-1273
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Stress-induced crystallization of natural rubber networks is studied. The analysis is carried out using two different experimental techniques and the results are compared. In particular, the microcalorimetric and photoelastic results seem to be in disagreement, but the disagreement can be resolved by assuming that organization phenomena take place even at strains less than the critical value at which thermally detectable crystallization occurs. It is believed that such organization phenomena give rise to highly defective crystallites which behave as nucleation agents in the crystallization process that is induced at larger strains.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1982.180200902
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    Paper (German National Licenses)
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