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...

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...

A fast gas flow through a negative glow plasma creates an afterglow region where supercooled electrons are separated from energetic beam electrons to produce a population inversion by collisional recombination. We report spatially-resolved electron temperature measurements of the afterglow plasma showing electron temperatures in the range of 750-1100 K under steady-state conditions. A 4 em long...

Physicochemical and electrochemical properties of N,N,N-dimethylbutylammonium methanesulfonate, [DMBA][MS], ionic liquid (IL) have been determined, the potential application for recovery lead from lead-acid batteries is discussed. To optimise transport IL, dependences were measured conductivity, density viscosity with varying amounts excess acid water as a diluent in electrolyte mixture. Molar ...