Formation of hydride-Meisenheimer complexes of picric acid (2,4,6-trinitrophenol) and 2,4-dinitrophenol during mineralization of picric acid by Nocardioides sp. strain CB 22-2

Article Abstract:

A strain that was able to use picric acid as a sole source of carbon and energy at certain concentrations and rates in continuous cultures was isolated and characterized for the first time. A Nocardioides sp. strain, CB 22-2 completely mineralizes picric acid with intermediate formation of the (H(super -))-Meisenheimer complexes (2,4,6-trinitrophenol) (H(super -)-TNP) and 2,4-dinitrophenol (H(super -)-DNP). The strain was also found to be able to use picric acid as a sole source of nitrogen at comparable rates in a nitrogen-free medium.

Aromatic compounds

Stability and performance of Xanthobacter autotrophicus GJ10 during 1,2-dichloroethane biodegradation

Article Abstract:

A nucleic acid-based approach was used to investigate the dynamics of microbial community dominated by Xanthobacter autotrophicus GJ10 in the degradation of synthetic wastewater containing 1,2-dichloroethane (DCE). The study was performed over a 140-day period in a nonsterile continuous stirred tank bioreactor (CSTB) subjected to different operational regimens such as nutrient limiting conditions, baseline operation and the introduction of glucose as a cosubstrate.

All Other Basic Organic Chemical Manufacturing, Industrial Organic Chemicals, Ethylene Dichloride, Methods, Analysis, Genetic aspects, In situ hybridization, Chemical properties, Autotrophs

Evidence of substantial carbon isotope fractionation among substrate, inorganic carbon, and biomass during aerobic mineralization of 1,2-dichloroethane by Xanthobacter autotrophicus

Article Abstract:

Carbon isotope fractionation can be used to detect microbial breakdown of 1,2-dichloroethane in groundwater. This technique relies on the fact that biotic transformation often involves a kinetic isotope effect whereby the precursor and product have different isotope ratios.

Fractionation, Fractional distillation