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The enantioselective bioactivity against pathogens (Cercospora arachidicola, Fulvia fulva, and Phytophthora infestans) and acute toxicity to Daphnia magna of the fungicide myclobutanil enantiomers were studied. The (+)‐enantiomer in an antimicrobial activity test was about 1.79–1.96 times more active than the (–)‐enantiomer. In the toxicity assay, the calculated 24‐h LC50 values of the (–)‐form, rac‐form...
The chiral pesticide enantiomers often have different toxic effects and environmental behaviors, which suggests that the risk assessments should be on an enantiomeric level. In this work, the chiral separation of the napropamide enantiomers and the stereoselective degradation in tomato, cucumber, rape, cabbage, and soil were investigated. Napropamide enantiomers could be separated absolutely by high‐performance...
In the present study we investigated the enantioselective disappearance of hexaconazole in rat liver microsomes system prepared from both genders. High‐performance liquid chromatography (HPLC) was used for identification and quantification. The degradation of the (+)‐hexaconazole was faster than that of the (−)‐hexaconazole in racemic hexaconazole and single enantiomer incubation in both sexes. The...
Stereoselective degradation of Diclofop‐methyl (DM) has been found in alcohol fermentation of grape must and sucrose solution with dry yeast. A method was developed for separation and determination the two enantiomers of DM during the fermentation process by high‐performance liquid chromatography based on cellulose tri‐(3,5‐dimethylphenyl‐carbamate) chiral stationary phase. The results showed that...
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