dye

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dye

 [di]
any of various colored substances containing auxochromes and thus capable of coloring substances to which they are applied; used for staining and coloring, as test reagents, and as therapeutic agents.

dye

(),
A stain or coloring matter; a compound consisting of chromophore and auxochrome groups attached to one or more benzene rings, its color being due to the chromophore and its dyeing affinities to the auxochrome. Dyes are used for intravital coloration of cells, staining tissues and microorganisms, as antiseptics and germicides, and some as stimulants of epithelial growth. For individual dyes, see the specific names. Commonly but improperly used for radiographic contrast medium.
[A.S. deah, deag]

dye

(di) any colored substance containing auxochromes and thus capable of coloring substances to which it is applied; used for staining and coloring, as a test reagent, and as a therapeutic agent.
acid dye , acidic dye one which is acidic in reaction and usually unites with positively charged ions of the material acted upon.
amphoteric dye  one containing both reactive basic and reactive acidic groups, and staining both acidic and basic elements.
anionic dye  acid d.
basic dye  one which is basic in reaction and unites with negatively charged ions of the material acted upon.
cationic dye  basic d.

dye

[dī]
Etymology: AS, deag
1 v, to apply coloring to a substance.
2 n, a chemical compound capable of imparting color to a substance to which it is applied. Various dyes are used in medicine as stains for tissues, test reagents, therapeutic agents, and coloring agents in pharmaceutic preparations.

dye

()
A stain or coloring matter; a compound consisting of chromophore and auxochrome groups attached to one or more benzene rings, its color being due to the chromophore and its dyeing affinities to the auxochrome. Dyes are used for intravital coloration of living cells, staining tissues and microorganisms, as antiseptics and germicides, and some as stimulants of epithelial growth. Commonly used term for radiographic contrast medium.
[A.S. deah, deag]

dye

()
A stain or coloring matter. Commonly but improperly used to mean radiographic contrast medium.
[A.S. deah, deag]

dye

any of various colored substances containing auxochromes and thus capable of coloring substances to which they are applied; used for staining and coloring, as test reagents, and as therapeutic agents.

acridine dye
acriflavine and proflavine are antiseptic dyes.
azo dye
dyes like scarlet red and phenazopyridine are used as antiseptics to be applied topically or as urinary antiseptics.
diagnostic dye
several diagnostic test procedures involve the administration of a dye and determination of the rate of excretion, either by measuring levels remaining in the body or amounts excreted in the urine, feces, etc. Examples are the bromsulfthalein (BSP) test for liver function, and the phenolsulfonphthalein (PSP) renal function test.
dye dilution method
the standard method of measuring circulating plasma volume; based on the degree of dilution of a physiologically inert dye injected intravenously.
vital dye
see vital stain.

Patient discussion about dye

Q. Has anyone had an allergic reaction to gadolinium dye, MRI contrast agents, I have had a severe reaction. I would like to know the long term effects of this dye. And if anyone else has had or heard of problems and reactions to it. Please answer me. Thank you

A. In 1969 I almost died from the IVP dye. I had no idea I was allergic and when I awoke I was in a "recovery room." The doctor told me to always tell any physicians/paramedics etc of my allergy status regarding the dye. I now have chronic back pain, have a history of cancer in the family and the doctor wants to do a scan (including dye) but when I emphasized that I was allergic he backed off. Now I am wondering if there is anything else that can be done to test the bone (scan) without the dye. Any answers? Thanks

More discussions about dye
References in periodicals archive ?
The pens were also analyzed with the anionic dye capillary electrophoresis method; however, the electropherograms were similar for most of the pens and revealed that few, if any, anionic dyes were present.
To this end, one buffer was designed to adequately separate cationic dyes (general class of basic dyes), and another buffer was designed to separate anionic dyes (general class of acidic dyes).
At lower pH the biosorbent surface turned out to be positively charged and electrostatic attraction develops between the positively charged biomass and negatively charged anionic dyes.
suggested that at low pH, a large number of weak base groups present on the biomass become protonated and acquire positive charge which makes it easier for the anionic dyes to bind with the biomass [24].
Anionic dyes such as Congo red and bromochlorophenol blue form colored ion-pairing complexes with oseltamivir to produce a colored product extractable in ethyl acetate.
Dogan, Removal of Reactive Blue 221 and Acid Blue 62 Anionic Dyes from Aqueous Solutions by Sepiolite, Dyes and Pigments, 65, 251 (2005).
At lower pH values, the biosorbent surface turned out to be positively charged and electrostatic attraction developed between positively charged biomass and negatively charged anionic dyes.
The textile dyes for cellulosic fibres are designed to have low solubility in water and these become very difficult to dissolve in very hard water because calcium and magnesium ions reduce the solubility of anionic dyes causing them to aggregate or even precipitate onto the fibre [4].
At lower pH the biosorbent surface turned out to be positively charged and electrostatic attraction developed between positively charged biomass and negatively charged anionic dyes (Bhatti and Safa 2012).
Similar to direct dyes, they are anionic dyes with general formula RSO3Na but they do not dye or poor dye cellulosic fiber without consuming color fastness.