Dry-heat resistance of selected psychrophiles.
نویسندگان
چکیده
منابع مشابه
Chemical states of bacterial spores: dry-heat resistance.
Mature bacterial spores can be manipulated by chemical pretreatments between states sensitive and resistant to dry heat. The two chemical forms of the spore differ in dry-heat resistance by about an order of magnitude. Log survivor curves for each chemical state were approximately straight lines. The temperature dependence of dry-heat resistance for each chemical state was similar to that usual...
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Psychrophiles are extremophilic bacteria or archaea which are cold-loving, having an optimal temperature for growth at about 158C or lower, a maximal temperature for growth at about 208C and a minimal temperature for growth at 08C or lower. Psychrotrophs are cold-tolerant bacteria or archaea that have the ability to grow at low temperatures, but have optimal and maximal growth temperatures abov...
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The advantages and disadvantages of three forms of dry heat sterilization are discussed. In addition a fourth method, consisting of heating by infrared rays in vacuo, is described. This method is particularly suitable for instruments used in the operating theatre, since it can replace an autoclave where a supply of steam is not available. Recommended times and temperatures for dry heat steriliz...
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It is well known that the availability of water has a pronounced influence on the heat resistance of microorganisms. The resistance of completely dry organisms is many times higher than the resistance of the same organisms in a dilute suspension which has a water activity close to 1.0. There is, however, very little information about the resistance of vegatative bacterial cells at the intermedi...
متن کاملInfluence of spore moisture content on the dry-heat resistance of Bacillus subtilis var. niger.
The dry-heat resistance of Bacillus subtilis var. niger spores located in or on various materials was determined as D and z values in the range of 105 through 160 C. The systems tested included spores located on steel and paper strips, spores located between stainless-steel washers mated together under 150 inch-lb and 12 inch-lb of torque, and spores encapsulated in methylmethacrylate and epoxy...
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ژورنال
عنوان ژورنال: Applied and Environmental Microbiology
سال: 1977
ISSN: 0099-2240,1098-5336
DOI: 10.1128/aem.34.2.150-154.1977