biuret


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Related to biuret: Biuret test, Biuret reagent

biuret

 [bi´u-ret]
a urea derivative; its presence is detected after addition of sodium hydroxide and copper sulfate solutions by a pinkish-violet color (protein test) or a pink and finally a bluish color (urea test).
biuret reaction the reaction in biuret tests.
biuret test either of the tests done with biuret.

bi·u·ret

(bī-yū-ret'),
A derivative of urea obtained by heating, eliminating one NH3 between two ureas. Used in protein determinations.
Synonym(s): carbamoylurea

biuret

/bi·u·ret/ (bi´u-ret) a urea derivative whose presence is detected after addition of sodium hydroxide and copper sulfate solutions by a pinkish-violet color (protein test) or a pink and finally a bluish color (urea test).

biuret

A white crystalline substance, which is intermediate between urea and cyanuric acid, and formed by heating urea.

bi·u·ret

(bī'yŭr-et')
Obtained by eliminating one NH3 between two urea molecules. Used in protein determinations.
Synonym(s): carbamoylurea.

biuret

a urea derivative; its presence is detected after addition of sodium hydroxide and copper sulfate solutions by a pinkish-violet color (protein test) or a pink and finally a bluish color (urea test).
References in periodicals archive ?
39 g/L for the benzethonium chloride, biuret, modified biuret, and pyrocatechol violet, respectively, and for [lambda], the TUP results were 0.
1, as measured by the biuret assay, the pyrogallol red assay, and nephelometry.
Determination of total urinary protein, combining Lowry sensitivity and biuret specificity.
The calibration curve for the Biuret assay, made with human albumin concentrations of 0-10 g/L, gave an absorbance range (550 nm) of 0.
Methods for the determination of total urinary protein that use precipitation of protein and indirect biuret are accurate, but they also are time-consuming and, therefore, not widely used.
In addition, these authors found a good correlation between the Vitros method and the biuret method, taking the latter as reference.
Very few laboratories use the biuret method, which reacts with the peptide bonds in proteins, measuring all proteins more equally.
To validate further the modified dilution protocol we compared the pyrogallol red and Vitros methods to a manual biuret reference procedure.
Determinacion de concentracion de proteina: La cantidad de proteina en el extracto proteolitico crudo y las fracciones obtenidas, se determino por el metodo colorimetrico de biuret (Robinson & Hogden, 1940).
The protein concentrations (g/dL) were measured by using biuret method, the cholesterol was measured by using enzymatic method CHOD-PAP and the LDH was estimated by Modified IFCC Method, with the help of colorimetric estimation.
For the evaluation of deproteination the protein content was measured by using an adaptation of the standard Biuret protein assay: samples before and after fermentation were exposed to alkaline deproteination and the protein content in the supernatant was measured by the Biuret assay, the method adapted from Rao and Stevens (2006).