The earliest known work on the attached plane jet was carried out by Forthmann (1934), which was described and quoted by Sigalla (1958), Schwarz and Cosart (1961), Reddy Gorla and Jeng (1971), Bajura and Catalano (1975), Rajaratnam (1976), Awbi (1991), and Imao et al.
The Test Sample. Ammonia is a waste product formed primarily by bacteria in the intestines during the digestion of protein. If not processed and cleared from the body appropriately, excess ammonia can accumulate in the blood. This test measures the amount of ammonia in the blood. Ammonia is normally transported in the blood to the liver, where it is converted into two substances called urea and glutamine. The urea is then carried to the kidneys, where it is eliminated in the urine.
When your body breaks down protein, one of the waste products is ammonia, which contains nitrogen. The nitrogen mixes with other elements in your body, including carbon, hydrogen, and oxygen, and forms urea, which is a waste product. Urea is then excreted by the kidneys when you urinate. The urine urea nitrogen test determines how much urea is in the urine to assess the amount of protein breakdown. The test can help determine how well the kidneys are functioning, and if your intake of protein is too high or low.