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  • 1995-1999
  • 1980-1984  (7)
  • 1915-1919
  • 1980  (7)
Material
Years
  • 1995-1999
  • 1980-1984  (7)
  • 1915-1919
Year
  • 1
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Journal of medicinal chemistry 23 (1980), S. 444-448 
    ISSN: 1520-4804
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Journal of fish biology 17 (1980), S. 0 
    ISSN: 1095-8649
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: The presence of oocytes in the testes of several males indicates that the redbanded perch Ellerkeldia huntii exhibits protogynous hermaphroditism. All males appear to be secondary in origin; however the structure of the testes differ from most other protogynous serranids. In samples collected from the Poor Knights Is., New Zealand, males outnumbered females 2.7: 1 (n= 52). The numbers in each sex were equal until a length of 100–110 mm, after which the male proportion increased to 100%. The oldest female was aged 2+ years, whereas males were found as old as 5+ years. There were no colour differences associated with sex. The mean testes weight was only 7% of the mean ovary weight. Both sexes grew at the same rate. Observations during December indicated that although many individuals were solitary, some were paired. The larger individuals of pairs were males, the smaller females. Individuals foraged in the algal canopy on gammarid amphipods and mysid shrimps. The average range of movements was only 2·2 m2.
    Type of Medium: Electronic Resource
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  • 3
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    London : Periodicals Archive Online (PAO)
    Journal of historical geography. 6:2 (1980:Apr.) 209 
    ISSN: 0305-7488
    Topics: Geography
    Description / Table of Contents: The British Isles and the European mainland
    Notes: Reviews
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  • 4
    ISSN: 1432-0886
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract Spermatocytes of Stethophyma grossum were prepared for light microscope examination by a surface-spreading and silver-staining technique adapted with very little modification from a mammalian procedure. Very clear preparations of a variety of prophase I stages were obtained which revealed many details of chromosome and nuclear organisation. These observations and preliminary observations on two other grasshopper species demonstrate the ready applicability of these techniques to Orthopteran spermatocytes. A detailed study of six pachytene stage spermatocytes gave conclusive confirmation that three bivalents achieve full pairing in male meiosis of Stethophyma grossum, the other eight bivalents being partially paired at their procentric ends only.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Journal of cancer research and clinical oncology 96 (1980), S. 53-64 
    ISSN: 1432-1335
    Keywords: Adenine nucleotides ; Endotoxin ; Haemorrhagic necrosis ; Mitochondrial damage
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Alterations in the tumor adenine nucleotide pattern (TANP) have been measured at various times in a solid murine tumor undergoing haemorrhagic necrosis in vivo as a consequence of endotoxin administration. The ATP level fell rapidly in the first few hours; the AMP content initially rose, but began to fall back at 4 h. Overall adenine nucleotide losses occurred promptly, with only 4% of the original amount remaining at 24 h. Levels of glucose, glucose 6-phosphate, pyruvate, and lactate were also measured, and, with the exception of lactate, were for the most part lower in tumors from endotoxin-treated animals. Only minor alterations in the adenine nucleotide pattern were seen after either 4 or 24 h in the livers of normal or tumorbearing mice in response to endotoxin injection, even when the creatures were moribund. The changes reported in the tumor are believed to have arisen not as a result of capillary stasis, but from prompt and selective disturbances to mitochondrial function in the tumor which have been described previously (Jones, 1977b, 1979).
    Type of Medium: Electronic Resource
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  • 6
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract In two temperate reef fish, Pseudolabrus celidotus (Bloch and Schneider) and Tripterygion varium (Bloch and Schneider) studied near Leigh, New Zealand, most spawning activity was concentrated during the first 2 months of spawning seasons which lasted about 5 months. In P. celidotus, maturation and spawning of first-year females (0+) was delayed with respect to older (≥1+yr) females. Within the 0+ age class, the minimum size of maturation declined as the spawning season proceeded. However, in all females of T. varium, ripening and spawning took place over the same time ranges. Observations on the seasonal patterns of female aggression suggested that larger female P. celidotus were socially inhibiting the maturation of small females. The level of interaction was high compared to that in T. varium, and reached a peak over the onset of the spawning season. This hypothesis was tested by the removal of larger (≥1+yr) female P. celidotus from a field population. The remaining 0+ females increased in ovary weight and matured earlier than those in an undisturbed area. We argue from this experiment that it is of advantage for P. celidotus females to spawn early in the season and of advantage to inhibit other females from doing so. Two possible reasons are suggested, the first applying to sexchanging species such as P. celidotus, the second to temperate-water fishes in general.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Cellular Physiology 104 (1980), S. 425-431 
    ISSN: 0021-9541
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: Viable cell samples containing 93% pure granulocytes were obtained from human blood using the techniques of dextran sedimentation followed by centrifugal elutriation. The resting transmembrane potential (Em) of human granulocytes was estimated using the fluorescent lipophilic cation, Di-S-C3(5), from the null point for potassium - i.e., the external K concentration at which there is no change in Em in response to valinomycin (a K ionophore). The Em of human granulocytes, as calculated from the Nernst potential for K at the null point, is approximately - 100 mV. Data indicate that this large transmembrane potential is due in part to the presence of an electrogenic Na-K pump in human granulocytes which is stimulated by external potassium and inhibited by ouabain.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
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