hydrogen sulfide

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Related to Sulfane: Persulfide


 (H) [hi´dro-jen]
a chemical element, atomic number 1, atomic weight 1.00797. (See Appendix 6.) It exists as the mass 1 isotope (protium, or light or ordinary hydrogen), mass 2 isotope (deuterium, heavy hydrogen), and mass 3 isotope (tritium).
hydrogen cyanide an extremely poisonous colorless liquid or gas, HCN, a decomposition product of various naturally occurring glycosides and a common cause of cyanide poisoning. Inhalation of the gas can cause death within a minute. Called also hydrocyanic acid.
heavy hydrogen deuterium.
hydrogen ion concentration the degree of concentration of hydrogen ions (the acid element) in a solution. Its symbol is pH, and it expresses the degree to which a solution is acidic or alkaline. The pH range extends from 0 to 14, pH 7 being neutral, a pH of less than 7 indicating acidity, and one above 7 indicating alkalinity. See also acid-base balance.
hydrogen peroxide H2O2, an antiseptic with a mildly antibacterial action. A 3 per cent solution foams on touching skin or mucous membrane and appears to have a mechanical cleansing action.
hydrogen sulfide H2S, a poisonous gas with an offensive smell, released from decaying organic material, natural gas, petroleum, and sulfur deposits, and sometimes used as a chemical reagent.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

hy·dro·gen sul·fide

H2S; a colorless, flammable, toxic gas with a familiar "rotten egg" odor, formed in the decomposition of organic matter containing sulfur; used as a reagent, and in the manufacture of chemicals.
Synonym(s): sulfureted hydrogen
Farlex Partner Medical Dictionary © Farlex 2012

hy·dro·gen sul·fide

(hīdrō-jen sŭlfīd)
A fetid poisonous gas that smells like rotten eggs.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012

hy·dro·gen sul·fide

(hīdrō-jen sŭlfīd)
Colorless, flammable, toxic gas with familiar "rotten egg" odor.
Medical Dictionary for the Dental Professions © Farlex 2012
References in periodicals archive ?
(78) Compared with L-cysteine administration, the oral administration of D-cysteine to mice increases the levels of bound sulfane sulfur, a potential intracellular store of [H.sub.2]S, and protects the kidneys from ischemia-reperfusion injury much more efficiently.
(129)-(131) We found that [H.sub.2]S is absorbed and stored in cells as bound sulfane sulfur, which releases [H.sub.2]S in response to reducing agents such as DTT.
(143) demonstrated that GSSH can be formed via the enzymatic activity of SQR rather than nonenzymatic sulfane sulfur exchange between cysteine persulfide and oxidized gluthathione reported by Ida et al.
Wlodek, "Biosynthesis and biological properties of compounds containing highly reactive, reduced sulfane sulfur," Polish Journal of Pharmacology, vol.
Enzymatically produced [H.sub.2]S can be intracellularly stored as bound sulfane sulfur [18].
Its enzymatic production is antagonized by storage as bound sulfane sulfur and oxidative metabolism, thereby limiting the concentration of free [H.sub.2]S to the submicromolar range [36, 37].