Dictionary of Chemistry [6th Ed.]
form constitute a pair of diastereoiso- mers. See optical activity. diatomaceous earthSee kiesel- guhr. diatomic moleculeA molec ...
dichloroethanoic acid See chloroethanoic acids. dichloromethane (methylene chlo- ride)A colourless, slightly toxic liq- uid, CH ...
diethanolamineSee ethanol- amine. diethyl etherSee ethoxyethane. differential scanning calorime- try(DSC)See thermal analysis. d ...
diketones are pungent-smelling yel- low oils, whereas the aromatic com- pounds are crystalline solids. 1,3- Diketones (or β-dike ...
(p-DMAB)A substituted aldehyde used in a presumptive test for LSD and for psilocybin. A 1% solution of p- BMAB is used in 10% mi ...
diol(dihydric alcohol)An *alcohol containing two hydroxyl groups per molecule. dioxan A colourless toxic liquid, C 4 H 8 O 2 ; r ...
moment is a measure of the polar na- ture of the bond (see polar mol- ecule); i.e. the extent to which the average electron char ...
two linked *monosaccharide mol- ecules. For example, sucrose com- prises one glucose molecule and one fructose molecule bonded t ...
sipative system the system is moving towards a state of equilibrium, which can be regarded as moving toward a point attractor in ...
talline solid, H 2 S 2 O 7 ; r.d. 1.9; m.p. 35 °C. It is commonly encountered mixed with sulphuric acid as it is formed by disso ...
synthesis of a new one complemen- tary to itself. Replication is initiated, controlled, and stopped by means of polymerase enzym ...
CH 3 (CH 2 ) 9 CH:CH 2 , obtained from pe- troleum and used in making *dode- cylbenzene. dodecylbenzene A hydrocarbon, CH 3 (CH ...
according to the International Com- mission on Radiological Protection. dosimeterAny device used to measure absorbed *dose of io ...
zinc chloride rather than ammonium chloride. The electrical characteris- tics are similar to those of the Leclanché cell but the ...
collected and the volume measured, from which the mass of nitrogen in a known mass of sample can be found. 2.A method ofÜnding t ...
ion (usually an amine salt or ionized imino group). They are used for acrylicÜbres and also for wool and silk, although they hav ...
E EACEmergency action code. See hazchem code. Earnshaw’s theorem The princi- ple that a system of particles interact- ing via an ...
EDTA Ethylenediaminetetraacetic acid, (HOOCCH 2 ) 2 N(CH 2 ) 2 N(CH 2 COOH) 2 , a compound that acts as a chelating agent, rever ...
right-hand side of the equation con- sists of the product of the same eigenfunction and a constant. Eigen- value equations occur ...
did not become available until 1961. It is named after Albert *Einstein. A Information from the WebElements site Einstein–Smol ...
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