served in IR spectrum. The inactivated lividomycin A consumed 6.2 moles of periodate for 24 hours as does lividomycin A (5.9 moles). Methanolysis of the inactivated lividomycin A (refluxed in 0.4 N hydrogen chloride in methanol for 6 hours) gave 3'deoxyparomamine, methyl lividotriosaminide phosphate and a small amount of methyl lividobiosaminide phosphate. These results indicate that the inacti...

Sibiromycin, possessing strong antitumor activity in animal experiments, is produced by Streptosporangium sibiricum. Sibiromycin can be isolated from culture filtrate using ion-exchange or by solvent extraction. The antibiotic was obtained as a crystalline substance with ultraviolet absorption maximaat 230 and 310 nm, [a]D+525° (in dimethylformamide); the empirical formula-C24H31N3O7. In 1 N hy...

The base-catalyzed methanolysis of roadside pennycress, olive, melon, grapeseed, hempseed, sunflower, and plum kernel oils was performed in the presence KOH (1% to oil weight) at temperature 60° C methanol/oil molar ratio 6:1. aim this work reveal influence fatty acid composition on kinetics these reactions. irreversible pseudo-first-order reaction used for modeling reactions, rate constant cor...

chyuri (Diploknema butyracea (roxburgh) H. J. lam) is widely used in nepal for its medicinal properties and as a source of chyuri ghee (fat) extracted from the seeds. the main purpose of the present study was the gc-MS analysis of fatty acids in seed fat of chyuri after acidic methanolysis. Palmitic acid methyl ester (1), linoleic acid methyl ester (2), oleic acid methyl ester (3) and steric ac...

An improved method for isolating cerebrosides from natural sources is described. The method is particularly suited to large scale work and can be adapted to the isolation of sphingolipids that are less polar than the gangliosides. It is based on the use of sodium sulfate to absorb the water from chloroform-methanol tissue extracts, the use of triiodide to cleave the ether linkage of plasmalogen...

3 Introduction 4 Interests and Applications 4 Chemistry of Polyamide Degradation 8 Hydrolysis 8 Recombination 8 Equilibrium 10 Acid Catalysis 11 Base Catalysis: Ethanolysis and Methanolysis 14 Molecular Weight Study 17 Instrumentation 18 Size Exclusion ChromatographyMultiangle Laser Light Scattering 18 Corrected Inherent Viscosity 19 Results 21 Alcohol Results 21 Acid Results 24 Absorption Stud...

Mycolic acids were detected in both reference strains and clinical isolates of mycobacteria using gas chromatography of fatty acid methyl esters prepared by acid methanolysis. The methyl esters were extracted with hexane, concentrated, and analyzed with a gas chromatograph by using two different injector temperatures. When the samples were analyzed at high injector temperatures of 300 to 350 de...