The antioxidant activities and phenolic contents of mulberry leave extracts obtained by aqueous mixture acetone, ethanol methanol were determined. Both alkaline hydrolysis acid used to extract bound phenolics. HPLC was determine the profile extracted Three experimental assays, namely, Fe3+ reducing power (FRAP), ABTS- DPPH-radical scavenging activity, employed characterize their activity. This ...

Manuscript describes producing keratin hydrolysate from sheep wool through two-stage technology whose principle consists in first having wool processed in an alkaline environment during the first stage, and then effecting hydrolysis in the second stage through the action of proteolytic enzyme. Experiments were planned in accordance with factor schemes of 23 types in which factors under study we...

The DNA molecules isolated from mature bacteriophage PM2 are closed double-stranded rings of a molecular weight of six million. Direct evidence for the circularity and supercoiling of PM2 DNA was obtained by electron microscopy. Other properties, such as sedimentation behavior at neutral and alkaline pH, unusually high buoyant density in alkaline CsCl, and stability upon heating, are consistent...

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 pH dependence of the steady state kinetic parameters K,(app) and $,t of the a-, acetylated 6-, and ar-chymotrypsincatalyzed hydrolysis of the specific amide substrate N-acetylr.-tryptophanamide, has been investigated in the neutral and alkaline pH regions. A completely automatic technique for measuring the hydrolysis of amides was used. New results and important aspects of the chymotrypsin-...

The influence of humic substances (HSs) upon the alkaline hydrolysis of N-methylN-nitroso-p-toluene sulfonamide has been studied. Important inhibition of hydrolysis reaction has been reported. This inhibition has been explained in terms of association of reactants to the humic substances. Kinetic results have been modeled using the micellar pseudophase model. C © 2010 Wiley Periodicals, Inc. In...