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  • 1980-1984  (3)
  • 1980  (3)
Material
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  • 1980-1984  (3)
Year
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    The journal of membrane biology 55 (1980), S. 123-131 
    ISSN: 1432-1424
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Summary Members of four homologous series of tetra-alkyl ammonium bromides (R 3N+(CH2) n−1·CH3Br− whereR=H, CH3 or C2H5 andR′N+H3Br− whereR′ represents the isomeric butyl series) have been synthesized and tested as sodium pump inhibitors, measured as ouabain-sensitive K+ influx, and as hemolytic agents on human red cells. Potency for both effects is presented graphically, plotting the logarithm of the concentration for half maximal effect against alkyl chain length. Both hemolysis and pump inhibition studies yielded a biphasic response consisting of two good straight lines, with effectiveness increasing up to C10–12 and then remaining constant up to C20. For hemolysis the alkyl ammonium series was most effective. The calculated free-energy change per methylene group was the same for three series of compounds, but the free-energy contribution from the headgroup was lower for the ammonium series. In contrast, although pump inhibition studies also yielded simple biphasic plots, inhibition occurred at 3- to 50-fold lower concentrations and there were significant differences between the three series, both in the free-energy changes per methylene group and in the headgroup contributions. We have analyzed these results thermodynamically to take account of hydrophobic interactions and the conformation of the alkyl chains.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1432-8798
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Skin infections induced in hairless mice with an Acyclovir resistant herpes simplex virus (HSV) mutant were not followed by the death of the animals, and the survivors had no evidence of latent infections in their sensory ganglia. However, mutant virus was detected in the ganglia during the acute phase of the infection. Mice inoculated with the mutant were fully protected against the fatal outcome of the infection when subsequently challenged with the relatively pathogenic parental virus. In addition the frequency of latent infections established after challenge was significantly reduced. Phosphonoacetic acid treatment of the primary mutant-induced infection abolished the protection against reinfection with parental virus. Acyclovir treatment of the primary infection with the mutant virus did not affect the protection against reinfection with parental virus. The results indicate that drug-resistant, latency-negative, HSV mutants are a promising starting point for the development of an attenuated HSV vaccine.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 286 (1980), S. 403-404 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Surprisingly few data are available on the effects of temperature on Na and K transport in human erythrocytes. This may be due in part to the presence of at least three components of Na and K movement in human red cells. These can be resolved as the ouabain-sensitive Na-K pump1'2, the ...
    Type of Medium: Electronic Resource
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