Cu-Ag particles with homogeneous cover-silver layer were synthesized by electroless plating of copper particles with silver sulfate using eco-friendly sodium citrate (SC) as reducing agent, dispersant and chelating agent in an aqueous system. The influences of sodium citrate/Cu and sodium citrate/Ag ratios on Ag coatings of Cu powders were investigated. Ag formed a dense coating on the surface ...

Magnesium-substituted fluorapatite powders were synthesized by hydrothermal method, and their sintering behavior was investigated by dilatometry in the temperature range 25-1100°C. Analysis of the obtained powders by X-ray diffraction and (31)P NMR spectroscopy showed that the powders consisted of a single apatite phase and no amorphous phase has been formed. Compared to pure fluorapatite, the ...

In the current study cerium or galliumcontaining silicate based 13-93 bioactive glass powders were prepared using sol-gel method. Cerium and gallium ions were chosen due to their well-known therapeutic actions and antimicrobial properties. Effect of cerium and gallium substitution (up to 5w%) on the in vitro bioactivity, and mechanical properties of the prepared powders and scaffolds were asses...

Carbon nanotube (CNT) reinforced Cu matrix (CNT/Cu) nanocomposites are fabricated by a novel fabrication process, named as molecular evel process, which involves suspending CNTs in solvent by surface functionalization, mixing Cu ions with CNT suspension, drying, calcination nd reduction. The molecular level process produces CNT/Cu nanocomposite powders, in which the CNTs are homogeneously impla...

Tribological properties of Ethylene-Propylene-Diene-rubber (EPDM) containing electron modified Polytetrafluoroethylene (PTFE) have been investiagted with the help of pin on disk tribometer without lubrication for a testing time of 2 hrs in atmospheric conditions at a sliding speed and applied normal load of 0.05 m·s–1 and FN = 1 N, respectively. Radiation-induced chemical changes in electron mo...

We report a novel photochemical sterilization system in which Escherichia coli cells were sterilized with photosemiconductor powders (titanium oxide). For sterilization that could be used in practice, it was necessary to separate the TiO2 powders from the cell suspension. Therefore, semiconductor powders were immobilized on acetylcellulose membranes. We constructed a continuous-sterilization sy...

A methodology to quantify cholesterol oxidation products (COPS) in dairy products has been established by gas-liquid chromatography (GLC). Lipids were extracted according to the Folch method and saponified at room temperature using sodium hydroxide in methanol/benzene (3:2, v/v). Cholesterol oxides were derivatized to trimethylsilyl ethers and resolved by GLC, confirming the structures of chole...

Several methods for fabricating a dye sensitized solar cell (DSSC) are introduced for enhancing its photo-chacracterisitics 1 , 2 . The novel method, nano-particle deposition system (NPDS), suggests one of the outstanding ways to be applied in DSSC. NPDS is a novel method to deposit ceramic and metallic powders on substrate at room temperature, by accelelating particles up to supersonic veloc...

The powders of Ba(Ce1-xZrx)0.90Y0.1O3-δ (BCZY) with 0.2 ≤ x ≤ 0.6 have been prepared by a modified sol-gel method. Triethylenetetramine (TETA) was employed as chelating agent. Phase formation of calcined powders at 1100C and sintered pellets at 1400C of BCZY were examined by an X-ray diffractrometer (XRD). XRD results showed the calcined powder and sintered pellet formed a single perovskite pha...

Plant powders prepared from five plant species were tested under constant conditions at 30 ± 2°C and 60 65% r. h. for their ability to protect sorghum grains against Sitophilus zeamais in storage. Doses at 0.5, 1.0 and 2.0g and 0.12g of the check (permethrin (0.6%) were applied for assessments of adult mortality, emergence and damage. Leaf powders of E. balsamifera, J. curcas and L. inermis gav...