Development, analysis, and effectiveness of an F-C-MgO/rGOP catalyst for the degradation of atrazine using ozonation process: Synergistic effect, mechanism, and toxicity assessment.

This study considered the effects of fluoride, MgO, sucrose, and rGO on the characteristics of the fluoride-carbon-MgO/rGO predicted (F-C-MgO/rGOP) catalyst and its effectiveness in the catalytic ozonation process (COP) for atrazine elimination from aqueous solutions. Using a mixture design, the catalyst composition was optimized to 13.6% sucrose, 50% Mg (OH)2, 25% NaF, and 11.

Metabolome and microbiome analysis revealed the effect mechanism of different feeding modes on the meat quality of Black Tibetan sheep.

Introduction: Black Tibetan sheep is one of the primitive sheep breeds in China that is famous for its great eating quality and nutrient value but with little attention to the relationship between feeding regimes and rumen metabolome along with its impact on the muscle metabolism and meat quality.

Methods: This study applies metabolomics-based analyses of muscles and 16S rDNA-based sequencing of rumen fluid to examine how feeding regimes influence the composition of rumen microbiota, muscle metabolism and ultimately the quality of meat from Black Tibetan sheep. Twenty-seven rams were randomly assigned to either indoor feeding conditions (SG,  = 9), pasture grazing with indoor feeding conditions (BG,  = 9) or pasture grazing conditions (CG,  = 9) for 120 days.

Mycobacterium alvei (ω-1)-methoxy mycolic acids: Absolute stereochemistry and synthesis.

Cells of Mycobacterium alvei are known to contain a unique set of mycolic acids with a (ω-1)-methoxy group; although the various enzymes in the biosynthesis of other types of mycolic acid have been widely studied, the biosynthetic route to this substituent is unclear. We now define the stereochemistry of the (ω-1)-methoxy fragment as R, and describe the synthesis of a major R-(ω-1)-methoxy-mycolic acid and its sugar esters, and of two natural M. alvei diene mycolic acids.