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Department of Food Science, North Carolina State University, Raleigh
ABSTRACT
The growth of Bacillus stearothermophilus was inhibited by raw or mildly heated milks; however, the growth of Bacillus subtilis was not inhibited under the same conditions. A microbiological assay for the determination of inhibitor concentrations was developed. After fractionation of the milk, the major portion of the total inhibitory activity remained with the acid-insoluble (pH 4.6) fraction, indicating that the milk component(s) which inhibits B. stearothermophilus is, or is associated with, the casein fraction.
1 Contribution from the North Carolina Agricultural Experiment Station, Raleigh. Published with the approval of the Director of Research as paper no. 2062 of the Journal Series.
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