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Showing 1 to 20 of 20 for “"p-nitrophenol"”.
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Human Cytochrome P450 2E1: Functional Comparison to Cytochrome 2A13 and 2A6
… the reportedly selective CYP2E1 substrates p-nitrophenol (pNP) [2] and chlorzoxazone (CZN) [3], but none showed significant differences in activity from the CYP2E1 wild type enzyme. However, in contrast to previous literature reports [4], both CYP2A6 and CYP2A13 were observed to metabolize …
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Structural studies of some copper(II) coordination compounds
… copper(II) and p-nitrophenol and chloroform adducts of NN’-ethylenebis-(salicylaldiminato) copper(II) have indicated that the bonding requirements of the copper atom can be modified by hydrogen bonding involving a ligand atom.
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Synthesis and surface chemistry of zinc oxide nanowires for chemical sensor applications
… nanowires for highly sensitive and selective p-nitrophenol vapor sensor. High-quality ZnO nanowires were synthesized through a vapor-liquid-solid process in a customized chemical vapor deposition furnace. Scanning electron microscopy, transmission electron microscopy, x-ray diffraction, and …
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Degradation Of Selected Organic Agrochemicals In Artificial Soil Slurry Systems By Anodic Fenton Treatment
… mecoprop, paraquat, 4.6-odinitrocresol, p-nitrophenol and dinoseb, were studied. The results indicate that humic acid content is the key factor that slows down pesticide degradation, most probably due to its pH buffering and adsorption capacity. A kinetic model, which was shown to fit the …
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Green Synthesis and Evaluation of Catalytic Activity of Sugar Capped Gold Nanoparticles
… in shape and in the size range of 10 ± 5 nm. p-Nitrophenol reduction assay was used as a model system to determine the catalytic reduction activity of various sugar capped GNPs, monosaccharides (fructose), disaccharide (sucrose) and trisaccharide (raffinose) GNPs. The effect of temperature and …
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Structural studies of supramolecular host-guest systems
… carboxylates, perfluoroalkyl sulfonate, and p-nitrophenol (PNP) at variable experimental conditions. In the first theme (chapter 2-5), host-guest complexes in the solid state were prepared using dissolution and slow cool methods at variable host/guest mole ratios (i.e., 1:1 and 2:1). The …
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Soil phosphatases: factors affecting enzyme activity in Arctic tussock tundra and Virginia mineral soils
… in the same soil. Three hundred to 700 µg p-nitrophenol ·g⁻¹ h⁻¹ were released by Arctic soils incubated at 0°C; levels increased as temperature increased. K<sub>m<sub>app</sub></sub> (v: v/S regression analysis) ranged from 1.57 to 2.91 mM (Arctic) and 2.11 to 3.23 mM (Virginia). …
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The effects of different levels of dietary protein on the toxicity and metabolism of malathion and parathion and their oxygen analogues
… Metabolism studies· based on excretion of p-nitrophenol, a metabolite of parathion and paraoxon, were largely inconclusive. It is concluded from these studies that dietary protein intake is of major importance in determining the toxicities of malathion and parathion and their oxygen analogues …
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The Effect of 48 hr Glucose Administration on the Hepatic P-450 System
… the in vitro conversion of p-Nitrocellulose to p-Nitrophenol.</p> <p>The administration of glucose to rats for 48 hrs resulted in prolonged anesthesia after the administration of pentobarbital. The spectral binding of hexobarbital and methadone to hepatic microsomal P-450 was found to be …
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The Role of 5' Nucleotidase in the Regulation of Morphogenesis in Dictyostelium Discoideum
… the 5NU protein using an artificial substrate p-nitrophenol phosphate (pNPP). An activity stain on non-denaturing gels with Nitro Blue Tetrazolium (NBT) and 5-Bromo-4-Chloro-3-Indolyl Phosphate (BCIP) as the substrate was also used. A polypeptide of approximately 90 kDa was associated with 5NU …
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Competitive Enzyme Immunoassay by Polyclonal Antibodies Against Organophosphorus Pesticides
… secondary metabolites (dimethyl phosphite, p-nitrophenol, ethyl propionate and methyl isobutyrate) to the antibodies, two of the immunoassay tests were conducted to be nonspecific which enabled them to act as a general screening method for OPs.</p> <p>The assays of these four classes of OPs …
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Determination of Pancreatic and Salivary Amylase By Enzyme Immunoassay and Their Prevalence in Hyperamylasemic Patients
… change in NADH absorbance at 280 nm or of the p-nitrophenol released from a maltotetrose substrate. These are nonspecific measurements of pancreatic amylase and often necessitate other tests to be run such as a serum lipase.</p> <p>The two predominant isoenzymes of amylase are pancreatic …
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Surface Modification of Spherical Particles with Bioactive Glycopolymers
… hybrid particles that were capable of reducing p-nitrophenol in the presence of NaBH4. Investigation of the interactions between acetylglucosamine-displaying polymers and a series of lectins revealed a selective binding towards the lectin wheat germ agglutinin (WGA) whereby the binding affinity of …
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Fabrications and Applications of Protein-based Bionanocomposites
… the reduction reaction to convert pollutant p-nitrophenol (PNP) to p-aminophenol (PAP), with a great increase in their lifetime use from 2 to 10 reaction cycles. The second fabrication method utilizes the zwitterionic property of the protein based ESM for binding with Ag nanoparticles to form …
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NEW GO- AND RGO-BASED MORALS AND CARBENE-FUNCTIONALIZED GOLD NANOPARTICLES FOR HETEROGENEOUSLY CATALYZED REDUCTIONS
… materials were evaluated in the reduction of p nitrophenol. Comparing the catalytic behavior of the functionalized and unfunctionalized systems allowed for a deeper understanding of the role of NHCs in modulating hydrogen mobility and reactivity.
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Characterisation of glycosidase enzymes of wine lactic acid bacteria
… of glycosidase activities using artificial (p-nitrophenol- linked) substrates, b) an investigation of the enzymatic effect of LAB on wine anthocyanins, and c) identification and cloning of a putative β-glucosidase gene from Oenococcus oeni. From this work it was clear that all O. oeni strains …
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Immobilisation of Bio-molecules on Magnetisable Solid Supports for Applications in Bio-catalysts and Bio-sensors
… palmitate to produce palmitic acid and p-nitrophenol (model reaction), (ii) transesterification of ethyl butyrate with n-butanol to produce butyl butyrate and (iii) partial and selective hydrolysis of cis-3,5-diacetoxy-1-cyclopentene to produce pharmaceutically important and expensive …
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Understanding the Chemistries of Ni-rich Layered Oxide Materials for Applications in Lithium Batteries and Catalysis
… support on the gold (Au) nanocatalyst for p-nitrophenol reduction to p-aminophenol. By obtaining a continuum of nickel (Ni) oxidation states using delithiation strategies, structural-activity relationship trends are provided. Conversion rates for each of the delithiated materials was …
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Développement d'un photocatalyseur à base d'oxyde de titane pour l'élimination de polluants et de bactéries en milieu aqueux
Dans le cadre de la réutilisation des eaux usées et de l’accès limité à l’eau potable dans certaines régions du globe, de nouvelles techniques d’épuration nécessitant de faibles consommations d’énergie sont étudiées. Parmi ces nouvelles techniques, la photocatalyse hétérogène utilise des réactions …
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Mechanisms of polyphosphate degradation
The goal of my research has been to investigate the mechanisms by which inorganic polyphosphate (polyP) is degraded in vivo. PolyP is a linear chain of phosphate moieties linked through high-energy phosphoanhydride bonds and can range in size from three-phosphates-long to thousands. Naturally, …