نتایج جستجو برای: alkylphenols
تعداد نتایج: 298 فیلتر نتایج به سال:
4-ethylphenol methylenehydroxylase from Pseudomonas putida JD1 acts by dehydrogenation of its substrate to give a quinone methide, which is then hydrated to an alcohol. It was shown to be active with a range of 4-alkylphenols as substrates. 4-n-propylphenol, 4-n-butylphenol, chavicol, and 4-hydroxydiphenylmethane were hydroxylated on the methylene group next to the benzene ring and produced the...
Among the Basidiomycetes the species of the genus Coprinus have black spores and hymenia that, at maturity, are transformed through autodigestion into a black or inky fluid that drops from the pileus and blackens the soil beneath the fruiting structures. The melanins from three different species of Coprinus have been characterized by spectroscopic techniques, including cross-polarization, magic...
Alkylphenols can affect human health because they disrupt the endocrine system. In this study, an analytical method for determining trace amounts of 4-nonylphenol (NP) and 4-octylphenol (OP) in human blood samples was developed. Reversed-phase HPLC with multi-electrode electrochemical coulometric-array detection was used for the determination of NP and OP in plasma and serum samples prepared wi...
In manure, the endocrine disruptors may have a dual source: as natural metabolites of the steroidal hormones present in the manure deposed by farm animals or of synthetic origin as the alkylphenols used for a variety of applications and consumer products. In particular, the EDC with estrogen-like activity cause a number of issues mainly related to the male fertility. This study aims to ascertai...
Snowmelt is known to cause peak concentrations of pollutants, which may adversely affect receiving water quality. High concentrations of metals and suspended solids in snow have been reported, whereas studies on organic pollutants are rare. This study aims at investigating the occurrence of anthropogenic organic compounds in urban snow in Gothenburg (Sweden). The most frequently detected organi...
The influence of reaction conditions on the composition of liquid products during two-stage hydrothermal conversion of alkali lignin has been investigated in a batch reactor. Reactions were carried out in the presence of formic acid (FA) and Pt/Al2O3 catalyst. The two different sets of reaction conditions involved alternative reaction times of 1h and 5h at 265°C and 350°C, respectively. These p...
In this study, a polymer, prepared by crosslinking cyclodextrin (CD) by means of a polycarboxylic acid, was used for the removal of pollutants from spiked solutions and discharge waters from the surface treatment industry. In spiked solutions containing five metals, sixteen polycyclic aromatic hydrocarbons (PAH) and three alkylphenols (AP), the material exhibited high adsorption capacities: >99...
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