| D007202 |
Indicators and Reagents |
Substances used for the detection, identification, analysis, etc. of chemical, biological, or pathologic processes or conditions. Indicators are substances that change in physical appearance, e.g., color, at or approaching the endpoint of a chemical titration, e.g., on the passage between acidity and alkalinity. Reagents are substances used for the detection or determination of another substance by chemical or microscopical means, especially analysis. Types of reagents are precipitants, solvents, oxidizers, reducers, fluxes, and colorimetric reagents. (From Grant & Hackh's Chemical Dictionary, 5th ed, p301, p499) |
Indicator,Reagent,Reagents,Indicators,Reagents and Indicators |
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| D008628 |
Mercury |
A silver metallic element that exists as a liquid at room temperature. It has the atomic symbol Hg (from hydrargyrum, liquid silver), atomic number 80, and atomic weight 200.59. Mercury is used in many industrial applications and its salts have been employed therapeutically as purgatives, antisyphilitics, disinfectants, and astringents. It can be absorbed through the skin and mucous membranes which leads to MERCURY POISONING. Because of its toxicity, the clinical use of mercury and mercurials is diminishing. |
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| D012457 |
Salicylamides |
Amides of salicylic acid. |
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| D013046 |
Specific Gravity |
The ratio of the density of a material to the density of some standard material, such as water or air, at a specified temperature. |
Relative Density,Densities, Relative,Density, Relative,Gravities, Specific,Gravity, Specific,Relative Densities,Specific Gravities |
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| D013053 |
Spectrophotometry |
The art or process of comparing photometrically the relative intensities of the light in different parts of the spectrum. |
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