Ammonia-oxidizing bacteria (AOB) can use oxygen and nitrite as electron acceptors. Nitrite reduction by Nitrosomonas is observed under three conditions: (i) hydrogen-dependent denitrification, (ii) anoxic ammonia oxidation with nitrogen dioxide (NO(2)) and (iii) NO(x)-induced aerobic ammonia oxidation. NO(x) molecules play an important role in the conversion of ammonia and nitrite by AOB. Absen...

Previous papers in this series have reported the hypoxanthinedependent oxidation of sulfite by cyanide-inhibited xanthine oxidase (1) and experiments which permitted postulation of the structure of the active site of this enzyme (2). In the present study, xanthine oxidase acting on its substrates has been found to initiate the aerobic oxidation of sulfite by free radical chains of great length ...

Metabolic interventions improve performance during demand-induced ischemia by reducing myocardial lactate production and improving regional systolic function. We tested the hypotheses that 1) stimulation of glycolysis would increase lactate production and improve ventricular wall motion, and 2) the addition of fatty acid oxidation inhibition would reduce lactate production and further improve c...

an efficient synthetic method for successful synthesis of amine denderon on sba-15 and related pd (ii) complex has been developed. this modified mesoporous material was characterized by various techniques such as tem, xrd, atomic absorption spectroscopy, n2 adsorption-desorption, and ft-ir. the catalytic activities of the prepared catalysts were investigated by employing aerobic oxidation of al...

The widespread detection of environmentally persistent perfluorinated acids (PFCAs) such as perfluorooctanoic acid (PFOA) and its longer chained homologues (C9>C15) in biota has instigated a need to identify potential sources. It has recently been suggested that fluorinated telomer alcohols (FTOHs) are probable precursor compounds that may undergo transformation reactions in the environment lea...

We report the application of statistical multivariate analysis to optimize the process parameters (including temperature, O2 pressure, concentration of benzyl alcohol, Mn content, and K:Mn molar ratio) in the oxidation of benzyl alcohol using molecular oxygen over K-Mn/C catalysts. This multi-regression model, based on 38 experimental runs, shows reasonably accurate prediction on the benzyl alc...

A multipolymer reaction system has been developed in which a water-soluble polymer-supported 2,2'-bipyridine group and a similarly immobilized TEMPO derivative are used as ligands for copper to effect the mild and selective aerobic oxidation of primary alcohols in acetonitrile-water solvent. In this reaction system, poly(ethylene glycol) monomethyl ether (molecular weight = 5000 Da) was used as...

Two solutions, one consisting of bpy/TEMPO/NMI and the other bpy/ABNO/NMI (bpy =2,2'-bipyridyl; TEMPO = 2,2,6,6-tetramethylpiperidine N-oxyl, ABNO = 9-azabicyclo[3.3.1]nonane N-oxyl; NMI = N-methylimidazole), in acetonitrile are shown to have good long-term stability (≥1 year) under air at 5 °C. The solutions may be combined in appropriate quantities with commercially available [Cu(MeCN)4]OTf t...