Results 241 to 250 of about 20,312 (280)

Volatile Phenols in Serum of Uraemic Patients

Clinical Science, 1972
1. The volatile phenols in sera of uraemic patients were analysed by gas-liquid chromatography. The concentrations of p-cresol, 1·17 ± 0·58 (mean ± SD), and phenol, 0·44 ± 0·39 mg/100 ml, were higher than the corresponding values (0·23 ± 0·17 and 0·02 ± 0·03 mg/100ml, respectively) in control subjects.
B, Wengle, K, Hellström
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Urinary Volatile Phenols in Patients with Intestinal Obstruction

Scandinavian Journal of Gastroenterology, 1971
To elucidate the origin of urinary volatile phenols in the gastrointestinal tract, their excretion was determined in 16 patients with intestinal obstruction. The normal level of excretion for these compounds (19–88 mg) was established by their determination in 23 control persons.
A, Tamm, K, Villako
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HPLC determination of volatile phenols in wines

Chromatographia, 1993
An alternative to the traditional solvent extraction method used to extract and rapidly quantify ethyl-and vinylphenol and ethyl-and vinylgaiacol from wine is presented. The method is based on retention of volatile phenols on adsorbants. Among the tested resins, the most efficient, AG 2-X8 (anion exchange resin), worked as well with a synthetic ...
Siegrist, J., Salles, Christian, Etiévant, P.X.   +2 more
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Volatile phenol determination in wine

Journal of Agricultural and Food Chemistry, 1981
International ...
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A Gas Chromatographic Technique for the Analysis of Volatile Phenols in Serum

Scandinavian Journal of Clinical and Laboratory Investigation, 1971
AbstractThe method used for the determination of phenol, o-, m- and p-cresol is based upon purification by means of distillation, chloroform extraction of distillates, and gas chromatographic analysis of the trimethylsilyl ethers prepared. Serum samples from 15 normal subjects contained p-cresol (most probably sulphate-conjugated) at a mean ...
B, Wengle, K, Hellström
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Synthesis of volatile phenols by Saccharomyces cerevisiae in wines

Journal of the Science of Food and Agriculture, 1993
AbstractVinylphenols (4‐vinylphenol and 4‐vinylguaiacol) are natural constituents of wine and can play a role in wine aroma. However, only white wines contain important quantities of these volatile substances which, beyond a certain concentration (limit threshold = 725 μg litre−1 of 4‐vinylguaiacol+4‐vinylphenol (1:1)), can be responsible for a ...
Pascal Chatonnet, Denis Dubourdieu, Jean‐noël Boidron, ValéRie Lavigne   +3 more
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Sorption of wine volatile phenols by yeast lees

Food Chemistry, 2005
The capacity of Saccharomyces cerevisiae yeast lees to sorb 4-ethylguaiacol and 4-ethylphenol was investigated in a synthetic medium and in wine. Active dried yeast was more effective when volatile phenols were diluted in red wine. Partition coefficients between wine model solution and wine yeast lees were determined and compared with those measured ...
David Chassagne, Michèle Guilloux-Benatier, Hervé Alexandre, Andrée Voilley   +3 more
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Further volatile phenols of latakia tobacco leaf

Phytochemistry, 1969
Abstract The phenolic extract of Latakia tobacco was analysed by conversion of the phenols to their corresponding acetates and separation of the components by capillary gas chromatography. Thirty-eight phenols have been identified by comparison with authentic compounds on three stationary phases.
W.J. Irvine, M.J. Saxby
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[Volatile phenolic compounds in white wines].

Prikladnaia biokhimiia i mikrobiologiia, 1978
By gas-liquid chromatography the following volatile phenols were identified in extracts and distillates of white table wines prepared with the aid of husks and pulp used in fermentation: phenol, m-cresol, guaicol, ethyl-4-phenol, vinyl-4-phenol, eugenol, tyrosol; phenol, m-cresol, guaicol, ethyl-4-phenol, vinyl-4-phenol.
M Ia, Dzhakhua, E S, Drboglav, M A, Dzhaparidze   +2 more
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Adsorption of Volatile Phenol in Coking Wastewater by Diatomite

Advanced Materials Research, 2012
Coal process wastewater that discharged from coal conversion processes usually contains volatile phenol in high concentration. As a natural mineral, diatomite demonstrates its excellent adsorption performance especially in organic pollutants removal.
Qi Yuan Gu, Gen Wu, Xi Ning Lu
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