title: Dry-heat destruction of lipopolysaccharide: dry-heat destruction kinetics.
abstract: Dry-heat destruction kinetics of lipopolysaccharides from Escherichia coli, Serratia marcescens, and Salmonella typhosa at 170 to 250 degrees C are described. The destruction rate seems to follow the second order and can be linearized by the equation, log y = a + b . -10cx. Because c is the slope, 1/c = D3. Both a and b are constant at a given temperature and are linear functions of temperature. The D(3)170, D(3)190, D(3)210, D(3)230, and D(3)250 values for E. coli lipopolysaccharide are 251, 99.4, 33.3, 12.3, and 4.99 min, respectively, with a z value of 46.4 min. The D values for lipopolysaccharides from S. marcescens and S. typhosa are not significantly different from those from E. coli lipopolysaccharide.
mesh_terms: D004926:Escherichia coli; D006358:Hot Temperature; D007700:Kinetics; D008070:Lipopolysaccharides / Q000378:metabolism*; D011550:Pseudomonas aeruginosa; D012485:Salmonella typhi; D012706:Serratia marcescens; D013045:Species Specificity
chemical_list: D008070:Lipopolysaccharides