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  • 1
    Electronic Resource
    Electronic Resource
    Alterations to the swimming performance of carp, Cyprinus carpio, as a result of temperature acclimation (1986)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of fish biology 29 (1986), S. 0 
    Details
    ISSN: 1095-8649
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Groups of common carp were acclimated to either 10°C or 28°C for 6 weeks. Fish were then exercised at 10°C or 20°C, and the critical swimming speed (fatigue velocity) was measured. At 10°C, cold-acclimated carp were capable of significantly higher swimming speeds. When exercised at 20°C. however, the situation was reversed, and warm-acclimated carp exhibited improved swimming ability. These results provide direct evidence that acclimation of the contractile proteins is beneficial across a wide temperature range. Following acclimation to low environmental temperatures the critical swimming speed exhibited a Q10 of only 1.1 for the temperature range 10–20°C. compared to a value of 2.9 for fish acclimated to the higher temperature.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1095-8649.1986.tb04990.x
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  • 2
    Electronic Resource
    Electronic Resource
    Consequences of thermal change on the myofibrillar ATPase of five freshwater teleosts (1985)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of fish biology 26 (1985), S. 0 
    Details
    ISSN: 1095-8649
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Myofibrillar ATPase activity was measured in the epaxial musculature of five freshwater species of fish acclimated to extremes of temperature within their tolerance ranges. Changes in the enzyme activity were apparent in carp, tench and roach, cold acclimated fish (10°C) having higher enzyme activity levels than hot acclimated fish (28°C). Such changes were not apparent in eels or brook trout. Alteration of the enzyme activity took less than 4 weeks, and was totally reversible. This suggests that seasonal adaptation to environmental temperatures is possible, thus maintaining locomotory efficiency.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1095-8649.1985.tb04313.x
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  • 3
    Electronic Resource
    Electronic Resource
    In-flight performance of the IUE (1978)
    [s.l.] : Nature Publishing Group
    Nature 275 (1978), S. 377-385 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] THE IUE was launched from the John F. Kennedy Space Center on 26 January 1978 into an eccentric geosynchronous orbit. The system is described in the previous article. The mission objectives required that the spacecraft be placed in a 24-hour orbit visible continuously from the NASA ground station ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/275377a0
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  • 4
    Electronic Resource
    Electronic Resource
    IUE observations of hot stars: HZ43, BD + 75°325, NGC6826, SS Cygni, η Carinae (1978)
    [s.l.] : Nature Publishing Group
    Nature 275 (1978), S. 385-388 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] THE IUE now provides the opportunity for major advances in the study of hot stars at UV wavelengths. The ability to detect faint sources now permits: (1) the study of hot, subluminous stars which as a group represent the avenues to the endpoints of evolution for the great majority of stars; (2) the ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/275385a0
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  • 5
    Electronic Resource
    Electronic Resource
    Ultraviolet detection of the nucleus of NGC2440 (1987)
    [s.l.] : Nature Publishing Group
    Nature 326 (1987), S. 571-573 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Figure 1 compares the stellar flux distribution adopted by Atherton et al (a black body at T = 350,000 K and V0= 17.9) with the underlying background flux computed (J. P. Harrington, personal communication) for the following nebular parameters3-5: log (F^o^-10.07, Te = 14,000 K, Ne = 3,000 cm~3, ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/326571a0
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  • 6
    Electronic Resource
    Electronic Resource
    Protein synthesis in tissues of fed and starved carp, acclimated to different temperatures (1988)
    Springer
    Fish physiology and biochemistry 4 (1988), S. 165-173 
    Details
    ISSN: 1573-5168
    Keywords: protein synthesis ; carp ; temperature acclimation ; starvation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The temperature dependence of the rates of protein synthesis in the red and white skeletal muscle of the carp (Cyprinus carpio) was measured using a method which involved a single injection of tritiated phenylalanine. Plasma and muscle-free phenylalanine quickly reached a plateau level at all temperatures. During the plateau phase the incorporation of label into protein was liner. Muscle from fish previously acclimated to either a low temperature (8°C) or a high temperature (28°C), showed marked differences in the rates of protein synthesis. The results show that cold acclimation is associated with significantly higher rates of protein synthesis (p〈0.001) in both red and white muscle. Arrhenius activation energies, derived from the rates of protein synthesis at the different experimental temperatures, were similar for both red and white muscle in fish acclimated to warm or cold temperatures. Measurements for both acclimated groups over the temperature range 8–34°C showed that the activation energy for the process of protein synthesis was 86.7 kJ/mol and 78.7 kJ/mol for the red and white muscle respectively.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01871743
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  • 7
    Electronic Resource
    Electronic Resource
    Contractile properties of goldfish fin muscles following temperature acclimation (1987)
    Springer
    Journal of comparative physiology 157 (1987), S. 219-225 
    Details
    ISSN: 1432-136X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary 1. Parameters of the isometric twitch were measured for the pectoral fin adductor muscles of goldfishCarassius auratus acclimated to 10°C or 28°C. Contractile parameters and myofibrillar ATPase activities were measured at a range of temperatures. The muscle fibre composition was measured for transverse sections of pectoral fin adductor muscles from goldfish acclimated to 10°C or 28°C. 2. Cold acclimation was associated with an increase in the proportion of oxidative fibre types. Muscles from cold acclimated fish had an average of 23% more red and pink fibres than muscles from warm acclimated fish. 3. Cold acclimated fin muscles also possessed a significantly higher myofibrillar ATPase activity than warm acclimated fin muscles. This difference was greatest at lower measurement temperatures. 4. Muscles from cold acclimated fish were able to maintain quicker rates of contraction and relaxation at low environmental temperatures, as shown by the possession of significantly shorter response times. 5. The temperature dependence (Q10) of the isometric twitch contratile parameters for fin muscle from warm or cold acclimated goldfish was similar over the temperature range 20–30°C. However, over the temperature range 6–15°C fin muscles from warm acclimated goldfish possessed consistently higher Q10's.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00692366
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  • 8
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    Reduction in site fidelity with smaller spatial scale may suggest scale-dependent information use (2015)
    Oxford University Press
    Details
    Publication Date: 2015-03-27
    Description: Animals change the strategy that they use to select breeding sites at the spatial scales of habitat, patch, and microhabitat. In this regard, breeding site fidelity is expected to vary according to environmental predictability, which, in turn, is expected to differ between each spatial scale. However, whether or not animals change their degree of site fidelity at different spatial scales remains unclear. We captured and released males of the terrestrial frog Pseudophryne bibronii into alternative patches within a breeding habitat and determined the extent to which site fidelity influenced individual nest-site choice. We found that males tended to return to their original patch rather than resettle in an alternative patch. However, males were unlikely to return to their original nest sites within the patch. We suggest that site fidelity in this species may be scale dependent because information from previous breeding seasons can predict the quality of patches, but not nest sites. This behavioral variation is consistent with a hypothetical relationship between spatial scale and environmental predictability, which may have important implications for decision-making processes that extend over multiple spatial scales.
    Print ISSN: 1045-2249
    Electronic ISSN: 1465-7279
    Topics: Biology
    Published by Oxford University Press
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  • 9
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    Increase in radon emission due to rock failure: An experimental study (2011)
    Wiley
    Details
    Publication Date: 2011-07-22
    Description: Radon anomalies are commonly observed prior to dynamic failure in the crust and are interpreted as cracking of the medium, thus attracting considerable attention in understanding the precursory phenomena of earthquakes and volcanic activity. In this study we have compared the starting radon emissions from low porosity crystalline lava (phonolite) samples with those from damaged and failed samples. The damaged sample was loaded up to just beyond the end of the linear elastic phase, as evidenced by the output of AE energy, the increase in total porosity and a decrease in P-wave and S-wave velocity relative to the intact sample. Whereas, the failed sample showed deformation behaviour characteristically brittle with increasing values of AE output and porosity as the sample approached macroscopic failure. Radon measurements have evidenced that dilatational microcracking of deformed sample produced no significant variation in radon emanation with respect to the intact sample. In contrast, after macroscopic failure, radon emanation drastically increased. Therefore, major finding from this study is that, in the case of low porosity and relatively high strength crystalline lavas, the development of a macroscopic fracture provides new large exhaling surface resulting in a substantial increase in radon emission rate.
    Print ISSN: 0094-8276
    Electronic ISSN: 1944-8007
    Topics: Geosciences , Physics
    Published by Wiley on behalf of American Geophysical Union (AGU).
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  • 10
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    Chemical enrichment and physical conditions in I Zw 18 (2013)
    EDP Sciences
    Details
    Publication Date: 2013-04-23
    Print ISSN: 0004-6361
    Electronic ISSN: 1432-0746
    Topics: Physics
    Published by EDP Sciences
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