background: titanium (ti) implants are commonly coated with hydroxyapatite (ha). however, ha has some disadvantages such as brittleness, low tensile strength and fracture toughness. it is desirable to combine the excellent mechanical properties of zro2 and the chemical inertness of al2o3 with respect to the purpose of this project which was coating ti implants with ha-zro2-al2o3 to modify the s...

The Al2024 matrix composites reinforced by different weight percentages of nano-ZrO2 particles prepared stir-cast method. Physical and mechanical properties (microhardness, compressive test elastic moduli) the samples were measured. Moreover, effect sliding distance applied load on wear behavior all was studied. results showed that relative density decreased with increase while apparent porosit...

We have investigated the diffusion coefficient of nano-meter-sized domains on a vesicle composed of saturated phospholipids, unsaturated phospholipids and cholesterols by means of neutron spin echo spectroscopy. The obtained diffusion coefficient was examined from a viewpoint of the hydrodynamic model of Brownian objects in a fluid membrane.

Smart power grid is the future transformation of the current power systems into controlled two-way power flow networks. Smart grid allows the interactive service between customers and grid operators and permits fully integration of distributed and renewable energy resources into the electrical power system. The main objectives of the smart grid are to increase the efficiency, reliability and op...

Zr2WP2O12/ZrO2 composites were fabricated by solid state reaction with the goal of tailoring the thermal expansion coefficient. XRD, SEM and TMA were used to investigate the composition, microstructure, and thermal expansion behavior of Zr2WP2O12/ZrO2 composites with different mass ratio. Relative densities of all the resulting Zr2WP2O12/ZrO2 samples were also tested by Archimedes' methods. The...

Coumarins play an important role in drug development with diverse biological applications. Herein, we present the synthesis of coumarin through Pechmann reaction by using zirconia-based heterogeneous catalysts (ZrO2-TiO2, ZrO2-ZnO, and ZrO2/cellulose) in a solvent-free condition at room temperature. ZrO2-TiO2, ZrO2-ZnO, and ZrO2/cellulose were identified through spectroscopic techniques such as...

The chromatographic selectivities of polystyrene-coated zirconia (PS-ZrO2) have been investigated in detail by means of homologue series retention studies and studies of a variety of nonpolar aromatic positional isomers. This material has been compared to polybutadiene-coated zirconia, octadecyl- and phenyl-bonded silica, and polymer-based reversed phases. In addition, the separations of a wide...

In this paper the role of nanobiotechnology in the study of biological systems in water environment is presented. The functional nano-meter-scale structures in the cell such as genetic material, membranes, enzymes and molecular machines are decribed. The knowledge gained has applications in nanomedicine. Nanoparticles have practical applications in detection of water pollution and water purific...

The Nano Spray Dryer B-90 offers a new, simple, and alternative approach for the production of drug nanocrystals. Among attractive drugs, calpain inhibitor that inhibits programmed cell death 'apoptosis' is a candidate for curing apoptosis-mediated intractable diseases such as Alzheimer's disease and Parkinson's disease. In this study, the preparation of calpain inhibitor nanocrystals using Nan...

Nanotechnology is an emerging and rapidly growing field with its application in science and technology for the purpose of manufacturing new materials at the nano scale level (Albrecht et al., 2006). Nanotechnology is a field that is burgeoning day by day making an impact in all spheres of human life (Vaidyanathan et al., 2009). The word Nano is used to indicate one billionth of a meter or 10-9....