| 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) |
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| 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) |
| sulfur | <chemical> The correct English Language spelling. In the USA it is spelt sulfur. (18 Nov 1997) |
| sulfur-35 | A radioactive sulfur isotope; a beta emitter with a half-life of 87.2 days; used as a tracer in the study of metabolism of cysteine, cystine, methionine, etc.; also used to estimate, with labelled sulfate, extracellular fluid volumes. (05 Mar 2000) |
| 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-ferric ion oxidoreductase | <enzyme> From thiobacillus ferrooxidans; catalyses the production of sulfite and fe(2+) from elemental sulfur and fe(3+) Registry number: EC 1.8.99.- Synonym: sf oxidoreductase, sulfite-ferric ion oxidoreductase (26 Jun 1999) |
| sulfur group | The elements sulfur, selenium, and tellurium; they form dibasic acids with hydrogen, and their oxyacids are also dibasic. (05 Mar 2000) |