Natural clinoptilolite composite membranes on tubular stainless steel supports for water softening.

Disk membranes generated from high-purity natural clinoptilolite mineral rock have shown promising water desalination and de-oiling performance. In order to scale up production of these types of membranes for industrial wastewater treatment applications, a coating strategy was devised. A composite mixture of natural clinoptilolite from St.

XPS characterization of silver exchanged ETS-10 and mordenite molecular sieves.

Silver exchanged molecular sieves ETS-10 (Ag-ETS-10) and mordenite (Ag-mordenite) were dehydrated under vacuum at temperatures between 100 degrees C-350 degrees C. Changes in the state of the silver were studied using X-ray photoelectron spectroscopy (XPS). Silver cations in titanosilicate Ag-ETS-10 are fully reduced to Ag(0) at temperatures as low as 150 degrees C.

Stability and disintegration of ultrathin heptane films in water: molecular dynamics simulations.

Molecular dynamics simulations of ultrathin heptane films (less than 5 nm in thickness) in water were conducted to study their stability and disintegration behavior. The density distributions of heptane and water molecules across the film were determined for different equilibrium film thicknesses ranging from 1.5 to 4 nm.

Immunotropic properties of 2-aminobenzimidazole derivatives in cultures of human peripheral blood cells, Part 5.

The reaction of 2-aminobenzimidazole with selected 4-methoxy-,2,4-dimethoxy-, 4-chloro-, 4-nitro-, and 2-nitrocinnamic acid under different conditions has been described. Two series of derivatives were obtained: 4-aryl-1,2,3,4-tetrahydropyrimido[1,2-a]-benzimidazol-2-ones (1-3) or substituted amides 4, 5, 7. The following compounds: 4-(p-methoxyphenyl)- (1), 4-(2,4-dimethoxyphenyl)- (2), 4-(p-chlorophenyl)-1,2,3,4-tetrahydropyrimido[1,2-a]benzimidazo l-2-one (3), amides: 2-(p-nitrocinnamoylamino)- (4), 2-(p-methoxycinnamoylamino)-benzimidazole (5), and 3-methyl-1,2,3,4-tetrahydropyrimido[1,2-a]benzimidazol-2-one (6), recently synthesized, have been selected for further studies.