Some Factors Affecting the Activity of Diethylpyrocarbonate as a Sterilant1
AUTOR(ES)
Splittstoesser, D. F.
RESUMO
Quantitative data indicated logarithmic death in 5° Brix Concord grape juice when concentrations of cells under 107/ml were exposed to diethylpyrocarbonate (DEPC). Species differed considerably in their resistance; e.g., 50 ppm reduced the viable count of Saccharomyces cerevisiae over nine log10 cycles, whereas 200 ppm reduced the count of Byssochlamys fulva ascospores by only about 1 log. DEPC lethality was enhanced by higher temperatures; destruction at 40 C was 10- to 100-fold greater than at 20 C. Studies on death rates showed that most yeasts and fungal spores were killed during the first hour of exposure, whereas 24 h or longer was needed for maximal destruction of several lactic acid bacteria. Repair of DEPC-induced damage was believed responsible for the slower death rates of the lactics.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=380928Documentos Relacionados
- Some Factors Affecting the Hill Reaction Activity in Cotton Chloroplasts 1
- SOME FACTORS AFFECTING THE NUTRITIONAL REQUIREMENTS OF STREPTOCOCCUS FAECALIS1
- FACTORS AFFECTING THE LYTIC ACTIVITY OF LYSOZYME1
- Some Factors affecting the Prevalence of Stammering
- SOME FACTORS AFFECTING STEROL FORMATION IN SACCHAROMYCES CEREVISIAE1
