3,4-Dihydro-3-methyl-6-nitro-2H-1,3-benzoxazin-2-one ('DMNB') reacts with cytoplasmic aldehyde dehydrogenase in a similar way to that previously observed with the structurally related p-nitrophenyl dimethylcarbamate, but provides a covalently linked p-nitrophenol-containing reporter group at the enzyme's active site. The pKa of the enzyme-linked reporter group is much higher than that of free p...

One of the central topics in environmental bioremediation research is to identify microorganisms that are capable of degrading the contaminants of interest. Here we report application of combined microautoradiography (MAR) and fluorescence in situ hybridization (FISH). The method has previously been used in a number of systems; however, here we demonstrate its feasibility in studying the degrad...

Rigid dendrimers with flexible ferrocenyltriazolyl termini serve as excellent supports for remarkably efficient and recyclable Pd Au nanocatalysts biphasic reduction of 4-nitrophenol to 4-aminophenol at 20 °C.

This manuscript describes the preparation and characterization of silica-nickel oxide (SiO2-NiO) xerogel nanocomposite its catalytic application in hydrogenation p-nitrophenol. Hydrochloric acid ammonium hydroxide were used as base catalyst, respectively during synthesis SiO2-NiO. The Fourier Transformation Infra-Red spectroscopic results supported formation silica skeleton structure with corre...

Magnetic FeNi@Ni nanocables were prepared as a superior recyclable catalyst towards the hydrogenation reduction of p-nitrophenol to p-aminophenol through a two-step tunable assembly process in a solvothermal system. The proposed fabrication mechanism was verified through characterization by SEM, TEM, XRD, XPS, and UV-Vis. The as-prepared FeNi@Ni nanocomposites are core-shell-structured nanocabl...

A sequencing batch reactor (SBR) was inoculated with p-nitrophenol-degrading activated sludge to biodegrade a mixture of monosubstituted phenols: p-nitrophenol (PNP), PNP and o-cresol; and PNP, o-cresol and o-chlorophenol. Settling times were progressively decreased to promote biomass granulation. PNP was completely biodegraded. The PNP and o-cresol mixture was also biodegraded although some tr...

Bioelectrochemical system (BES) for recalcitrant p-nitrophenol (PNP) removal was investigated in this study. Effective removal of PNP at rates up to 9.14 ± 0.48 mol m(-3)d(-1) was achieved at an energy consumption as low as 0.010 ± 0.002 kWh mol(-1) PNP. PNP removal rate was enhanced with negative cathode potential, increased influent PNP concentration and shortened hydraulic retention time (HR...