A sulfuric acid dimer, formed by disulfide linkage. This compound has been used to prolong coagulation time and as an antidote in cyanide poisoning.

The reproductive organs of plants.

Four fused benzyl rings with three linear and one angular, that can be viewed as a benzyl-phenanthrenes. Compare with NAPHTHACENES which are four linear rings.

The element in plants that contains the female GAMETOPHYTES.

The encapsulated embryos of flowering plants. They are used as is or for animal feed because of the high content of concentrated nutrients like starches, proteins, and fats. Rapeseed, cottonseed, and sunflower seed are also produced for the oils (fats) they yield.

The fleshy or dry ripened ovary of a plant, enclosing the seed or seeds.

A plant genus of the family SOLANACEAE. Members contain steroidal glycosides.

The transfer of POLLEN grains (male gametes) to the plant ovule (female gamete).

Inorganic salts of thiosulfuric acid possessing the general formula R2S2O3.

An element that is a member of the chalcogen family. It has an atomic symbol S, atomic number 16, and atomic weight [32.059; 32.076]. It is found in the amino acids cysteine and methionine.

A genus of facultatively anaerobic coccoid ARCHAEA, in the family SULFOLOBACEAE. Cells are highly irregular in shape and thermoacidophilic. Lithotrophic growth occurs aerobically via sulfur oxidation in some species. Distribution includes solfataric springs and fields, mudholes, and geothermically heated acidic marine environments.

A family of gram-negative, aerobic, non-spore forming rods or cocci. Well known genera include ACHROMOBACTER; ALCALIGENES; and BORDETELLA.

Oxidoreductases with specificity for oxidation or reduction of SULFUR COMPOUNDS.

A chemical reaction in which an electron is transferred from one molecule to another. The electron-donating molecule is the reducing agent or reductant; the electron-accepting molecule is the oxidizing agent or oxidant. Reducing and oxidizing agents function as conjugate reductant-oxidant pairs or redox pairs (Lehninger, Principles of Biochemistry, 1982, p471).

The discarding or destroying of liquid waste products or their transformation into something useful or innocuous.

Contaminated water generated as a waste product of human activity.

Refuse liquid or waste matter carried off by sewers.

Any of several processes in which undesirable impurities in water are removed or neutralized; for example, chlorination, filtration, primary treatment, ion exchange, and distillation. It includes treatment of WASTE WATER to provide potable and hygienic water in a controlled or closed environment as well as provision of public drinking water supplies.

Exclusive legal rights or privileges applied to inventions, plants, etc.

Worthless, damaged, defective, superfluous or effluent material from industrial operations.

Disposal, processing, controlling, recycling, and reusing the solid, liquid, and gaseous wastes of plants, animals, humans, and other organisms. It includes control within a closed ecological system to maintain a habitable environment.