METHODS OF ASSESSING THE SPORICIDAL EFFICIENCY OF AN ULTRA‐HIGH‐TEMPERATURE MILK STERILIZING PLANT. II. EXPERIMENTS WITH SUSPENSIONS OF SPORES IN MILK
作者:
J. G. FRANKLIN,
D. J. WILLIAMS,
HELEN R. CHAPMAN,
L. F. L. CLEGG,
期刊:
Journal of Applied Bacteriology
(WILEY Available online 1958)
卷期:
Volume 21,
issue 1
页码: 47-50
ISSN:0021-8847
年代: 1958
DOI:10.1111/j.1365-2672.1958.tb00113.x
出版商: Blackwell Publishing Ltd
数据来源: WILEY
摘要:
SUMMARY:The sporicidal efficiency of an ultra‐high‐temperature (UHT) milk processing plant has been tested using spores of a strain ofBacillus subtilisin milk. With the inoculum and volume of milk adjusted to obtain a countable number of survivors by a conventional dilution counting method, a temperature of 130·5° with the minimum time setting of the plant was found necessary to give a destruction of 99·99999%. This temperature was lower than that found previously (135°) for spores suspended in water and evidence is produced to support the suggestion that UHT milk may be inhibitory to the germination and/or subsequent growth of heated
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