indicator dye

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• Urine-indicator dye — is a fictional substance thought to form some sort of colored cloud in a pool to indicate the presence of urine. It s commonly believed to exist in the United States, Canada, and Spain amongst other countries.Experts on such matters say although… …   Wikipedia

• dye — dyable, dyeable, adj. dyer, n. /duy/, n., v., dyed, dyeing. n. 1. a coloring material or matter. 2. a liquid containing coloring matter, for imparting a particular hue to cloth, paper, etc. 3. color or hue, esp. as produced by dyeing. 4. of the… …   Universalium

• indicator dilution curve — a graphic representation of the concentration of an indicator added in known quantity to the circulatory system and measured over time at a specific point in the system; the indicator is usually a dye (see dye dilution c.), radionuclide, or cold… …   Medical dictionary

• dye dilution curve — an indicator dilution curve in which the indicator is a dye, usually indocyanine green; it is used in studies of cardiac output and other aspects of cardiovascular function …   Medical dictionary

• dye dilution method — a type of indicator dilution method for assessing flow through the circulatory system; the indicator is a dye, usually indocyanine green …   Medical dictionary

• indicator dilution method — any of several methods for assessing flow through the circulatory system by injection of a known quantity of an indicator, such as a dye, radionuclide, or chilled liquid, into the system and monitoring its concentration over time at a specific… …   Medical dictionary

• indicator — 1. In chemical analysis, a substance that changes color within a certain definite range of pH or oxidation potential, or in any way renders visible the completion of a chemical reaction; e.g., litmus, phenolsulfonphthalein. 2 …   Medical dictionary

• fluorescent dye — noun a yellow dye that is visible even when highly diluted; used as an absorption indicator when silver nitrate solution is added to sodium chloride in order to precipitate silver chloride (turns pink when no chloride ions are left in solution… …   Useful english dictionary

• Leuco dye — A leuco dye is a dye whose molecules can acquire two forms, one of which is colorless.For example, the spiro form of an oxazine is a colorless leuco dye; the conjugated system of the oxazine and another aromatic part of the molecule is separated… …   Wikipedia

• chemical indicator —       any substance that gives a visible sign, usually by a colour change, of the presence or absence of a threshold concentration of a chemical species, such as an acid or an alkali in a solution. An example is the substance called methyl yellow …   Universalium

• Complexometric indicator — A complexometric indicator is an ionochromic dye that undergoes a definite color change in presence of specific metal ions.[1] It forms a weak complex with the ions present in the solution, which has a significantly different color from the form… …   Wikipedia