zinc oxide (ZnO)The semi-conducting material zinc is one of the essential trace elements for humans, is a co-factor of more than 300 enzymes, and plays an important role in maintaining vital cellular functions. Deficiency of zinc may lead to cancer initiation; however, a high concentration ...
Zinc-isotopes in a variety of rocks from Isua reveal a pronounced depletion in isotopically heavy Zn with respect to the igneous average pointing to a scenario whereby Isua rocks were permeated by carbonate-rich, high-pH reducing hydrothermal solutions at temperatures between 100–300 °C29. ...
in Oil Under Ambient Air with EDXRF Determination of Sulfur in Petroleum and Petroleum Products According ASTM D4294 WDXRF application notes Analysis of Zinc Coating on Steel Plate with WDXRF Analysis of Oils with ARL OPTIM’X WDXRF ...
Besides maintaining homeostasis with respect to metals including iron, copper, manganese, and zinc (which play a fundamental role in numerous intracellular processes such as enzyme catalysis, protein folding, and signaling), microorganisms in deep-sea sediments of the polymetallic nodule province have to...
The aquatic macrophyteEichhornia crassipeshas great potential for the control of Hg pollution in the environment. The aim of this study was to investigate the capability ofE. crassipesto accumulate elemental mercury (Hg0). The plants were exposed for 30 days to 5, 10, 20, 40, and 80 mg of...
EFFECTS OF THREE ZINC-CONTAINING SUNSCREENS ON DEVELOPMENT OFPURPLESEA URCHIN (STRONGYLOCENTROTUS PURPURATUS)EMBRYOS The growing popularity of physical sunscreens will lead to an increased release of ingredients from zinc oxide (ZnO) sunscreens into marine environments. T... B Cunningham,C Torres-Duarte...
and will react with dilute acids to Zinc is a moderately reactive metal that will combine with oxygen and other non- metals, and will react with dilute acids to release hydrogen. Alchemists prepared philosopher’s wool by burning the metal zinc in air. Philosopher’s wool was zinc oxide, whi...
Crystal structures can be modified by the substitution of either divalent or trivalent metal ions for Zn or In ions, respectively: Substitution of those smaller than Zn or larger than In in ionic size gave rise to the shrinkage of c-axis and the elongation of a-axis of a hexagonal unit ...
Elemental sulfur recovery from desulfurization sorbents in advanced power systems Regenerable metal oxide sorbents, such as zinc titanate, are being developed to efficiently remove hydrogen sulfide (H{sub 2}S) from coal gas in advanced p... TP Dorchak,SK Gangwal,BS Turk - 《Office of Scientific...
After addition of 10 mL of a 6 N HCl solution sparged with N2, AVS was liberated as H2S, which was then stripped from solution during 40 min using N2 as a carrier gas, and collected in a trap containing 10 mL 5% zinc acetate (ZnAc), with a drop of antifoam. We expect that H2S ...