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biuret

[ bahy-yuh-ret, bahy-yuh-ret ]

noun

, Chemistry.
  1. a white crystalline substance, C 2 H 5 O 2 N 3 ⋅H 2 O, soluble in water and alcohol, used for the identification of urea, from which it is formed on heating.


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Word History and Origins

Origin of biuret1

< German Biuret (1847); bi- 1, urea, -uret
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Example Sentences

Inasmuch as most natural proteins contain several such groups, the biuret reaction is a very general test for proteins.

Amongst these is the biuret reaction: a pink colour obtained by adding a trace of copper sulphate and an excess of caustic soda.

On now testing a portion of the clear filtrate for peptone by the biuret test, not a trace of a reaction could be obtained.

The absence of a biuret reaction would point in that direction and the question must await further study.

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