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  • 1
    ISSN: 1550-7408
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: SYNOPSIS. Paramecium multimicronucleatum was grown in a buffered desiccated lettuce medium maintained at pH 7.5, with Aerobacter aerogenes the main bacterial source. The maximum expansion in length and width was at pH 6.0; the minimum expansion in length and width at pH 8.5. The paramecia were usually stouter at pH levels 〈 7.0 except at pH 5.5 and generally more slender 〉 pH 7.0.The pH of the medium affected the size of food vacuoles as indicated by the fact that the maximum food vacuolar diameter was at pH 6.0, the minimum at 7.0.The fastest and greatest expansion of food vacuole diam. was at a relative viscosity of 8; the minimum food vacuolar diam. was in controls (without gum arabic) having a viscosity of 1.3.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    ISSN: 1550-7408
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: SYNOPSIS. Most tricarboxylic acid cycle intermediates are oxidized by intact cells of the apochlorotic flagellate Astasia longa (Jahn). Use of these substrates depends on the pH of the medium. The acetate-stimulated respiration is much more sensitive to metabolic inhibitors than is cell motility. The following glyoxylate cycle and/or tricarboxylic acid cycle enzymes have been demonstrated in cell-free extracts: acetic-thiokinase, condensing-enzyme, aconitase, TPN-isocitric dehydrogenase, succinic dehydrogenase, fumarase, and malic dehydrogenase.
    Type of Medium: Electronic Resource
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