results under the above chromatography condition, biuret compound (peqb) and the internal standard were detected at 4.5 and 13.5 minutes, respectively. limit of quantitation of the peqb was 0.1 µg/ml. accuracy of the method over the concentration range of 0.1-100 µg/ml was between 88-109%. inter- and intraday precisions were 4-19% and 6-8%, respectively. a good relationship in the form of a pow...

Incorporation of amino acids into proteins in HeLa cells, virus-transformed 3T3 mouse fibroblasts, and mouse plasmacytoma cells is inhibited after the addition of L-l-tosylamido-Z-phenylethyl chloromethyl ketone, an alkylating agent and chymotrypsin-specific protease inhibitor. Addition of this drug to tissue culture cells at concentrations of 20 to 30 c(g per ml results in an irreversible inhi...

(R)-(+)-3,5-dinitro-N-(1-phenylethyl)benzothioamide 1 is a potential chiral solvating agent (CSA) for the spectral resolution of enantiomers via 1H NMR spectroscopy. The single enantiomer was synthesized from commercially available (R)-(+)-a-methylbenzylamine 2 in two steps with 85% yield.

The aim of this study was to evaluate the effects of alginate entrapment on fermentation metabolites of Kluyveromyces marxianus grown in agrowastes that served as the liquid culture media. K. marxianus cells entrapped in Na-alginate were prepared using the traditional liquid-droplet-forming method. Whey and pomaces from processed tomatoes, peppers, and grapes were used as the culture media. The...

The reaction of enantiomerically pure 2-substituted 1-phenylethyl-aziridine with methyl trifluoromethanesulfonate generated a stable methylaziridinium ion, which was reacted with various external nucleophiles, including nitrile, to yield synthetically valuable and optically pure acyclic amine derivatives in a completely regio- and stereoselective manner.

Density functional theory calculations have been employed to model ethene hydroarylation using an [Ir(κ(2)-OAc)(PMe(3))Cp](+) catalyst, 1. The reaction proceeds via: (i) an acetate-assisted C-H activation of benzene via an AMLA-6 transition state; (ii) rate-limiting insertion of ethene into the Ir-Ph bond; and (iii) protonolysis of the β-phenylethyl species by HOAc. A range of competing process...