Dating sitte


30-Dec-2017 07:19

Soil contains zinc in 5–770 ppm with an average 64 ppm.Seawater has only 30 ppb and the atmosphere, 0.1–4 µg/m Zinc is a chalcophile, meaning the element has a low affinity for oxides and prefers to bond with sulfides.Some alchemists called this zinc oxide lana philosophica, Latin for "philosopher's wool", because it collected in wooly tufts, whereas others thought it looked like white snow and named it nix album.The name of the metal was probably first documented by Paracelsus, a Swiss-born German alchemist, who referred to the metal as "zincum" or "zinken" in his book Liber Mineralium II, in the 16th century.This may refer to small quantities of zinc that is a by-product of smelting sulfide ores.Alchemists burned zinc metal in air and collected the resulting zinc oxide on a condenser.Other applications are in electrical batteries, small non-structural castings, and alloys such as brass.A variety of zinc compounds are commonly used, such as zinc carbonate and zinc gluconate (as dietary supplements), zinc chloride (in deodorants), zinc pyrithione (anti-dandruff shampoos), zinc sulfide (in luminescent paints), and zinc methyl or zinc diethyl in the organic laboratory.

Zinc makes up about 75 ppm (0.0075%) of Earth's crust, making it the 24th most abundant element.

Judean brass from the 14th to 10th centuries BC contains 23% zinc.



He was a lifelong member of Congregation Adath Jeshurun, the Jefferson County Pharmacy Association, the Veteran Drug Club, and the University of Kentucky Alumni Association.… continue reading »


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