A form of SILICON DIOXIDE composed of skeletons of prehistoric aquatic plants which is used for its ABSORPTION quality, taking up 1.5-4 times its weight in water. The microscopic sharp edges are useful for insect control but can also be an inhalation hazard. It has been used in baked goods and animal feed. Kieselguhr is German for flint + earthy sediment.
A family of wingless, blood-sucking insects of the suborder HETEROPTERA, including the bedbugs and related forms. Cimex (BEDBUGS), Heamatosiphon, and Oeciacus are medically important genera. (From Dorland, 28th ed)
Quartz (SiO2). A glassy or crystalline form of silicon dioxide. Many colored varieties are semiprecious stones. (From Grant & Hackh's Chemical Dictionary, 5th ed)
Transparent, tasteless crystals found in nature as agate, amethyst, chalcedony, cristobalite, flint, sand, QUARTZ, and tridymite. The compound is insoluble in water or acids except hydrofluoric acid.
Earth or other matter in fine, dry particles. (Random House Unabridged Dictionary, 2d ed)
The exposure to potentially harmful chemical, physical, or biological agents that occurs as a result of one's occupation.
Inorganic and organic derivatives of boric acid either B(OH)3 or, preferably H3BO3.
Pesticides designed to control insects that are harmful to man. The insects may be directly harmful, as those acting as disease vectors, or indirectly harmful, as destroyers of crops, food products, or textile fabrics.
Insects of the suborder Heterocera of the order LEPIDOPTERA.
A plant genus of the family LAMIACEAE that contains cyasterone, ajugasterone, 20-hydroxyecdysone, 8-acetylharpagide (an iridoid glycoside).
The reduction or regulation of the population of noxious, destructive, or dangerous plants, insects, or other animals. This includes control of plants that serve as habitats or food sources for animal pests.
Common name for the species Gallus gallus, the domestic fowl, in the family Phasianidae, order GALLIFORMES. It is descended from the red jungle fowl of SOUTHEAST ASIA.
The process of laying or shedding fully developed eggs (OVA) from the female body. The term is usually used for certain INSECTS or FISHES with an organ called ovipositor where eggs are stored or deposited before expulsion from the body.
A plant genus of the family VERBENACEAE. Members contain verbenachalcone (dimeric dihydrochalcone), iridoids, and phenylethanoids.
Infections or infestations with parasitic organisms. The infestation may be experimental or veterinary.
Cyclic N-oxide radical functioning as a spin label and radiation-sensitizing agent.
Cultivation of PLANTS; (FRUIT; VEGETABLES; MEDICINAL HERBS) on small plots of ground or in containers.
Characteristics or attributes of persons or things which elicit pleasurable feelings.