Results 1 to 10 of about 1,178,940 (411)
A High Efficiency Aluminum-Ion Battery Using an AlCl3-Urea Ionic Liquid Analogue Electrolyte [PDF]
Proceedings of the National Academy of Sciences of the United States of America, 2016 In recent years, impressive advances in harvesting renewable energy have led to pressing demand for the complimentary energy storage technology. Here, a high coulombic efficiency (~ 99.7%) Al battery is developed using earth-abundant aluminum as the anode, graphite as the cathode, and a cheap ionic liquid analogue electrolyte made from a mixture of ...
Angell, Michael +6 more
arxiv +5 more sources
Urea-induced denaturation of PreQ1-riboswitch [PDF]
J. Am. Chem. Soc. 2013, 2013 Urea, a polar molecule with a large dipole moment, not only destabilizes the folded RNA structures, but can also enhance the folding rates of large ribozymes. Unlike the mechanism of urea-induced unfolding of proteins, which is well understood, the action of urea on RNA has barely been explored.
Hyeon, Changbong +2 more
arxiv +4 more sources
Molecular cloning using in vivo DNA assembly [PDF]
, 2023 Here we describe the in vivo DNA assembly approach, where molecular cloning procedures are performed using an E. coli recA-independent recombination pathway, which assembles linear fragments of DNA with short homologous termini.
Arroyo-Urea, Sandra +2 more
core +1 more source
N-Sulfinylpyrrolidine-containing ureas and thioureas as bifunctional organocatalysts
Beilstein Journal of Organic Chemistry, 2021 The synthesis of bifunctional N-sulfinylureas and thioureas with an appended pyrrolidine unit is presented. These organocatalysts were evaluated in Michael additions of aldehydes to nitroalkenes both under solvent-free conditions and in solution.
Viera Poláčková +5 more
doaj +1 more source
Frontiers in Energy Research, 2021 This study presents a novel method to improve the electrochemical performance of porous carbons (PCs) by simply adjusting the elemental composition of their precursors with nitrogen-rich materials as additives.
Ming Li +5 more
doaj +1 more source
Anion Binding Studies of Urea and Thiourea Functionalized Molecular Clefts
Frontiers in Chemistry, 2021 Two rationally designed 4-nitrophenyl-based molecular clefts functionalized with thiourea (L1) and urea (L2) have been synthesized and studied for a variety of anions by UV-Vis and colorimetric techniques in DMSO. Results from the binding studies suggest
Utsab Manna +4 more
doaj +1 more source
Synthesis of urea on the surface of interstellar water ice clusters. A quantum chemical study [PDF]
, 2023 Urea is a prebiotic molecule that has been detected in few sources of the interstellar medium (ISM) and in Murchison meteorite. Being stable against ultraviolet radiation and high-energy electron bombardment, urea is expected to be present in interstellar ices. Theoretical and experimental studies suggest that isocyanic acid (HNCO) and formamide (NH$_2$
arxiv +1 more source
Islamic stock markets and potential diversification benefits
Borsa Istanbul Review, 2015 The aim of this paper is to investigate whether the dynamic integration across a large set of developed and emerging Islamic stock markets allows potential diversification benefits in tranquil and turmoil periods.
Mouna Boujelbène Abbes +1 more
doaj +1 more source
The Impact of Teachers’ Communication Styles on Pupils’ Self- safety Throughout the Learning Process [PDF]
, 2013 Over the last decade, numerous research studies have revealed the multiple roles a teacher must implement: trainer, communicator, developer and shaper of students’ personalities, counsellor, and provider of secure learning environments for students, etc.
Urea, Roxana
core +1 more source
Reduction of nitrogen oxides by injection of urea in the freeboard of a pilot scale fluidized bed combustor [PDF]
, 1989 The ‘thermal deNOx’ process using urea has been investigated in a 1 MW fluidized bed combustor. NOx reductions of up to 76% were obtainable by using this method. The experimental results show that urea is at least as active as NH3, which is commonly used
Bramer, Eduard A. +2 more
core +3 more sources