نتایج جستجو برای: aminophenol
تعداد نتایج: 862 فیلتر نتایج به سال:
There is now ample evidence that the oral administration of aspirin leads to an increase in faecal blood loss in the majority of normal people. Some investigators (Lange, 1957; Alvarez and Summerskill 1958; Stubbe, Pietersen, and Van Heulen, 1962) have used chemical means of testing for occult blood in faeces, and others (Matsumoto and Grossman, 1959; Watson and Pierson, 1960; Holt, 1960; Scott...
measured by CO-reduced difference spectroscopy (Omura & Sato, 1964) was retained on this column. The concentrated CM-cellulose eluate was dialyzed to pH7.4, and then applied to a DEAE-Sephadex or QAE [diethyl-(2-hydroxypropyl)aminoethyl]-Sephadex column. Peak I eluted from the DEAE-Sephadex exhibited UTP-glucuronyltransferase activity. UDP-glucuronyltransferase activity towards various substrat...
The inner surface of a metallic tube (i.d. 0.5 mm) was coated with a palladium (Pd)-based thin metallic layer by flow electroless plating. Simultaneous plating of Pd and silver (Ag) from their electroless-plating solution produced a mixed distributed bimetallic layer. Preferential acid leaching of Ag from the Pd-Ag layer produced a porous Pd surface. Hydrogenation of p-nitrophenol was examined ...
We have developed a sandwich-type enzyme-linked DNA sensor as a new electrochemical method to detect DNA hybridization. A partially ferrocenyl-tethered poly(amidoamine) dendrimer (Fc-D) was used as an electrocatalyst to enhance the electronic signals of DNA detection as well as a building block to immobilize capture probes. Fc-D was immobilized on a carboxylic acid-terminated self-assembled mon...
−Various substituted phenols and phenylenediamines were enzymatically polymerized by horseradish peroxidase in 80% (v/v) organic solvents-aqueous buffer (100 mM sodium acetate, pH 5) mixtures with H2O2 as the oxidant. The thermal stability of the polymers was investigated by thermogravimetric analysis (TGA) and represented by the char yield (wt% of the initial polymer mass) after being heated a...
The reduction of 4-nitrophenol to 4-aminophenol by borohydride is one of the foremost model catalytic reactions because it allows for a straightforward assessment of catalysts using the kinetic parameters extracted from the real-time spectroscopic monitoring of an aqueous solution. Crucial to its standing as a model reaction is a comprehensive mechanistic framework able to explain the entire ti...
Gene expression profiling is a widely used technique with data from the majority of published microarray studies being publicly available. These data are being used for meta-analyses and in silico discovery; however, the comparability of toxicogenomic data generated in multiple laboratories has not been critically evaluated. Using the power of prospective multilaboratory investigations, seven c...
BACKGROUND Occupational contact dermatitis among hairdressers is frequent, owing to daily exposure to irritants and allergens. OBJECTIVES To identify sensitization to the most common allergens associated with the occupation of hairdressing. METHODS Patch test results of 399 hairdressers and 1995 matched controls with contact dermatitis, registered by the Danish Contact Dermatitis Group betw...
In the current study, poly(p-aminophenol) (PpAP), with starch and graphene oxide (GO), was successfully synthesised by oxidative polymerisation from p-aminophenol monomer in an aqueous alkaline medium using ammonium persulfate (APS) as oxidising agent. The polymers were characterised UV–Vis spectroscopy, Fourier transform infrared thermogravimetric analysis, X-ray diffraction (XRD), Brunauer–Em...
Self-organization by selection is implemented in the generation of a tetranuclear [2 x 2] grid-type metallosupramolecular architecture from its components. It occurs through a two-level self-assembly involving two dynamic processes: reversible covalent bound connection and reversible metal ion coordination. Thus, mixing the aminophenol 3, the dialdehyde 4, and zinc acetate generates the grid co...
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