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Urea or carbamide is an organic compound with the chemical formula (N H2)2C O. The molecule has two amine (-NH2) residues joined by a carbonyl (-CO-) functional group. Urea serves an important role in the metabolism of nitrogen-containing compounds by animals and is the main nitrogen-containing substance in the urine of mammals. Being solid, colourless, odorless, neither acidic nor alkaline, highly soluble in water, and relatively non-toxic, urea is widely used in fertilizers as a convenient source of nitrogen. Urea is also an important raw material for the chemical industry. The synthesis of this organic compound by Friedrich Wöhler in 1828 from an inorganic precursor was an important milestone in the development of chemistry. The terms urea and carbamide are also used for a class of chemical compounds sharing the same functional group RR'N-CO-NRR', namely a carbonyl group attached to two organic amine residues. Example include carbamide peroxide, allantoin, and hydantoin. Ureas are closely related to biurets and related in structure to amides, carbamates, diimides, carbodiimides, and thiocarbamides. From Wikipedia under the
GNU Free Documentation License  tradenote.net 449px x 515px | 21.20kB [source page]  diariocorreo.com.ec 333px x 500px | 139.50kB [source page] Nacional de Fomento BNF desde este lunes estara atendiendo a los campesinos que deseen adquirir dicho producto y cada saco se lo estara expendiendo a razon de 10 dolares Este lunes inicia una nueva etapa de distribucion de urea subsidiada Con esto ha quedado claro que el precio no ha variado y por lo tanto el Gobierno Nacional a traves del BNF solo From Yahoo Image Search: "Urea"  sklonklish.blogspot.com Travis hu, 21 Jan 2010 11:30:00 GM urea. \yu- r - \ noun: a nitrogenous compound that is the chief solid component of mammalian urine Etymology: New Latin, from French uree TWENTY-ONE If humans convert to a photosynthetic diet, it is believed the digestive system will ...  keratosispilaris.org LandBsmama Mon, 04 Jan 2010 08:00:00 GM Hello all! I'm new to this site, so forgive me if there's a very similar thread. I have a 2.5yo who I've self diagnosed with KP (it's not very severe).  lsucd.blogspot.com Hippie's Creations Sun, 17 Jan 2010 04:40:00 GM Today was uneventful...let me just say that Lennon without his tenex during the day is more than a handful (which he did yesterday) and with tenex he is a handful. What is tenex? Well, it is a blood pressure medicine like clonodine, ... From Google Blog Search: "Urea"  news.google.com Today's Trucking News Unlike today's SCR engines -- in which urea -based diesel exhaust fluid (DEF) is meshed with the hot exhaust stream in a catalyst, forming ammonia ... and more » news.google.com CSNews Online With trucks expected to have on-board urea tanks of 15 to 30 gallons, drivers will not have to add DEF each time they refuel, though many may top off their ... news.google.com Malaysia Star It contains calcium-rich algae Protectami, said to improve the skin's smoothness; glucosamine to increase brightness and even skin tone; urea to reduce pore ... From Google News Search: "Urea" how to reduce the high pressure of liquid phase stream which consists of melamine and urea? Q. i'm doing the design of production of melamine. The liquid stream which out from reactor is 8000kpa and 400celcius.The stream consists of melamine and unreacted urea which in liquids phase. the pressure is too high. what equipments that i can used to depressurized the liquid stream? any body can give me the answer? Asked by cyin_86 - Fri Aug 22 03:39:52 2008 - - 1 Answers - 0 Comments A. First you need to cool it in a heat exchanger below about 80 celsius, otherwise it will boil. Then use adiabatic throttling to reduce the pressure to atmospheric. You will need a spring loaded pressure relief valve so as to maintain the 8000kpa pressure in the reactor. Make sure that there is plenty of surface area in the valve, or it might clog because of precipitated unreacted urea. Maybe have two pressure relief valves so that it is easy to switch to the other one for maintenance. You could also have a filter upstream of the valve to catch some of the urea crystals. Depending on how much urea is in the stream, you might need a cyclone separator. Answered by Dave D - Fri Aug 22 13:21:52 2008 How to lower for certainer level if its high ? what are the medication and diet to control creating & urea ? Q. Sir, i have 1.6 Ceeatnine & urea = 40, where as its normal level is 1.2 & 38. can any one of your life experience OR specialist can tell me, what is the medication & diet to be taken to control the level of this creatnine & urea Pl ? Asked by ill y - Thu Jan 10 23:13:19 2008 - - 2 Answers - 0 Comments A. Those numbers are a both a bit elevated, but neither by very much. You want to know why they are abnormal. And while diet may be part of the solution, you need to identify and stop the process that is causing these abnormalities If it is due to renal failure, you are probably diabetic or hypertensive (high blood pressure) and should modify calorie or salt intake. But heart failure or prostate enlargement could be to blame, in which case the recommendations would vary. The right kind of physcian to see is an internal medicine doctor. This is not an emergency, but it should not be ignored for months for no reason either. Until you know better, I would restrict salt and protein in your diet. Good luck. Answered by Yaybob - Fri Jan 11 01:27:16 2008 How long can you live with Urea Cycle Disorder?
Q. I have to do a project on this disorder and i cant find anything saying how long u live. And also, is it just new-borns that are diagnosed with this? I was looking for an age range and it just kept saying newborns. I just want to check and make sure. Asked by LaughingSweetie - Thu Jan 15 01:27:56 2009 - - 1 Answers - 0 Comments A. 12 seconds. Give or take. Answered by Leer - Thu Jan 15 01:30:47 2009 From Yahoo Answer Search: "Urea" |
