Results 111 to 120 of about 47,813 (302)
Leaching of gold from a mechanically and mechanochemically activated waste [PDF]
Acta Montanistica Slovaca, 2010 The intensification of leaching of gold from a waste using mechanical activation (milling in water) and mechanochemical activation(milling in thiourea solution) were studied as the pretreatment steps.
Jana Ficeriová, Peter Baláž
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European Journal of Organic Chemistry, EarlyView.The allenyl ketone products of an enol ether formation–propargyl Claisen rearrangement sequence are susceptible to acid‐catalyzed isomerization to yield the corresponding conjugated dienones. A diaryl thiourea catalyst was found to promote the desired reaction sequence while suppressing the competing isomerization.
Veera K. Bruce‐Salmenkivi +3 more
wiley +1 more source
Synthesis and characterization of thiourea
, 2019 Herein, a simple and effective method for the preparation of thiourea using a nucleophilic substitution reaction is reported. Urea and Lawesson’s reagent were used as the raw materials to prepare thiourea via a one-step method involving the sulfuration ...
Zou, Haifeng +7 more
core +1 more source
Synthesis of Benzopyran Atropisomers via Electrophilic Halogenation
European Journal of Organic Chemistry, EarlyView.We report a halogenation‐based method for the synthesis of axially chiral benzopyrans, tolerating diverse substituents and halogens (Br, Cl, and I). A double bromination gives bisbenzopyrans with two stereogenic axes. Preliminary enantioselective conditions yield benzopyran atropisomer with up to 56% ee.
Alix Bourhis +3 more
wiley +1 more source
MoleculesPyridyl-thiourea complexes of formula [(Cym)MCl(κ2Npy,S-H2NNS)][SbF6] (Cym = η6-p-MeC6H4iPr; H2NNS = N-(p-tolyl)-N′-(2-pyridylmethyl)thiourea); M = Ru (1), Os (2)) were synthesized by reacting the corresponding metal dimers [{(Cym)MCl}2(μ-Cl)2] with ...
Alejandro Grasa +4 more
doaj +1 more source
Mechanistic Understanding of Nickel Catalyzed Urea Oxidation Reaction to Cyanate and Nitrite
Exploration, EarlyView.The urea oxidation reaction (UOR) is a promising alternative to oxygen evolution reaction (OER) for energy efficient hydrogen production, yet its reaction mechanism remains controversial because many proposed pathways have not been directly correlated with experimentally verified products and intermediates.
Kyu In Shim +4 more
wiley +1 more source
, 1927 The Kinetics of the Intramolecular Transformation of Ammonium Thiocyanate to Thiourea and Thiourea to Ammonium ...
A. N. KAPPANNA
core +1 more source
Hydrogel Adhesives for Gastrointestinal Perforation: Design Principles and Applications
Exploration, EarlyView.There are few reviews on hydrogel adhesives that comprehensively highlight the design principles, factors affecting adhesion, and applications for gastrointestinal (GI) perforation repair. This review outlines the mainstream design approaches of hydrogel adhesives via covalent and noncovalent molecular interactions, illustrating the underlying adhesive
Yudi Pang +7 more
wiley +1 more source
Journal of Applied Toxicology, EarlyView.ABSTRACT Mancozeb (MZ) is a widely used dithiocarbamate fungicide composed of manganese (Mn) and zinc (Zn) complexes. Increasing concern has been raised regarding its occupational and human health relevance, particularly due to its neurotoxic potential associated with Mn‐related cellular dysfunction.
Lavínia Lazzarotti +5 more
wiley +1 more source
Eucalypt coppices behavior under application of plant growth regulators [PDF]
Communications in Plant Sciences, 2013 This study aimed to evaluate the influence of TDZ; calciocianamide, and thiourea in the emission and development of eucalyptus shoots. The study was conducted in clonal sprouts of an Eucalyptus urophylla x E.
Ângela Simone Freitag Lima +3 more
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