acid dyes
Dyes that are anionic or have negatively charged groups such as carboxyls.

Microbiology. . 2009.

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  • Acid dye — is a member of a class of dye that is applied from an acidic solution. In the home or art studio, the acid used in the dyebath is often vinegar (acetic acid) or citric acid. The uptake rate of the dye is controlled with the use of sodium chloride …   Wikipedia

  • acid dye — Chem. any of a class of dyes containing one or more acidic groups, as the sulfo group: used in acid solution chiefly for dyeing wool and silk. [1885 90] * * * ▪ chemical compound       any bright coloured synthetic organic compound whose molecule …   Universalium

  • acid green — any of several green acid dyes, generally light g. SF …   Medical dictionary

  • Acid-fast — Acid fastness is a physical property of some bacteria referring to their resistance to decolorization by acids during staining procedures.cite journal |author=Madison B |title=Application of stains in clinical microbiology |journal=Biotech… …   Wikipedia

  • acid dye — n any of a large class of dyes that contain acidic groups usu. in the form of sodium or potassium salts, that are soluble in water, and that are used esp. in aqueous or alcoholic solution for staining cytoplasm and various acidophilic structures… …   Medical dictionary

  • acid–base reaction — ▪ chemistry Introduction       a type of chemical process typified by the exchange of one or more hydrogen ions, H+, between species that may be neutral (molecules, such as water, H2O; or acetic acid, CH3CO2H) or electrically charged (ions, such… …   Universalium

  • acid dye — noun dye in which the chromophore is part of a negative ion • Hypernyms: ↑dye, ↑dyestuff • Hyponyms: ↑metallized dye * * * noun or acid color : any of a large class of dyes that contain acidic groups (as sulfonic or ca …   Useful english dictionary

  • acid-fast — Denoting bacteria that are not decolorized by acid alcohol after having been stained with dyes such as basic fuchsin; e.g., the mycobacteria and nocardiae. * * * acid fast as əd .fast adj not easily decolorized by acids (as when stained) used esp …   Medical dictionary

  • dyes —    Soluble substances that add color to textiles. Dyes are classified into groups that have similar chemical characteristics (e.g. aniline acid and azo). They are incorporated into the fiber by chemical reaction, absorption, or dispersion …   Forensic science glossary

  • acid fast — Refers to bacteria like the mycobacteria that cannot be easily decolorized with acid alcohol after being stained with dyes such as basic fuchsin …   Dictionary of microbiology

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