|标识符号||GHS02, GHS06, GHS08|
In situ assembly of well-dispersed Au nanoparticles on TiO2/ZnO nanofibers: a three-way synergistic heterostructure with enhanced photocatalytic activity.
The TiO(2)/ZnO nanofibers embedded by Au nanoparticles (TiO(2)/ZnO/Au NFs) were fabricated by combining the electrospinning technique (for TiO(2)/ZnO nanofibers) and an in situ reduction approach (for...Read More
Efficiency of biological activator formulated material (BAFM) for volatile organic compounds removal--preliminary batch culture tests with activated sludge.
During biological degradation, such as biofiltration of air loaded with volatile organic compounds, the pollutant is passed through a bed packed with a solid medium acting as a biofilm support. To imp...Read More
Gap junctions (GJs) are membrane-spanning channels that facilitate intercellular communication by allowing small signaling molecules (e.g. calcium ions, inositol phosphates, and cyclic nucleotides) to...Read More
Amine-functionalized polyglycidyl methacrylate microsphere as a unified template for the synthesis of gold nanoparticles and single-crystal gold plates.
Polyglycidyl methacrylate (PGMA) microspheres, crosslinked and surface-functionalized by amine, can be used as a solid-state template for the synthesis of gold (Au) crystals in the forms of either nan...Read More
Nanoaggregates of a pentacenequinone derivative as reactors for the preparation of palladium nanoparticles.
Fluorescent nanoaggregates of pentacenequinone derivative serve as reactors for the preparation of palladium nanoparticles in aqueous medium. Further, the combination of catalytic quantities of palla...Read More
A derivative photoelectrochemical sensing platform for 4-nitrophenolate contained organophosphates pesticide based on carboxylated perylene sensitized nano-TiO(2).
A novel visible light sensitized photoelectrochemical sensing platform was constructed based on the perylene-3,4,9,10-tetracarboxylic acid/titanium dioxide (PTCA/TiO(2)) heterojunction as the photoele...Read More
Simple and direct synthesis of oxygenous carbon supported palladium nanoparticles with high catalytic activity.
A concise synthesis of Pd nanoparticles encapsulated in a sponge-like carbonaceous support (Pd/C) was achieved by mixing a solution containing water, ethylene glycol and Pd(ii) with diphosphorus pento...Read More
Ion-pairing reversed-phase liquid chromatography fractionation in combination with isotope labeling reversed-phase liquid chromatography-mass spectrometry for comprehensive metabolome profiling
We report a novel two-dimensional (2D) separation strategy aimed at improving the detectability of liquid chromatography mass spectrometry (LC-MS) for metabolome analysis. It is based on the use of io...Read More
beta-Glucuronidase in common duct bile, methodological aspects, variation of pH optima and relation to gallstones.
beta-Glucuronidase of human or bacterial origin may deconjugate bilirubin diglucuronide, causing pigment gallstones. Intrinsic interference by biliary compounds must be minimized for accurate assay of...Read More
A dual-template imprinted capsule with remarkably enhanced catalytic activity for pesticide degradation and elimination simultaneously.
A new strategy of reactant-product-dual-template imprinting incorporated with hollow morphology to improve the catalysis efficiency of microspheres was developed. The synthesized capsule can achieve d...Read More
MMP-1 (collagenase-1) and MMP-13 (collagenase-3) differentially regulate markers of osteoblastic differentiation in osteogenic cells.
Previous studies have demonstrated an inverse relationship between constitutive or stimulated collagenase expression and osteoblastic phenotype of osteogenic cells. However, the direct effects of cell...Read More
The Env glycoproteins gp120 and gp41 are used in humoral immunity-based vaccines against human immunodeficiency virus (HIV-1) infection. One among many obstacles to such a vaccine is the structural de...Read More
Leaf-cutting ant fungi produce cell wall degrading pectinase complexes reminiscent of phytopathogenic fungi.
Leaf-cutting (attine) ants use their own fecal material to manure fungus gardens, which consist of leaf material overgrown by hyphal threads of the basidiomycete fungus Leucocoprinus gongylophorus tha...Read More
Adsorption equilibria and kinetics for the adsorption of p-nitrophenol on a phenoxy groups modified hypercrosslinked polystyrene resin.
Adsorption equilibria and kinetics of p-nitrophenol adsorbed on HJ-01 were investigated in this study. The result indicated that phenoxy groups were uploaded on the skeleton of HJ-01 successfully, the...Read More
Silver/iron oxide composite nanoparticles have been synthesized successfully via a facile one-pot green route by the use of l-arginine, which created an aqueous solution of about pH 10 and acted as a ...Read More
Effects of 4-nitrophenol (4NP) on the overall performance of membrane bioreactors (MBRs) were investigated in two bench-scale submerged MBRs. Positive impacts of 4NP on activated sludge production and...Read More
In situ amplified electronic signal for determination of low-abundance proteins coupling with nanocatalyst-based redox cycling.
Platinum-cerium oxide hybrid nanocatalysts (CeO(2)-Pt) were for the first time designed as bionanolabels for highly efficient electrochemical immunosensing of low-abundance proteins coupling nanocatal...Read More
Biogenic robust synthesis of silver nanoparticles using Punica granatum peel and its application as a green catalyst for the reduction of an anthropogenic pollutant 4-nitrophenol.
A robust synthesis of silver nanoparticles (AgNPs) using the peel extract of Punica granatum is reported in this article. The formation of AgNPs was confirmed by the appearance of brownish yellow colo...Read More
The electrochemical degradation of p-nitrophenol (PNP) at boron-doped diamond (BDD) and platinum (Pt) anodes was studied by varying the parameters such as Cl(-) concentration, pH of aqueous medium and...Read More
Multi-wavelength dye concentration determination for enzymatic assays: evaluation of chromogenic para-nitrophenol over a wide pH range.
Enzymatic assays need robust, rapid colorimetric methods that can follow ongoing reactions. For this, we developed a highly accurate, multi-wavelength detection method that could be used for several s...Read More
Catalytic reduction of 4-nitrophenol by silver nanoparticles stabilized on environmentally benign macroscopic biopolymer hydrogel.
The direct use of macroscopic biopolymer alginate hydrogels (AHs) as a green and effective carrier to stabilize silver nanoparticles (Ag NPs) is presented. The Ag@AHs were characterized by UV-vis abso...Read More
Enrichment of two isoflavone aglycones in black soymilk by immobilized β-glucosidase on solid carriers.
A catalytic system for deglycosylation of isoflavone in black soybean milk was established. β-Glucosidase which was covalently immobilized onto the glass microspheres exhibited a significant efficien...Read More
Green synthesis of gold nanoparticles using a glucan of an edible mushroom and study of catalytic activity.
Gold nanoparticles were synthesized by reducing chloroauric acid with a glucan, isolated from an edible mushroom Pleurotus florida, cultivar Assam Florida. Here, glucan acts as reducing as well as sta...Read More
Responsive catalytic hybrid nanogels with Au nanoparticle cores and a polyvinylpyrrolidone (PVP) based gel shell are prepared through a novel one-pot approach. The embedded Au nanoparticles demonstrat...Read More
Influence of nutrient mixtures on p-nitrophenol degradation by Stenotrophomonas sp. isolated from groundwater.
We isolated strain CERAR5, a Stenotrophomonas sp., from an aquifer contaminated with chlorinated hydrocarbons that utilizes up to 1.0 mM PNP within 62 h in M9 medium as a source of carbon and nitrogen...Read More
Novel CeO2 yolk-shell structures loaded with tiny Au nanoparticles for superior catalytic reduction of p-nitrophenol.
Direct fabrication of core-shell or yolk-shell functional nanomaterials via a facile template-free method remains a challenge. In this work, we present a novel approach that involves straightforward c...Read More
Utilization of integrated Michaelis-Menten equations for enzyme inhibition diagnosis and determination of kinetic constants using Solver supplement of Microsoft Office Excel.
Enzyme kinetic parameters are usually determined from initial rates nevertheless, laboratory instruments only measure substrate or product concentration versus reaction time (progress curves). To over...Read More
Effect of common metal ions on the rate of degradation of 4-nitrophenol by a laccase-Cu2+ synergistic system.
Various metal ions are present in industrial wastewater. In this study, the role of Cu(2+) in pollutant degradation by laccase and the effect of common metal ions such as Na(+), K(+), Ca(2+), Mg(2+), ...Read More
Magnetic molecularly imprinted nanoparticles based on grafting polymerization for selective detection of 4-nitrophenol in aqueous samples.
In this study, an analytical procedure for the selective extraction and detection of 4-nitrophenol (4-NP) was investigated by using of molecularly imprinted polymer on the surface of magnetic nanopart...Read More
Molecular modeling and spectral comparison for the change in methyl position of nitrophenol compounds 2-methyl-4-nitrophenol and 3-methyl-4-nitrophenol: a density functional theoretical study.
FT-IR and FT-Raman spectra of 2-methyl-4-nitrophenol (PNOC) and 3-methyl-4-nitrophenol (PNMC) were recorded and analyzed in the solid phase in the region 4000-400 cm(-1) and 3500-50 cm(-1) respectivel...Read More
Comparison of bacterial cells and amine-functionalized abiotic surfaces as support for Pd nanoparticle synthesis.
An increasing demand for catalytic Pd nanoparticles has motivated the search for sustainable production methods. An innovative approach uses bacterial cells as support material for synthesizing Pd nan...Read More
Sulfotransferase is an important enzyme family that catalyses the transfer of a sulfate group from a donor substrate, 3'-phosphoadenosine-5'-phosphosulphate (PAPS), to an acceptor substrate ...Read More
We developed a kinetic assay for calcium in serum and urine, based on the activation of porcine pancreatic alpha-amylase (EC 188.8.131.52) with 2-chloro-4-nitrophenyl-alpha-maltotrioside as substrate. The ...Read More
The mammalian detoxification of certain organophosphates, such as paraoxon [O,O-diethyl (p-nitrophenyl) phosphate], is catalyzed by the enzyme A-esterase. In this study, incubations of human serum in ...Read More
The variability among subjects of the hepatic activities of O-sulphotransferase towards dopamine, p-nitrophenol, testosterone and ethinyloestradiol and of N-sulphotransferase with 1,2,3,4-tetrahydrois...Read More
High-purity 4-nitrophenol: purification, characterization, and specifications for use as a spectrophotometric reference material.
We describe specifications for high-purity 4-nitrophenol, which is suitable for spectrophotometric standardization. Such a reference material is needed in clinical enzymology to establish the proper m...Read More
Phenol sulfotransferase (PST) catalyzes the sulfate conjugation of catecholamines and phenol and catechol drugs. The human blood platelet contains a thermolabile (TL) form of PST that catalyzes the su...Read More
Thermolabile and thermostable human platelet phenol sulfotransferase. Substrate specificity and physical separation.
Human platelets contain at least two forms of phenol sulfotransferase (PST), a thermolabile (TL) form for which dopamine is a substrate and a thermostable (TS) form for which micromolar concentrations...Read More
Localization of human blood phenol sulfotransferase activities: novel detection of the thermostable enzyme in granulocytes.
Phenol sulfotransferases (PSTs) catalyze the sulfate conjugation of catecholamines and a variety of phenolic compounds. Thermolabile and thermostable forms of PST exist in human tissue. Blood componen...Read More
Quantification of phenolic metabolites of environmental chemicals in human urine using gas chromatography-tandem mass spectrometry and isotope dilution quantification
We have developed a method to measure 12 urinary phenolic metabolites of pesticides or related chemicals. The target chemicals for our method are 2-isopropoxyphenol; 2,4-dichlorophenol; 2,5-dichloroph...Read More
Phenotype-genotype relationships of SULT1A1 in human liver and variations in the IC50 of the SULT1A1 inhibitor quercetin.
Human sulfotransferases catalyze sulfate conjugation and 2 polymorphic genes, SULT1A1 and SULT1A2 in this family of transferases have been identified, encoding for 2 isoenzymes with very similar prope...Read More
Interindividual variability of phenol- and catechol-sulphotransferases in platelets from adults and newborns.
1 Phenol- and catechol- sulphotransferase activities were measured with p-nitrophenol and dopamine as substrates in platelets obtained from 100 newborns and 100 healthy adults. 2 Mean +/- (s.d.) estim...Read More
This study presents criteria for assessing the individual pesticide burden of workers in the chemical industry....Read More
Sulfating-activity and stability of cDNA-expressed allozymes of human phenol sulfotransferase, ST1A3*1 ((213)Arg) and ST1A3*2 ((213)His), both of which exist in Japanese as well as Caucasians.
We recently found single amino acid substitutions ((213)Arg/His and (223)Met/Val) in polymorphic human phenol-sulfating phenol sulfotransferase (SULT: cDNAs encoding ST1A3, P PST or HAST1/2) among Cau...Read More
A procedure for the determination of the adhesion of human platelets to protein-coated culture microwells was developed. The number of platelets was quantitated by measuring the activity of acid phosp...Read More