Arsenic biochemistry: Arsenic biochemistry refers to biochemical processes that can use arsenic or its compounds, such as arsenate. Arsenic is a moderately abundant element in Earth's crust, and although many arsenic compounds are often considered highly toxic, a wide variety of organoarsenic compounds are produced biologically and various organic and inorganic arsenic compounds are metabolized by numerous organisms.Arsenic trioxide: As3+ O2−Trioxide: A trioxide is a compound with three oxygen atoms. For metals with the M2O3 formula there are several common structures.Cacodyl oxideArsenite: In chemistry, an arsenite is a chemical compound containing an arsenic oxoanion where arsenic has oxidation state +3. Note that in fields that commonly deal with groundwater chemistry, arsenite is used generically to identify soluble AsIII anions.Lead hydrogen arsenate: Lead hydrogen arsenate, also called lead arsenate, acid lead arsenate or LA, chemical formula PbHAsO4, is an inorganic insecticide used primarily against the potato beetle.Public water systemEconomy of ChittagongStaining of the nail plate: Staining of the nail plate may occur due to nicotine, dyes (including hair dyes and nail polish), potassium permanganate, mercury compounds, hydroquinone, elemental iron, mepacrine, photographic developer, anthralin, chrysarobin, glutaraldehyde, or resorcin.James, William; Berger, Timothy; Elston, Dirk (2005).Casing hanger: In petroleum production, the casing hanger is that portion of a wellhead assembly which provides support for the casing string when it is lowered into the wellbore. It serves to ensure that the casing is properly located.PyromorphiteNew Hampshire Route 102: in HudsonGroundwater model: Groundwater models are computer models of groundwater flow systems, and are used by hydrogeologists. Groundwater models are used to simulate and predict aquifer conditions.Phenylarsonic acidAtomic absorption spectroscopy: Atomic absorption spectroscopy (AAS) is a spectroanalytical procedure for the quantitative determination of chemical elements using the absorption of optical radiation (light) by free atoms in the gaseous state.Pteris ensiformisArsenate reductase (cytochrome c): Arsenate reductase (cytochrome c) (, arsenite oxidase) is an enzyme with system name arsenite:cytochrome c oxidoreductase. This enzyme catalyses the following chemical reactionSAFE FOODSAntimony trioxideIon pump (physics): An ion pump (also referred to as a sputter ion pump) is a type of vacuum pump capable of reaching pressures as low as 10−11 mbar under ideal conditions. An ion pump ionizes gas within the vessel it is attached to and employs a strong electrical potential, typically 3–7 kV, which allows the ions to accelerate into and be captured by a solid electrode and its residue.Metallurgy: Metallurgy is a domain of materials science and engineering that studies the physical and chemical behavior of metallic elements, their intermetallic compounds, and their mixtures, which are called alloys. Metallurgy is also the technology of metals: the way in which science is applied to the production of metals, and the engineering of metal components for usage in products for consumers and manufacturers.Stillwater Mining Company: Stillwater Mining Company () is a palladium and platinum mining company with headquarters located at Billings, Montana, United States. It is the only palladium and platinum producer in the USA.Phytoextraction process: Phytoextraction is a subprocess of phytoremediation in which plants remove dangerous elements or compounds from soil or water, most usually heavy metals, metals that have a high density and may be toxic to organisms even at relatively low concentrations.http://www.List of tallest buildings in Chile: This is a list of the 10 tallest buildings in Chile including buildings that are under construction.Hair analysis