aliphatic hydrocarbon
81Organic chemistry — Structure of the methane molecule: the simplest hydrocarbon compound. Organic chemistry is a subdiscipline within chemistry involving the scientific study of the structure, properties, composition, reactions, and preparation (by synthesis or by… …
82occupational disease — 1. Also called industrial disease. a disease caused by the conditions or hazards of a particular occupation. 2. a trait or tendency that develops among members of a particular profession: Cynicism was thought to be an occupational disease of… …
83Abiogenic petroleum origin — is a largely abandoned hypothesis that was proposed as an alternative to theory of biological petroleum origin. It was relatively popular in the past, but it went largely forgotten at the end of the 20th century after it failed to predict the… …
84bacteria — bacterial, adj. bacterially, adv. /bak tear ee euh/, n.pl., sing. bacterium / tear ee euhm/. ubiquitous one celled organisms, spherical, spiral, or rod shaped and appearing singly or in chains, comprising the Schizomycota, a phylum of the kingdom …
85Polystyrene — For other uses, see Polystyrene (disambiguation). Expanded polystyrene packaging …
86Alcohol — This article is about the generic chemistry term. For the kind of alcohol found in alcoholic beverages, see Ethanol. For beverages containing alcohol, see Alcoholic beverage. For other uses, see Alcohol (disambiguation) …
87Chemical reaction — Chemical reactions redirects here. For the 2007 television episode, see Chemical Reactions (Men in Trees). A thermite reaction using iron(III) oxide. The sparks …
88Extraterrestrial life — For fiction, see Extraterrestrials in fiction. For other uses, see Alien (disambiguation). A 1967 Soviet Union 16 kopeks postage stamp, depicting a satellite from an imagined extraterrestrial civilization …
89White spirit — This article is about the solvent. For the band, see White Spirit (band). White spirit [CAS 64475 85 0][1][2][3], also known as Stoddard solvent [CAS 8052 41 3][4][5] or mineral spirits, is a paraffin derived clear, transparent liquid which is a… …
90Solid phase extraction — (SPE) is a separation process that is used to remove solid or semi solid compounds from a mixture of impurities based on their physical and chemical properties. Analytical laboratories use solid phase extraction to concentrate and purify samples… …
