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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 - Wikipedia
    Urea serves an important role in the cellular metabolism of nitrogen -containing compounds by animals and is the main nitrogen-containing substance in the urine of mammals Urea is Neo-Latin, from French urée, from Ancient Greek οὖρον (oûron) 'urine', itself from Proto-Indo-European *h₂worsom
  • Urea | Definition, Formula, Production, Uses, Facts | Britannica
    Urea, the diamide of carbonic acid It has important uses as a fertilizer and feed supplement, as well as a starting material for the manufacture of plastics and drugs It is a colorless, crystalline substance that melts at 132 7 degrees C (271 degrees F) and decomposes before boiling
  • 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 | NH2CONH2 | CID 1176 - PubChem
    Urea | NH2CONH2 or CH4N2O | CID 1176 - structure, chemical names, physical and chemical properties, classification, patents, literature, biological activities, safety hazards toxicity information, supplier lists, and more
  • Why Blood Urea Levels Rise (Uremia): Key Medical Causes
    High blood urea levels may signal kidney problems Explore the key medical causes of uremia, its symptoms, diagnostic tests, and treatment approaches for better kidney health
  • Urea Manufacturing Process Explained | How Urea Is Made in Industries
    Urea—also called carbamide —is a white, solid compound that’s rich in nitrogen, a key nutrient for plants It dissolves easily in water, doesn’t leave behind salty residues, and is often shaped into tiny round pellets or granules for easier use
  • Urea Cream: Brands Uses - Cleveland Clinic
    Urea cream helps soften dry, rough or thick skin as a result of eczema, psoriasis or other skin conditions It can also help with non-surgical nail removal
  • Urea | 57-13-6 - ChemicalBook
    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
  • Understanding High Urea Levels: Causes and Implications
    In humans, the breakdown of amino acids generates ammonia, a toxic compound The liver converts ammonia into urea through the urea cycle, which incorporates a series of biochemical reactions Urea is then transported through the bloodstream to the kidneys, where it is filtered and excreted in urine
  • Urea Test: High Low Levels + Normal Range - SelfHacked
    Urea is an important measure of kidney health, liver health, and protein turnover A urea blood test is often ordered as a part of a comprehensive metabolic panel, which gives a broad overview of a person’s metabolic and overall health





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