In order to better understand how to prevent enzymatic greenning, it is important to understand  kinetic properties of polyphenol oxidase.  we investigated the effect of SDS on the rate of catechol oxidation by small cherry tomato partial purified PPO. PPO activity increased with increasing SDS concentration. The most effective concentration of SDS was 0.8, 1 and 1.25 mM in according to pH and ...

S t u d y s e l e c t i o n a n d a s s e s s m e n t Studies were selected if they were randomized controlled trials (RCTs) of pharmacologic (dopamine agonists [DAs] plus L-dopa, selegiline plus L-dopa, or catechol O-methyl transferase [COMT] inhibitors plus L-dopa vs L-dopa alone), psychiatric (piracetam or citalopram vs placebo), surgical (pallidotomy, deep brain stimulation [DBS], and fetal...

It is shown that bacteria Bradyrhizobium japonicum 273 were capable of degrading phenol at moderate concentrations either in a free cell culture or by immobilized cells on granulated activated carbon particles. The amount degraded was greater an preparation than culture. application constant electric field during cultivation led to enhanced biodegradation and carbon. highest removal efficiency ...

Catechol-O-methyl transferase (COMT) gene variants are involved in different neuropsychiatric disorders and cognitive impairments, associated with altered dopamine function. This study investigated the genotypic haplotypic association of COMT rs4680 rs4618 polymorphisms severity other clinical symptoms 544 male 385 female subjects schizophrenia. rs4818 G carriers were more frequent patients mil...

(-)-Epigallocatechin gallate (EGCG) and (-)-epigallocatechin (EGC) are the major polyphenolic constituents in green tea. In this study, we characterized the enzymology of cytosolic catechol-O-methyltransferase (COMT)-catalyzed methylation of EGCG and EGC in humans, mice, and rats. At 1 microM, EGCG was readily methylated by liver cytosolic COMT to 4"-O-methyl-EGCG and then to 4',4"-di-O-methyl-...

Pseudomonas sp. strain JS6 grows on chlorobenzene, p-dichlorobenzene, or toluene as a sole source of carbon and energy. It does not grow on p-chlorotoluene (p-CT). Growth on glucose in the presence of p-CT resulted in the accumulation of 4-chloro-2,3-dihydroxy-1-methylbenzene (3-chloro-6-methylcatechol), 4-chloro-2,3-dihydroxy-1-methylcyclohexa-4,6-diene (p-CT dihydrodiol), and 2-methyl-4-carbo...