Results 61 to 70 of about 12,662 (287)

To better understand the formation of short-chain acids in combustion systems [PDF]

, 2008
International audienceOur study aims at a better control and understanding of the transfer of a complex [DNA supercoiled plasmid - dodecyltrimethylammonium surfactant] layer from a liquid-vapour water interface onto a silicon surface without any ...
Battin-Leclerc, Frédérique, Jaffrezo, J.L., Konnov, A.A., Legrand, Michel   +3 more
core   +7 more sources

Relaxant Activity of 4H-Pyran and 1,6-Dihydropyridine Derivatives on Isolated Rat Trachea

Drugs and Drug Candidates
Derivatives of 4H-pyrans and 1,6-dihydropyridines have generated considerable attention due to their interesting biological and therapeutic values. Their pharmacological activities include vasorelaxant, anticarcinogenic, antimicrobial, and antioxidant ...
Samuel Estrada-Soto, Soledad Alemán-Pantitlán, Emmanuel Gaona-Tovar, Fernando Hernández-Borja, Yolanda Alcaraz, Rafael Villalobos-Molina, Miguel A. Vázquez   +6 more
doaj   +1 more source

Green chemistry preparation of MgO grit like nanostructures: efficient catalyst for the synthesis of 4H-pyrans and α,α′-bis(substituted-benzylidene) cycloalkanone derivatives

Green Processing and Synthesis, 2016
A grit like nanostructure of MgO was prepared in a medium of mulberry leaves extract and characterized on the basis of field emission scanning electronic microscopy (FE-SEM), X-ray diffraction (XRD), and energy dispersive X-ray (EDX) analysis.
Mobinikhaledi Akbar, Yazdanipour Atisa, Ghashang Majid   +2 more
doaj   +1 more source

Abrogation of Antitumor Effects of Corynebacterium parvum and BeG by Antimacrophage Agents: Brief Communication [PDF]

, 2017
The consistently demonstrable antitumor effect of Corynebacterium parvum and BCG against a 7,12-dimethylbenz[a]anthracene-induced rat fibrosarcoma, growing either as a localized subcutaneous tumor or in ascites form, was abrogated by treatment of rats ...
Keller, R.
core  

Development of fast switching photochromic coatings on transparent plastics and glass [PDF]

, 1999
A new photochromic organic-inorganic nanocomposite (Nanomer(R)) coating system has been developed. It is based on an epoxysilane as network former, an organic bisepoxide as spacer, an organic amine as thermal cross-linker and surface modified SiO2 ...
Fries, Kira, Lindenstruth, Marion, Mennig, Martin, Schmidt, Helmut K.   +3 more
core   +2 more sources

Organocatalysis in Synthesis: L-Proline as an Enantioselective Catalyst in the Synthesis of Pyrans and Thiopyrans

Molecules, 2012
The multicomponent reaction (MCR) of aromatic aldehydes 1 and malononitrile (2) with active methylenes 5a–h in the presence of L-proline produced pyrans and thiopyrans 6a–h stereospecifically and in good yields.
Noura Saad Al-Hokbany, Noha M. Hilmy Elnagdi   +1 more
doaj   +1 more source

Consecutive reactions with sulfoximines: a direct access to 2-sulfonimidoylylidene tetrahydrofurans and 6-sulfonimidoylmethyl- 3,4-dihydro-2H-pyrans [PDF]

, 2009
International audience2-Sulfonimidoylylidene tetrahydrofurans and 2-sulfonimidoylylidene-5-vinyl tetrahydrofurans were readily synthesized via a consecutive acylation/SN2 sequence with total regio- and chemoselectivity from Johnson's sulfoximine ...
Bonne, Damien, Bressy, Cyril, Chouraqui, Gaëlle, Commeiras, Laurent, Coquerel, Yoann, Mailhol, Damien, Rodriguez, Jean, Sridharan, Vellaisamy, Virolleaud, Marie-Alice   +8 more
core   +3 more sources

Modeling Pyran Formation in the Molybdenum Cofactor: Protonation of Quinoxalyl–Dithiolene Promoting Pyran Cyclization [PDF]

Inorganic Chemistry, 2019
Mononuclear Mo and W enzymes require a unique ligand known as molybdopterin (MPT). This ligand binds the metal through a dithiolene chelate, and the dithiolene bridges a reduced pyranopterin group. Pyran scission and formation have been proposed as a reaction of the MPT ligand that may occur within the enzymes to adjust reactivity at the Mo atom.
Douglas R. Gisewhite, Alexandra L. Nagelski, Daniel C. Cummins, Glenn P. A. Yap, Sharon J. N. Burgmayer   +4 more
openaire   +2 more sources

An acido- and photochromic molecular device that mimics triode action [PDF]

, 2016
© The Royal Society of Chemistry 2016. The photo-controlled shift of pH titration curves, describing the acidochromic behaviour of a spiropyran switch network, was harnessed for the realisation of a molecular triode.
Andréasson, Joakim, Grotli, M., Li, Shiming, Pischel, U., Remón, P.   +4 more
core   +1 more source

Light‐Responsive Carbon Dots with Photochromism and Excitation‐Dependent Room Temperature Phosphorescence

Advanced Physics Research, EarlyView.
A light‐responsive system with photochromism and excitation‐dependent phosphorescence was constructed by microwave synthesis of nitrogen‐doped carbon dots(N‐CDs), which provides insights into the design and synthesis of CDs with multifunctional optical properties, promoting the application expansion of intelligent responsive materials in the fields of ...
Xiaoqi Fang, Yuan Li, Junjie Cui, Zhenye Xu, Zifei Ge, Chengwei Hu, Khurram Abbas, Hong Bi   +7 more
wiley   +1 more source