hydrogen sulfide

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Related to hydrogen sulfide: hydrogen sulfide poisoning


 (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 ?
Hydrogen sulfide restores a normal morphological phenotype in werner syndrome fibroblasts, attenuates oxidative damage and modulates mTOR pathway.
Operator exposure to hydrogen sulfide from dairy manure storages containing gypsum bedding.
Liu, "Hydrogen sulfide inhibits development of atherosclerosis through upregulating protein S-nitrosylation," Biomedicine and Pharmacotherapy, vol.
Our objectives were to determine 1) vulnerability to geothermal gas exposure among Lake County residents; 2) perceptions of and experiences with geothermal venting among Lake County residents; and 3) outdoor air levels of hydrogen sulfide and methane concentrations in residential areas to identify potential areas of Lake County geothermal venting.
Since the production of sulfuric acid from hydrogen sulfide is an aerobic-biological process, it can only occur on surfaces exposed to atmospheric oxygen.
The sensor can detect hydrogen sulfide at concentration about 5ppm.
"These results demonstrate hydrogen sulfide regulates bone marrow mesenchymal stem cells, and restoring hydrogen sulfide levels via non-toxic donors may provide treatments for diseases such as osteoporosis, which can arise from hydrogen sulfide deficiencies," Shi said.
Chamberlin and Clarke [7] were early investigators of the laminar flame speed of hydrogen sulfide. Their setup was typical of the period and consisted of a tube that was 1m long and 2.5 cm in internal diameter.
"We are now performing studies with orally active drugs that release hydrogen sulfide," said David Lefer, PhD, professor of surgery at Emory University School of Medicine and director of the Cardiothoracic Surgery Research Laboratory at Emory University Hospital, Midtown.
Hart, "Hydrogen sulfide as a vasculoprotective factor," Medical Gas Research, vol.
None of the concentrations of hydrogen sulfide donors used were seen to cause cell death.
Hydrogen sulfide rates were totally safe, the company reassured.