THE catalytic effect of small amounts of pyridine in the reaction between thionyl chloride and carboxylic acids is well known; Carré and Libermann 1 have shown further that it is of great ...

A uric acid test measures the amount of a waste product called uric acid (urate) in your blood or urine. Uric acid is a byproduct of the breakdown of chemicals called purines found in foods and drinks ...

In this study, we report a mild and convenient stereoretentive decarboxylative amidation of α,β-unsaturated carboxylic acids with easily procurable 1,4,2-dioxazol-5-ones, providing a practical ...

State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Frontiers Science Center for New Organic Matter, Nankai University, Tianjin 300071, China ...

The content of tartaric acid in the finished wine not to be less than 1,500 ppm weight by volume. n/a (d) Grape juice (d) Acidity regulator (d) Good Manufacturing Practice n/a (e) Ice cream mix; Ice ...