The decomposition of urea nitrate (UN) was studied using adiabatic and non-isothermal calorimetry techniques. Gas species released were identified and quantified in situ using TG-infrared spectroscopy/mass spectrometry and molar proportions of these gases were evaluated. A decomposition mechanis...
Identifying urea nitrate (UN) in post-blast debris is difficult, since it readily decomposes under high temperature. The authors developed onsite, rapid, and accurate detection of UN, using p-dimethylaminocinnamaldehyde (p-DMAC) dispersed in poly(acrylamide) hydrogels. These hydrogels change col...
Direct urea fuel cell (DUFC) has caused a lot of attention in recent years because of simple availability of urea as fuel and high hydrogen storage in this compound. DUFC usually uses oxygen as the oxidant and the platinum catalysts as the cathode catalyst. In our previous research, O2 even air ...
We introduce the use of a lanthanide complex, tetracycline–europium, for the clinical diagnosis of urea hydrogen peroxide in human whole blood. The values obtained agree with the urea concentration variation verified in 49 patients, including 12 predialysis, 12 peritoneal, and 15 dialysis subje...
A novel three-dimensional (3D) porous nickel-cobalt (Ni-Co) film on nickel foam is successfully prepared and further used as an efficient anode for direct urea-hydrogen peroxide fuel cell (DUHPFC). By varying the cobalt/nickel mole ratios into 0%, 20%, 50%, 80% and 100%, the optimized Ni-Co/Ni f...
Nickel-cobalt nanowire arrays (Ni-Co NWAs) electrode is prepared by one-step galvanostatic electrodeposition with a polycarbonate membrane as the template. By adjusting the Co proportion in the Ni and Co bath solution into 10%, the optimal Ni-Co NWAs electrode in terms of relatively lower onset ...
An efficient epoxidation of chalcones with urea-hydrogen peroxide (UHP) under ultrasound irradiation was carried out in 78–93% yields. Compared with the classical method, the advantages of protocol are to use a safer oxidant, mild conditions, no toxic solvent and shorter reaction time.
Although a number of methods have been developed for the selective oxidation of sulfides to sulfoxides, the need remains for alternative efficient, reliable strategies that can be generally applied to various sulfides and that use readily available reagents under mild reaction conditions. Herein...
An efficient and practical method for the chemoselective ipso-hydroxylation of arylboronic acids is demonstrated using urea-hydrogen peroxide under catalyst free condition at room temperature. Remarkably, oxidation sensitive functional groups such as olefin, aldehyde, alcohol, ketone, and sulfid...
The highly porous electrode of a crisscrossed CoNi nanosheets array grown on reduced graphene oxide decorated Ni foam (CoNi/[email protected] foam) is fabricated through a facile dip and dry method followed by electroreduction and electrodeposition methods. The phase composition and morphology o...
A series of N-substituted acetamidines and 2-methylimidazole derivatives structurally related to W1400 were synthesized and evaluated as Nitric Oxide Synthase (NOS) inhibitors. Analogs with sterically hindering isopropyl and phenyl substituents on the benzylic carbon connecting the aromatic core...
In our previously published paper we showed how guanidonium (G+) ion causes substantial, surface-specific displacements of the H underpotential deposition (UPD) voltammetric current profiles, at Pt(1 1 1), (1 0 0), (1 1 0) and (5 1 1) stepped surfaces, to less positive potentials. This behaviour...
The effect of N-carbamoyl-2-(2,6-dichlorophenyl) acetamidine hydrochloride (LON-954) on α2-adrenoceptors was studied in in vivo and in vitro preparations. Like yohimbine, LON-954 antagonised the clonidine-induced inhibition of twitch responses in the Auerbach's plexus of guinea pig ileum a...
Treatment of internal alkynes with sodium methoxide in the presence of Pd(OAc)2 and PPh3 in methanol for 48 h gave the reduction products, alkenes or alkanes in good chemical yields. This reaction proceeds through a palladium methanolate complex, followed by β-hydride elimination and reductive ...
In this work, sodium borohydride (SB) ethanolysis was explored for the first time as a method to generate hydrogen for Polymer Exchange Membrane Fuel Cells. Ethanolysis by-product was characterized by Fourier Transform Infrared Spectroscopy, X-Ray Diffraction, and Nuclear Magnetic Resonance. Met...
Sodium containing catalysts are convenient catalysts for the pure dehydrogenation of methanol to anhydrous formaldehyde. Elemental sodium catalyses the reaction in a homogeneous vapour phase reaction at mild reaction conditions with high yields. The variation of several process parameters reveal...
Processing of crystalline pharmaceuticals often involves removal of the solvent of crystallization. Several cases are documented where removal of solvated alcohol is much faster when the sample is simply exposed to ambient humidity than when the sample is vacuum-dried. The most dramatic example ...
The effect of different type of heteropolyacid/Zr-MCM-41 catalysts on the catalytic amination of glycerol with dimethylamine to produce Dimethylamino-3-propanal was researched. Under the premise of their respective optimum loading amount, the specific surface area, pore volume and pore size of t...
In this work, graphene oxide (GO)-supported ruthenium nanomaterials ([email protected] NPs) were used as catalysts in dimethylamine borane (DMAB) dehydrogenation. Raman spectroscopy, X-ray diffraction (XRD), high-resolution transmission electron microscopy (HRTEM), transmission electron microsco...
In the present study, highly effective and reusable monodisperse ruthenium–nickel (Ru-Ni) nanomaterials supported on poly(N-vinyl-2-pyrrolidone) ([email protected]) were synthesized (3.51 ± 0.38 nm) by a facile sodium-hydroxide-assisted reduction method; Ru and Ni reduction in PVP solution was...
About|Contact|Cas|Product Name|Molecular|Country|Encyclopedia
Message|New Cas|MSDS|Service|Advertisement|CAS DataBase|Article Data|Manufacturers | Chemical Catalog
©2008 LookChem.com,License: ICP
NO.:Zhejiang16009103
complaints:service@lookchem.com Desktop View