Calcium pair potential

F. Floris, M. Persico, A. Tani and J. Tomasi, Hydration shell structure of the calcium ion from simulations with ab initio effective pair potentials, Chem. Phys. Lett., 227 (1994) 126-132. 

Corrales LR (1999) Dissociative model of water clusters. J Chemical Physics 110 9071-9080 Curtiss LA, Halley JW, Hautman J, Rahman A (1987) Nonadditivity of ab-initio pair potentials for molecular dynamics of multivalent transition metal ions in water. J Chem Phys 86 2319-2327 de Leeuw NH, Parker SC, Catlow CRA, Price GD (2000) Proton-containing defects at forsterite (010) tilt grain boundaries and stepped surfaces. Am Min 85 1143-1154 de Leeuw NH, Parker SC (1998) Surface stracture and morphology of calcium carbonate polymorphs calcite, aragonite, andvaterite An atomistic approach. JPhys ChemB 102 2914-2922... 

Tyrosine phosphorylation plays an important role in synaptic transmission and plasticity. Evidence for this role is that modulators of PTKs and PTPs have been shown to be intimately involved in these synaptic functions. Among the various modulators of PTKs, neuro-trophins have been extensively studied in this regard and will be our focus in the following discussion (for details of growth factors, see Ch. 27). BDNF and NT-3 have been shown to potentiate both the spontaneous miniature synaptic response and evoked synaptic transmission in Xenopus nerve-muscle cocultures. Neurotrophins have also been reported to augment excitatory synaptic transmission in central synapses. These effects of neurotrophins in the neuromuscular and central synapses are dependent on tyrosine kinase activities since they are inhibited by a tyrosine kinase inhibitor, K-252a. Many effects of neurotrophins on synaptic functions have been attributed to the enhancement of neurotransmitter release BDNF-induced increase in neurotransmitter release is a result of induced elevation in presynaptic cytosolic calcium. Accordingly, a presynaptic calcium-depen-dent phenomenon - paired pulse facilitation - is impaired in mice deficient in BDNF. 

E. Guardia, A. Robinson, and J.A. Padro, Mean force potential for the calcium-chloride in pair in water, J. Chem. Phys., 99 (1993) 4229-4230. 

Gu dia, E. Robinson, A. Padro, J. A. (1993) Mean Force Potential for the Calcium-Chloride Ion Pair in Water, Journal of Chemical Physics 99, 4229-4230... 

It is possible, but not yet proven, that the borate ion acts in a way similar to the sulfate ion. Like the sulfate anion, it does form soluble ion-pair complexes with calcium and magnesium ions and this may promote coadsorption on the chalk surface. However, in the absence of reliable data on borate ion adsorption and zeta potential data for chalk, it is difficult to confirm the mechanism behind the observed imbibition performance of borate. 

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