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The evolution of different volatile sulfur compounds (VSCs) during bottle maturation of two Shiraz wines submitted to controlled oxygen exposure prior to bottling (through micro-oxygenation, MOX) and postbottling (through the closure) was investigated. H(2)S, methyl mercaptan (MeSH), and dimethyl sulfide (DMS) were found to increase during aging. Lower postbottling oxygen exposure, as obtained by different degrees of oxygen ingress through the closure, resulted in increased H(2)S and methyl mercaptan. In one wine MOX increased the concentration of H(2)S and methyl mercaptan during maturation. Dimethyl disulfide and DMS were not affected by any form of oxygen exposure. Overall, postbottling oxygen had a stronger influence than MOX on the evolution of VSCs. Data suggest that dimethyl disulfide was not a precursor to methyl mercaptan during bottle maturation. For the two wines studied, a consumption of oxygen of 5 mg/L over 12 months was the most effective oxygen exposure regimen to decrease accumulation of MeSH and H(2)S during bottle aging.
Nomacorc SA , Chemin de Xhenorie, Thimister-Clermont, Belgium.
This article was published in the following journal.
Name: Journal of agricultural and food chemistry
Recently, microbreweries have shown a significant increase. Usually, craft beers are bottle conditioned, however few studies have investigated beer refermentation. One of the objectives of this study ...
A chemolithoautotrophic strain of the family Beggiatoaceae, Beggiatoa sp. 35Flor, was found to oxidize molecular hydrogen when grown in a medium with diffusional gradients of oxygen, sulfide, and hydr...
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Geochemical cycling and biological toxicity of sulfur in marine sediments is closely related to the activity of organisms. This study investigated the distribution and potential impact on benthic envi...
The purpose of the study is to evaluate the effect of various oral hygiene regimes on three volatile sulfur compounds.
to assess the effectiveness of helium:oxygen mixture adjunct with non-invasive ventilation in sulfur mustard exposed patients with acute decompensation
to assess the effect of Heliox with Noninvasive positive pressure ventilation to decrease dyspnea and improve physiologic and respiratory measures in patients with a previous exposure to S...
The investigators will examine the relationship between post-operative oxygen consumption (using non-invasive measurement technology ) and complications in patients having contemporary maj...
The Lung Cancer Indicator Detection (LuCID) study investigates the the diagnostic accuracy of FAIMS for diagnosis of lung cancer by analysis of exhaled Volatile Organic Compounds.
The rate at which oxygen is used by a tissue; microliters of oxygen STPD used per milligram of tissue per hour; the rate at which oxygen enters the blood from alveolar gas, equal in the steady state to the consumption of oxygen by tissue metabolism throughout the body. (Stedman, 25th ed, p346)
A measurement of OXYGEN uptake in a sitting, resting person (resting oxygen consumption), varying with age, sex, race, and other factors. In normal adult men, one MET is approximately 3.5 ml O2/kg/min of body weight. Oxygen uptake during activities or work can be measured in METs which can be use to determine health status and exercise prescription.
The species Tursiops truncatus, in the family Delphinidae, characterized by a bottle-shaped beak and slightly hooked broad dorsal fin.
Inorganic or organic compounds that contain sulfur as an integral part of the molecule.
Oils which evaporate readily. The volatile oils occur in aromatic plants, to which they give odor and other characteristics. Most volatile oils consist of a mixture of two or more TERPENES or of a mixture of an eleoptene (the more volatile constituent of a volatile oil) with a stearopten (the more solid constituent). The synonym essential oils refers to the essence of a plant, as its perfume or scent, and not to its indispensability.