Search the Dictionary

r caustic alkali. Encyc. Brit. Hydrolitic ferment (Physiol. Chem.), a ferment, enzyme, or chemical ferment, which acts only in the presence of water, and which causes the substance acted upon to take up a molecule of water. Thus, diastase of malt, ptyalin of saliva, and boiling dilute sulphuric acid all convert starch…

A physician who explained or treated diseases upon chemical principles; one who practiced iatrochemistry.

physicians in Flanders, in the 17th century, who held that health depends upon the proper chemical relations of the fluids of the body, and who endeavored to explain the conditions of health or disease by chemical principles.

nce; esp., in pl., things which can not be placed or used together because of a change of chemical composition or of opposing medicinal qualities; as, the incompatibles of iron.

other animal fluids, and convertible into red and blue indigo (urrhodin and uroglaucin). Chemically, it is indoxyl sulphate of potash, C8H6NSO4K, and is derived from the indol formed in the alimentary canal. Called also uroxanthin.

resembles zinc, being white or lead gray, soft, malleable and easily fusible, but in its chemical relation it resembles aluminium or gallium. Symbol In. Atomic weight, 113.4.

rritable; irascible; easily provoked; as, an inflammable temper. Inflammable air, the old chemical name for hydrogen.

To bury or place in warm earth for chemical or medicinal purposes.

ary for life; devoid of an organized structure; unorganized; lifeness; inanimate; as, all chemical compounds are inorganic substances.

Pertaining to, or containing, iodine. See -ous (chemical suffix). Iodous acid, a hypothetical acid, analogous to chlorous acid.

of the elements which appear at the respective poles when a body is subjected to electro-chemical decomposition. Cf. Anion, Cation.

Any agent by which irritation is produced; as, a chemical irritant; a mechanical or electrical irritant.

merism (Chem.), the condition or relation of certain (metameric) substances, which, while chemically identical (in that they have the same composition, the same molecular weights, and the same ultimate constitution), are yet physically different, as in their action on polarized light, as dextro- and lævo-tartaric acids…

ixture of substances, containing sulphur in a loose state of combination, and forming the chemical basis of epidermal tissues, such as horn, hair, feathers, and the like. It is an insoluble substance, and, unlike elastin, is not dissolved even by gastric or pancreatic juice. By decomposition with sulphuric acid it yiel…

f a chemist; also, a place devoted to experiments in any branch of natural science; as, a chemical, physical, or biological laboratory. Hence, by extension, a place where something is prepared, or some operation is performed; as, the liver is the laboratory of the bile.

eave in solitude. (b) To desist or refrain from having to do with; as, to leave dangerous chemicals alone. -- To leave off. (a) To desist from; to forbear; to stop; as, to leave off work at six o'clock. (b) To cease wearing or using; to omit to put in the usual position; as, to leave off a garment; to leave off the ta…

tissues and organs, as the spleen, pancreas, etc., and likewise in the vegetable kingdom. Chemically it is to be considered as amido-caproic acid. (CH3)2CH.CH2.CH(NH2)-COOH. L-leucine, the natural form, is present in most proteins.

stance characterizing wood cells and differing from cellulose in its conduct with certain chemical reagents.

A bond of affinity, or a unit of valence between atoms; -- applied to a unit of chemical force or attraction.

Serving to measure or ascertain chemical equivalents; stoichiometric. [R.]