Search the Dictionary

NH2, obtained by the action of ammonia upon chloride of benzoyl, as also by several other reactions with benzoyl compounds.

A yellow, or greenish, viscid fluid, usually alkaline in reaction, secreted by the liver. It passes into the intestines, where it aids in the digestive process. Its characteristic constituents are the bile salts, and coloring matters.

Pertaining to, or formed from, two molecules; as, a bimolecular reaction (a reaction between two molecules).

n; a blowtube. Blowpipe analysis (Chem.), analysis by means of the blowpipe. -- Blowpipe reaction (Chem.), the characteristic behavior of a substance subjected to a test by means of the blowpipe.

romine and caustic potash upon wood spirit, alcohol, or acetone, as also by certain other reactions. In composition it is the same as chloroform, with the substitution of bromine for chlorine. It is somewhat similar to chloroform in its effects. Watts.

etable kingdom it is found more or less abundantly in the seeds of leguminous plants. Its reactions resemble those of alkali albumin. [Written also caseine.]

A process by which reaction occurs in the presence of certain agents which were formerly believed to exert an influence by mere contact. It is now believed that such reactions are attended with the formation of an intermediate compound or compounds, so that by alternate composition and decomposition the agent is appare…

Synthesis of organic compounds by energy derived from chemical changes or reactions. Chemosynthesis of carbohydrates occurs in the nitrite bacteria through the oxidation of ammonia to nitrous acid, and in the nitrate bacteria through the conversion of nitrous into nitric acid. -- Chem`o*syn*thet"ic (#), a.…

-current circuit to impede or throttle the current, or to change its phase; --called also reactance coil or reactor, these terms being now preferred in engineering usage.

d lividity, rapidly passing into a state of collapse, followed by death, or by a stage of reaction of fever. -- Cholera bacillus. See Comma bacillus. -- Cholera infantum, a dangerous summer disease, of infants, caused by hot weather, bad air, or poor milk, and especially fatal in large cities. -- Cholera morbus, a d…

hange into a curdlike or semisolid state, not by evaporation but by some kind of chemical reaction; to curdle; as, rennet coagulates milk; heat coagulates the white of an egg.

a thickened, curdlike, insoluble state, not by evaporation, but by some kind of chemical reaction; as, the spontaneous coagulation of freshly drawn blood; the coagulation of milk by rennet, or acid, and the coagulation of egg albumin by heat. Coagulation is generally the change of an albuminous body into an insoluble…

th light and heat. Combustion results is common cases from the mutual chemical action and reaction of the combustible and the oxygen of the atmosphere, whereby a new compound is formed. Ure. Supporter of combustion (Chem.), a gas as oxygen, the combination of which with a combustible, as coal, constitutes combustion.…

To subject to such reactions or processes that diazo compounds, or their derivatives, shall be produced by chemical exchange or substitution.

A similar oxide, having a slight alkaline reaction, as lime, magnesia, strontia, baryta.

Pertaining the reaction (contraction) of the muscles under electricity, or their sensibility to it.

Designating, or pert. to, a reaction which occurs with absorption of heat; formed by such a reaction; as, an endothermic substance; -- opposed to exothermic.

Characterized by, or formed with, evolution of heat; as, an exothermic reaction; -- opposed to endothermic.

An explosive agent; a compound or mixture susceptible of a rapid chemical reaction, as gunpowder, or nitro-glycerine.

and disease of malt. globular proteins, capable of catalyzing a wide variety of chemical reactions, not merely hydrolytic. The full set of enzymes causing production of ethyl alcohol from sugar has been identified and individually purified and studied. See enzyme