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  • mechanism
  • The ability to quench singlet oxygen seems to be in relation with the chemical structure of catechin, with the presence of the catechol moiety on ring B and the presence of a hydroxyl group activating the double bond on ring C. Electrochemical experiments show that (+)-catechin oxidation mechanism proceeds in sequential steps, related with the catechol and resorcinol groups and the oxidation is pH-dependent. (wikipedia.org)
  • carbon
  • 1,2-CTD uses Fe3+ as a cofactor to cleave the carbon-carbon bond between the phenolic hydroxyl groups of catechol, thus yielding muconic acid as its product. (wikipedia.org)
  • In contrast, 2,3-CTD utilizes Fe2+ as a cofactor to cleave the carbon-carbon bond adjacent to the phenolic hydroxyl groups of catechol, thus yielding 2-hydroxymuconaldehye as its product. (wikipedia.org)
  • Six species of free-living nitrogen fixing bacteria, Azomonas agilis, Azospirillum brasilense, Azospirillum lipoferum, Azotobacter chroococcum, Azotobacter vinelandii , and Beijerinckia mobilis , were surveyed for their ability to grow and fix N 2 using aromatic compounds as sole carbon and energy source. (springer.com)
  • strain Rue61a is an isolate from sewage sludge able to utilize quinaldine (2-methylquinoline) as sole carbon and energy source. (biomedcentral.com)
  • strain
  • The 16S rDNA analysis revealed 99% nucleotide similarity to that of the type strain of R.rhodochrous (Fig. 2) ( 10 ). (kenyon.edu)
  • strain O-1 with subsequent meta ring cleavage and spontaneous desulphonation to 2-hydroxymuconic acid. (genome.jp)
  • ligand
  • All heteroatoms (N3O) of the ligand are coordinated to the iron center in complex 1 with two pyridine nitrogen atoms on the axial bonds, while one of the pyridyl arms of the ligand is left uncoordinated in complex 2. (diva-portal.org)
  • Complex 1 displays the intradiol-cleaving dioxygenase activity, and the coordinate ethoxyl arm of the ligand is capable of accepting the proton from catechol, which mimics the function of Tyr447 in the. (diva-portal.org)
  • biphenyl
  • Fig. 4 Aerobic bacterial degradation of biphenyl ( http://umbbd.msi.umn.edu/ ). (alpfmedical.info)
  • 2006). Two cis-dihydrodiol dehydrogenases BphB1 and BphB2, which are encoded on pRHL1 and pRHL2, respectively, catalyze the second step in biphenyl catabolism, i.e., the rearomatization of the cis-dihydrodiol to form 2,3-dihydroxybiphenyl. (alpfmedical.info)
  • activity
  • The spectrop h oto metric titration experiment indicates the relatively low demand of the external base (0.8 equiv based on Fe3+) for attaining the highest dioxygenase activity of complex 1. (diva-portal.org)
  • iii) Lignin is a complex organic biopolymer mainly present in plants in close association with carbohydrates like cellulose and hemicellulose, its main activity is to provide plants with structural stability, impermeability and resistance towards microbial attack [ 3 ]. (ijbs.com)
  • acid
  • L-phenylalanine is first deaminated by phenylalanine ammonia lyase (PAL) forming cinnamic acid which is then oxidized to 4-hydroxycinnamic acid by cinnamate 4-hydroyxylase. (wikipedia.org)
  • Glycosyl is present as the acyl type in the beta-1,4-N acetylmuramic acid. (kenyon.edu)