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Effect of Glycerol on Bacterial Inhibition
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Effect of Glycerol on Bacterial Inhibition

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Questions and Answers

What was observed by Jakobsen and Murrell in their studies on the germination of Bacillus and Clostridium spores?

  • No inhibition of spore germination when aw was controlled by acetamide or urea
  • Complete inhibition of spore germination when aw was controlled by glycerol or ethylene
  • Strong inhibition of spore germination when aw was controlled by glucose or sorbitol
  • Less inhibition of spore germination when aw was controlled by NaCl or CaCl2 (correct)

    • At what limiting aw value for the formation of mature spores by B.cereus strain T was glycerol shown to have an inhibitory effect?

  • 0.90
  • 0.85
  • 0.91 (correct)
  • 0.95

    • Which substance permitted growth at lower aw values than sucrose or NaCl in a glucose minimal medium with Pseudomonas fluorescens, according to Prior's findings?

  • Glycerol (correct)
  • NaCl
  • Sorbitol
  • Glucose

    • What was the observed effect on the catabolism of glucose, sodium lactate, and dL-arginine when aw values were controlled with NaCl?

    <p>Catabolism was completely inhibited</p> Signup and view all the answers

    Compared to NaCl, how does glycerol affect the tolerability of yeasts and molds?

    <p>Glycerol is less inhibitory to yeasts and molds</p> Signup and view all the answers

    What was the observed effect on the germination of clostridial spores at aw 0.95 when urea, glycerol, or glucose was employed?

    <p>No inhibition</p> Signup and view all the answers

    In comparison to salt-sensitive species, how does glycerol's inhibitory effect compare when tested at similar levels of aw?

    <p>Less inhibitory than NaCl</p> Signup and view all the answers

    Which substance showed very little inhibition on the germination of spores when used for controlling aw according to Jakobsen and Murrell?

    <p>Glycerol</p> Signup and view all the answers

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