• Hydrogen peroxide - urea (also called Hyperol, artizone, urea hydrogen peroxide, and UHP) is a white crystalline solid chemical compound composed of equal amounts of hydrogen peroxide and urea. (wikipedia.org)
  • When applied for extended periods at high concentrations, oxidizing agents such as hydrogen peroxide and urea peroxide(carbamide) have proven effective for removing extrinsic and intrinsic stains as well as for brightening the overall shade and color of teeth. (ada.org)
  • These organic pillars contain unsatisfied urea oxygen lone pairs that can be used to drive the absorption of alcohols including trifluoroethanol, phenol, pentafluorophenol, and ethylene glycol to give well-ordered host:guest complexes with repeatable stoichiometry. (unair.ac.id)
  • The driving force for reversible solid transitions appears to be the formation of hydrogen bonds between the guest and an unsatisfied hydrogen bond acceptor, which is a lone pair of the urea oxygen. (unair.ac.id)
  • Background Hydrogen/oxygen therapy contribute to ameliorate dyspnea and disease progression in patients with respiratory diseases. (researchgate.net)
  • Therefore, we hypothesized that hydrogen/oxygen therapy for ordinary coronavirus disease 2019 (COVID-19) patients might reduce the length of hospitalization and increase hospital discharge rates. (researchgate.net)
  • After assigned in 1:2 ratios by PSM, 33 patients received hydrogen/oxygen therapy and 55 patients received oxygen therapy included in this study. (researchgate.net)
  • The nitrogen combines with other elements, such as carbon, hydrogen and oxygen, to form urea, which is a chemical waste product. (mayoclinic.org)
  • The gelation occurs in the formation of intra- and intermolecular associations, where hemiacetal oxygen, hydroxyl and/or methyl groups of the sugar residues of the polysaccharides contribute hydrogen bonding and/or van der Waals interactions in aqueous solutions. (scirp.org)
  • The fuel cell combines hydrogen with oxygen from the air in a nearly emission-free process that creates electricity. (motorauthority.com)
  • The original home-bleaching protocol proposed by Haywood and Heyman1 used 10 percent carbamide peroxide, which contains the equivalent of 3 percent hydrogen peroxide (water and oxygen) and 7 percent urea (ammonia and carbon dioxide). (dentistryiq.com)
  • Hydrogen bonds between the carbonyl oxygen and the amido hydrogen four a.a. upstream, toward the C-Terminus of the helix, stabilize the helical structure. (flashcardmachine.com)
  • the carbonyl oxygen and the amido hydrogen of the peptide bond lie in the plane of the Beta structure. (flashcardmachine.com)
  • Among all solid nitrogen fertilizers, urea contains the most nitrogen (46.7%) [ 16 ] and it is hydrolyzed to ammonia and carbon dioxide in the soil. (hindawi.com)
  • Urea is produced industrially by the reaction of ammonia and carbon dioxide at high pressures (13 to 30 MPa) and high temperatures (170 to 200°C) [ 18 ]. (hindawi.com)
  • Often called carbamide peroxide in dentistry, it is used as a source of hydrogen peroxide when dissolved in water for bleaching, disinfection and oxidation. (wikipedia.org)
  • Methyltrioxorhenium (MTO) catalyzes an oxidation of methyl trimethylsilyl ketene acetals with urea hydrogen peroxide to afford α-hydroxy and α-siloxy esters. (organic-chemistry.org)
  • The use of urea-hydrogen peroxide and phthalic anhydride in ethyl acetate enables a metal-free, environmentally benign oxidation of substituted sulfides to their corresponding sulfones without observation of the possible sulfoxide oxidation product. (organic-chemistry.org)
  • The use of urea-hydrogen peroxide as terminal oxidant in the presence of diphenyl diselenide as catalyst enables a highly selective catalytic oxidation of sulfides into the corresponding sulfoxides. (organic-chemistry.org)
  • Ni(OH) 2 serves as a urea oxidation catalyst. (rsc.org)
  • Urea oxidation was achieved under a small external bias or even at zero bias. (rsc.org)
  • Urea is a waste product that is excreted by the kidneys when you urinate. (healthline.com)
  • A common blood test, the blood urea nitrogen (BUN) test reveals important information about how well your kidneys are working. (mayoclinic.org)
  • The urea travels from your liver to your kidneys through your bloodstream. (mayoclinic.org)
  • Healthy kidneys filter urea and remove other waste products from your blood. (mayoclinic.org)
  • A BUN test can reveal whether your urea nitrogen levels are higher than normal, suggesting that your kidneys may not be working properly. (mayoclinic.org)
  • Loss of tubular function prevents the kidneys from excreting hydrogen cations (H+) and thereby causes metabolic acidosis. (medscape.com)
  • Its principal products include anhydrous ammonia, granular urea, urea ammonium nitrate, and ammonium nitrate products. (yahoo.com)
  • Urea and ammonium nitrate are fertilizers, and police photographed stacks of seeds from Martha Stewart Living. (boingboing.net)
  • These safety environments are necessary for dealing with exhaust containing high concentrations of moisture and unburned hydrogen. (horiba.com)
  • We also offer measurement technologies to accurately measure various components in exhaust gas containing high concentrations of moisture and unburned hydrogen. (horiba.com)
  • We provide support for measures to deal with exhaust containing high concentrations of moisture and unburned hydrogen. (horiba.com)
  • The active ingredient for both in-office and home bleaching is the same, hydrogen peroxide, with differing concentrations and application times. (dentistryiq.com)
  • The following parameters were evaluated: buffering capacity, flow rate, pH, and concentrations of calcium, urea and total proteins. (bvsalud.org)
  • If kidney problems are the main concern, the creatinine levels in your blood will likely also be measured when your blood is tested for urea nitrogen levels. (mayoclinic.org)
  • He underwent fluid resuscitation and investigations showed the following results: serum sodium 128 mmol/L, chloride 76 mmol/L, potassium 3.3 mmol/L, bicarbonate 28 mmol/L, anion gap 15.6 mmol/L, urea 35 mg/dL, creatinine 1.3 mg/dL, calcium 10.5 mg/dL, phosphorus 7.6mg/dL and magnesium 2.3 mg/dL. (who.int)
  • Hydrogen peroxide-urea is a readily water-soluble, odorless, crystalline solid, which is available as white powder or colorless needles or platelets. (wikipedia.org)
  • Urea-hydrogen peroxide is a non-toxic, odorless crystalline solid. (organic-chemistry.org)
  • A one-dimensional crystalline solid built from pillars of self-assembled bis-urea pyridyl macrocycles affords a close packed structure with no pores. (unair.ac.id)
  • Hence, in this study, two methods of CO 2 recovery from combustion gases and CO 2 recycling in ammonia units will be used to increase urea production to realize low-carbon and industrial systems (including green agriculture). (hindawi.com)
  • Hydrogen internal combustion engines (ICE) are gaining traction as an attractive pathway for decarbonization of the mobility sector and achieve carbon neutrality. (horiba.com)
  • China needs to vigorously develop hydrogen energy to become carbon neutral by 2060, Zhou added. (chinadaily.com.cn)
  • These tridentate hydrogen bond donors are highly effective phase-transfer catalysts for solubilizing safe and inexpensive metal alkali fluorides (KF and CsF) in organic solvents for enantioselective nucleophilic fluorinations. (ox.ac.uk)
  • So just like hydrogen peroxide, the (erroneously) so-called adduct is an oxidizer but the release at room temperature in the presence of catalysts proceeds in a controlled manner. (wikipedia.org)
  • This adduct, which contains 35% of H 2 O 2 , sets the hydrogen peroxide free during its application. (organic-chemistry.org)
  • Eco-friendly laboratory procedures allow the oxidative iodination of various activated and deactivated arenes with molecular iodine, in the presence of UHP (percarbamide), a stable, strongly H-bonded, solid urea-hydrogen peroxide adduct as the oxidant. (organic-chemistry.org)
  • Urea-hydrogen peroxide adduct (UHP) is stable, inexpensive and an easily handled reagent. (organic-chemistry.org)
  • Sarcosine oxidase converts sarcosine to glycine and hydrogen peroxide, and the hydrogen peroxide reacts with a chromophore in the presence of peroxidase to produce a colored product that is measured at 546 nm (secondary wavelength = 700 nm). (cdc.gov)
  • The term hyperchloremic acidosis (ie, RTA) refers to a diverse group of tubular disorders, uncoupled from glomerular damage, characterized by impairment of urinary acidification without urea and anion retention. (medscape.com)
  • Under light illumination, photoexcited holes generated at the metal oxide electrode oxidize urea, while photoexcited electrons reduce water to produce hydrogen gas at the Pt counter electrode. (rsc.org)
  • Agriculture can benefit from urea fertilizer because it contains a lot of nitrogen at a reasonable cost. (hindawi.com)
  • Urea fertilizer can be stored easily and does not pose a fire hazard over time. (hindawi.com)
  • Due to its acidifying properties, urea fertilizer is an ideal fertilizer for many plants. (hindawi.com)
  • Globally, about 200 million tons of urea fertilizer are produced each year [ 11 , 12 ]. (hindawi.com)
  • Since urea can be combined with other solid fertilizers, this fertilizer has become the most widely used fertilizer in the world [ 13 - 15 ]. (hindawi.com)
  • Since urea is highly soluble in water, it is also very suitable for use in fertilizer solutions [ 17 ]. (hindawi.com)
  • Urea fertilizer has been produced since the early 1950s. (hindawi.com)
  • Urea is hugely valuable as fertilizer. (thecrunchychicken.com)
  • CF Industries Holdings, Inc. manufactures and sells hydrogen and nitrogen products for energy, fertilizer, emissions abatement, and other industrial activities worldwide. (yahoo.com)
  • Stabilizing α-Helicity of a Polypeptide in Aqueous Urea: Dipole Orientation or Hydrogen Bonding? (mpg.de)
  • Polypeptide chain folds to prevent "fraying at the ends" to provide appropriate hydrogen bonding partners for the end groups. (flashcardmachine.com)
  • In the denatured state, both water and urea rotation is much more retarded than for a fully solvated polypeptide. (lu.se)
  • Inter- and intramolecular hydrogen-bonding interactions exhibit various supramolecular architectures in the crystal packing and crystal cohesion is achieved by N-H⋯N, N-H⋯O and C-H⋯H-C interactions. (iucr.org)
  • The intramolecular associations, (hydrogen bonding and van der Waals forces of attraction), of S-198 gum molecules in aqueous solutions were proposed. (scirp.org)
  • 2018). Large Hydrogen-Bond Mismatch between TMAO and Urea Promotes Their Hydrophobic Association. (mpg.de)
  • Benefit of hydrogen ICE, is that it can utilize common parts, know-how, and development facilities of traditional gasoline and diesel engines. (horiba.com)
  • Further, hydrogen ICE can divert and utilize conventional gasoline and diesel engine parts, development environments, and common skill sets for internal combustion engines. (horiba.com)
  • Within PACCAR, Engine Development is the center of competence for heavy duty diesel and hydrogen engine and aftertreatment systems. (yacht.nl)
  • However, they do emit harmful nitrogen oxides that need to be treated using urea-based selective catalytic reduction like in modern diesel engines. (motorauthority.com)
  • The short side-chains of rice, potato and wheat amylopectin molecules may participate in the intermolecular hydrogen bonding with amylose molecules. (scirp.org)
  • He and coworkers established that oral malodor (bad breath) is associated with the presence of volatile sulfur compounds, primarily hydrogen sulfide and methylmercaptan. (medscape.com)
  • The results of this study revealed that there were no statistically significant differences in salivary flow, pH, buffering capacity, urea, calcium and total proteins in the subjects studied. (bvsalud.org)
  • Multigram synthesis of N-alkyl bis-ureas for asymmetric hydrogen bonding phase-transfer catalysis. (ox.ac.uk)
  • Herein, we report a protocol for the multigram synthesis of two representative enantiopure N-alkyl bis-urea organocatalysts derived from (S)-(-)-1,1'-binaphthyl-2,2'-diamine ((S)-BINAM). (ox.ac.uk)
  • The first catalyst, characterized by N-isopropyl substitution, was obtained by using a two-step sequence consisting of reductive amination followed by urea coupling from commercially available starting materials (14 g, 48% yield and 5-d total synthesis time). (ox.ac.uk)
  • A cyclic urea unit in the P(2) position of ABT-378 is novel and makes two bidentate hydrogen bonds with Asp 29 of HIV-1 protease. (rcsb.org)
  • stabilized by hydrogen bonds between the carbonyl oxygens and amid hydrogens of the peptide bond. (flashcardmachine.com)
  • Urea has been considered as a potential hydrogen source, while the conventional methods to extract hydrogen from urea are typically energy intensive processes. (rsc.org)
  • abstract = "Artikel ini membahas tentang korelasi antara Urin 8-Iso-Prostaglandin F2{\^I}± dan Hidrogen Peroksida terhadap fungsi ginjal pada pasien T2DM mengkonsumsi Sulfonyl-urea dan kombinasi Metformin-Sulfonylurea. (ui.ac.id)
  • A large number of fertilizers especially nitrogen fertilizers like urea (NH 2 CONH 2 ) are needed to have a modern society as well as a green industry [ 3 ]. (hindawi.com)
  • Agricultural products need nitrogen during critical growth stages, which is usually provided by conventional urea fertilizers [ 9 , 10 ]. (hindawi.com)
  • Often, urea is used in multicomponent formulations of solid fertilizers. (hindawi.com)
  • Then is added urea or sodium sulphate or glucose or maltose or sometimes any one of the commonly available fertilizers after dissolving in hot water. (thehindu.com)
  • Although pure hydrogen peroxide penetrates the tooth more readily than carbamide peroxide, it is inherently unstable and dangerous to the patient when allowed to contact soft tissues. (dentistryiq.com)
  • The move is in accordance with President Moon Jae-in and his Cheong Wa Dae economic team's ambitious drive to promote hydrogen fuel cell systems as part of efforts to find new growth engines other than legacy products such as conventional cars, ships and steel. (koreatimes.co.kr)
  • On the whole, development of hydrogen ICE will require a response to some challenges that are different from those of conventional internal combustion engines. (horiba.com)
  • It contains solid and water-free hydrogen peroxide, which offers a higher stability and better controllability than liquid hydrogen peroxide when used as an oxidizing agent. (wikipedia.org)
  • Akin to water of crystallization, hydrogen peroxide cocrystallizes with urea with the stoichiometry of 1:1. (wikipedia.org)
  • And, apparently, converting pee to hydrogen takes only 3% of the energy than converting water does. (thecrunchychicken.com)
  • Therapeutic hydrogen has been applied by different delivery methods including straightforward inhalation, drinking hydrogen dissolved in water and injection with hydrogen-saturated saline. (researchgate.net)
  • The converted hydrogen is then pushed through a water filter for purification and then passed through a cylinder of liquid borax which is used to remove all the moisture. (haznos.org)
  • However, Botte did see the process as a potential way to make wastewater treatment a more self-sustaining and energy-efficient in that the urea being extracted from the water can be used to power the extraction process itself. (haznos.org)
  • MRD is among the few methods that can provide molecular-level informa- tion about protein solvation in native as well as denatured states, and it is used here to simultaneously monitor the interactions of urea and water with the unfolding protein. (lu.se)
  • 1 nsec) interactions of urea and water with the native and denatured protein. (lu.se)
  • A delicate balance between preferential interaction, hydrogen bonding and dipole-dipole interactions determines polyalanine α-helix (un)folding in aqueous urea. (mpg.de)
  • If this is the case, interactions, but it is not clear whether denaturants like urea then solvent denaturation can be driven simply by the ex- act directly by binding to the protein surface or indirectly by posure of more binding sites in the denatured protein perturbing solvent-mediated hydrophobic interactions or by (Schellman 1987). (lu.se)
  • If it's not recycled to plants, then somebody somewhere is going to take natural gas- and use it to manufacture- more urea. (thecrunchychicken.com)
  • In recent years, molecular hydrogen treatment has the potential to preventive and therapeutic applications against many diseases due to its extensive effects, such as antioxidant, anti-inflammatory, antiapoptotic [16, 17]. (researchgate.net)
  • More importantly, the small molecular properties of hydrogen enable it can rapidly reaches the alveoli, suggest a unique advantage for lung disease [18]. (researchgate.net)
  • 1995), the molecular mechanism and the peptide group, suggesting that urea-peptide inter- whereby urea unfolds proteins has not been established. (lu.se)
  • Loss of glomerular function (associated with decreased glomerular filtration rate [GRF]) results in the retention of many end products of metabolism, including the anions of various organic and inorganic acids and urea. (medscape.com)
  • HORIBA Automotive supports customers by quickly getting information on regulatory requirements for hydrogen ICE emission test methods. (horiba.com)
  • Recent basic and clinical research has revealed that hydrogen is an important physiological regulatory factor with antioxidant, anti-inflammatory and anti-apoptotic protective effects on cells and organs. (researchgate.net)
  • Neutron Diffraction Study of the 1:1 Urea:Hydrogen Peroxide complex at 81 K". Acta Crystallographica Section B. 37 (5): 1086. (wikipedia.org)
  • 17O and 2H magnetic relaxation dispersion (MRD) to study urea-induced denaturation of intestinal fatty acid-binding protein (I-FABP). (lu.se)
  • Then, the purified hydrogen gas is pushed into a generator, which produces electricity. (haznos.org)
  • Urea-hydrogen peroxide in the presence of a catalytic amount of magnesium bromide efficiently oxidizes primary and secondary benzylic alcohols into the corresponding aromatic aldehydes and ketones. (organic-chemistry.org)
  • This review summarizes currently available data regarding the protective role of hydrogen, provides an outline of recent advances in research on the use of hydrogen as a therapeutic medical gas in diverse models of disease and discusses the feasibility of hydrogen as a therapeutic strategy. (researchgate.net)
  • Pee power is based on hydrogen, the most common element in the universe but one that has resisted efforts to produce, store, transport and use economically. (thecrunchychicken.com)
  • The most common VSCs, such as methylmercaptan and hydrogen sulfite, can be detected using organoleptic and objective methods to identify and localize the source. (medscape.com)
  • The most common VSCs, such as methylmercaptan and hydrogen sulfite, can be detected by using organoleptic and objective methods, which can identify and localize the source. (medscape.com)