نتایج جستجو برای: alkylphenols
تعداد نتایج: 298 فیلتر نتایج به سال:
Estrogenic activity in environmental samples could be mediated through a wide variety of compounds and by various mechanisms. High-affinity compounds for estrogen receptors (ERs), such as natural or synthetic estrogens, as well as low-affinity compounds such as alkylphenols, phthalates, and polychlorinated biphenyls are present in water and sediment samples. Furthermore, compounds such as polyc...
Flash pyrolysis-gas chromatography/mass spectrometry(Py-GC/MS) was used to study the structural transformations of humic fractions formed as a result of composting processes of diverse organic materials (solid wastes of wineries, solid olive-mill wastes, domestic wastes, ovine manures plus straw, and mixtures of animal manures). Sodium hydroxide-extracted total humic-like extracts (THE; humic p...
A routine method is described for quantitative determination of 4-nonylphenol (NP), 4-nonylphenol monoethoxylate (NP1EO) and 4-nonylphenol diethoxylate (NP2EO) in sludge samples. A Soxtec extraction procedure was used to enrich target compounds from the solid matrix. Quantitative determinations were performed by high speed gas chromatography/mass spectrometry using a short apolar fused silica c...
Technical lignins are an attractive and renewable source for the production of aromatic chemicals. However, efficient depolymerization technical to valuable low-molecular-weight chemicals is challenging due its recalcitrant nature. Here, we report use nonprecious metal-based, monometallic Ni (prereduced) bimetallic NiMo (in situ sulfided) catalysts supported on mesoporous alumina, either as suc...
Tree nuts contain an array of phytochemicals including carotenoids, phenolic acids, phytosterols and polyphenolic compounds such as flavonoids, proanthocyanidins (PAC) and stilbenes, all of which are included in nutrient databases, as well as phytates, sphingolipids, alkylphenols and lignans, which are not. The phytochemical content of tree nuts can vary considerably by nut type, genotype, pre-...
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