Reduction in peroxide values and monocarbonyls of oxidized methyl oleate by several microbial cultures

With oxidized methyl oleate as the substrate, a rapid method for the determination of microbial destruction of peroxides and monocarbonyls has been developed. Staphylococcus aureus showed extensive destruction of peroxides by both cells and supernatant fluid, while Bacillus cereus, Micrococcus cryophilus, Serratia marcescens, and Sarcina lutea had activity only in the cells. Escherichia coli was inactive. Destruction of 2,4-dienals, 2-enals, and n-alkanals followed a similar pattern except that E. coli cells also were active against the monocarbonyl classes. Paper chromatography did not reveal any selective action against specific monocarbonyls within the classes.

Ozone and vitamin E

Vitamin E deficiency in rats is associated with a greater susceptibility to lethal levels of ozone. Exposure of rats to sublethal ozone concentrations produces an accelerated decline in serum vitamin E levels. These findings are consistent with the possibility that lipid peroxidation is a mechanism of ozone toxicity.