Biuret (/ˈbjurɛt/ BYUR-ret) is a chemical compound with the chemical formula HN(CONH2)2. It is a white solid that is soluble in hot water. A variety of...

In chemistry, the biuret test (IPA: /ˌbaɪjəˈrɛt/, /ˈbaɪjəˌrɛt/), also known as Piotrowski's test, is a chemical test used for detecting the presence of...

In enzymology, a biuret amidohydrolase (EC 3.5.1.84) is an enzyme that catalyzes the chemical reaction biuret + H2O ⇌ {\displaystyle \rightleftharpoons...

Lansoprazole, sold under the brand name Prevacid among others, is a medication which reduces stomach acid. It is a proton pump inhibitor (PPI), used to...

precipitant in protein crystallography and is also an ingredient in the Biuret reagent which is used to measure protein concentration. This ingredient...

protein type. The traditional method for measuring total protein uses the biuret reagent, but other chemical methods such as dye-binding and refractometry...

streams. Intermediates in the dehydration include both isocyanic acid, biuret, and triuret: H2N-CO-NH2 → HNCO + NH3 H2N-CO-NH2 + HNCO → H2N-CO-NH-CO-NH2...

160 °C: CO(NH2)2 → [NH4]+[OCN]− → NH3 + HNCO Heating above 160 °C yields biuret NH2CONHCONH2 and triuret NH2CONHCONHCONH2 via reaction with isocyanic acid:...

reactions of copper ions with the peptide bonds under alkaline conditions (the Biuret test) with the oxidation of aromatic protein residues. The Lowry method...

to 1.5 mg/mL), similar to Lowry protein assay, Bradford protein assay or biuret reagent. The total protein concentration is exhibited by a color change...

stripper, so residence times in these stages are designed to be short. Biuret is formed when two molecules of urea combine with the loss of a molecule...

detect the presence of cuprous ions, due to its purple coloration via a biuret reaction. In this assay, two molecules of bicinchoninic acid chelate a single...

Hofmeister made the proposal in the morning, based on his observations of the biuret reaction in proteins. Hofmeister was followed a few hours later by Emil...

other compounds containing the phenol functional group. Therefore, the biuret test or the ninhydrin reaction are used along with it to confirm the presence...

to insoluble red copper(I) oxide. Copper(II) sulfate is also used in the Biuret reagent to test for proteins. Copper sulfate is used to test blood for anemia...

+ R'NCO → R2NC(O)N(H)R' The addition of an isocyanate to a urea gives a biuret: R2NC(O)N(H)R' + R''NCO → R2NC(O)NR'C(O)NHR'' Reaction between a di-isocyanate...

quantitation compared to previous methods: the Lowry procedure and the biuret assay. Unlike the previous methods, the Bradford assay is not susceptible...

responses to tests for proteins used by physiological chemists - a positive Biuret test, precipitation by inorganic salts and cleavage by proteolytic enzymes...

a chemical reaction to determine protein concentration. The Biuret assay utilizes a biuret reagent which turns purple in the presence of proteins due to...

\rightleftharpoons } biuret + CO2 Thus, the two substrates of this enzyme are cyanuric acid and H2O, whereas its two products are biuret and CO2. This enzyme...

identify pregnancy, a fodder for ruminants that used newsprint, a synthesis of biuret that could be used as an element of fodder, along with hundreds of other...

1002/14356007.n10_n03.pub2. ISBN 978-3-527-30673-2. Mikkelsen, R.L. (2007). "Biuret in Urea Fertilizers" (PDF). Better Crops. 91 (3): 6–7. Archived from the...

H2NC(O)NHCO2H. It is a carbamic acid, the carboxylated derivative of urea. Biuret can be viewed as the amide of allophanic acid. The compound can be prepared...

reduction Bischler–Möhlau indole synthesis Bischler–Napieralski reaction Biuret test Blaise ketone synthesis Blaise reaction Blanc reaction Blanc chloromethylation...

the condensation reaction among 2 moles of dicyandiamide and 1 mole of biuret. 2 C2H4N4 + C2H5N3O2 → 2C3H5N5O + NH3 Ammeline is weakly acidic with pKa...

Alternative protein assays include: Ultraviolet–visible spectroscopy RGBradford Biuret protein assay Lowry protein assay BCA protein assay Amido black protein...

used in animal nutrition to refer collectively to components such as urea, biuret, and ammonia, which are not proteins but can be converted into proteins...

glucose and fructose The bicinchoninic acid assay tests for proteins The Biuret test tests for proteins and polypeptides Bradford protein assay measures...

of the Schiff test. He also worked in the field of amino acids and the Biuret reagent. Born in Frankfurt am Main, Schiff was a student of Friedrich Wöhler...

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