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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?
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?
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?
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?
What was the observed effect on the catabolism of glucose, sodium lactate, and dL-arginine when aw values were controlled with NaCl?
Compared to NaCl, how does glycerol affect the tolerability of yeasts and molds?
Compared to NaCl, how does glycerol affect the tolerability of yeasts and molds?
What was the observed effect on the germination of clostridial spores at aw 0.95 when urea, glycerol, or glucose was employed?
What was the observed effect on the germination of clostridial spores at aw 0.95 when urea, glycerol, or glucose was employed?
In comparison to salt-sensitive species, how does glycerol's inhibitory effect compare when tested at similar levels of aw?
In comparison to salt-sensitive species, how does glycerol's inhibitory effect compare when tested at similar levels of aw?
Which substance showed very little inhibition on the germination of spores when used for controlling aw according to Jakobsen and Murrell?
Which substance showed very little inhibition on the germination of spores when used for controlling aw according to Jakobsen and Murrell?
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