Results 351 to 360 of about 1,298,773 (390)
Some of the next articles are maybe not open access.
Advanced Functional Materials, 2020
Hydrogen production via water electrocatalysis is limited by the sluggish anodic oxygen evolution reaction (OER) that requires a high overpotential. In response, a urea‐assisted energy‐saving alkaline hydrogen‐production system has been investigated by ...
Chao Wang +5 more
semanticscholar +1 more source
Hydrogen production via water electrocatalysis is limited by the sluggish anodic oxygen evolution reaction (OER) that requires a high overpotential. In response, a urea‐assisted energy‐saving alkaline hydrogen‐production system has been investigated by ...
Chao Wang +5 more
semanticscholar +1 more source
Plasma urea kinetics in urea infusion
Clinical Pharmacology & Therapeutics, 1972Seven patients undergoing an infusion of 30 per cent urea‐10 per cent invert sugar solution (Urevert) for treatment of cerebral edema were studied with regard to plasma urea kinetics. The 2 compartment (extracellular and intracellular fluid spaces) model has been applied to analysis of the plasma levels.
Paul Ng +3 more
openaire +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. Harris, Robson Ah
openaire +3 more sources
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. Harris, Robson Ah
openaire +3 more sources
International Journal of Toxicology, 2023
The Expert Panel for Cosmetic Ingredient Safety reviewed updated information that has become available since their original assessment from 1980, along with updated information regarding product types, and frequency and concentrations of use, and reaffirmed their original conclusion that Imidazolidinyl Urea is safe as a cosmetic ingredient in the ...
Christina, Burnett +10 more
openaire +2 more sources
The Expert Panel for Cosmetic Ingredient Safety reviewed updated information that has become available since their original assessment from 1980, along with updated information regarding product types, and frequency and concentrations of use, and reaffirmed their original conclusion that Imidazolidinyl Urea is safe as a cosmetic ingredient in the ...
Christina, Burnett +10 more
openaire +2 more sources
Coating materials for slow release of nitrogen from urea fertilizer: a review
, 2020Presently, about 200 million tons of urea fertilizer is produced worldwide to meet supply and demand. However, a quarter of the urea applied to soils is lost to the environment due to poor efficiency.
B. Beig +5 more
semanticscholar +1 more source
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.
J. Garcia-Valdecasas +8 more
openaire +3 more sources
, 2018
Photo/electrochemical splitting of water to hydrogen (H2) fuel is a sustainable way of meeting our energy demands at no environmental cost, but significant challenges remain: for example, the sluggish anodic reaction imposes a considerable overpotential ...
Zi-You Yu +6 more
semanticscholar +1 more source
Photo/electrochemical splitting of water to hydrogen (H2) fuel is a sustainable way of meeting our energy demands at no environmental cost, but significant challenges remain: for example, the sluggish anodic reaction imposes a considerable overpotential ...
Zi-You Yu +6 more
semanticscholar +1 more source
Local Charge Distribution Engineered by Schottky Heterojunctions toward Urea Electrolysis
Advanced Energy Materials, 2018Urea electrooxidation with favorable thermodynamic potential offers great promise for decoupling H2/O2 evolution from sluggish water splitting, and simultaneously mitigating the problem of urea‐rich water pollution.
Caicai Li +8 more
semanticscholar +1 more source
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.
Akiko Yamaguchi +3 more
openaire +2 more sources
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
openaire +3 more sources