Results 81 to 90 of about 76,323 (380)

Dynamic Bonds Reinforced Polyamide Elastomer for Biomedical Orthosis

Advanced Science, EarlyView.
A dynamic bonds (DBs) reinforced shape memory polyamide elastomer is developed using reactive extrusion. Dynamic covalent networks enhance interlayer adhesion in 4D‐printed objects by utilizing the combined effects of multiple DBs, reducing mechanical anisotropy and improving the mechanical and shape memory properties.
Zhen Li, Peiyao Yan, Hao Wang, Yuancheng Zhang, Junhua Kong, Wei Zhao, Xin Li, Xiaomeng Zhang, Zhe Cui, Peng Fu, Xinchang Pang, Minying Liu, Chaobin He   +12 more
wiley   +1 more source

Carbamates as Potential Prodrugs and a New Warhead for HDAC Inhibition

Molecules, 2018
We designed and synthesized carbamates of the clinically-approved HDAC (histone deacetylase) inhibitor vorinostat (suberoylanilide hydroxamic acid, SAHA) in order to validate our previously-proposed hypothesis that these carbamates might serve as ...
Kristina King, Alexander-Thomas Hauser, Jelena Melesina, Wolfgang Sippl, Manfred Jung   +4 more
doaj   +1 more source

Sulfonyl Azides as Precursors in Ligand-Free Palladium-Catalyzed Synthesis of Sulfonyl Carbamates and Sulfonyl Ureas and Synthesis of Sulfonamides.

Journal of Organic Chemistry, 2016
An efficient synthesis of sulfonyl carbamates and sulfonyl ureas from sulfonyl azides employing a palladium-catalyzed carbonylation protocol has been developed. Using a two-chamber system, sulfonyl azides, PdCl2, and CO gas, released ex situ from Mo(CO)6,
Shiao Y Chow, Marc Y. Stevens, Luke R. Odell   +2 more
semanticscholar   +1 more source

CO2‐DBU‐Triggered Photoredox‐Catalyzed Direct α‐C‐H Alkylation of Alcohols

Advanced Science, EarlyView.
An efficient photoinduced and metal‐free method is developed for direct α‐C–H monoalkylation of alcohols utilizing the CO2‐DBU system as the hydrogen bond acceptor (HBA) in the presence of H2O, allowing for selective functionalization of alcohols with a broad substrate scope.
Zeyu Zhang, Zongchang Han, Yuhao Shang, Han‐Shi Hu, Jun Li, Chanjuan Xi   +5 more
wiley   +1 more source

Experimental hut evaluation of bednets treated with an organophosphate (chlorpyrifos-methyl) or a pyrethroid (lambdacyhalothrin) alone and in combination against insecticide-resistant Anopheles gambiae and Culex quinquefasciatus mosquitoes [PDF]

, 2005
BACKGROUND: Pyrethroid resistant mosquitoes are becoming increasingly common in parts of Africa. It is important to identify alternative insecticides which, if necessary, could be used to replace or supplement the pyrethroids for use on treated nets ...
Asidi, Alex N, Chandre, Fabrice, Corbel, Vincent, Curtis, Christopher F, Darriet, Frédéric, Hougard, Jean-Marc, Koffi, Alphonsine A, N' Guessan, Raphael, Rowland, Mark W, Zaim, Morteza   +9 more
core   +4 more sources

Photocontrolled Release of Urea Enables the Detection of Urea–Urease Intermediates by Cryo‐FTIR

Angewandte Chemie, EarlyView.
Urease is a fast enzyme, presenting kcat of the order of 103–104 s−1. To enable the visualization of its mechanism we explored the technique of cryo‐FTIR. By means of using a ruthenium complex as a caged‐urea, upon light irradiation urea was released and we could see the coordination of the urea to the active site.
Caterina G.C. Marques Netto, Sarah Bell, Caio B. Castro, Pedro Henrique Machado, Vatsal Purohit, Katherine M. Davis, Ana Paula L. Batista, R. Brian Dyer   +7 more
wiley   +2 more sources

Assessment of Organophosphate and Carbamate Pesticide Residues in Cigarette Tobacco with a Novel Cell Biosensor

Sensors, 2008
The conventional analysis of pesticide residues in analytical commodities, such as tobacco and tobacco products is a labor intensive procedure, since it is necessary to cover a wide range of different chemicals, using a single procedure.
Spiridon Kintzios, Alexandros Michaelides, Olga Mangana, Georgia Moschopoulou, Kelly Flampouri, Sophie Mavrikou   +5 more
doaj  

Innovative Design of PEI‐Modified AMO‐Layered Double Hydroxide for Efficient and Stable Direct Air Capture of CO2

Advanced Science, EarlyView.
An uncalcined, hydroxyl‐rich MgAl layered double hydroxide, synthesized via low‐energy aqueous miscible organic solvent treatment, enables mesopore‐engineered polyethyleneimine anchoring for direct air capture (DAC). The exfoliated structure exposes abundant hydroxyls that stabilize amines via hydrogen bonding, effectively suppressing oxidative ...
Meng Zhao, Liang Huang, Yanshan Gao, Ziling Wang, Xuancan Zhu, Qiang Wang, Dermot O'Hare   +6 more
wiley   +1 more source

Selective Chemo‐Divergent Hydrogenation of Ethylene Carbonate Enabled by Multi‐Functional Poly(Ionic Liquids)‐Stabilized Ru Nanoparticles

Angewandte Chemie, EarlyView.
A highly efficient and selective chemo‐divergent hydrogenation of cyclic carbonates is promoted by in situ generated poly(ionic liquid)‐stabilized ruthenium nanoparticles (Ru@PIL) catalysts. Under solvent‐free conditions, ethylene carbonate is transformed into either ethylene glycol and CH4 or EtOH and CO2, following a “direct hydrogenation” or a ...
Wenjuan Wang, Thierry Tassaing, Joan Vignolle   +2 more
wiley   +2 more sources

Engineering of Multi‐Dynamic Bonds Toward Room‐Temperature Self‐Healing Epoxy/MXene Adaptable Network with Record‐High Toughness

Advanced Science, EarlyView.
Inspired by mussel nacre and byssus, a multi‐type dynamic chemically bonded epoxy/MXene adaptable network is fabricated through a hierarchical assembly strategy, establishing the toughest (210.75 MJ m−3) room‐temperature self‐healing (90.04% recovery within 2 h at 25 °C) epoxy resin to date, challenging the limitations of conventional thermosetting ...
Xiaobo Zhu, Yu Hao, Liang‐Feng Huang, Haichao Zhao, Liping Wang   +4 more
wiley   +1 more source