| sulfur | <chemical> The correct English Language spelling. In the USA it is spelt sulfur. (18 Nov 1997) |
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| sulfur acids | Inorganic or organic acids that contain sulfur as an integral part of the molecule. (12 Dec 1998) |
| sulfur compounds | Inorganic or organic compounds that contain sulfur as an integral part of the molecule. (12 Dec 1998) |
| sulfur dioxide | <chemical> A highly toxic, colourless, nonflammable gas. It is used as a pharmaceutical aid and antioxidant. It is also an environmental air pollutant. Pharmacological action: air pollutants, environmental, antioxidants, pharmaceutic aid. Chemical name: Sulfur dioxide (12 Dec 1998) |
| sulfur group | The elements sulfur, selenium, and tellurium; they form dibasic acids with hydrogen, and their oxyacids are also dibasic. (05 Mar 2000) |
| sulfur group transferases | <enzyme> Enzymes that catalyze the transfer of sulfur atoms (2.8.1), sulfur groups (2.8.2) or coenzyme a (2.8.3). Registry number: EC 2.8 (12 Dec 1998) |
| sulfur hexafluoride | <chemical> Sulfur hexafluoride. An inert gas used mainly as a test gas in respiratory physiology. Other uses include its injection in vitreoretinal surgery to restore the vitreous chamber and as a tracer in monitoring the dispersion and deposition of air pollutants. Chemical name: Sulfur fluoride (SF6), (OC-6-11)- (12 Dec 1998) |
| sulfur iodide | Has been used in the treatment of certain skin diseases. (05 Mar 2000) |
| sulfur isotopes | Stable sulfur atoms that have the same atomic number as the element sulfur, but differ in atomic weight. S-33, 34, and 36 are stable sulfur isotopes. (12 Dec 1998) |
| sulfur mustard | <chemical> 1,1'-thiobis(2-chloroethane). Severe irritant and vesicant of skin, eyes, and lungs. It may cause blindness and lethal lung oedema and was formerly used as a war gas. The substance has been proposed as a cytostatic and for treatment of psoriasis. It has been listed as a known carcinogen in the fourth annual report on carcinogens (ntp-85-002, 1985) (merck, 11th ed). Pharmacological action: carcinogens, chemical warfare agents, dermatologic agents. Chemical name: Ethane, 1,1'-thiobis(2-chloro- (12 Dec 1998) |
| sulfur oxides | Inorganic oxides of sulfur. (12 Dec 1998) |
| sulfur oxygenase reductase | <enzyme> From desulfurolobus ambivalens; in the presence of oxygen but not under a hydrogen atmosphere simultaneously produces sulfite, thiosulfate, and hydrogen sulfide from sulfur; inhibited by sulfhydryl reagents, fad, ferrous and ferric ions Registry number: EC 1.8.- Synonym: sor gene product (sulfur oxygenase reductase) (26 Jun 1999) |
| sulfur radioisotopes | Unstable isotopes of sulfur that decay or disintegrate spontaneously emitting radiation. S 29-31, 35, 37, and 38 are radioactive sulfur isotopes. (12 Dec 1998) |
| sulfur trioxide | SO3;forms sulfuric acid, H2SO4, by its reaction with water. Synonym: sulfuric oxide. (05 Mar 2000) |
| sulfur water | A water containing hydrogen sulfide or the metallic sulfides. (05 Mar 2000) |
| carbon-sulfur ligases | <enzyme> Enzymes that catalyze the joining of two molecules by the formation of a carbon-sulfur bond. Registry number: EC 6.2 (12 Dec 1998) |
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| carbon-sulfur lyases | <enzyme> Enzymes that catalyze the cleavage of a carbon-sulfur bond by means other than hydrolysis or oxidation. Registry number: EC 4.4 (12 Dec 1998) |
| vegetable sulfur | <botany> A genus of mosslike plants, the type of the order Lycopodiaceae; club moss. Lycopodium powder, a fine powder or dust composed of the spores of Lycopodium, and other plants of the order Lycopodiaceae. It is highly inflammable, and is sometimes used in the manufacture of fireworks, and the artificial representation of lightning. Origin: NL, from Gr. Wolf +, a foot. Source: Websters Dictionary (01 Mar 1998) |
| green sulfur bacteria | A group of green or brown bacteria of the families chlorobiaceae and chloroflexaceae that occur in aquatic sediments, sulfur springs, and hot springs and that utilise reduced sulfur compounds instead of oxygen. (12 Dec 1998) |
| roll sulfur | Sublimed sulfur melted and cast in cylindrical molds; sometimes called brimstone. (05 Mar 2000) |
| milk of sulfur | Sublimed sulfur boiled with lime water, the lime being removed from the precipitate by washing with diluted hydrochloric acid; used in preparing sulfur ointment and in the treatment of various skin disorders. Synonym: lac sulfuris, milk of sulfur. (05 Mar 2000) |
| washed sulfur | Sublimed sulfur macerated in diluted ammonia water to remove the free acid; same therapeutic uses as sublimed sulfur. (05 Mar 2000) |
| wettable sulfur | Sulfur prepared from calcium polysulfide solution containing a protective colloid such as casein; it is easily dispersed and suspended in water. (05 Mar 2000) |
| precipitated sulfur | Sublimed sulfur boiled with lime water, the lime being removed from the precipitate by washing with diluted hydrochloric acid; used in preparing sulfur ointment and in the treatment of various skin disorders. Synonym: lac sulfuris, milk of sulfur. (05 Mar 2000) |
| soft sulfur | An allotropic form obtained by dropping very hot melted sulfur into water; it is then temporarily of a viscid or waxy consistency. (05 Mar 2000) |
| sublimed sulfur | Used in preparing sulfur ointment and in the treatment of various skin disorders. Synonym: flowers of sulfur. (05 Mar 2000) |
| iron-sulfur proteins | A group of proteins possessing only the iron-sulfur complex as the prosthetic group. These proteins participate in all major pathways of electron transport: photosynthesis, respiration, hydroxylation and bacterial hydrogen and nitrogen fixation. (12 Dec 1998) |
| technetium tc 99m sulfur colloid | <chemical> A gamma-emitting radionuclide imaging agent used for the diagnosis of diseases in many tissues, particularly in the gastrointestinal system, liver, and spleen. Pharmacological action: radiopharmaceuticals. (12 Dec 1998) |
| flowers of sulfur | Used in preparing sulfur ointment and in the treatment of various skin disorders. Synonym: flowers of sulfur. (05 Mar 2000) |
| liver of sulfur | A mixture composed chiefly of potassium polysulfides and potassium thiosulfate; used externally in scabies, acne, and psoriasis; used in the manufacture of "white lotion". Synonym: liver of sulfur. (05 Mar 2000) |