Results 11 to 20 of about 8,535,977 (341)

Entropy Drives Calcium Carbonate Ion Association

ChemPhysChem, 2016
AbstractThe understanding of the molecular mechanisms underlying the early stages of crystallisation is still incomplete. In the case of calcium carbonate, experimental and computational evidence suggests that phase separation relies on so‐called pre‐nucleation clusters (PNCs).
Matthias Kellermeier, Paolo Raiteri, John K. Berg, Andreas Kempter, Julian D. Gale, Denis Gebauer   +5 more
openaire   +5 more sources

Ion association in aqueous solution [PDF]

Fluid Phase Equilibria, 2016
Abstract The properties of aqueous ionic solutions are determined by strong electrostatic interactions, which are influenced by polarizability and charge transfer interactions. Potential models which include polarizability and charge transfer have been developed for water and single ion properties. Here, the ion–ion interactions are optimized so that
Soniat, Marielle, Pool, Grayson, Franklin, Lisette, Rick, Steven W   +3 more
openaire   +4 more sources

Theoretical and practical investigation of ion–ion association in electrolyte solutions

The Journal of Chemical Physics
In this study, we present a new equation of state for electrolyte solutions, integrating the statistical associating fluid theory for variable range interactions utilizing the generic Mie form and binding Debye–Hückel theories. This equation of state underscores the pivotal role of ion–ion association in determining the properties of electrolyte ...
Saman Naseri Boroujeni, B. Maribo-Mogensen, X. Liang, G. M. Kontogeorgis   +3 more
openaire   +4 more sources

Ion association in water solution of soil and vadose zone of chestnut saline solonetz as a driver of terrestrial carbon sink [PDF]

Solid Earth, 2016
The assessment of soil and vadose zone as the drains for carbon sink and proper modeling of the effects and extremes of biogeochemical cycles in the terrestrial biosphere are the key components to understanding the carbon cycle, global climate system ...
A.-M. A. Batukaev, A. P. Endovitsky, A. G. Andreev, V. P. Kalinichenko, T. M. Minkina, Z. S. Dikaev, S. S. Mandzhieva, S. N. Sushkova   +7 more
doaj   +2 more sources

Liquid-liquid extraction of ion-association complexes of cobalt(II)-4-(2-pyridylazo)resorcinol with ditetrazolium salts [PDF]

Journal of the Serbian Chemical Society, 2015
The formation and liquid-liquid extraction of ion-association complexes between Co(II)-4-(2-Pyridylazo)resorcinol (PAR) anionic chelates and cations of three ditetrazolium chlorides were studied: Blue Tetrazolium chloride (BTC), Neotetrazolium ...
Divarova Vidka V., Stojnova Kirila T., Racheva Petya V., Lekova Vanya D., Dimitrov Atanas N.   +4 more
doaj   +2 more sources

Redefined ion association constants have consequences for calcium phosphate nucleation and biomineralization. [PDF]

Nat Commun
Calcium orthophosphates (CaPs), as hydroxyapatite (HAP) in bones and teeth are the most important biomineral for humankind. While clusters in CaP nucleation have long been known, their speciation and mechanistic pathways to HAP remain debated. Evidently,
McDonogh DP, Gale JD, Raiteri P, Gebauer D.   +3 more
europepmc   +2 more sources

Additives influence the phase behavior of calcium carbonate solution by a cooperative ion-association process. [PDF]

Journal of materials chemistry. B, 2018
Amorphous calcium carbonate (ACC) has been widely found in biomineralization, both as a transient precursor and a stable phase, but how organisms accurately control its formation and crystallization pathway remains unclear. Here, we aim to illuminate the
Zhaoyong Zou, I. Polishchuk, L. Bertinetti, B. Pokroy, Yael Politi, P. Fratzl, W. Habraken   +6 more
semanticscholar   +1 more source

Spectrophotometric Determination of Ibuprofen and Nystatin Via Ion Pair Complex Formation Using Chromotrope 2R [PDF]

مجلة التربية والعلم, 1970
This research paper tackles a developed method for Ibuprofen and Nystatin drugs determination both in their pure form and pharmaceutical formulations. The proposed method is based on the formation of binary complexes (ion association complexes) between ...
Intisar Shihab, Theiaa Al-Sabha
doaj   +1 more source

Determination of Single-Ion Partition Coefficients between Water and Plasticized PVC Membrane Using Equilibrium-Based Techniques

Membranes, 2022
An experimentally simple method for the direct determination of single-ion partition coefficients between water and a PVC membrane plasticized with o-NPOE is suggested. The method uses the traditional assumption of equal single-ion partition coefficients
Andrei V. Siamionau, Vladimir V. Egorov
doaj   +1 more source

When spectroscopy fails: The measurement of ion pairing [PDF]

, 2006
Spectroscopic techniques such as UV/vis, NMR, and Raman are powerful tools for the investigation of chemical speciation in solution. However, it is not widely recognized that such techniques do not always provide reliable information about ion ...
Hefter, G.
core   +2 more sources