ENSAYO DE BIURET PDF

It is a white solid that is soluble in hot water. The term "biuret" also describes a family of organic compounds with the functional group - HN-CO- 2 N-. A variety of organic derivatives are known. Also known as carbamylurea , it results from the condensation of two equivalents of urea. As such, it is an undesirable impurity in urea-based fertilizers. The parent compound can be prepared by heating urea above the melting point at which temperature ammonia is expelled: [3].

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It is a white solid that is soluble in hot water. The term "biuret" also describes a family of organic compounds with the functional group - HN-CO- 2 N-. A variety of organic derivatives are known.

Also known as carbamylurea , it results from the condensation of two equivalents of urea. As such, it is an undesirable impurity in urea-based fertilizers. The parent compound can be prepared by heating urea above the melting point at which temperature ammonia is expelled: [3]. For example, the trimer of 1,6-hexamethylene diisocyanate is also known as HDI-biuret.

In the anhydrous material, the molecule is planar and unsymmetrical in the solid state owing to intramolecular hydrogen bonding. The terminal C-N distances of 1.

It crystallizes from water as the hydrate. Biuret is also used as a non-protein nitrogen source in ruminant feed, [5] where it is converted into protein by gut microorganisms.

The biuret test is a chemical test for proteins and polypeptides. It is based on the biuret reagent , a blue solution that turns violet upon contact with proteins, or any substance with peptide bonds.

The test and reagent do not actually contain biuret; they are so named because both biuret and proteins have the same response to the test. Biuret was first prepared and studied by Gustav Heinrich Wiedemann - for his doctoral dissertation, which was submitted in His findings were reported in several articles.

From Wikipedia, the free encyclopedia. Biuret [1] Allophanamide [2] Carbamylurea [2] Allophanic acid amide [2] Allophanimidic acid [2] N -Carbamoylaminomethanamide [ citation needed ] Ureidoformamide [2] Imidodicarbonic diamide [ citation needed ] Diurea [ citation needed ]. CAS Number. Interactive image. Beilstein Reference. Gmelin Reference. PubChem CID.

Chemical formula. Heat capacity C. Std molar entropy S o GHS hazard statements. GHS precautionary statements. Cambridge: The Royal Society of Chemistry. Ullmann's Encyclopedia of Industrial Chemistry. Weinheim: Wiley-VCH. Hughes, H. Yakel, H. Freeman Acta Crystallogr. Publication AN Journal of Animal Science. A Review". Annalen der Physik. Zersetzungsprodukt des Harnstoffs" [Biuret: decomposition product of urea].

Justus Liebig's Annalen der Chemie. Categories : Ureas Functional groups. Namespaces Article Talk. Views Read Edit View history. By using this site, you agree to the Terms of Use and Privacy Policy.

Other names Biuret [1] Allophanamide [2] Carbamylurea [2] Allophanic acid amide [2] Allophanimidic acid [2] N -Carbamoylaminomethanamide [ citation needed ] Ureidoformamide [2] Imidodicarbonic diamide [ citation needed ] Diurea [ citation needed ].

EC Number. GHS Signal word. H , H , H

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Voluntary exercise or amphetamine treatment, but not the combination, increases hippocampal brain-derived neurotrophic factor and synapsin I following cortical contusion injury in rats. The metastasis-associated protein SA4 exists in several charged variants suggesting the presence of posttranslational modifications. The Bradford method for protein quantitation. Semenogelins in the human cuantoficacion J Am Soc Nephrol.

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