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The release of dipicolinic acid during heating and its relation to the heat destruction of Bacillus stearothermophilus spores
Author(s) -
Mallidis C.G.,
Scholefield J.
Publication year - 1985
Publication title -
journal of applied bacteriology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.889
H-Index - 156
eISSN - 1365-2672
pISSN - 0021-8847
DOI - 10.1111/j.1365-2672.1985.tb03348.x
Subject(s) - dipicolinic acid , spore , bacillus (shape) , heat resistance , endospore , microbiology and biotechnology , biology , chemistry , materials science , composite material
The rates of dipicolinic acid (Dpa) release and the rates of death were studied for spores of five strains of Bacillus stearothermophilus . It was observed that a highly significant relationship exists between the rate of Dpa release and rate of spore death for the four out of five strains tested and for all test temperatures. At 115d̀C the rate of Dpa release was found to be faster than the rate of death, equal at 120d̀C and slower at 125d̀C. The role of Dpa in heat resistance was considered and a theory is proposed to explain the mechanism by which the heat resistance of bacterial spores is overcome.