Results 31 to 40 of about 2,239,305 (281)
Early contingentnegative variation of the EEG and attentional flexibility are reduced in hypotension [PDF]
, 2002 This study explored the question as to whether hypotension is related to decreased attentional performance and reduced cortical activation. A total of 50 females aged 19 44 years participated in the study. Attentional performance was assessed using three
Duschek, Stefan +4 more
core +1 more source
Microwave-assisted Synthesis of Acridine-1,8(2H,5H)-diones via a One-pot, Three Component Reaction [PDF]
Iranian Journal of Chemistry & Chemical Engineering, 2017 A new and improved protocol for the synthesis, in good to excellent yields, of acridine-1,8(2H,5H)-diones is described, involving a one-pot, three component reaction of dimedone, arylglyoxals, and ammonium acetate in water under microwave irradiation.
Ahmad Poursattar Marjani +3 more
doaj
Molecules, 2018 In an attempt to find the neonicotinoid insecticides, twenty novel dihydropyridine derivatives were designed, “green” synthesized via one pot facile three-component reaction and evaluated for their bioactivities against Tetranychus ...
Guan-Zhou Yang +7 more
doaj +1 more source
, 2014 We investigate the dynamics of a single breathing localized structure in a three-component reaction-diffusion system subjected to the time-delayed feedback.
Gurevich, Svetlana V.
core +1 more source
Study of relativistic bound state wave functions in quasielastic (e,e'p) reactions [PDF]
, 1998 The unpolarized response functions of the quasielastic $^{16}O(e,e^\prime p)^{15}N$ reaction are calculated for three different types of relativistic bound state wave functions.
Boersma +33 more
core +2 more sources
Cyanoacetamide MCR (III): Three-Component Gewald Reactions Revisited [PDF]
Journal of Combinatorial Chemistry, 2009 Cyanoacetic acid derivatives are the starting materials for a plethora of multicomponent reaction (MCR) scaffolds. Here we describe valuable general protocols for the synthesis of arrays of 2-aminothiophene-3-carboxamides from cyanoacetamides, aldehydes or ketones, and sulfur via a Gewald-3CR variation.
Kan, Wang +2 more
openaire +2 more sources
EXTRACT OF BARBERRY AS ENTIRELY GREEN CATALYST FOR THE SYNTHESIS OF STRUCTURALLY DIVERSE 3,4,5-SUBSTITUTED FURAN-2(5H)-ONES [PDF]
Chemistry Journal of Moldova: General, Industrial and Ecological Chemistry, 2016 An eco-friendly and environmentally benign synthesis of 3,4,5-substituted furan-2(5H)-ones employing Iranian seedless barberry, known as Zereshk, (Berberis integerrima “Bidaneh”, Berberidaceae) as a biocatalyst, was developed.
Nourallah Hazeri +4 more
doaj +1 more source
Hf(OTf)4-Catalyzed Three-Component Synthesis of N-Carbamate-Protected β-Amino Ketones
Molecules, 2022 Hafnium(IV) triflate (Hf(OTf)4) has been identified as a potent catalyst for the direct three-component synthesis of β-carbamate ketones. This new method, featuring a low catalyst loading, fast reaction rate, and solvent-free conditions, provided facile ...
Zhen-Zhen Chen +5 more
doaj +1 more source
A Novel Indium-Catalyzed Three-Component Reaction: General and Efficient One-Pot Synthesis of Substituted Pyrroles [PDF]
, 2011 A convenient and general approach towards the synthesis of substituted pyrroles from propargylic acetates, silyl enol ethers, and primary amines was described. This novel transformation was catalyzed by indium trichloride in a one-pot synthesis, and high
Hao, Lu +4 more
core +1 more source
Fast reaction limit of a three-component reaction–diffusion system
Journal of Mathematical Analysis and Applications, 2011 The authors consider a three-component reaction-diffusion system with a reaction rate parameter, and investigate its singular limit as the reaction rate tends to infinity. The limit problem is given by a free boundary problem, which possesses three regions separated by the free boundaries.
Murakawa, H., Ninomiya, H.
openaire +1 more source