Dictionary of Chemistry [6th Ed.]
agent such as phosphorus(III) chlo- ride, phosphorus(V) chloride, or sul- phur dichloride oxide and is used to introduce ethanoy ...
b.p. 77.06°C. It is used as a solvent and inÛavourings and perfumery. ethyl group The organic group CH 3 CH 2 –. ethyl iodide Se ...
scattering theory for short-range order. excimerSee exciplex. exciplexA combination of two dif- ferent atoms that exists only in ...
divided by an arbitrary extensive variable, such as the volume, an *in- tensive variable results. A macro- scopic system can be ...
energy is eventually converted into heat. Since this process involves colli- sions, the rate at which it occurs de- pends on how ...
F FAB mass spectroscopy See fast- atom bombardment mass spec- troscopy. face-centred cubic (f.c.c.)See cubic crystal. fac-isomer ...
phere, especially by factory chim- neys. faradSymbol F. The SI unit of ca- pacitance, being the capacitance of a capacitor that, ...
tant in metabolism. Long-chain fatty acids (more than 8–10 carbon atoms) most commonly occur as con- stituents of certain lipids ...
potassium is dominant with a smaller proportion of sodium and negligible calcium; and the plagio- clase feldspars, which vary in ...
ergy bands), in insulators it lies in the valence band, and in semicon- ductors it falls in the gap between the conduction band ...
Ürst of a class of similar complexes called *sandwich compounds. Its sys- tematic name is di-π-cyclopentadi- enyl iron(II). ferr ...
which a high negative voltage is ap- plied to a metal tip placed in an evac- uated vessel some distance from a glass screen with ...
on the allowed energy levels of the atom. Ünger domain AÜnger-shaped structure produced in a protein when a series of the consti ...
able it to be used as the basis of a *temperature scale. ÛagpoleSee ring conformations. ÛameA hot luminous mixture of gases unde ...
ÛocculationThe process in which particles in a colloid aggregate into larger clumps. Often, the term is used for a reversible ag ...
state may have been reached either as a result of a randomÛuctuation or an external force (such as an electric or magneticÜeld) ...
and *cryolite (Na 3 AlF). The element is obtained by electrolysis of a molten mixture of potassiumÛuoride and hydrogenÛuoride. I ...
sion process for the evolution of vari- ables in a system. The Fokker–Planck equation, which can be used to analyse such problem ...
methanal (formaldehyde) in water with methanol as a stabilizer; r.d. 1.075–1.085. When kept at tempera- tures below 25°C a white ...
periodic function as a series of trigonometric functions. Thus, f(x) = a 0 + (a 1 cosx + b 1 sinx) + (a 2 cos2x + b 2 sin2x)+... ...
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