Homogeneous preparations of the potassium-requiring yeast aldehyde dehydrogenase are active with either DPN or TPN in the oxidation of a wide variety of aldehydes. Exogenous mercaptan is not a requirement for catalytic activity. The enzyme is denatured in 6 M guanidine hydrochloride to form a protein species with a molecular weight somewhat greater than 21,000. The denatured protein may be reas...

coagulate bovine plasma albumin, 'y-globulin and egg albumin to form opaque gels at room temperature and neutrality. The reaction with bovine plasma albumin is many times more rapid than with the other two proteins. Gels so formed rapidly dissolve in concentrated solutions of amides such as urea. The capacity of albumin to form this type of gel is decreased by partial acetylation of the albumin...

This research focuses on activated carbons as adsorbents and catalysts for the removal of methyl mercaptan (MM) – odoriferous sulfur-containing compound commonly added to natural gas for leak detection purposes. Activated carbons are well known for their exceptional ability to adsorb some acidic gases. The application of activated carbons to remove hydrogen sulfide (one of the natural gas conta...

A convenient synthesis of novel bi/tricyclic azasugars fused thiazolidin-4-one and thiazinan-4-one by the one-pot tandem Staudinger/aza-Wittig/cyclization reaction under microwave radiation was demonstrated. The reactions were carried out with the azidosugar 1 and mercaptan acids via a key intermediate Schiff base and stereoselectively afforded the titled bi/tricyclic azasugars in good yield. A...

Organic compounds containing thiourea function find many industrial, agricultural, pharmaceutical and analytical applications. Consequently, convenient, reliable, rugged and cost-effective methods for ensuring the quality of commercial products based on it are highly desirable. The case with which hydrogen peroxide in the presence of an excess of sodium hydroxide oxdatively desulphurise the thi...

Allicin, an extract from garlic, has been shown to be a systemic and pulmonary arterial vasodilator that acts by an unknown mechanism. In the present experiments, pulmonary vascular responses to allicin (10-100 microg), allyl mercaptan (0.3-1 mg), and diallyl disulfide (0.3-1 mg) were studied in the isolated lung of the rat under constant-flow conditions. When baseline tone in the pulmonary vas...

The adsorption of sodiumdodecyl sulfate (SDS) on gold surfaces coveredwith self-assembledmonolayers (SAMs) of thiols made with either hexadecyl mercaptan or 2-aminoethanethiol hydrochloride was investigated by probing the surface charge. This was accomplished by determining the force between a modified (with a negatively charged silica sphere) tip of an atomic forcemicroscope and the surface as...