Sentence examples for arsenate from inspiring English sources

"Toxic risk," the research group said, means the potential exposure to wood treated with chromated copper arsenate, a form of arsenic used as a wood preservative.

ON March 17, the United States Environmental Protection Agency reached a final agreement with producers of treated wood to discontinue consumer sales of lumber impregnated with chromated copper arsenate, a preservative that contains arsenic, by the end of this year.

EARLIER this year, the Environmental Protection Agency announced a voluntary decision by manufacturers of treated wood to discontinue consumer sales of lumber treated with chromated copper arsenate, a preservative that contains arsenic, by Dec. 31, 2003.

The arsenate minerals, which are salts of arsenic acid, contain arsenate groups (AsO4) in which four oxygen (O) atoms are arranged at the corners of a tetrahedron about a central arsenic (As) atom.

In July, this space reported that the United States Environmental Protection Agency had reached an agreement with producers to discontinue sales of lumber treated with chromated copper arsenate -- a preservative that contains arsenic -- for residential purposes by the end of 2003.

Arsenic compounds of particular importance in agriculture are arsenic acid (H3AsO4) and such salts as lead arsenate (PbHAsO4) and calcium arsenate [Ca3(AsO4)2], which are useful for sterilizing soils and controlling pests, respectively.

Where DNA of all known organisms is built on a backbone of phosphates, derived from phosphorus, GFAJ-1, as the microbe NASA's boffins found in Mono Lake, California, is known, instead sported arsenates, chemical compounds based on arsenic.

Outdoors, webworms may be killed by an arsenate-of-lead spray, indoors they may be stepped on Webworm date given by Dr. C. H. Curran of the Museum of Natural History.

Arsenates and vanadates are similar to phosphates.

Arsenates at other localities are often oxidation products of arsenide ores and are deposited at low temperatures in late-stage veins and open cavities.

Calcium from the resulting solution is precipitated as calcium oxalate, while phosphorus and arsenic may be removed by the addition of magnesium oxide, which forms insoluble phosphates and arsenates of ammonium and magnesium.