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urea    音标拼音: [jɚ'iə]
n. 尿素

尿素

urea
n 1: the chief solid component of mammalian urine; synthesized
from ammonia and carbon dioxide and used as fertilizer and
in animal feed and in plastics [synonym: {urea}, {carbamide}]

Urea \U"re*a\, a. [NL. See {Urine}.] (Physiol. Chem.)
A very soluble crystalline body which is the chief
constituent of the urine in mammals and some other animals.
It is also present in small quantity in blood, serous fluids,
lymph, the liver, etc.
[1913 Webster]

Note: It is the main product of the regressive metamorphosis
(katabolism) of proteid matter in the body, and is
excreted daily to the amount of about 500 grains by a
man of average weight. Chemically it is carbamide,
{CO(NH2)2}, and when heated with strong acids or
alkalies is decomposed into carbonic acid and ammonia.
It unites with acids to form salts, as nitrate of urea,
and it can be made synthetically from ammonium cyanate,
with which it is isomeric.
[1913 Webster]

{Urea ferment}, a soluble ferment formed by certain bacteria,
which, however, yield the ferment from the body of their
cells only after they have been killed by alcohol. It
causes urea to take up water and decompose into carbonic
acid and ammonia. Many different bacteria possess this
property, especially {Bacterium ureae} and {Micrococcus
ureae}, which are found abundantly in urines undergoing
alkaline fermentation.
[1913 Webster]


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  • Urea | Definition, Formula, Production, Uses, Facts | Britannica
    Urea is the chief nitrogenous end product of the metabolic breakdown of proteins in all mammals and some fishes The material occurs not only in the urine of all mammals but also in their blood, bile, milk, and perspiration
  • Urea | NH2CONH2 | CID 1176 - PubChem
    Urea is a carbonyl group with two C-bound amine groups The commercially available fertilizer has an analysis of 46-0-0 (N-P2O5-K2O) It has a role as a flour treatment agent, a human metabolite, a Daphnia magna metabolite, a Saccharomyces cerevisiae metabolite, an Escherichia coli metabolite, a mouse metabolite and a fertilizer
  • What Is Urea Made Of? How Is Urea Produced? - Science ABC
    Urea is a relatively non-toxic organic compound that aids in the breakdown of nitrogen-containing compounds and potentially toxic metabolic byproducts Urea is produced in the liver through the Urea Cycle, which occurs in both the mitochondria and cytoplasm of liver cells
  • Urea Test: High Low Levels + Normal Range - SelfHacked
    Urea tests can help measure kidney health, liver health, and protein turnover What do the results indicate, and how do doctors use them?
  • The Urea Cycle - 230nsc1. phy-astr. gsu. edu
    The Urea Cycle
  • What is: Urea - Understanding Its Role and Importance
    Urea is a nitrogen-containing compound that is produced in the liver as a byproduct of protein metabolism It is a colorless, odorless solid that is highly soluble in water Urea plays a crucial role in the body's nitrogen balance and is an essential component of urine, helping to eliminate excess nitrogen from the body
  • Urea - Simple English Wikipedia, the free encyclopedia
    Urea is an organic compound It was first found in urine in 1773 by the French chemist Jean Rouelle It is also called Carbamide, and its chemical names are Carbonyl Diamide (used in inorganic chemistry) and Diaminomethanal (used in organic chemistry) In humans, it is a normal component of blood and many body tissues
  • Urea (CH₄N₂O) – Definition, Structure, Preparation, Properties, Uses . . .
    Urea is a fascinating molecular compound that plays a crucial role in both nature and various industries As a fundamental concept in chemistry, urea is known for being the main nitrogen-containing substance in the urine of mammals It’s not just a waste product, though!





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