Results 91 to 100 of about 50,349 (282)
Jesu li humusne kiseline prirodne tvorevine? [PDF]
, 2006 Alkaline cleavage of soil organic matter was studied by following the changes in absorbance at 250–270 nm, but particularly using differential pulse polarography. The measurement of peak currents obtained by the latter technique allowed to follow changes
Elinore B. Rupp, Petr Zuman
core +1 more source
Electrochemical Nitrate Reduction Reaction to Ammonia at Industrial‐Level Current Densities
Advanced Science, EarlyView.This review starts from the mechanism and theoretical basis of electrochemical nitrate reduction reaction (NO3−RR), and systematically summarizes and discusses the design strategies of industrial‐level current density catalysts. In addition, the progress of industrial‐level NO3−RR‐based electrolyzers, including flow reactor and membrane electrode ...
Zhijie Cui +4 more
wiley +1 more source
Synthesis of Schiff Bases via Environmentally Benign and Energy-Efficient Greener Methodologies
E-Journal of Chemistry, 2009 Non classical methods (water based reaction, microwave and grindstone chemistry) were used for the preparation of Schiff bases from 3-chloro-4-fluoro aniline and several benzaldehydes. The key raw materials were allowed to react in water, under microwave
Arshi Naqvi +4 more
doaj +1 more source
Mechanically bonded macromolecules [PDF]
, 2010 Mechanically bonded macromolecules constitute a class of challenging synthetic targets in polymer science. The controllable intramolecular motions of mechanical bonds, in combination with the processability and useful physical and mechanical properties ...
Benítez, Diego +5 more
core +1 more source
Strategies for Paired Electrolysis with Enhanced Efficiency
Advanced Energy and Sustainability Research, EarlyView.This review summarizes the fundamentals, challenges, and strategies for paired electrolysis, with examples in the chlor‐alkali, hydrogen production, CO2 reduction, and ammonia synthesis industries. Future directions include the development of advanced membranes, computational studies, process integration, scale‐up, and techno‐economic analysis.
Yuanyuan Yao +6 more
wiley +1 more source
Oxidation of benzaldehyde in some single phase betaine-benzaldehyde-water systems
Journal of Pharmacy and Pharmacology, 1964 AbstractThe oxidation rates of increasing concentrations of benzaldehyde in ternary systems of the L1 type have been measured in aqueous solutions of four betaine homologues. On applying corrections for extra-micellar material, the rate becomes independent of the betaine concentration and is related to the micellar ratio of benzaldehyde to betaine when
J, SWARBRICK, J E, CARLESS
openaire +2 more sources
Angewandte Chemie, EarlyView.Die Implementierung von Kronenethern in den Liganden von Kobaltporphyrinen wirkt sich in mehrfacher Hinsicht positiv auf die elektrochemische CO2‐Reduktion aus: 1. Das Reduktionspotenzial wird in Gegenwart von K+ gesenkt; 2. die CO‐Erzeugung in Zero‐Gap‐Elektrolyseuren wird gesteigert und 3.
Wiebke Wiesner +7 more
wiley +1 more source
A combined experimental and theoretical study of the polar [3+2] cycloaddition of electrophilically activated carbonyl ylides with aldehydes and imines [PDF]
, 2009 International audienceNumerous 2,5-diaryl-1,3-dioxolane-4,4-dicarbonitriles and 2,4-diphenyl-1,3-oxazolidine-5,5- dicarbonitriles have been synthesized by [3+2] cycloaddition reactions between carbonyl ylides generated from epoxides, and aldehydes or ...
Bentabed-Ababsa, Ghenia +7 more
core +3 more sources
Microwave-Assisted Synthesis of Some 3,5-Arylated 2-Pyrazolines
Molecules, 2003 Condensation of 2-acetylnaphthalene with benzaldehydes under microwave irradiation affords chalcones which undergo facile and clean cyclizations with hydrazines RNHNH2 (R= H, Ph, Ac) to afford 3,5-arylated 2-pyrazolines in quantitative yields, also under
Hassan Ghasemnejad, Davood Azarifar
doaj +1 more source
Remarkable enhancement of catalytic activity of a 2 : 1 complex between a non-planar Mo(V)–porphyrin and a ruthenium-substituted Keggin-type heteropolyoxometalate in catalytic oxidation of benzyl alcohols [PDF]
, 2012 A 2 : 1 complex composed between a non-planar Mo(V)–porphyrin complex ([Mo(DPP)(O)]+, DPP2− = dodecaphenylporphyrin) and a ruthenium-substituted Keggin-type heteropolyoxometalate (Ru-POM), [SiW11O39RuIII(DMSO)]5−, acts as an efficient catalyst for ...
Fukuzumi Shunichi +6 more
core +1 more source