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hydrocarbon
polyaromatic hydrocarbon
polyaromatic hydrocarbon (PAH) One of a range of persistent, toxic compounds that are produced mainly by the incomplete combustion of hydrocarbon fuels. Many are carcinogens, mutagens, or both. Those of low molecular weight occur mainly as vapour in the air, those of higher molecular weight as particles in soil or water.
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Hydrocarbon dew point monitoring of natural gas using field-mounted, on-line gas chromatographs.
Magazine article from: Pipeline & Gas Journal; 7/1/2005; ; 700+ words
; ...2[degrees]C. Hydrocarbon Dew Point Determination...Analysis Calculations of hydrocarbon dew point from compositional...typically contain hydrocarbons at trace (ppm) levels...Communication). Hydrocarbon dew point is mainly...influenced by C7 and above hydrocarbons (J.R. Coulthurst...
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Light hydrocarbon: emerging fourth-generation fuel gas.(Energy)
Magazine article from: China Chemical Reporter; 4/16/2008; 700+ words
; ...for light hydrocarbon resources...of light hydrocarbons in China...Moreover, light hydrocarbon fuel gas...of light hydrocarbons was not adequate...of light hydrocarbon fuel gas...this: Light hydrocarbons such as C5...
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Enhanced biodegradation of petroleum hydrocarbons in contaminated soil
Magazine article from: Bioremediation Journal; 3/1/2003; ; 700+ words
; ...petroleum hydrocarbons, while bioaugmentation...efficiency of hydrocarbon removal from...transfer of hydrocarbons from soil...efficiency of hydrocarbon removal to...biodegradation of hydrocarbons. The extent of hydrocarbon mineralization...
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The Algerian Hydrocarbons Regulations.
News Wire article from: Mondaq Business Briefing; 10/5/2009; 700+ words
; The hydrocarbons sector is the backbone...oil reserves. The new hydrocarbon regime implemented in...simplifying considerably the hydrocarbons legal and tax regime...important amendments to the hydrocarbons legal regime are considered...
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Atmospheric Chemistry and Hydrocarbon Emissions from Plants(1).
Magazine article from: Ecological Applications; 11/1/1999; ; 700+ words
; ...anthropogenic hydrocarbons best controlled...anthropogenic hydrocarbon emissions have...when and where hydrocarbons will be emitted...atmosphere. Predicting hydrocarbon emissions also...controls of biogenic hydrocarbons, (2) micrometeorology of biogenic hydrocarbon emissions...
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Secondary cracking of C4 hydrocarbons from heavy oil catalytic pyrolysis.
Magazine article from: Canadian Journal of Chemical Engineering; 6/1/2006; ; 700+ words
; ...products. The produced C4 hydrocarbons can further undergo secondary...2005). To the study on C4 hydrocarbons secondary cracking is helpful...the reaction mechanisms of hydrocarbon catalytic pyrolysis. This...cracking performance of C4 hydrocarbons from heavy oil catalytic...
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The noble hydrocarbons.(Review)
Magazine article from: Chemistry and Industry; 6/4/2001; ; 700+ words
; ...sub.16] hydrocarbons (the stabilomer...as the chiral hydrocarbon twistane (3...Other synthetic hydrocarbons, that originally...as conjugated hydrocarbon tubes and non-Kekule hydrocarbons, which are finding...
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Importance of different volatile petroleum hydrocarbon fractions in human health risk assessment
Magazine article from: Human and Ecological Risk Assessment; 6/1/2003; ; 700+ words
; ...aliphatic and aromatic hydrocarbon fractions from five volatile petroleum hydrocarbon (VPH)-contaminated...Standard for petroleum hydrocarbons to investigate the...volatile petroleum hydrocarbons, VPH, hydrocarbon fractions, vapor...
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Basins hasten brewing of oil. (hydrocarbon formation in Antarctic)
Magazine article from: Science News; 3/23/1985; ; 700+ words
; ...2/13/82, p. 103). Hydrocarbons formed in mineralized mounds...accumulation of rapidly heated hydrocarbons, but in a very different...finding expands the spectrum of hydrocarbon formation processes," says...demonstration that thermally formed hydrocarbons are being produced in Antarctica...
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Distribution of Petroleum and Aromatic Hydrocarbons at a Former Crude Oil and Natural Gas Production Facility
Magazine article from: Soil & Sediment Contamination; 1/1/2007; ; 700+ words
; ...total petroleum hydrocarbons (TPH) and the...Petroleum hydrocarbon chain length information...were based on hydrocarbon chain length...longer chain length hydrocarbons (i.e., greater...thousands of different hydrocarbon and nonhydrocarbon...or aliphatic) hydrocarbons, aromatic ...
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Chlorinated Hydrocarbons
Encyclopedia entry from: The Gale Encyclopedia of Science
...tetrachloride: simple chlorinated hydrocarbons Important complex chlorinated hydrocarbons Chlorinated hydrocarbon polymers Chlorinated hydrocarbon...oils and coal. Chlorinated hydrocarbons are specific hydrocarbon molecules that also have atoms...
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Hydrocarbon
Encyclopedia entry from: The Gale Encyclopedia of Science
...chemical bonding A hydrocarbon is any chemical compound...after atom. Every hydrocarbon molecule is built...number of different hydrocarbons that can exist. Hydrocarbons...hydrogen atoms to form hydrocarbon molecules: Hydrogen...nothing but a proton.) Hydrocarbons are divided into ...
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hydrocarbon
Book article from: The Columbia Encyclopedia, Sixth Edition
hydrocarbon , any organic...carbon. The hydrocarbons differ both...Useful hydrocarbon mixtures...oils. Many hydrocarbons are useful...derived from hydrocarbons, either...atoms of the hydrocarbon molecule...
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Halogenated Hydrocarbons
Encyclopedia entry from: The Gale Encyclopedia of Science
Halogenated Hydrocarbons Halogenated hydrocarbons are derivatives of hydrocarbons (that is, organic compounds that only contain carbon and hydrogenatoms) that include some halogen atoms within their chemical structure. The most commonly encountered...
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Hydrocarbons
Book article from: World of Earth Science
...by the chemical industry. Hydrocarbons are classified on the basis...compounds they describe. Because hydrocarbons are nonpolar, they are generally...solvents. The aliphatic hydrocarbons are further divided into...and indeed, the simplest hydrocarbon) is methane, CH 4 . The...
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