Molecular dynamics (MD) simulations are used to probe the origin of the unexpected temperature dependence of salt accumulation in the C-terminal region of the protein human lymphotactin. As in previous MD simulations, sodium ions accumulate in an enhanced manner near the C-terminal helix at the lower temperature, while the temperature dependence of chloride accumulation is much weaker and sligh...

The potential-induced accumulation of electrolyte ions at the water/1,2-dichloroethane (DCE) electrochemical interface has been examined by total internal reflection second harmonic generation (TIR SHG). TIR SHG experiments provide the first direct optical measurements of the accumulation of the base electrolytes, tetraphenylarsonium (Ph4As) and tetraphenylborate (Ph4B), in the interfacial regi...

this study examines the effects of change in the concentrations of monovalent and divalent ions in the polymer-contained surfactant solution on the macroscopic behavior of viscous-modified surfactant waterflooding in heavy oil reservoirs. salts that are used in this set of floods were sodium chloride, magnesium chloride, and calcium chloride. the results indicate that four different ranges of s...

Larvae of the freshwater mosquito Aides aegypti (L.) are able to maintain their principal electrolytes against a steep concentration gradient between the haemolymph and the external medium. The concentration of monovalent ions such as Na, K and Cl~ is kept far above that in the external medium by processes of active transport which are located in the anal papillae, the rectum and the Malpighian...

Abstract A three-dimensional model based on molecular dynamics has been developed to describe the formation of a single cathode spot in vacuum arcs. The is assumed be controlled by plasma ions, effect which simulated LAMMPS through process ion bombardment. represented structured copper atoms, while ions are continuously injected into domain with certain velocity towards surface. Ion bombardment...

118 dentistry students were studied to show the possible correlation between ph, concentration of ca2+, p3+, na+, and k+ of saliva and decay, missing, and filling tooth (dmft index). candidates were between 20 and 30 years old and had no background systemic disorders; medial and dental histories, age, sex, and dmft index were recorded in a questionnaire organized for this purpose. saliva sample...

The interaction of the divalent calcium ions with the zwitterionic lipid membranes was studied by measuring the lipid order parameter which is inversely proportional to the membrane fluidity. Small unilamellar lipid vesicles were prepared from 1-palmitoyl-2-oleoyl-sn-glycero-3-phosphocholine and then treated with different concentrations of divalent calcium ions. An increase in the order parame...