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  • Humans  (316)
  • Molecular Sequence Data
  • temperature
  • American Association for the Advancement of Science (AAAS)  (316)
  • Springer  (9)
  • 1980-1984  (325)
  • 1975-1979
  • 1981  (325)
Collection
Keywords
Publisher
  • American Association for the Advancement of Science (AAAS)  (316)
  • Springer  (9)
Years
  • 1980-1984  (325)
  • 1975-1979
Year
  • 1
    Electronic Resource
    Electronic Resource
    Effect of temperature on light utilization efficiency of leaves in C3 legumes and C4 grasses (1981)
    Springer
    Photosynthesis research 1 (1981), S. 243-249 
    Details
    ISSN: 1573-5079
    Keywords: C4 grass ; C3 legume ; light utilization efficiency ; temperature
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The effect of temperatures between 15 and 50°C on the light utilization efficiency of leaf net photosynthesis was studied in two C4 grasses and two C3 legumes. In the legumes, light utilization efficiency (μ mol of CO2 fixed per μ Einstein of incident photosynthetic quantum flux) declined linearly with temperature between 15 and 45°C. On the other hand, it was independent of temperature between 15 and 40°C in the grasses, but it declined rapidly between 40 and 50°C. Values for grasses were greater than those for legumes at all temperatures; for example, at 30°C the ratio of the mean values of grass to legume was 1.6–1.7 which is similar to a previously published value of 1.6. Light utilization efficiency was similar for grasses and legumes only at temperatures below 10 and above 50°C. These findings are compared with published data, especially those of Ehleringer and Björkman, and their implications for predicting or interpreting the distribution of C3 and C4 species are briefly discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00034267
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  • 2
    Electronic Resource
    Electronic Resource
    Estimating thermal properties of simulated aquatic soils from their composition (1981)
    Springer
    Hydrobiologia 80 (1981), S. 225-230 
    Details
    ISSN: 1573-5117
    Keywords: aquatic ; temperature ; soil ; composition ; gas ; water ; annual change
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Heat penetration and thermal lag in the submersed soil surrounding the roots of aquatic plants depends on two fundamental thermal properties of the substrate, volumetric heat capacity (CV) and thermal conductivity (k). The relationship of these parameters to the fractions of organic and mineral matter, gas and water in natural and simulated aquatic soils was investigated. The gas fraction was found to be insignificant and it was possible to make good estimates of CV and k from a knowledge of substrate water content alone.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00018361
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  • 3
    Electronic Resource
    Electronic Resource
    Temperature dependence of filament length of Anabaena spiroides Klebahn var. crassa Lemm. (1981)
    Springer
    Hydrobiologia 83 (1981), S. 419-423 
    Details
    ISSN: 1573-5117
    Keywords: Anabaena spiroides Klebahn var.crassa Lemm. ; filament length ; temperature
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Temperature dependence of filament length ofAnabaena spiroides Klebahn var.crassa Lemm. was examined for a strain isolated from Lake Kasumigaura, Japan. The length of the algal filaments is shown to have good correspondence with the thermal master reaction of cell multiplication.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02187039
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  • 4
    Electronic Resource
    Electronic Resource
    A laboratory study on the thermal tolerance of four southeastern stream insect species (Trichoptera, Ephemeroptera) (1981)
    Springer
    Hydrobiologia 79 (1981), S. 141-145 
    Details
    ISSN: 1573-5117
    Keywords: Thermal tolerance ; temperature ; benthic insects ; Trichoptera ; Ephemeroptera
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The acute thermal tolerances of four southeastern stream insect species, Ephemerella invaria (Walker), Stenonema ithaca (Clemens and Leonard), Symphitopsyche morosa (Hagun), and Brachycentrus lateralis (Say) were determined using an artificial stream enclosure. All species were acclimated at 10°C for 72 hours prior to instantaneous immersion into heated water for 96 hours. Percent mortality was recorded and the temperature at which 50% mortality occurred determined (LT5o). Data were subjected to standard statistical analysis. Thermal tolerance values were compared between species tested and to results from previous investigations using similar methodologies. The evolution and life histories of these species were also discussed in relation to their thermal tolerance values.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00006121
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  • 5
    Electronic Resource
    Electronic Resource
    Swimming performance and metabolic rate of three tropical fishes in relation to temperature (1981)
    Springer
    Hydrobiologia 83 (1981), S. 245-254 
    Details
    ISSN: 1573-5117
    Keywords: active metabolism ; basal metabolism ; metabolic compensation ; swimming performance ; temperature
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Oxygen consumption was measured for three tropical fishes,Exodon paradoxus, Leporinus fasciatus andLabeo erythrurus in relation to swimming speed and temperature. For each species the logarithm of oxygen consumption (mg 02 · g−1 · h−1) increased linearly with relative swimming speed (1 · s−1) with the value of the regression coefficients varying inversely with temperature. Active metabolism and critical swimming speed ofE. paradoxus andL. fasciatus increased with temperature to a maximum at 30 and 35° C respectively. Basal metabolic rates ofE. paradoxus andL. fasciatus increased with temperature. Metabolic rates and critical swimming speed of the three fishes studied were consistent with values for polar, temperate and other tropical species over their respective thermal ranges of tolerance. Tropical fishes have lowered their metabolism and swimming performance from that expected for many temperate species at the same temperature.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00008273
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  • 6
    Electronic Resource
    Electronic Resource
    Thermoregulatory behavior of the triggerfish Balistes fuscus in an electronic shuttlebox (1981)
    Springer
    Hydrobiologia 83 (1981), S. 255-256 
    Details
    ISSN: 1573-5117
    Keywords: thermoregulation ; behavior ; temperature ; triggerfish ; Balistes fuscus ; tropical reef ; Ichthyotron
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Ten blue triggerfish,Balistes fuscus, were tested individually for 3 days each in Ichthyotron electronic shuttleboxes to measure their thermoregulatory behavior. The modal thermal preferendum, a species-specific measure of temperature preference which is independent of prior thermal acclimation, was 25 °C. The triggerfish voluntarily occupied a 16–27 °C range of temperature, out of a potentially available range of 0–50 °C. There was no significant difference in preferred temperature between night and day, indicating lack of a thermoregulatory rhythm in this species. The preferred temperature range of this tropical marine reef species is similar to that of cool temperate freshwater and marine fishes; many warm temperate species prefer higher temperatures.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00008274
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  • 7
    Electronic Resource
    Electronic Resource
    The effect of temperature and water quality on the in vitro development and survival of Asellus aquaticus (Crustacea: Isopoda) eggs (1981)
    Springer
    Hydrobiologia 78 (1981), S. 227-236 
    Details
    ISSN: 1573-5117
    Keywords: Asellus ; isopod ; temperature ; water quality ; eggs ; survival ; development
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The rate of development and degree of survival of Asellus aquaticus eggs outside the marsupium of ovigerous females are affected by water quality and temperature. Eggs were maintained in polluted river water and relatively clean canal water. Developmental rates increase with increased temperature, but survival decreases. Eggs from polluted site ovigerous females survive better in clean water than in polluted water. Eggs from clean site ovigerous females maintained in polluted water have significantly lower survival rates than eggs from the polluted site at all temperatures tested. The developmental rate of clean site eggs is increased significantly in polluted water at 10–25 °C, possibly as a response to the stress imposed upon them. It is suggested that the method outlined might form the basis of a useful bioassay technique for measuring water quality.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00008519
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  • 8
    Electronic Resource
    Electronic Resource
    The Gammaridae and Corixidae of an inland saline lake from 1975 to 1978 (1981)
    Springer
    Hydrobiologia 76 (1981), S. 33-44 
    Details
    ISSN: 1573-5117
    Keywords: Corixidae ; Gammaridae ; temperature ; salinity ; aquatic macrophytes ; food resources ; predation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract When observations began the population of Watch Lane Flash consisted of Gammarus duebeni and Sigara lateralis. Gammarus tigrinus was then introduced; probably during a transfer of water from a nearby canal. G. tigrinus rapidly increased in numbers and at the same time G. duebeni and S. lateralis decreased to zero. There followed a partial recolonisation by corixids but the species present were Sigara concinna and Sigara dorsalis. Throughout the study period corixid populations were stable in two immediately adjacent water bodies, one of which also contained G. duebeni. Thus the changes described were associated with the presence of G. tigrinus. The reasons for the success of G. tigrinus and its effects on other gammarids and corixids are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00014031
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  • 9
    Electronic Resource
    Electronic Resource
    The toxicity of 2,4-D to Cyprinus carpio var. Communis in relation to the seasonal variation in the temperature (1981)
    Springer
    Hydrobiologia 77 (1981), S. 155-159 
    Details
    ISSN: 1573-5117
    Keywords: 2,4-D ; bioassay ; season ; TIm ; temperature
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The paper deals with the variations in the toxicity of 2,4-D to Cyprinus carpio at different temperatures during different seasons of the year. The higher temperature has higher toxicity and vice versa at the same concentration. The TLm values indicate that there is a 7–7.5 fold increase in toxicity with the rise in temperature from 17°C in February (winter) to 39°C in May (summer). These results have significance in manipulating the 2,4-D doses for the eradication of aquatic weeds in different seasons.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00008874
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  • 10
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    Testosterone: a major determinant of extragenital sexual dimorphism (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-03-20
    Description: Sexual dimorphism in selected extragenital tissues is described with emphasis on the molecular basis of the differences. Testosterone rather than 5 alpha-dihydrotestosterone appears to be the major intracellular androgen in organs other than skin and reproductive tract, but other steroid metabolites and their receptors are required to produce the diverse tissue differences observed in males and females. There is also evidence that multiple hormones from several endocrine glands are required to act in concert with androgens to produce and maintain their effects. Although many of the consequences of sexual dimorphism, such as body size and strength, have been evident for centuries, other differences between males and females such as disease incidence, response to drugs and toxins, and the metabolism and assimilation of dietary constituents have only recently been discovered.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Bardin, C W -- Catterall, J F -- HD-13541/HD/NICHD NIH HHS/ -- New York, N.Y. -- Science. 1981 Mar 20;211(4488):1285-94.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7010603" target="_blank"〉PubMed〈/a〉
    Keywords: Androgen-Insensitivity Syndrome/metabolism ; Androgens/metabolism/physiology ; Animals ; Erythropoiesis ; Estradiol/physiology ; Humans ; Kidney/metabolism ; Liver/metabolism ; Male ; Mice ; Muscles/metabolism ; Progestins/physiology ; Proteins/secretion ; Rats ; Receptors, Androgen/metabolism ; *Sex Differentiation ; Testosterone/metabolism/*physiology ; Transcription, Genetic
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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