Protection of Bacillus pumilus Spores by Catalases
نویسندگان
چکیده
منابع مشابه
Kinetics of initiation of germination of Bacillus pumilus spores by hydrostatic pressure.
The kinetics of initiation of germination and inactivation by hydrostatic pressure of phosphate-buffered Bacillus pumilus spores is shown to be a consecutive first-order process at 25 C. The effect of increasing pressure at constant temperature was studied, and rate constants were derived by using the criteria of heat resistance, refractility, and stainability. The calculated volume change of a...
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Two strains of Bacillus pumilus (M11 and M38) and one strain each of Bacillus cereus (M27), Bacillus subtilis (M67), and Enterobacter agglomerans (M14) were identified from the air of Lancashire cotton mills. These strains were tested for cytopathic effects in Vero cells; B pumilus and B cereus strains were also examined for haemolytic activity, lecithinase production, and proteolytic action on...
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In this study, we investigated the inactivation efficacy of endospore-forming bacteria, Bacillus pumilus, irradiated by low-energy X-rays of different beam qualities. The different low-energy X-rays studied had cut-off energies of 50, 100 and 150 keV. Bacillus pumilus spores (in biological indicator strips) were irradiated at step doses between 6.5 to 390 Gy. The resulting bacteria populations ...
متن کاملInitiation of germination and inactivation of Bacillus pumilus spores by hydrostatic pressure.
The effect of hydrostatic pressures as high as 1,700 atm at 25 C on the heat and radiation resistance of Bacillus pumilus spores was studied. Phosphate-buffered spores were more sensitive to compression than spores suspended in distilled water. Measurements of the turbidity of suspensions, the viability, refractility, stainability, dry weight, and respiratory activity of spores, and calcium and...
متن کاملResistance and recovery studies on ultraviolet-irradiated spores of Bacillus pumilus.
A spore suspension model and a procedure for recovering ultraviolet (UV)-irradiated spores of Bacillus pumilus were investigated. A most-probable-number tube dilution method using double-strength Trypticase soy broth was found to be superior to the agar plate method for recovering optimal numbers of spores irradiated with sublethal doses of UV energy. Aqueous suspensions of B. pumilus survived ...
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ژورنال
عنوان ژورنال: Applied and Environmental Microbiology
سال: 2012
ISSN: 0099-2240,1098-5336
DOI: 10.1128/aem.01211-12