Results 61 to 70 of about 171,105 (301)

Proton Binding of Halloysite Nanotubes at Varied Ionic Strength: A Potentiometric Titration and Electrophoretic Mobility Study

Colloids and Interfaces
Proton binding (i.e., charging) isotherms of halloysite nanotubes (HNT) were determined from cycled acid-base potentiometric titrations in KCl solution at constant ionic strengths (0.01, 0.10, 1.00 mol dm−3). The isotherms measured in the pH cycle from 3
Bojana Katana, Duško Čakara
doaj   +1 more source

Solvent effects on glyphosate deprotonation: DFT theoretical studies

Chemical Physics Impact, 2023
To better understand the molecular structures of glyphosate in different solvents, we have studied several possible conformations, and their relative abundances, of glyphosate and its deprotonated forms, in acetone, acetonitrile, DMSO, water, ethanol ...
Alberto G. Albesa, María Estefanía Farías Hermosilla   +1 more
doaj   +1 more source

Ocean acidification affects marine chemical communication by changing structure and function of peptide signalling molecules [PDF]

, 2016
Ocean acidification is a global challenge that faces marine organisms in the near future with a predicted rapid drop in pH of up to 0.4 units by the end of this century.
Adamo, Bode, Bopp, Briffa, Brown, Browne, Clements, Compton, Crothers, Darnell, Decho, Dodd, Fabry, Forward, Grimme, Grimme, Halgren, Hall-Spencer, Hardege, Hardege, Hay, Hayden, Haye, Hehre, Henry, Hunter, Jensen, Jensen, Jensen, Kim, Klamt, Kratt, Kutzelnigg, Leduc, Lemly, Lide, Lodewyk, McDonald, McNeil, Munday, Munday, Neese, Neese, Nilsson, O'Boyle, Perdew, Pettis, Piotto, Po, Pörtner, R Core Team, Reinsel, Reisert, Rittschof, Rittschof, Rittschof, Rittschof, Sklenář, Steiger, Tegtmeyer, Tierney, Vries, Weigend, Wishart, Wittmann, Wyatt, Wyatt, Wyatt, Zimmer, Zimmer-Faust   +69 more
core   +1 more source

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

FEBS 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, Carl P. O. Helmer, Shani Zev, Ronja Driller, Emily Buhr, Markus Reinbold, Renana Schwartz, Gabriel Foley, Mikael Boden, Daniel Garbe, Gerhard Schenk, Dan Thomas Major, Bernhard Loll, Thomas Brück   +13 more
wiley   +1 more source

Gold(III) Complexes with 18-Crown-6, 1-Aza-18-Crown-6, and Cryptands 22 and 222: Stability and Structure

Inorganics
The growing demand for gold in various high-technology applications necessitates the development of efficient and selective methods for its recovery and analysis, which can be achieved using such macrocyclic ligands as crown esters and their aza ...
Daniil N. Yarullin, Olga I. Logacheva, Viktor V. Aleksandriiskii, Maksim N. Zavalishin, George A. Gamov   +4 more
doaj   +1 more source

Simulation of weak polyelectrolytes: A comparison between the constant pH and the reaction ensemble method

, 2017
The reaction ensemble and the constant pH method are well-known chemical equilibrium approaches to simulate protonation and deprotonation reactions in classical molecular dynamics and Monte Carlo simulations.
Holm, Christian, Landsgesell, Jonas, Smiatek, Jens   +2 more
core   +1 more source

pH‐mediated activation of the lysosomal arginine sensor SLC38A9

FEBS Letters, EarlyView.
Cells monitor nutrient levels via the lysosomal transporter SLC38A9 to activate the mechanistic target of rapamycin complex 1 (mTORC1). This study reveals that SLC38A9 function is regulated by pH. We identified histidine 544 as a critical pH sensor that undergoes conformational changes to control amino acid efflux from lysosomes; therefore, it ...
Xuelang Mu, Ampon Sae Her, Tamir Gonen
wiley   +1 more source

Protonation of apolar species: From Cl2H+ to (E)-NCCHCHCNH+ through computational investigations

Frontiers in Astronomy and Space Sciences, 2023
Radioastronomy is a powerful tool for the discovery of molecules in space but it requires molecular species to be polar. The observation of apolar species can be however enabled by protonation, which occurs from reaction with the abundant H3+ ion ...
Silvia Alessandrini, Luca Bizzocchi, Mattia Melosso, Cristina Puzzarini   +3 more
doaj   +1 more source

FA-SIFT study of the reactions of H₃O⁺∙(H₂O)n (n=0, 1, 2), NO⁺ and O₂˙⁺ with the terpenoid aldehydes citral, citronellal and myrtenal and their alcohol analogues [PDF]

, 2015
A
Amelynck, Crist, Bultinck, Patrick, Mees, Bernd, Schoon, N   +3 more
core   +2 more sources

dUTPase is essential in zebrafish development and possesses several single‐nucleotide variants with pronounced structural and functional consequences

FEBS Open Bio, EarlyView.
dUTPases are involved in balancing the appropriate nucleotide pools. We showed that dUTPase is essential for normal development in zebrafish. The different zebrafish genomes contain several single‐nucleotide variations (SNPs) of the dut gene. One of the dUTPase variants displayed drastically lower protein stability and catalytic efficiency as compared ...
Viktória Perey‐Simon, Angéla Békesi, Latifa Kazzazy, Jázmin Mihály, Máté Varga, Beáta G. Vértessy, Kinga Nyíri   +6 more
wiley   +1 more source