Urea - Wikipedia
Urea's high aqueous solubility reflects its ability to engage in extensive hydrogen bonding with water. By virtue of its tendency to form porous frameworks, urea has the ability to trap many organic compounds.
Diesel exhaust fluid - Wikipedia
Diesel exhaust fluid (DEF; also known as AUS 32 and marketed as AdBlue[ 3 ]) is a liquid used to reduce the amount of air pollution created by a diesel engine. Specifically, DEF is an aqueous urea solution made with 32.5% urea and 67.5% deionized water.
What is Aus 40 (Urea 40%)? - Azure Chemical
2022年4月25日 · What is Aus 40 (Urea 40%)? Aqueous urea solution 40 or AUS 40 is the other type of DEF usually used for ships. It reduces Nitrogen Oxide (NOx) emissions from vessels and sometimes from the other diesel engine exhaust systems. Marine Urea is injected into the diesel engine exhaust systems and reacts with nitrogen oxide gas emissions.
Molecular Dynamics Simulation of Aqueous Urea Solution: Is Urea …
2014年9月26日 · An aqueous solution of urea is a very important mixture of biological relevance because of the definitive role of urea as protein denaturant at high concentrations. There has been an extended debate over the years on urea’s influence on the structure of water.
Structure and thermodynamics of aqueous urea solutions from …
2019年9月3日 · Experimental densities of urea solutions are determined up to 5 kbar. A new nonpolarizable force field for urea in aqueous solutions is developed. Molecular simulations based on classical force fields are a powerful method for shedding light on the complex behavior of biomolecules in solution.
Urea | NH2CONH2 | CID 1176 - PubChem
Urea is a carbonyl group with two C-bound amine groups. The commercially available fertilizer has an analysis of 46-0-0 (N-P2O5-K2O). It has a role as a flour treatment agent, a human metabolite, a Daphnia magna metabolite, a Saccharomyces cerevisiae metabolite, an Escherichia coli metabolite, a mouse metabolite and a fertilizer.
Heat of Solution, Heat Capacity, and Density of Aqueous Urea …
Structure and thermodynamics of aqueous urea solutions from ambient to kilobar pressures: From thermodynamic modeling, experiments, and first principles simulations to an accurate force field description.
Thermodynamic properties of aqueous salt containing urea solutions ...
2012年7月15日 · Ternary aqueous urea solutions containing NaCl, KCl, NaBr, KBr, LiBr, NaNO 3, and LiNO 3 at two different concentrations of urea (0.3 and 1 molal) as well as at three salt concentrations (0.25, 0.5, and 0.75 molal) were considered. Moreover, urea solubility was also measured at 310.15 K in 3 and 5 molal NaCl solutions in the present work.
Volumetric and Thermodynamic Studies on Urea–Water System
2024年3月17日 · Urea, as a nonelectrolyte molecular solute in aqueous solutions, has a vital role in the thermodynamic, thermophysical and physiochemical studies. To a large extent, addition of Urea to water does not alter the structural dynamics of water.
[PDF] Aqueous urea solutions: structure, energetics, and urea ...
To study the structure and energetics of aqueous urea solutions, we have carried out molecular dynamics simulations for a wide range of urea concentrations and temperatures. The hydrogen bonds between urea and water were found to be significantly weaker than those between water molecules, which drives urea self-aggregation due to the ...