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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 un·dec·y·len·ate, zinc undecenoate
the zinc salt of undecylenic acid; used in the treatment of fungal and other affections of the skin, including psoriasis.
C22H38O4Zn, a fine white powder used as a topical antifungal.
See also: zinc
a chemical element, atomic number 30, atomic weight 65.37, symbol Zn. See Table 6.
Zinc is a trace element that is a component of several enzymes, including DNA and RNA polymerases, and carbonic anhydrase. Zinc salts are used in skin lotions, eye washes, the treatment and prevention of footrot of sheep and facial eczema of sheep and cattle.
a salt used as an astringent and styptic.
zinc cadmium sulfide
used in the preparation of fluoroscopic screens; is fluorescent and emits yellow-green light when excited by x-rays.
a mild astringent; used mainly as calamine.
an industrial compound used in cold galvanizing of metal. Accidental access causes diarrhea and fatal enteritis.
zinc finger motif
sequence of approximately 30 amino acids, forming a helix-turn-helix, believed to form a structure that includes tetrahedrally coordinated zinc (II) ions. Found in many eukaryotic, prokaryotic and viral DNA-binding proteins.
zinc finger protein
DNA-binding proteins that contain zinc-finger motifs.
a mixture of zinc oxide, gelatin, glycerin and purified water; used topically as a protectant.
a source of supplementary zinc.
hereditary zinc deficiency
lethal trait A46; see inherited parakeratosis.
zinc nutritional deficiency
causes parakeratosis in pigs, a chronic, afebrile, noninflammatory disease of the epidermis characterized by crusty proliferation and cracking of the skin. Dogs fed diets with high levels of calcium or cereals may have poor absorption of zinc and develop signs of deficiency, primarily in the skin. See also zinc-responsive dermatosis.
a preparation of zinc oxide and mineral oil in white ointment; used topically as an astringent and protectant.
causes hemolytic anemia, anorexia and vomiting.
a compound used as a topical astringent and protectant. Inhalation of fumes causes interstitial emphysema and atelectasis.
used as a phosphate-bonded cement in restorative dentistry.
used at one time as a rodenticide. When ingested the poisonous gas phosphine is liberated and kills the animal without diagnostic signs or lesions.
is usually chronic and causes stiffness and lameness with particular involvement of the shoulder joint in which there is a degenerative arthritis. In acute poisoning there is gastroenteritis with vomiting.
a compound of zinc with stearic and palmitic acids; used as a water-repellent protective powder in dermatoses.
a compound used as an ophthalmic astringent, in skin lotions (see white lotion), for sheep footrot, and the treatment of facial eczema. It is the common form of zinc for oral supplementation and treatment of zinc-responsive diseases.
zinc sulfate flotation test
used to demonstrate nematode eggs, protozoan cysts, and larvae in feces and bronchial secretions.
zinc sulfate turbidity test
1. serum globulins are precipitated by zinc sulfate. The test is used for the semiquantitative assessment of the immunological status of foals and calves when there is a question of whether they have suckled to receive immunoglubulins.
2. an outdated liver function test.
a compound used topically in 20% ointment as an antifungal agent. See also undecylenic acid.