Structural water molecules adsorbed on Au nanoparticles in the form of {OH − ·H 2 O@Au NPs} were identified as catalytical-active sites 4-nitrophenol reduction, which is extremely sensitive to subtle changes surrounding microenvironment.

The mammalian glucoside-conjugation pathway was studied by using p-nitrophenol as the model substrate and mouse liver microsomal preparations as the source of enzyme. The microsomal preparations supplemented with UDP-glucose glucosylated p-nitrophenol; p-nitrophenyl glucoside was identified by chromatography in six solvent systems. The unsolubilized glucosyltransferase of fresh microsomal prepa...

Lattice distortion in AgPt nanoparticles was studied using X-ray diffraction and other techniques. These nanoparticles show high catalytic activity in the reduction of p-nitrophenol and had a turn over frequency of 5.4 × 10(2) s(-1).

Nitrophenolic compounds are hazardous substances, listed as priority pollutants by World Health Organization, due to their toxicity on both the environment and human health. They used in agriculture insecticides fungicides they can contaminate water reserves filtering through soil into groundwater. Therefore, these substances must be removed from agricultural wastewater before being discharged....

We have previously described a sensitive bacterial test for dectecting carcinogens as mutagens. We have previously described a sensitive bacterial test for detecting carcinogens as mutagens. We show here that 89% (150/169) of commercial oxidative-type (hydrogen peroxide) hair dye formulations are mutagenic in this test. Of the 18 components of these hair dyes, nine show various degrees of mutag...

The spectral characteristics of lactose repressor protein modified with two nitrophenol reporter groups have been determined. Reaction of Z-chloromercuri-4nitrophenol with repressor increases the apparent pK of the nitrophenol from 6.75 to 8.3 and alters the wavelength of maximum absorption. Subsequent binding of inducer shifts the apparent pK toward slightly more acid pH. The pK values of the ...

The green synthesis of silver nanoparticles is a rapid and environmentally friendly technique (AgNPs). Silver ions are bioreduced into AgNPs by compound found in Skimmiaanquetilia's aqueous leaf extract, which consists primarily alkaloids coumarins. were synthesized characterized multiple techniques, including ultraviolet-visible spectroscopy, Fourier transform infrared analysis, scanning elect...

An ortho-nitrophenol solution was injected into the intestine which had been removed from an anesthetized mouse by placing a ligature at the duodenum and at the rectum. The intestine was then incubated in Ringer's solution at 37•Ž and the ortho-nitrophenol was found to be reduced to ortho aminophenol. At the same time, it was found that ortho-nitrophenol which was incubated with the intestinal ...

A mixed microbial culture was adapted to growth on parathion to determine the feasibility of using microorganisms to detoxify concentrated parathion in agricultural wastes. In a 600-ml chemostat, the culture was able to degrade 50 mg of parathion per liter per h. Para-nitrophenol, produced by enzymatic hydrolysis of parathion, caused delays in exponential growth which were directly proportional...