Results 251 to 260 of about 673,091 (300)
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2014
Urea is generated by the urea cycle enzymes, which are mainly in the liver but are also ubiquitously expressed at low levels in other tissues. The metabolic process is altered in several conditions such as by diets, hormones, and diseases. Urea is then eliminated through fluids, especially urine.
Hongkai, Wang, Jianhua, Ran, Tao, Jiang
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Urea is generated by the urea cycle enzymes, which are mainly in the liver but are also ubiquitously expressed at low levels in other tissues. The metabolic process is altered in several conditions such as by diets, hormones, and diseases. Urea is then eliminated through fluids, especially urine.
Hongkai, Wang, Jianhua, Ran, Tao, Jiang
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Recent Advances in the Electro-Oxidation of Urea for Direct Urea Fuel Cell and Urea Electrolysis
Topics in Current Chemistry, 2018This paper provides an overview of recent advances in urea electro-oxidation. Urea sources are abundant from human urine, urea-containing wastewater, and industrial urea, thus becoming an attractive option as anodic fuel for the application in direct urea fuel cells (DUFCs).
Guoxiong Wang, Dianxue Cao, Ke Ye
exaly +3 more sources
Nature, 1948
CONSIDERABLE evidence1 has been presented for the polar structures I and II as important contributory forms of urea in aqueous solution and in the solid state. This view has been criticized by Bell, Gillespie and Taylor2 on the grounds of electrometric titration data.
J O, HARRIS, A H, ROBSON
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CONSIDERABLE evidence1 has been presented for the polar structures I and II as important contributory forms of urea in aqueous solution and in the solid state. This view has been criticized by Bell, Gillespie and Taylor2 on the grounds of electrometric titration data.
J O, HARRIS, A H, ROBSON
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Characterization and chemistry of imidazolidinyl urea and diazolidinyl urea
Contact Dermatitis, 2006For several decades, the cosmetic preservatives imidazolidinyl urea (IU) and diazolidinyl urea (DU) have not only been poorly characterized but have also had misleading chemical structures assigned to them. The most common trade names of IU and DU are Germall 115 and Germall II, respectively.
Lehmann, Søren Vig +4 more
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Urea Reduction Ratio Considering Urea Rebound
Nephron, 1998An American National Study shows that survival benefits from higher dialysis doses appear to be present up to a Kt/V level of 1.3 or a urea reduction ratio (URR) of 70%. The effect of increasing dialysis efficiency magnified urea rebound and the error in URR determinations.
F, Maduell +8 more
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Digital Urea Meter for Impedeometric Urea Sensor
2019 IEEE International Instrumentation and Measurement Technology Conference (I2MTC), 2019This paper presents, an electronic interface to measure the concentration of urea in aqueous solution. The interface uses a simple, cost effective, two electrode type impedeometric urea sensor already reported by the author. This paper discusses, measurement technique and range changing algorithm.
Asmita Bose, Karabi Biswas
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Seminars in Neurology, 2014
The urea cycle is the primary nitrogen-disposal pathway in humans. It requires the coordinated function of six enzymes and two mitochondrial transporters to catalyze the conversion of a molecule of ammonia, the α-nitrogen of aspartate, and bicarbonate into urea.
Helman, Guy +2 more
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The urea cycle is the primary nitrogen-disposal pathway in humans. It requires the coordinated function of six enzymes and two mitochondrial transporters to catalyze the conversion of a molecule of ammonia, the α-nitrogen of aspartate, and bicarbonate into urea.
Helman, Guy +2 more
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Urea Quality Sensor Integration in Urea Supply Line / Urea Tank
SAE Technical Paper Series, 2012<div class="section abstract"><div class="htmlview paragraph">Selective catalytic reduction (SCR) is a promising technology for diesel after treatment. SCR can be used to meet Euro IV and even stringent emission standards. Dosing of urea must be controlled to lower NOx emission and NH3 slip simultaneously.
Sachin Kadu, Harish gangwar
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Normal vibrations of urea and urea-d4
Spectrochimica Acta, 1957Abstract Infra-red absorption spectra of urea and urea- d 4 have been measured. Infra-red dichroic measurement and Raman measurement have been made for urea in the crystalline state. The normal vibrations of the planar C 2 v model have been calculated as an eight-body problem and the assignment of the observed frequencies has been made.
A. Yamaguchi +3 more
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[Urea and urea combinations in ichthyoses].
Der Hautarzt; Zeitschrift fur Dermatologie, Venerologie, und verwandte Gebiete, 1989The author recommends differentiated topical treatment of ichthyoses. At present, urea is the base curative for the five main types of this heterogenous group of diseases. Urea is not only effective as a keratolytic agent, but also in its ability to bind water.
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