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Term Definition Article Siehe auch
mass efficiency: The mass of the purified product divided by the total mass of all substances used in the synthesis, apart from cooling water or ice, if they do not have contact with the rection mixture. If the mass efficiency is expressed in a dimensionless number (e.g. in [g/g]), it equals the reciprocal of the E-factor or environmental coefficient according to Sheldon (R. Sheldon, CHEMTECH.1994 3, 38-47) atom economy, energy efficiency
melting point:
Wikipedia: melting point
Temperature at which a solid becomes fluid under normal pressure. boiling point
Wikipedia: metabolism
Synonym: biotransformation. Chemical reaction(s) of foreign substances in an organism which are catalyzed by enzymes. in higher organisms the liver is the primary organ where biotransformation of chemicals takes place.
Wikipedia: mineralization
The complete degradation of an organic compound in the environment to inorganic endproducts like water, carbon dioxide, nitrogen etc.
mobile phase:
Wikipedia: mobile phase
Synonym: eluent. The counterpart to the stationary phase in chromatography.
molecular formula:
Wikipedia: molecular formula
The molecular formula is given here according to the Hill system. First the C and H atoms are given. After that all other elements are given in alphabetical order.
(This system sometimes gives unusual notations for inorganic compounds.)
molecular interaction potential: Attractive and repulsive forces between molecules - in chromatography between solute and stationary phase, which cause selsective adsorption adn desorption and thus produce the separation of substances. The molecular interaction potential is also responsible for the solubility of a solue in a liquid mobile phase.
Wikipedia: MSD
Mass specific detector (EI: electron impact induced)
. Nonspecific, can detect all solutes, also provides some information on the chemicals structure of the solutes detected.
Wikipedia: mutagenicity
The potential of a chemical substance to induce a permanent change in the amount or structure of the genetic material of an organism. This change may affect a single gene, a gene segment or a whole chromosome. cancerogenicity
mutation in microorganisms: Mutagenic properties of a substance are usually determined with bacteria or yeast as test systems. This is predominantly the Ames test with Salmonella (mostly with inclusion of a mammalian metabolizing enzyme system). mutagenicity
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