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 chlo·ride

ZnCl₂; formerly used as a caustic for the removal of cutaneous cancers, nevi, etc., and in weak solution in the treatment of gonorrhea and conjunctivitis.

Synonym(s): butter of zinc

Farlex Partner Medical Dictionary © Farlex 2012

Mentioned in

References in periodicals archive

In the (HFO Blend)/POE system, there were four chemicals (polyoxyethylene nonyl-phenyl ether, potassium fluoride, potassium hydrogen fluoride, and sodium carbonate) along with the control that showed TOA [less than or equal to] 1000 ppm after aging at both low and high initial concentrations and eight chemicals (propylene glycol, potassium hydroxide, sodium molybdate, sodium paratoluene sulfonate, zinc chloride, neutral calcium alkylaryl sulfonate, sodium nitrite, and hydroxyethyl cellulose) that showed TOA > 1000 ppm at both concentrations.

Effects of System Materials toward the Breakdown of Lubricants and Low-GWP Refrigerants

Zinc chloride did not significantly affect the isotherm profile.

Determination of Moisture Sorption Isotherm of Crosslinked Millet Flour and Oxirane Using GAB and BET

The experimental data obtained from elemental analysis show a significant decrease in the carbon percentage of this complex than expected without the extra zinc ion, prompting us to include an associated zinc chloride molecule in 1.

Synthesis, Characterization, and BSA-Binding Studies of Novel Sulfonated Zinc-Triazine Complexes

Schenker and colleagues described an incident of zinc chloride smoke exposure because of detonation of a smoke bomb in an airport disaster drill.

Zinc Chloride Smoke Inhalation Induced Severe Acute Respiratory Distress Syndrome: First Survival in the United States with Extended Duration (Five Weeks) Therapy with High Dose Corticosteroids in Combination with Lung Protective Ventilation

To conduct the research of optimization of initial concentration of thiourea, the working solutions were prepared with 0,04 M zinc chloride, 0,04 M trisodium citrate.

Synthesis of ZnS thin films from aqueous caustic of trisodium citrate and their properties

venusta were detected only in the reaction with zinc chloride iodine.

Distribution and structural aspects of extrafloral nectaries in leaves of Pyrostegia venusta (Bignoniaceae)/Distribuicao e aspectos estruturais de nectarios extraflorais em folhas de Pyrostegia venusta (Bignoniaceae)

Cords that contained zinc chloride at 8% and 40% concentrations caused severe tissue destruction, while the other materials caused only reversible injury.

GINGIVAL RETRACTION - TECHNIQUES AND MATERIALS: A REVIEW

And, for all the talk of high-performance batteries, the inexpensive heavy-duty batteries, based on an old zinc chloride chemistry that alkalines succeeded, remain a presence for many retailers, particularly dollar stores and retailers appealing to a lower-income clientele.

Alkaline Still in Charge

The researchers produced a hydrogel by carrying out chemical reactions and modifying the structure of Chitosan, dried it in an oven, and ground it into powder.In order to produce zinc oxide nanoparticles, they poured some hydrogel in a solution of zinc chloride, and stirred it for a determined period of time.

Iranian Scientists Use Crab Shell to Synthesize Zinc Oxide Nanoparticles

The Agricultural Research Service (A.R.S.) has patented a key step in the process; it is using zinc chloride to catalyze the conversion of milkweed oil's triglycerides into the UV-absorbing cinnamic acid derivatives.

Milkweed: from floss to fun in the sun

Way back in 1920's, Gabriel and Colman3 as well as Ross4 has reported that methyl groups at 2,4- and 6- position in the pyrimidine ring undergo easy condensation with benzaldehyde in presence of anhydrous zinc chloride. 2- hydroxy4,6-dimethyl pyrimidine (I) and 2-mercapto-4,6-dimethyl pyrimidine (VI) attracted our attention because one or two nitrogen mustard can be introduced in them.

Synthesis of nitrogen mustards of pyrimdine derivatives

Unfortunately in the case of epichlorohydrin elastomers, zinc-containing materials can readily be converted to zinc chloride during extended aging at or near 125[degrees]C.

Activation systems for improved aging in epichlorohydrin terpolymer compounds