Activity of Crystalline Preparations of Vitamin B1

comparison of catalytic activity of heteropoly compounds in the synthesis of bis(indolyl)alkanes.

heteropoly acids (hpa) and their salts have advantages as catalysts which make them both economically and environmentally attractive, strong br?nsted acidity, exhibiting fast reversible multi-electron redox transformations under rather mild conditions, very high solubility in polar solvents, fairly high thermal stability in the solid states, and efficient oxidizing ability, so that they are imp...

Action de diverses preparations denommees (vitamin b1) sur les cultures de Leishmania tropica

Inhibition of Chymotrypsin Activity in Crystalline Trypsin Preparations.

Investigations of protein structures have made extensive use of trypsin to obtain specific cleavage of the peptide chains at the carboxyl groups of lysine and arginine and more recently of aminoethylcysteine residues (1, 2). Unfortunately for such studies, it has been noted that many samples of crystalline trypsin display appreciable amounts of chymotrypsin activity. We have used trypsin to cle...

Vitamin B1

Vitamin B1 is a watersoluble vitamin. It consists out of a pyrimidineand a thiazol ring, which are synthesized independently and linked afterwards.Vitamin B1 is de novo produced by many plants and microorganisms. Humans and animals have to take it up by nutrition. They are only able to do the phosphorylation reaction of the thiamin molecule. Thiamin is found free and as mono-, diand triphosphat...

detection of volatile compounds of medicinal plants with some nano-sorbents using modified or new methodologies and investigation of antioxidant activity of their methanolic extracts

in this work, a novel and fast method for direct analysis of volatile compounds (davc) of medicinal plants has been developed by holding a filament from different parts of a plant in the gc injection port. the extraction and analysis of volatile components of a small amount of plant were carried out in one-step without any sample preparation. after optimization of temperature, extraction time a...