From what type of food is urea made

Any condition which impairs the elimination of urea by the kidneys can lead to uremia , a buildup of urea and other nitrogen wastes in the blood that can be fatal. To reverse the condition, either the cause of the kidney failure must be removed, or the patient must undergo blood-dialysis to remove the wastes from the blood. Urea has quite an interesting history. It was first discovered and isolated from human urine by H.

Rouelle in , and was then successfully synthesised in by Friedrich Wohler. The synthesis was almost an accident, as Wohler had been trying to make another compound, ammonium cyanate , to continue a study of cyanates he had been working on for the previous few years. When he added silver cyanate to ammonium chloride solution he obtained a white crystalline material, which proved identical to urea obtained from urine.

This discovery was very important, as this made urea the first organic compound to be synthesised from wholly inorganic starting materials. Wohler wrote triumphantly to Berzelius:. Ammonium cyanate is urea.

This discovery dealt a severe blow to a widespread belief at the time called "vitalism". Although urea is naturally produced in humans and animals, synthetic urea is manufactured with anhydrous ammonia.

Although urea often offers gardeners the most nitrogen for the lowest price on the market, special steps must be taken when applying urea to the soil to prevent the loss of nitrogen through a chemical reaction. Urea is made when carbon dioxide is reacted with anhydrous ammonia. This process happens under intense pressure, at degrees Fahrenheit. Urea is processed to take the form of granules or solid globules known as prills. Dry urea is very soluble and must be kept away from moisture until its use.

When urea is placed on the surface of the soil, a chemical reaction takes place that changes the urea to ammonium bicarbonate. The ammonium will convert into a gas, which is then lost if not protected. This means that urea should be mixed in with the soil for maximum effectiveness. A fertilizer is any substance that is added to soil or water to assist the growth of plants.

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