crocin has been researched along with ethylene* in 2 studies
2 other study(ies) available for crocin and ethylene
| Article | Year |
|---|---|
Oxidative destruction of biomolecules by gasoline engine exhaust products and detoxifying effects of the three-way catalytic converter.
Aqueous solutions of engine exhaust condensation products were derived from cars powered by diesel or four-stroke gasoline engines (with and without three-way catalytic converter). The cars were operated on a static test platform. Samples of the different exhaust solutions accumulated in a Grimmer-type distillation trap (VDI 3872) during standard test programs (Federal Test Procedure) were incubated with important biomolecules. As indicators of reactive oxygen species or oxidative destruction, ascorbic acid, cysteine, glutathione, serum albumin, the enzymes glycerinaldehyde phosphate dehydrogenase and xanthine oxidase, and the oxygen free-radical indicator keto-methylthiobutyrate were used. During and after the incubations, oxygen activation (consumption) and oxidative destruction were determined. Comparison of the oxidative activities of the different types of exhaust condensates clearly showed that the exhaust condensate derived from the four-stroke car equipped with a three-way catalytic converter exhibited by far the lowest oxidative and destructive power. Topics: Antioxidants; Ascorbic Acid; Automobiles; Carotenoids; Ethylenes; Gasoline; Glyceraldehyde-3-Phosphate Dehydrogenases; Methionine; Oxidation-Reduction; Reactive Oxygen Species; Serum Albumin, Bovine; Sulfhydryl Compounds; Vehicle Emissions; Xanthine Oxidase | 1992 |
Diesel soot particles catalyze the production of oxy-radicals.
The formation of a strong oxidant similar to the OH. radical is catalyzed by diesel soot particles in the presence of cysteine and hydrogen peroxide or in the presence of light. The oxidant(s) formed causes fragmentation of methylthioketobutyric acid measurable as ethylene release. Furthermore, the model carotenoid crocin is bleached and thiobarbituric-acid-reactive material (malondialdehyde) is produced from linolenic acid. All reactions are inhibited by scavengers (propyl gallate, alpha-tocopherol, diazobicyclooctane) and by catalase. The reactions observed suggest that the toxicity and mutagenicity of diesel soot particles is at least in part due to the formation of reactive oxygen species. Topics: Air Pollutants; Carbon; Carotenoids; Catalysis; Cysteine; Ethylenes; Free Radicals; Gasoline; Glutamates; Glutamic Acid; Hydrogen Peroxide; Light; Linolenic Acids; Oxidants, Photochemical; Oxidation-Reduction; Petroleum; Polyenes | 1989 |