Results 11 to 20 of about 26,663 (244)

Anion Exchange Mechanism of PFAS with Cholestyramine: Implications for PFAS Removal from the Human Body [PDF]

Toxics
Per- and polyfluoroalkyl substances (PFAS) can bioaccumulate and may increase the risk of cancer development. Clinical studies report that cholestyramine treatment lowers serum PFAS concentrations, but the molecular energetics, interactions and ...
Ronan Zwa, Sahith Mada, Sivanesan Dakshanamurthy   +2 more
doaj   +2 more sources

Analysis of capivasertib via ion-pairing with erythrocin B as a spectrofluorometric probe [PDF]

Scientific Reports
A novel, eco-friendly spectrofluorimetric method has been developed for the sensitive determination of capivasertib, based on resonance Rayleigh scattering enhancement.
Hesham Salem, Hytham Raafat, Alyaa Alaa, Belal M. Abdelghany, Anas Mahmoud, Abdelrahman Medhat, Omar Saied, Michael Amir, Amany Abdelaziz   +8 more
doaj   +2 more sources

Superalkali–Alkalide Interactions and Ion Pairing in Low-Polarity Solvents [PDF]

Journal of the American Chemical Society, 2021
The nature of anionic alkali metals in solution is traditionally thought to be "gaslike" and unperturbed. In contrast to this noninteracting picture, we present experimental and computational data herein that support ion pairing in alkalide solutions.
René Riedel, Andrew G. Seel, Daniel Malko, Daniel P. Miller, Brendan T. Sperling, Heungjae Choi, Thomas F. Headen, Eva Zurek, Adrian Porch, Anthony Kucernak, Nicholas C. Pyper, Peter P. Edwards, Anthony G. M. Barrett   +12 more
openaire   +5 more sources

The energetics of ion-pair and hydrogen-bonding interactions in a helical peptide [PDF]

Biochemistry, 1993
A single pair of Glu and Lys residues has been placed at four different spacings, and in both orientations, in an otherwise neutral alanine-glutamine peptide helix, and the contribution to helix stability of the different Glu-Lys interactions has been measured.
Scholtz, J. Martin, Qian, Hong, Robbins, Virginia H., Baldwin, Robert L.   +3 more
openaire   +3 more sources

Ion Pair−π Interactions

Journal of the American Chemical Society, 2015
We report that anion-π and cation-π interactions can occur on the same aromatic surface. Interactions of this type are referred to as ion pair-π interactions. Their existence, nature, and significance are elaborated in the context of spectral tuning, ion binding in solution, and activation of cell-penetrating peptides.
Fujisawa Kaori, Humbert-Droz Marie, Letrun Romain, Vauthey Eric, Wesolowski Tomasz A., Sakai Naomi, Matile Stefan   +6 more
openaire   +4 more sources

Preconcentration of copper from natural water samples using ligand-less in situ surfactant-based solid phase extraction prior to FAAS determination

Química Nova, 2014
In the present work, a simple and rapid ligand-less, in situ, surfactant-based solid phase extraction for the preconcentration of copper in water samples was developed.
Sayed Zia Mohammadi, Daryoush Afzali, Fatemeh Sabermahani, Samira Afshari   +3 more
doaj   +1 more source

IDPM: an online database for ion distribution in protein molecules

BMC Bioinformatics, 2018
Background Interactions between ions and proteins have been extensively studied, yet most of the studies focus on the ion binding site. The binding mechanism for many ion binding sites can be clearly described from high resolution structures.
Xilun Xiang, Haiguang Liu
doaj   +1 more source

Collective Interactions in Ion Pairs

Journal of Computational Chemistry
ABSTRACT Collective interactions represent a recently proposed bonding mode in which stabilization arises not from a localized two‐center bond but from the distributed exchange–correlation effects between a central site and several surrounding atoms, whereas the interaction between the central atom and the metal ...
Jorge Gonzalo, Julen Munárriz, Angel Martín Pendás, Jorge Echeverría   +3 more
openaire   +4 more sources

Implications of the differing roles of the β1 and β3 transmembrane and cytoplasmic domains for integrin function

eLife, 2016
Integrins are transmembrane receptors composed of α and β subunits. Although most integrins contain β1, canonical activation mechanisms are based on studies of the platelet integrin, αIIbβ3.
Zhenwei Lu, Sijo Mathew, Jiang Chen, Arina Hadziselimovic, Riya Palamuttam, Billy G Hudson, Reinhard Fässler, Ambra Pozzi, Charles R Sanders, Roy Zent   +9 more
doaj   +1 more source

Cooperative Noncovalent Interactions Induce Ion Pair Separation in Diphenylsilanides

Chemistry – A European Journal, 2017
AbstractThis crystallographic and computational study describes an unusual potassium silanide structure. A contact ion pair is expected in the solid state between potassium and silicon, yet the potassium cation binds an aromatic ring and the anionic silanide interacts with CH bonds on neighboring crown ether molecules. These structure‐bonding phenomena
Eric A. Marro, Eric M. Press, Tapas K. Purkait, Daniel Jimenez, Maxime A. Siegler, Rebekka S. Klausen   +5 more
openaire   +3 more sources