| 释义 |
zinc oxide
zinc oxiden. An amorphous white or yellowish powder, ZnO, used as a pigment, in compounding rubber, in the manufacture of plastics, and in pharmaceuticals and cosmetics.zinc oxide n (Elements & Compounds) a white insoluble powder used as a pigment in paints (zinc white or Chinese white), cosmetics, glass, and printing inks. It is an antiseptic and astringent and is used in making zinc ointment. Formula: ZnO. Also called: flowers of zinc or philosopher's wool zinc′ ox′ide
n. a white powder, ZnO, used as a pigment and in cosmetics, dental cement, matches, printing inks, and glass, and in medicine for treatment of skin conditions. [1840–50] zinc oxide A white or yellowish powdery compound, ZnO, used in paints and in various medicines and skin cosmetics.Thesaurus| Noun | 1. | zinc oxide - oxide of zinc; a white powder used as a pigment or in cosmetics or glass or inks and in zinc ointmentflowers of zinc, philosopher's wool, philosophers' wooloxide - any compound of oxygen with another element or a radicalChinese white, zinc white - a white pigment used in house paints; consists of zinc oxide |
Translationszinc oxide
zinc oxide, chemical compound, ZnO, that is nearly insoluble in water but soluble in acids or alkalies. It occurs as white hexagonal crystals or a white powder commonly known as zinc white. Zinc white is used as a pigment in paints; less opaque than lithopone, it remains white when exposed to hydrogen sulfide or ultraviolet light. It is also used as a filler for rubber goods and in coatings for paper. Chinese white is a special grade of zinc white used in artists' pigments. Because it absorbs ultraviolet light, zinc oxide can be used in ointments, creams, and lotions to protect against sunburn. Crystalline zinc oxide exhibits the piezoelectric effect, is luminescent, and is light sensitive. Zinc oxide occurs in nature as the mineral zincite. Zinc peroxide, ZnO2· 1-2H2O, is a white to yellow powder used in antiseptic ointments.Zinc Oxide ZnO, a colorless crystalline compound, with a density of 5.7 g/cm3. Zinc oxide yellows upon roasting and does not melt; it sublimes at temperatures above 1800°C. It is insoluble in water. It is an amphoteric compound, dissolving in acids with the formation of the corresponding salts, as well as in alkalies and aqueous solutions of ammonia. Zinc oxide is encountered in nature as the mineral zincite (see). It is produced commercially by burning zinc vapor in the presence of air; zinc oxide is collected from the resultant smoke by cloth filters or other types of filters. Zinc oxide is used in the rubber industry as an activator of vulcanization of many rubbers or as a vulcanizing agent of some rubbers, for example, chloroprene rubber. In the chemical industry, it is used as a catalyst for the synthesis of methanol and as a white paint pigment. It is also used in the production of perfumeries, cosmetics, and drugs (in the form of ointments, pastes, and powders for various skin conditions). Zinc oxide powder is slightly toxic; its maximum permissible concentration in the air at places of work is 6 mg/m3. REFERENCESSee references under .N. N. SEVRIUKOV zinc oxide[′ziŋk ′äk‚sīd] (inorganic chemistry) ZnO A bitter-tasting, white to gray powder that is insoluble in water, soluble in alkalies and acids; melts at 1978°C; used as a pigment, mold-growth inhibitor, and dietary supplement, and in cosmetics, electronics, and color photography. zinc oxide, zinc whiteA white water-insoluble pigment which has low hiding power; used in paints to provide durability, color retention, and hardness, and to increase sag resistance.zinc oxide a white insoluble powder used as a pigment in paints (zinc white or Chinese white), cosmetics, glass, and printing inks. It is an antiseptic and astringent and is used in making zinc ointment. Formula: ZnO zinc oxide
zinc [zingk] a chemical element, atomic number 30, atomic weight 65.37, symbol Zn. (See Appendix 6.) It is a trace element in the diet, a component of several enzymes, including DNA and RNA polymerases and carbonic anhydrase. It is abundant in red meat, shellfish, liver, peas, lentils, beans, and rice. A well-balanced diet assures adequate intake of zinc. Those who may suffer from zinc deficiency include persons on a strictly vegetarian diet and those who are on a high-fiber diet. In the latter case, the zinc is bound to the fiber and is eliminated in the feces without having been absorbed through the intestinal wall. Poor absorption of zinc also can occur in persons with chronic and severe bowel disease. The recommended daily intake is 12–15 mg for an adult. A severe deficiency of zinc can retard growth in children, cause a low sperm count in adult males, and retard wound healing. Signs of a deficiency include anorexia and a diminished sense of taste. An excessive intake of zinc (usually in those who work with the metal or breathe its fumes) can either cause pneumoconiosis or interfere with the body's use of copper and other trace elements, producing diarrhea, nausea, vomiting, and other signs of intestinal irritation.zinc acetate a salt used as an astringent and styptic.zinc chloride a salt used as a nutritional supplement in total parenteral nutrition and applied topically as an astringent and a desensitizer for dentin.zinc oxide a topical astringent and skin protectant; also a sunscreen.zinc stearate a powder of zinc in a compound with stearic and palmitic acids; used as a water-repellent skin protectant in dermatoses.zinc sulfate a topical astringent for mucous membranes, especially those of the eye.zinc undecylenate the zinc salt of undecylenic acid; it is a topical antifungal.zinc ox·ideZnO; used as a protective in ointment, as a dusting powder; also used in paint as a substitute for lead carbonate. Synonym(s): flowers of zinc, zinc whitezinc oxiden. An amorphous white or yellowish powder, ZnO, used as a pigment, in compounding rubber, in the manufacture of plastics, and in pharmaceuticals and cosmetics.zinc oxide Toxicology A compound used in welding which, in excess, may cause zinc intoxication Uses Topically, astringent, calamine lotion. See Zinc. zinc oxide A white powder with mild ASTRINGENT properties used as a dusting powder or incorporated into creams or ointments and used as a bland skin application. Mixed with oil of cloves, zinc oxide forms an effective and pain-relieving temporary dressing for a tooth cavity. Zinc oxide is an ingredient in numerous proprietary medical preparations.zinc ox·ide (zingk ok'sīd) Used as a protective in ointment and as a dusting powder; also used in paint as a substitute for lead carbonate. See ZO
See ZOzinc oxide
Synonyms for zinc oxidenoun oxide of zincSynonyms- flowers of zinc
- philosopher's wool
- philosophers' wool
Related Words- oxide
- Chinese white
- zinc white
|