ninhydrin


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Related to ninhydrin: Ninhydrin test

nin·hy·drin

(nin-hī'drin),
A substance that Reacts with free amino acids to yield CO2, NH3, and an aldehyde, the NH3 further yielding a colored product (diketohydrindylidene-diketohydrindamine, a bi-indanedione derivative also called Ruhemann purple).
See also: ninhydrin reaction.

ninhydrin

An oxidising reagent that reacts with amino acids and proteins, which is used to screen urine specimens for presence of, and semiquantify, alpha-amino acids as the specimen changes colours.

ninhydrin

Triketohydrindene Clinical toxicology An oxidizing reagent that reacts with amino acids and proteins, used to screen urine specimens for presence of, and semiquantify, α-amino acids, as it changes colors

nin·hy·drin

(nin-hī'drin)
Triketohydrindene, an analytic reagent that reacts with free amino acids to yield CO2, NH3, and an aldehyde, the NH3 produced yielding a colored product.
See also: ninhydrin reaction
[Ger. trade name, fr. the chemical name]

ninhydrin

a reagent used to detect AMINO ACIDS by the blue colour produced (yellow with proline). The quantity of the amino acid is proportional to the ABSORBANCE of the solution after reaction with ninhydrin. The technique can be used to detect amino acids on chromatograms, for example (see CHROMATOGRAPHY).
References in periodicals archive ?
The literature review shows that study of reactions of ninhydrin is a subject of more interest and some of the useful reactions such as amidoalkylation[5], Knoevenagel condensation [6], oxidation [7,8], reduction [9,10], reaction with enols and aromatic compounds [11], synthesis of heterocyclic compounds [12], Friedel-Crafts type reaction [13-16], Kolbe-Schmitt [17], Passerini [18], Wittig [19] and Morita-Baylis-Hillman [20] have been investigated in this area.
The ninhydrin test used here to evaluate honeydew production is widely used for antifeedant activity studies on aphids (Sadeghi et al.
On analytical balance 2 g of ninhydrin was weighed, then dissolved in 3 ml ethanol, diluted with water to 100 ml, adjusted to pH 7.
Finger printing using cyanoacrylate fuming and ninhydrin.
The amino acid contents in CV aqueous extract was determined by ninhydrin colorimetric method (Oka et al.
Different plant Tests constituents Test for alkaloids Mayer's test, Dragendroff's test, Wagner's test, and Hager's test Test for proteins and Millon's test, Biuret test, and amino acids ninhydrin test Test for anthraquinones Modified Borntrager's test Test for flavonoids Ferric chloride test and lead acetate test Test for carbohydrates Molisch's test Test for reducing sugars Fehling's test and Benedict's test Test for saponins Foam formation test Test for tannins Ferric chloride test and lead acetate test Test for steroids, Liebermann-Burchard test, triterpenoids, and Salkowski test, Noller's test, cardiac glycosides Legal's test, Baljet test, and Keller Kiliani's test TABLE 2: Effect on electrolyte excretion in urine.
The section then moves into discussion of fingerprints in blood, vacuum metal deposition, the cyanoacrylate fuming method, ninhydrin and ninhydrin analogues, nanoparticles, friction ridge detection, statistics and probability, and digital imaging.
As a result, it was confirmed that much protein was included in carbonate warm water by a ninhydrin reaction.
John Iwanik said ninhydrin gas being used in the lab may have escaped from the ventilation system.
The eluted spots were sprayed with resorcinol-sulphuric acid, ammonium molybdate, ninhydrin, a-naphthol and Dragendorff spray reagents for further confirmation (Prabhakara et al.
The A spot was positive for both Millon's and the Ninhydrin reaction.