Results 311 to 320 of about 94,529 (359)
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Hydroxyl free radical reactivity toward aqueous chlorinated phenols
Water Research, 2005Second-order kinetic constants (k(OH,S)) for the hydroxyl free radical attack on a series of nine chlorophenols (2-chlorophenol, 2,4-dichlorophenol, 2,5-dichlorophenol, 2,4,5-trichlorophenol, 2,4,6-trichlorophenol, 2,3,5,6-tetrachlorophenol, 2,3,4,5-tetrachlorophenol, 2,3,4,6-tetrachlorophenol, and pentachlorophenol) in aqueous solution were determined
Julio A, Zimbron, Kenneth F, Reardon
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Evaluation of the Phenol-Free Glycosyl-Glucose Determination
American Journal of Enology and Viticulture, 2000Published ...
Zoecklein, Bruce W. +2 more
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Reducing the contents of free phenol and formaldehyde in phenolic foam
Journal of Applied Polymer Science, 2003AbstractThe problem of overly high contents of remnant monomers (free phenol and free formaldehyde) in phenolic foam was studied. Free phenol was characterized by iodimetry, and free formaldehyde was characterized by a hydroxylamine hydrochloride method.
Li, WL, Lin, Q, Yan, MF, Zou, YS
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Food Chemistry, 2021
The free, esterified and bound forms of 37 phenolic compounds (including hydroxybenzoic acid, hydroxycinnamic acids, flavanols, flavonols and flavones) from walnut kernel (Juglans regia L.) were investigated in this study. Results showed that the majority of walnut phenolics were presented in the free form (51.1%-68.1%), followed by bound (21.0%-38.0%)
Shutian, Wu +7 more
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The free, esterified and bound forms of 37 phenolic compounds (including hydroxybenzoic acid, hydroxycinnamic acids, flavanols, flavonols and flavones) from walnut kernel (Juglans regia L.) were investigated in this study. Results showed that the majority of walnut phenolics were presented in the free form (51.1%-68.1%), followed by bound (21.0%-38.0%)
Shutian, Wu +7 more
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Free radical oxidation of dihydric phenols with diphenylpicrylhydrazyl
Talanta, 1967A spectrophotometric study has been made of the reactions between the free radical 2,2-dipheny1-1-picrylhydrazyl (DPPH) and the three dihydric phenols. It has been shown that water affects the rate of all three reactions and the stoichiometry of the DPPH-catechol (pyrocatechol) reaction.
G H, Schenk, D J, Brown
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DETERMINATION OF FREE PHENOL IN PHENOL RESOLE RESIN BY GEL PERMEATION CHROMATOGRAPHY
Chemistry Letters, 1973Abstract The free phenol in phenol resole resin was determined by gel permeation chromatography with the high molecular polystyrene as the internal standard. The observed values were in close agreement with that obtained by gas chromatography. The reproducibility was about 4 per cent as the coefficient of variance.
Morio Tsuge +2 more
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Phenol biodegradation by free and immobilized Acinetobacter
Biotechnology Letters, 2002Acinetobacter sp. strain W-17, immobilized on porous sintered glass completely degraded 500 mg phenol l−1 in 40 h, but free cells required 120 h for this to be achieved. Immobilized cells can be used 7 times without losing their activity.
Usama Beshay +3 more
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Low-level Free Phenols in Sicilian Olive Oils
2010Publisher Summary The phenolic fraction of olive oils can be analyzed in different manners: the simple total quantitative determination is carried out by a colorimetric method, and the single phenols qualitative and quantitative analysis by using chromatographic or electrophoretic methods.
SAITTA, Marcello +4 more
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Free phenolic compounds in waters of the Ross Sea
Science of The Total Environment, 2019The presence of free phenolic compounds (PC) in Antarctic sea water has been investigated to explain their source and particle size distribution in the atmospheric aerosols, as determined in our previous research. The sea water samples were filtered to distinguish the PC concentrations in the particulate and dissolved fractions.
R Zangrando +7 more
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Free phenols in chronic renal failure.
Clinical nephrology, 1976Serum total free phenols are elevated in chronic renal failure, acute renal failure and hepatic coma. Being partly protein-bound, phenols behave during dialysis in a similar manner to considerably larger molecules which are not protein-bound. In view of their potential toxicity they should be considered as an alternative to 'middle molecules'. Patients
E N, Wardle, K, Wilkinson
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