Results 51 to 60 of about 48,994 (294)

Congener-Specific Numbering Systems for the Environmentally Relevant C4 through C8 Perfluorinated Homologue Groups of Alkyl Sulfonates, Carboxylates, Telomer Alcohols and Acids, and Their Derivatives [PDF]

open access: yes, 2008
We introduce a congener-specific numbering system for the C4 through C8 perfluorinated homologue groups of alkyl sulfonates, carboxylates, telomer alcohols and acids, and their derivatives.
Kaya Forest   +3 more
core   +3 more sources

Structural Characterization of Dialkylaluminum Carboxylates:  Models for Carboxylate Alumoxanes

open access: yesOrganometallics, 1997
The reaction of Al(tBu)3 with carboxylic acids, RCO2H, yields the dimeric di-tert-butylaluminum carboxylates [(tBu)2Al(μ-O2CR)]2, where R = tBu (1), CCl3 (2), Ph (3), CH2Ph (4), CHPh2 (5), CPh3 (6)...
Charles E. Bethley   +5 more
openaire   +3 more sources

A methionine‐lined active site governs carbocation stabilization and product specificity in a bacterial terpene synthase

open access: yesFEBS Letters, EarlyView.
This study reveals a unique active site enriched in methionine residues and demonstrates that these residues play a critical role by stabilizing carbocation intermediates through novel sulfur–cation interactions. Structure‐guided mutagenesis further revealed variants with significantly altered product profiles, enhancing pseudopterosin formation. These
Marion Ringel   +13 more
wiley   +1 more source

Poly(acrylic acid)-coated iron oxide nanoparticles : quantitative evaluation of the coating properties and applications for the removal of a pollutant dye

open access: yes, 2012
In this work, 6 to 12 nm iron oxide nanoparticles were synthesized and coated with poly(acrylic acid) chains of molecular weight 2100 g/mol. Based on a quantitative evaluation of the dispersions, the bare and coated particles were thoroughly ...
Berret, J. -F.   +5 more
core   +2 more sources

Reductive defluorination of aqueous perfluorinated alkyl surfactants : effects of ionic headgroup and chain length [PDF]

open access: yes, 2009
Perfluorinated chemicals (PFCs) are distributed throughout the environment. In the case of perfluorinated alkyl carboxylates and sulfonates, they can be classified as persistent organic pollutants since they are resistant to environmentally relevant ...
Cheng, Jie   +5 more
core   +1 more source

Peroxidasin enables melanoma immune escape by inhibiting natural killer cell cytotoxicity

open access: yesMolecular Oncology, EarlyView.
Peroxidasin (PXDN) is secreted by melanoma cells and binds the NK cell receptor NKG2D, thereby suppressing NK cell activation and cytotoxicity. PXDN depletion restores NKG2D signaling and enables effective NK cell–mediated melanoma killing. These findings identify PXDN as a previously unrecognized immune evasion factor and a potential target to improve
Hsu‐Min Sung   +17 more
wiley   +1 more source

Corrosion behaviour of brazed multilayer material AA4343/AA3003/AA4343: Influence of coolant parameters [PDF]

open access: yes, 2007
This paper is the second part of a work devoted to corrosion in brazed AA4343/AA3003/AA4343 materials on the water side of automotive heater cores. In the first part of the study [S. Tierce, N.Pébère, C. Blanc, C. Casenave, G. Mankowski, H.
Blanc, Christine   +5 more
core   +4 more sources

C2α‐carbanion‐protonating glutamate discloses tradeoffs between substrate accommodation and reaction rate in actinobacterial 2‐hydroxyacyl‐CoA lyase

open access: yesFEBS Open Bio, EarlyView.
Enzymes of the 2‐hydroxyacyl‐CoA lyase group catalyze the condensation of formyl‐CoA with aldehydes or ketones. Thus, by structural adaptation of active sites, practically any pharmaceutically and industrially important 2‐hydroxyacid could be biotechnologically synthesized. Combining crystal structure analysis, active site mutations and kinetic assays,
Michael Zahn   +4 more
wiley   +1 more source

Zinc Carboxylate Surface Passivation for Enhanced Optical Properties of In(Zn)P Colloidal Quantum Dots

open access: yesMicromachines, 2022
Indium phosphide (InP) colloidal quantum dots (CQDs) have generated great interest as next-generation light-emitting materials owing to their narrow emission spectra and environment-friendly components.
Doheon Yoo   +4 more
doaj   +1 more source

Entanglement and Bell's inequality violation above room temperature in metal carboxylates

open access: yes, 2009
In the present work we show that a special family of materials, the metal carboxylates, may have entangled states up to very high temperatures. From magnetic susceptibility measurements, we have estimated the critical temperature below which entanglement
A. M. dos Santos   +9 more
core   +1 more source

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