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Precipitate :: Precipitate (n.) An insoluble substance separated from a solution in a concrete state by the action of some reagent added to the solution, or of some force, such as heat or cold. The precipitate may fall to the bottom (whence the name), may be diffused through the solution, or may float at or near the surface..

Ureameter :: Ureameter (n.) An apparatus for the determination of the amount of urea in urine, in which the nitrogen evolved by the action of certain reagents, on a given volume of urine, is collected and measured, and the urea calculated accordingly..

Lignin :: Lignin (n.) A substance characterizing wood cells and differing from cellulose in its conduct with certain chemical reagents.

Nucleus :: Nucleus (n.) A body, usually spheroidal, in a cell or a protozoan, distinguished from the surrounding protoplasm by a difference in refrangibility and in behavior towards chemical reagents. It is more or less protoplasmic, and consists of a clear fluid (achromatin) through which extends a network of fibers (chromatin) in which may be suspended a second rounded body, the nucleolus (see Nucleoplasm). See Cell division, under Division..

Indicator :: Indicator (n.) That which indicates the condition of acidity, alkalinity, or the deficiency, excess, or sufficiency of a standard reagent, by causing an appearance, disappearance, or change of color, as in titration or volumetric analysis..

Platinum :: Platinum (n.) A metallic element, intermediate in value between silver and gold, occurring native or alloyed with other metals, also as the platinum arsenide (sperrylite). It is heavy tin-white metal which is ductile and malleable, but very infusible, and characterized by its resistance to strong chemical reagents. It is used for crucibles, for stills for sulphuric acid, rarely for coin, and in the form of foil and wire for many purposes. Specific gravity 21.5. Atomic weight 194.3. Symbol Pt. Fo

Precipitant :: Precipitant (n.) Any force or reagent which causes the formation of a precipitate.

Albumin :: Albumin (n.) A thick, viscous nitrogenous substance, which is the chief and characteristic constituent of white of eggs and of the serum of blood, and is found in other animal substances, both fluid and solid, also in many plants. It is soluble in water and is coagulated by heat and by certain chemical reagents..

Developer :: Developer (n.) A reagent by the action of which the latent image upon a photographic plate, after exposure in the camera, or otherwise, is developed and visible..

Saponifier :: Saponifier (n.) That which saponifies; any reagent used to cause saponification.

Chemical :: Chemical (n.) A substance used for producing a chemical effect; a reagent.

Test :: Test (n.) A reaction employed to recognize or distinguish any particular substance or constituent of a compound, as the production of some characteristic precipitate; also, the reagent employed to produce such reaction; thus, the ordinary test for sulphuric acid is the production of a white insoluble precipitate of barium sulphate by means of some soluble barium salt..

Reagent :: Reagent (n.) A substance capable of producing with another a reaction, especially when employed to detect the presence of other bodies; a test..

Acidimetry :: Acidimetry (n.) The measurement of the strength of acids, especially by a chemical process based on the law of chemical combinations, or the fact that, to produce a complete reaction, a certain definite weight of reagent is required..

Hydrometallurgy :: Hydrometallurgy (n.) The art or process of assaying or reducing ores by means of liquid reagents.

Test :: Test (v. t.) To examine or try, as by the use of some reagent; as, to test a solution by litmus paper..

Paraffine :: Paraffine (n.) A white waxy substance, resembling spermaceti, tasteless and odorless, and obtained from coal tar, wood tar, petroleum, etc., by distillation. It is used as an illuminant and lubricant. It is very inert, not being acted upon by most of the strong chemical reagents. It was formerly regarded as a definite compound, but is now known to be a complex mixture of several higher hydrocarbons of the methane or marsh-gas series; hence, by extension, any substance, whether solid, liquid, or

Hydrometallurgical :: Hydrometallurgical (a.) Of or pertaining to hydrometallurgy; involving the use of liquid reagents in the treatment or reduction of ores.

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