... is basic. As such it is protonated readily. It is also a Lewis base forming complexes of the type [M(urea)6]n+. Urea ... The blood urea nitrogen (BUN) test is a measure of the amount of nitrogen in the blood that comes from urea. It is used as a ... Urea has also been studied as a diuretic. It was first used by Dr. W. Friedrich in 1892. In a 2010 study of ICU patients, urea ... The urea molecule is planar. In solid urea, the oxygen center is engaged in two N-H-O hydrogen bonds. The resulting dense and ...

Urea is a cheap source of nitrogen, in comparison with other sources, and adding urea to the molasses blocks will reduce the ... Urea-molasses multinutrient blocks may be used as a source of nitrogen and energy for animals. Urea is a nitrogen-based ... Molasses, urea and other components are used for producing molasses/urea feeds (blocks, pastes or licks). These preparations ... With regard to the observed results, the use of urea molasses mineral blocks and medicated urea molasses mineral blocks is ...

... is often used in drip irrigation to clean pipe systems. The phosphoric acid and urea molecules in the urea ... Urea phosphate is a 1:1 combination of urea and phosphoric acid that is used as a fertilizer. It has an NPK formula 17-44-0, ... Urea phosphate is available in fertilizer vendor bags that carry a UP signet on the packaging. It is sometimes added to blends ... The acidity of urea phosphate allows Ca, Mg and P to co-exist in solution. Under less acidic conditions, there would be ...

... is a sheet-shaped crystallite with good chemical stability and strong hygroscopicity. It has usage as an ... The compound is synthesized by gradual addition of urea into a perchloric acid solution: CO(NH2)2 + HClO4 → CO(NH2)2·HClO4 An ... alternative route is addition of urea to hydrochloric acid solution, followed by addition of sodium perchlorate, and filtration ...

... at Cycling Archives José Urea at ProCyclingStats v t e (CS1 maint: bot: original URL status unknown, Articles with ... José Urea (born 6 July 1967) is a Spanish former racing cyclist. He rode in the 1990 Tour de France as well as two editions of ... 1989 1st Stage 11 Volta a Portugal 3rd Overall Volta ao Alentejo 1999 2nd Overall Vuelta a Navarra "José Urea". Cycling ...

... acts as a formaldehyde releaser. Some people have a contact allergy to imidazolidinyl urea causing ... Such people are often also allergic to diazolidinyl urea. Imidazolidinyl urea was poorly characterized until recently and the ... "Characterization and chemistry of imidazolidinyl urea and diazolidinyl urea". Contact Dermatitis. 54 (1): 50-58. doi:10.1111/j. ... Imidazolidinyl urea is an antimicrobial preservative used in cosmetics[citation needed]. It is chemically related to ...

Deng, Shuduan; Li, Xianghong; Xie, Xiaoguang (2014). "Hydroxymethyl urea and 1,3-bis(hydroxymethyl) urea as corrosion ... Methylol urea is the organic compound with the formula H2NC(O)NHCH2OH. It is a white, water-soluble solid that decomposes near ... As such it is an intermediate in the formation of urea-formaldehyde resins as well as fertilizer compositions such as methylene ... 110 °C. Methylolurea is the product of the condensation reaction of formaldehyde and urea. ...

A urea transporter is a membrane transport protein, transporting urea. Humans and other mammals have two types of urea ... Urea transporter 3 transports urea into the interstitium of the Inner Medullary Collecting Duct. Urea transporter 4 has been ... It reabsorbs up to 70% of the original filtered load of urea. Urea Transporter 2 transports urea across the apical membrane ... Urea transport in the kidney is regulated by vasopressin. The structure of a urea transport family protein from Desulfovibrio ...

Polymer-coated urea, also called plastic-coated urea, or PCU, fertilizers can permit a more precise rate of nitrogen release ... Coated urea fertilizers are a group of controlled release fertilizers consisting of prills of urea coated in less-soluble ... The coatings release the urea either when penetrated by water, as with sulfur, or when broken down, as with polymers. Urea is ... The primary disadvantage of polymer-coated urea products is their relatively high cost compared to sulfur-coated urea. Products ...

In enzymology, a urea carboxylase (EC 6.3.4.6) is an enzyme that catalyzes the chemical reaction ATP + urea + HCO3- ⇌ {\ ... The systematic name of this enzyme class is urea:carbon-dioxide ligase (ADP-forming). This enzyme participates in urea cycle ... urea, and HCO3-, whereas its 3 products are ADP, phosphate, and urea-1-carboxylate (allophanate). This enzyme belongs to the ... cite book}}: ,journal= ignored (help) Roon RJ, Levenberg B (1972). "Urea amidolyase. I. Properties of the enzyme from Candida ...

... is an antimicrobial preservative used in cosmetics. It is chemically related to imidazolidinyl urea which is ... Diazolidinyl urea is found in the commercially available preservative Germaben. Commercial diazolidinyl urea is a mixture of ... rather than on the urea nitrogen atom: Some people have a contact allergy to imidazolidinyl urea causing dermatitis. Such ... "Characterization and chemistry of imidazolidinyl urea and diazolidinyl urea". Contact Dermatitis. 54 (1): 50-58. doi:10.1111/j. ...

... is produced in one step by reaction of urea with nitric acid. This is an exothermic reaction, so steps must be ... Urea nitrate explosions may be initiated using a blasting cap. Urea contains a carbonyl group. The more electronegative oxygen ... As such, the urea cation can be thought of as a amidinium species. Paired with the spectator nitrate counteranion, it forms ... Media related to Urea nitrate at Wikimedia Commons v t e (Articles without EBI source, Articles without KEGG source, Articles ...

The urea cycle (also known as the ornithine cycle) is a cycle of biochemical reactions that produces urea (NH2)2CO from ammonia ... The urea cycle converts highly toxic ammonia to urea for excretion. This cycle was the first metabolic cycle to be discovered ( ... 1](p.734) The urea cycle and the citric acid cycle are independent cycles but are linked. One of the nitrogen atoms in the urea ... As stated above many vertebrates use the urea cycle to create urea out of ammonium so that the ammonium does not damage the ...

Urea formaldehyde (Plastics Historical Society) History of urea-formaldehyde: Chapter 1 of: Carl Meyer, Urea-Formaldehyde ... Urea-formaldehyde (UF), also known as urea-methanal, so named for its common synthesis pathway and overall structure, is a ... Early stages in the reaction of formaldehyde and urea produce bis(hydroxymethyl)urea. About 20 million metric tons of UF are ... Process for the production of condensation products from formaldehyde and urea or thiourea or other urea derivatives), Austrian ...

Movement of large amounts of urea across cell membranes is made possible by urea transporter proteins. Urea allows the kidneys ... Renal urea handling is the part of renal physiology that deals with the reabsorption and secretion of urea. ... About 40% of the urea filtered is normally found in the final urine, since there is more reabsorption than secretion along the ...

Urea works in part by loosening dried skin. Preparations generally contain 5 to 50% urea. Urea containing creams have been used ... Urea in low doses is a humectant while at high doses (above 20%) it causes breakdown of protein in the skin. Urea dissolves the ... Urea, also known as carbamide-containing cream,[clarification needed] is used as a medication and applied to the skin to treat ... "Urea topical medical facts from Drugs.com". www.drugs.com. Archived from the original on 18 January 2017. Retrieved 15 January ...

Urea that is coated with neem tree seed oil is called neem-coated urea. In January 2015, the urea manufacturers were mandated ... Neem-Coated Urea is a fertilizer and an agriculture scheme supported by the Government of India to boost the growth of wheat ... The patent for Neem Coated Urea is owned by Aditya Birla Nuvo Ltd and it's assignees are the Aditya Birla Nuvo Ltd. & Aditya ... Benefits of Neem Coated Urea include; Increase of Crop-specific yields by 15-30% on average along with higher levels of soil ...

Where 60 represents MW of urea and 14*2 MW of urea nitrogen. Kt/V Standardized Kt/V Urea reduction ratio Urine urea nitrogen ... Blood urea nitrogen (BUN) is a medical test that measures the amount of urea nitrogen found in blood. The liver produces urea ... To convert from mg/dL of blood urea nitrogen to mmol/L of urea: U r e a m m o l / L = B U N m m o l / L = B U N m g / d L ∗ 10 ... Note that molar concentrations of urea and urea nitrogen are equal, because both nitrogen gas and urea has two nitrogen atoms. ...

Upre is the pre-dialysis urea level Upost is the post-dialysis urea level Whereas the URR is formally defined as the urea ... Kt/V, like the URR, focuses on urea as the target solute, and is based on the assumption that removal of urea is from a single ... In a simplified model of urea removal from a fixed volume with no urea generation, K ⋅ t V {\displaystyle {\frac {K\cdot t}{V ... The URR is designed to measure the amount of dialysis given when the dialysis clearance of urea greatly exceeds the urea ...

... is a protein that in humans is encoded by the SLC14A1 gene. The SLC14A1 codes for a urea transporter (UTB) ... Olives B, Mattei MG, Huet M, Neau P, Martial S, Cartron JP, Bailly P (Aug 1995). "Kidd blood group and urea transport function ... 1999). "At physiological expression levels the Kidd blood group/urea transporter protein is not a water channel". J. Biol. Chem ... 2002). "Novel alleles at the JK blood group locus explain the absence of the erythrocyte urea transporter in European families ...

... is a protein that in humans is encoded by the SLC14A2 gene. In mammalian cells, urea is the chief end- ... In mammals, two urea transporters have been identified: the renal tubular urea transporter, UT2 (UT-A), and the erythrocyte ... 2003). "Expression of urea transporters in potassium-depleted mouse kidney". Am. J. Physiol. Renal Physiol. 285 (6): F1210-24. ... 2001). "97- and 117-kDa forms of collecting duct urea transporter UT-A1 are due to different states of glycosylation". Am. J. ...

"Dimethylol ethylene urea". "Dimethylol ethylene urea , C5H10N2O3 , ChemSpider". GB patent 1024384, "Method of inhibiting the ... Many DMEU-related cyclic urea derivatives used to synthesize urea-formaldehyde resins also have applications in treating paper ... Dimethylol ethylene urea (DMEU) bonds with the hydroxyl groups present in long cellulose chains and prevents the formation ... Ethylene urea, sodium hydroxide, and paraformaldehyde are often dissolved in methanol during the synthesis of DMEU. Before the ...

It is based upon the ability of H. pylori to convert urea to ammonia and carbon dioxide. Urea breath tests are recommended in ... The urea breath test is a rapid diagnostic procedure used to identify infections by Helicobacter pylori, a spiral bacterium ... Patients swallow urea labelled with an uncommon isotope, either radioactive carbon-14 (nowadays preferred in many countries) or ... The difference between the pre- and post urea measurements is used to determine infection. This value is compared to a cut-off ...

Urine urea nitrogen (UUN) refers to a test that measures the urine urea to assess nitrogen balance. Urea nitrogen is the end ... Blood urea nitrogen Gerber GS, Brendler CB. Evaluation of the urologic patient: history, physical examination, and urinalysis. ... In individuals with normal kidney and liver functions, urea is excreted via urine. By testing for UUN, clinicians can assess ...

... (also called Hyperol, artizone, urea hydrogen peroxide, and UHP) is a white crystalline solid chemical ... urea precipitates in the form of small platelets. Akin to water of crystallization, hydrogen peroxide cocrystallizes with urea ... Hydrogen peroxide - urea is mainly used as a disinfecting and bleaching agent in cosmetics and pharmaceuticals. As a drug, this ... Urea - hydrogen peroxide was also found to be an insensitive high explosive, capable of detonation by strong impulse under ...

The polyurethane urea elastomer (PUU), or poly(urethane urea) elastomer, is a flexible polymeric material that is composed of ... Hsieh, Alex; Orlicki, Joshua; Beyer, Rick (March 2009). "Molecular Design of Novel Poly(urethane-urea) Hybrids as Helmet Pads ... Hsieh, Alex; Sarva, Sai; Rice, Norman (September 2009). "Improved Dynamic Strain Hardening in Poly(Urethane Urea) Elastomers ... the short-chain diamines react with the diisocyanates to form the hard segments that are held together with urea linkages. The ...

The obtained n-paraffins have a purity of about 99%. Losses of urea are small, the hot urea solution can be returned directly ... The necessary quantity of urea for the formation of inclusion compounds varies from about 1 to 0.8 mole of urea per methyl- and ... In general, the reaction proceeds according to the scheme: urea + adduct component -> urea adduct The equilibrium of the ... In addition to urea also thiourea is used in the process. In addition to the n-alkanes are also unbranched fatty acids with ...

It forms upon treatment of urea with an excess of formaldehyde. C. Nitschke; G. Scherr (2012). "Urea Derivatives". Ullmann's ... Bis(hydroxymethyl)urea is an organic compound with the formula OC(NHCH2OH)2. This white water-soluble solid is an intermediate ... in the formation of urea-formaldehyde resins. ...

One study has shown complete hydrolysis of urea within two days of application on such soils. In acidic soils (pH 5.2) the urea ... More urease results in greater hydrolysis of urea and ammonia volatilization, particularly if urea fails to move into the soil ... Urease inhibitors prevent the urease enzyme from breaking down the urea. This increases the probability that urea will be ... For plants to absorb nitrogen from urea it must first be broken down: ( N H 2 ) 2 C O + H 2 O → u r e a s e N H 3 + H 2 N C O O ...

BUN only reflects the nitrogen content of urea (MW 28) and urea measurement reflects the whole of the molecule (MW 60), urea is ... urea secretion contributes to the intratubular concentration of urea. The subsequent buildup of urea in the inner medulla is ... The BUN, then, is roughly one-half (7/15 or 0.466) of the blood urea.[citation needed] The normal range of urea nitrogen in ... In Europe, the whole urea molecule is assayed, whereas in the United States only the nitrogen component of urea (the blood or ...