Critical Surface Tension of Sulfide Minerals

Sulfur Isotope Geochemistry of Sulfide Minerals

XPS and ab initio calculation of surface states of sulfide minerals: pyrite, chalcopyrite and molybdenite

Sulfide minerals contain sulphur in a large variety of coordination environments. Consequently, the S 2p XPS of various mineral surface states undergo different shifts in binding energy (BE) relative to the bulk, depending on the charge distribution on the surface. This in turn depends on the number, type and position of the atoms on the fracture surface, which is determined by the fracture mec...

SURFACE TENSION OF 4He NEAR THE CRITICAL POINT

The behaviour of simple liquids in the vicinity of the critical point is generally well understood. The relevant bulk quantities like compressibility, correlation length and density difference between the coexisting liquid and vapour phase are described by power laws, whose critical exponents are in close agreement with renormalization group calculations; relationships between these critical ex...

Salinity Effect on the Surfactant Critical Micelle Concentration through Surface Tension Measurement

One of the tertiary methods for enhanced oil recovery (EOR) is the injection of chemicals into oil reservoirs, and surface active agents (surfactants) are among the most used chemicals. Surfactants lead to increased oil production by decreasing interfacial tension (IFT) between oil and the injected water and to the wettability alteration of the oil reservoir rock. Since surfactants are predomin...

Surface Tension of Serum

An attempt was made to apply to the study of immune sera the fact, pointed out in our previous papers, that at a given dilution the serum shows a maximum drop of surface tension in function of time (time-drop). The results of the experiments here reported would seem to indicate that: 1. The time-drop of a serum solution is greater after the animal has been immunized than before immunization (fr...