Results 221 to 230 of about 181,740 (264)
Some of the next articles are maybe not open access.
Variation in oral volatile sulphur compound formation
Acta Odontologica Scandinavica, 2002It has been suggested that the level of orally produced volatile sulphur compounds (VSCs) can be of use when monitoring oral malodour or in determining patients at risk of periodontal disease in longitudinal studies. It is not known, however, to what extent the level of VSC in mouth air is a stable, individual characteristic over time.The hypothesis to
Alix, Young +2 more
openaire +2 more sources
The Volatile Sulphur Compounds of Oysters
Journal of the Fisheries Research Board of Canada, 1964The compound responsible for the characteristic odour of fresh Pacific oysters, Crassostrea gigas (Thunberg), has been identified as dimethyl sulphide [(CH3)2S], by the formation of mercury salts, and by infrared analysis and gas chromatography. The effect of bacterial action on the oysters has been observed and a number of the volatile organo-sulphur
A. P. Ronald, W. A. B. Thomson
openaire +1 more source
Methionine catabolism and production of volatile sulphur compounds by OEnococcus oeni
Journal of Applied Microbiology, 2004During malolactic fermentation (MLF), the secondary metabolisms of lactic acid bacteria (LAB) contribute to the organoleptic modification of wine. To understand the contribution of MLF, we evaluated the capacity of various wine LAB to metabolize methionine.Using gas chromatography (GC) coupled either with mass spectrometry (MS) or a flame photometry ...
Pripis-Nicolau, L. +3 more
openaire +3 more sources
Preconcentration of Volatile Sulphur Compounds on Solid Sorbents
International Journal of Environmental Analytical Chemistry, 1983Abstract The development of industry and urbanisation is at the origin of ever-increasing levels of anthropogenic pollution. Emissions of sulphur-containing compounds are partly composed of volatile organic compounds which add to those generated through natural processes.
L. Torres +4 more
openaire +1 more source
Quantitation of volatile sulphur compounds in polluted waters
Journal of Chromatography A, 1997Abstract A study on the linear dynamic range of a combined cryogenic trap-gas chromatographic method with flame photometric detection (FPD) has shown that quantitation of volatile sulphur compounds (VSCs) in heavily polluted waters, in the order of hundreds of nanograms, is possible.
Ines Sola +4 more
openaire +1 more source
ESTIMATION OF VOLATILE SULPHUR COMPOUNDS IN BEER
Journal of the Institute of Brewing, 1992A method has been developed for the quantitative estimation of volatile sulphur compounds in beer at levels below 0.1 μg litre−1. The method relies on the concentration of beer headspace volatiles onto a porous polymer followed by injection into a capillary gas chromatographic column using a thermal desorption cold trap injector.
openaire +1 more source
ARTIFACTS IN GLC DETERMINATION OF VOLATILE SULPHUR COMPOUNDS IN BEER
Journal of the Institute of Brewing, 1973The chromatographic response of volatile sulphur components in the headspace of a typical Canadian ale investigated by a GLC technique using the FPD detector was found to vary according to the analytical procedure selected. Time and temperature of sample conditioning as well as mode of column preparation are stressed as the most important variables in ...
P. J. Richardson, M. Mocek
openaire +1 more source
P44 Management of volatile sulphur compounds with ozone
Oral Diseases, 2005Volatile sulphur compounds (VSCs) are responsible for oral malodour (bad breath). There are many otc products for people for use, based on an oxidative reaction system. This paper examines the effect of ozone on VSCs.Objective To test the efficacy of Ozone (O3) dissolved in water on VSCs and the management of bad breath in a small pilot study in a ...
openaire +1 more source