| D002849 |
Chromatography, Gas |
Fractionation of a vaporized sample as a consequence of partition between a mobile gaseous phase and a stationary phase held in a column. Two types are gas-solid chromatography, where the fixed phase is a solid, and gas-liquid, in which the stationary phase is a nonvolatile liquid supported on an inert solid matrix. |
Chromatography, Gas-Liquid,Gas Chromatography,Chromatographies, Gas,Chromatographies, Gas-Liquid,Chromatography, Gas Liquid,Gas Chromatographies,Gas-Liquid Chromatographies,Gas-Liquid Chromatography |
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| D005075 |
Biological Evolution |
The process of cumulative change over successive generations through which organisms acquire their distinguishing morphological and physiological characteristics. |
Evolution, Biological |
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| D005118 |
Extraterrestrial Environment |
The environment outside the earth or its atmosphere. The environment may refer to a closed cabin (such as a space shuttle or space station) or to space itself, the moon, or other planets. |
Space (Astronomy),Environment, Extraterrestrial,Environments, Extraterrestrial,Extraterrestrial Environments,Spaces (Astronomy) |
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| D005844 |
Geology |
The science of the earth and other celestial bodies and their history as recorded in the rocks. It includes the study of geologic processes of an area such as rock formations, weathering and erosion, and sedimentation. (From McGraw-Hill Dictionary of Scientific and Technical Terms, 6th ed) |
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| D006838 |
Hydrocarbons |
Organic compounds that primarily contain carbon and hydrogen atoms with the carbon atoms forming a linear or circular structure. |
Hydrocarbon,Saturated Hydrocarbons,Unsaturated Hydrocarbons,Hydrocarbons, Saturated,Hydrocarbons, Unsaturated |
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| D000596 |
Amino Acids |
Organic compounds that generally contain an amino (-NH2) and a carboxyl (-COOH) group. Twenty alpha-amino acids are the subunits which are polymerized to form proteins. |
Amino Acid,Acid, Amino,Acids, Amino |
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| D055593 |
Geological Phenomena |
Structures, properties, and processes involving the inanimate matter of Earth. |
Geological Concepts,Geological Processes,Geological Phenomenon,Geological Process,Geophysical Phenomena,Geophysical Process,Geophysical Processes,Concept, Geological,Concepts, Geological,Geological Concept,Phenomena, Geological,Phenomena, Geophysical,Phenomenon, Geological,Process, Geological,Process, Geophysical,Processes, Geological,Processes, Geophysical |
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