background sulfur oxides released from the burning of oil causes severe environmental pollution. the sulfur can be removed via the 4s pathway in biodesulfurization (bds). immobilization approaches have been developed to prevent cell contamination of oil during the bds process. objectives the encapsulation of rhodococcus erythropolis r1 in calcium alginate beads was studied in order to enhance c...

in the current paper, finite element method is employed for numerical simulations and the study of influential parameters on elastic modulus of polymer-matrix nano-composites. effects of different key parameters including particle elastic modulus, interphase elastic modulus, matrix elastic modulus, interphase thickness and particle volume fraction on total elastic modulus of nano-composite mate...

In this study, solid-phase microextraction fibers coated with modified silica particles (5 pm dp) bonded to methyl (C1), hexyl (C6), octyl (C8), and polymeric octadecyl (C18) groups are prepared and evaluated. Selective extraction of polycyclic aromatic hydrocarbons (PAHs) from river water is used to demonstrate the selective behavior of the fibers as a function of the alkyl chains bonded to th...

We demonstrate a rice leaf-like hierarchically textured polymer fiber array for anisotropic non-wetting surfaces. To provide superhydrophobicity in addition to the anisotropic behavior, fiber surfaces are spray coated with organically modified silica nanoparticles. The resulting micro/nano hierarchically structured fiber surfaces demonstrate anisotropic non-wetting properties. We designed vario...

magnetite (feo.fe2o3) nanoparticles immobilized on silica and modified by treatment apolaccase were used to decolorize the industrial wastewater from basic red 9 (br9 by way of fenton and fenton-like processes. the surface changes to the silica were determined by scanning electron microscopy, fourier transform infrared spectroscopy, x-ray diffraction and energy-dispersive x-ray spectroscopy. th...

Improving the mechanical properties of epoxy-based adhesives with nanoparticles is one methods which justifies use adhesive joints significantly. This work studies strength adhesively bonded single-lap (SLJs) considering pure adhesive, reinforced nano-silica particles (NSPs), nano-clay (NCPs), and a combination both nano particles. Uniaxial tensile testing SLJs was conducted to reveal failure l...

Nano-TiO2 (NT) and nano-SiO2 (NS) were separately added in the cement paste to investigate the rheological property of fresh mixtures and mechanical strength in hardened state. The effects of different dosages and types of nano-particles on the properties of cement paste were studied. The results indicated that the rheological behavior of the fresh cement paste coincides with the Modified Bingh...

A novel scheme for using modified colloidal crystals as templates for silica polymerization is reported. 3D close-packed crystals of submicrometer latex spheres are assembled on a membrane surface by filtration. To induce silica polymerization, the particles are modified by adsorption of the surfactant hexadecyltrimethylammonium bromide. The colloidal crystals are then infused with a silica sol...

The surface characteristics of hydrous silica-coated TiO particles are experimentally studied. Different analytical techniques were 2 Ž . used to characterize the Si oxide coatings on TiO particles. The high-resolution transmission electron microscope HRTEM , z-potential 2 Ž . analyzer and X-ray photoelectron spectroscope XPS analyses show that hydrous silica is continuously coated on the surfa...