Physical determinants of radiation sensitivity in bacterial spores
نویسندگان
چکیده
منابع مشابه
Radiation Inactivation of Bacterial Spores on Mars
Introduction: The conditions on Mars are thought to have been more conducive for life during its early history, about 3 billion years ago. If life ever evolved on Mars, would it be possible to see the remnants of a long-extinct biosphere today? Or even more interesting, would it be possible to find Martian bacterial spores that survived for billions of years on Mars? Bacterial spores exhibit a ...
متن کاملRadiation for Certain Anaerobic Bacterial Spores
and only three incorporated inorganic sulfate into their microbial proteins when cysteine was present in the medium. One of these cultures, Lachnospira mvltiparus, incorporated about equal amounts of inorganic sulfate into glutathione and microbial protein when cysteine was present in the medium; but failed to form radioactive glutathione when S35 labeled inorganic sulfate was the only source o...
متن کاملThe physical state of water in bacterial spores.
The bacterial spore, the hardiest known life form, can survive in a metabolically dormant state for many years and can withstand high temperatures, radiation, and toxic chemicals. The molecular basis of spore dormancy and resistance is not understood, but the physical state of water in the different spore compartments is thought to play a key role. To characterize this water in situ, we recorde...
متن کاملFurther studies on the ionizing radiation inactivation of bacterial spores.
where N/No is the fractional survival of the spore colony-forming ability, V is the "target volume" parameter in appropriate units, I is the radiation dose, and n is an integer (Woese, 1958a, b; Donnelan and Morowitz, 1957). The second equation is derived on the assumption that the radiosensitive portion of the spore consists of n pairs of targets, and survival occurs so long as one member of e...
متن کاملPhysical Surface Features and Chemical Density of Dry Bacterial Spores.
Berlin, E. (U.S. Department of Agriculture, Washington, D.C.), H. R. Curran, and M. J. Pallansch. Physical surface features and chemical density of dry bacterial spores. J. Bacteriol. 86:1030-1036. 1963.-Gas-displacement and gas-adsorption techniques were used to determine the chemical density and physical surface properties of the spores of Bacillus subtilis 15U, B. cereus 720, and B. stearoth...
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ژورنال
عنوان ژورنال: Advances in Space Research
سال: 1983
ISSN: 0273-1177
DOI: 10.1016/0273-1177(83)90176-x