Biotransformations of a series of ortho-, meta- and para-substituted ethylbenzene and propylbenzene substrates have been carried out, using Pseudomonas putida UV4, a source of toluene dioxygenase (TDO). The ortho- and para-substituted alkylbenzene substrates yielded, exclusively, the corresponding enantiopure cis-dihydrodiols of the same absolute configuration. However, the meta isomers, genera...

Photodegradation of herbicide 2,4,5-trichlorophenoxyacetic acid (2,4,5-T) in aqueous solution was investigated by stationary (254 nm) and nanosecond laser (266 nm) flash photolysis techniques. It was shown that in the primary photochemical step both photoionization (which generates a hydrated electron-radical cation pair) and heterolytic cleavage of a C-Cl bond takes place. The major products o...

The aim of the work is to investigate the ability of higher plants to absorb and detoxify environmental pollutants - aromatic compounds via aromatic ring cleavage. Transformation of 14C specifically labelled benzene derivatives, [1-6-14C]-nitrobenzene, [1-6-(14)C]-aniline, [1-(14)C]- and [7-(14)C]-benzoic acid, in axenic seedlings of maize (Zea mays L.), kidney bean (Phaseolus vulgaris L.), pea...

Three multidentate ligands, L₁-L₃, derived from bis(pyridin-2-ylmethyl)amine (L₁) were synthesized. Reaction of these ligands with FeCl3·6H2O in methanol led to the formation of the iron complexes Fe₁-Fe₃ (Fe₁: [FeL₁Cl3]; Fe₂: [FeL₂Cl3]; Fe₃: [FeL₃Cl3]) in good yields. These complexes have been fully characterized. The structures of complexes Fe₁-Fe₃ have been determined using X-ray single crys...

Four copper(ii) complexes with multidentate ligands, ([CuL1Cl2]), ([Cu(HL2)Cl2]), ([Cu2(L2)2](ClO4)2) and ([CuL3(HOCH3)ClO4]) {L1 = N,N-bis((pyridin-2-yl)methyl) prop-2-yn-1-amine, HL2 = 2-((((1-methyl-1H-imidazol-2-yl)methyl)(pyridin-2-ylmethyl)amino)methyl)phenol and HL3 = 2-((((1-methyl-1H-imidazol-2-yl)methyl)(pyridin-2-ylmethyl)amino)methyl)-2-t-butyl-phenol} are reported. The complexes we...

In order to improve the issue which possessed weakness in cumene method, a heterojunction catalyst based on Fe(Ⅱ)-MOF/g-C3N4 was synthesized via in-situ synthesis method. The combination of Fe(Ⅱ)-MOF...

Estradiol is converted to catechol estrogens via 2- and 4-hydroxylation by cytochrome P450 enzymes. 4-Hydroxyestradiol elicits biological activities distinct from estradiol, most notably an oxidant stress response induced by free radicals generated by metabolic redox cycling reactions. In this study, we have examined 2- and 4-hydroxylation of estradiol by microsomes of human uterine myometrium ...

Departament de Qúımica, Universitat Aut Spain. E-mail: [email protected] Laboratorio de Catálisis Homogénea, Unid Investigación en Qúımica Sostenible, Dep Huelva, 21007 Huelva, Spain. E-mail: perez Hylleraas Quantum Molecular Sciences, Dep P.O. Box 1033 Blindern, N-0315 Oslo, Norw † Electronic supplementary information (E details and mechanistic procedures, inclu gures (Fig. S1–S25), comp...