Thin film nanocomposite (TFN) membranes containing MCM-41 silica nanoparticles (NPs) were synthesized by the interfacial polymerization (IP) process. An m-phenylenediamine (MPD) aqueous solution and an organic phase with trimesoyl chloride (TMC) dissolved in isooctane were used in the IP reaction, occurring on a nanoporous polysulfone (PSU) support layer. Isooctane was introduced as the organic...

This paper presents the effect of Sodium Chloride (NaCl) on Conventional Concrete (Silica Fume Based M30 Grade Concrete). The Silica Fume Based M30 Grade Concrete was prepared by adding NaCl concentrations of 0.5,2,4,6,8,10 and 12 g/l i n deionised water. In addition to this, control specimen was prepared with deionised water (without NaCl) for the purpose of co mpari son . The tensile strength...

Simple, easy to use and selective method of Al(III) sorption-spectroscopic (SS) determination was proposed. For this purpose, silica modified with tridecyloctadecylammonium chloride(SGII) using adsorption technique and glass slide modified with thin silica-poly(dimethyldiallyl-ammonium chloride) (SGI) composite film obtained by sol-gel technique were worked out. It was shown that lumogallion (L...

This paper compares the collection efficiency and capacity of a coated porous metal disk with those of a silica gel tube and an impinger at the acid or basic aerosol concentration of two times the permissible exposure limitation (Taiwan IOSH, Institute of Occupational Safety and Health), relative humidity of 80 +/- 5%, and temperature of 30 +/- 3 degrees C in the laboratory. Using 5% sodium car...

Suspensions of silica nanoparticles showed shear-thickening profiles under steady shear conditions up on addition of a small amount of poly(ethylene oxide) (PEO). The suspensions turned into gels upon shaking and their fluidity was recovered several minutes after resting. We studied the rheological properties of these shake gels with small amounts of sodium chloride (NaCl). Gelation occurred at...

describes the isolation, properties and structure of 1, which is related to dianemycin (2).X) The fermentation of S. hygroscopicus sp. ATCC 53626 and isolation of crude 1-Na as a hexane soluble oil (150g) was carried out as described elsewhere.2) This material was purified by HPLC on a Waters ^Bondapak C18 column using methanol water (90: 10), followed by HPLC on a silica gel column using methy...

BACKGROUND: The conventional solution-phase Chemical Cleavage of Mismatch (CCM) method is time-consuming, as the protocol requires purification of DNA after each reaction step. This paper describes a new version of CCM to overcome this problem by immobilizing DNA on silica solid supports. RESULTS: DNA test samples were loaded on to silica beads and the DNA bound to the solid supports underwent ...

We describe the synthesis of mesoporous silica fibers and discoids using disodium trioxosilicate (Na2SiO3 9H2O), a convenient silica source with cetyltrimethylmmonium chloride (CTAC) as a structure directing agent under acidic condition. The molar composition of the synthesis sol is 1Na2SiO3 9H2O:1.5CTAC:28HCl:729H2O. The fibers and discoids, both p6mm, hexagonal, are obtained at room temperatu...

We made environmental measurements to characterize contaminants generated when basaltic lava from Hawaii's Kilauea volcano enters sea water. This interaction of lava with sea water produces large clouds of mist (LAZE). Island winds occasionally directed the LAZE toward the adjacent village of Kalapana and the Hawaii Volcanos National Park, creating health concerns. Environmental samples were ta...

Silica-supported Pt nanoparticles were prepared from well-defined surface platinum(II) surface species, obtained by grafting of well-defined Pt(II) molecular precursors with specific ligands (Cl, Me, N(SiMe(3))(2), OSi(OtBu)(3)) onto silica partially dehydroxylated at 200 and 700 °C yielding well-defined platinum(II) surface species. This approach allowed for testing the effect of Pt density an...