The dependence of the catalytic activities of α-chymotrypsin on the concentration of organic cosolvents (acetonitrile, dimethyl sulfoxide, dimethyl formamide, ethylene glycol, methanol, ethanol, propan-2-ol and tert-butanol) in mixed aqueous media has been studied towards hydrolysis of p-nitrophenyl acetate and p-nitrophenyl benzoate using cetyltriphenylphosphonium bromide surfactant at pH 7.75...

OBJECTIVES Enzyme/metal-organic framework composites with high stability in protein denaturing solvents were reported in this study. RESULTS Encapsulation of enzyme in metal-organic frameworks (MOFs) via co-precipitation process was realized, and the generality of the synthesis was validated by using cytochrome c, horseradish peroxidase, and Candida antarctica lipase B as model enzymes. The s...

A simple, efficient and eco-friendly procedure for the selective monohydrolysis of diethyl 2,6-dimethyl-4-aryl-4H-pyran-3,5-dicarboxylates under quaternary ammonium salt catalysis conditions is presented. The catalytic activities of various quaternary ammonium salts were investigated using different molar ratios of NaOH and water-organic solvent mixtures. The results indicate that the combinati...

Alkoxy-amino-bis(phenolate) yttrium amide and alkoxide complexes promote the ring-opening polymerization of (3S,6S)-dimethyl-2,5-morpholinedione at 60-100 degrees C via a coordination-insertion polymerization mechanism.

The title mol-ecule, C(13)H(17)NO, is close to planar: the dihedral angle betweent the dimethyl amino group and the benzene ring is 7.94 (19)°. No significant inter-molecular inter-actions are observed in the crystal structure.

A novel avenue for oxazoles via Beckmann rearrangement of alpha-formyl ketoxime dimethyl acetals is described that indicates the possibility of a non-amino acid biosynthetic pathway in marine natural products.

It has been known since 1932 (23) that 4'-amino2,3'-azotoluene will induce liver tumors in rats receiving the dye orally. Later, Kinosita (10) demonstrated the superior carcinogenic activity of an isomeric azo dye, N,N-dimethyl-p-arninoazobenzene, toward the rat liver; this superiority was revealed both in the shorter minimal feeding period and in the shorter latent period. Both these azo dyes ...

It has been known since 1932 (23) that 4'-amino2,3'-azotoluene will induce liver tumors in rats receiving the dye orally. Later, Kinosita (10) demonstrated the superior carcinogenic activity of an isomeric azo dye, N,N-dimethyl-p-arninoazobenzene, toward the rat liver; this superiority was revealed both in the shorter minimal feeding period and in the shorter latent period. Both these azo dyes ...