Study on Dispersion of TiO Nanopowder in Aqueous Solution via Near Supercritical Fluids.

In this study, we investigated the effects of near supercritical carbon dioxide (SCCO) parameters, including pressure, temperature, and saturation time on titanium dioxide (TiO) nanopowder dispersion in water-containing sodium hexametaphosphate (SHMP). The stability and morphology of TiO particles dispersed in an aqueous solution were examined using a zeta potential instrument, dynamic light scattering, and transmission electron microscopy. As shown in the results, of particular interest, it was found that near SCCO's pressure and saturation time had the strongest impact on TiO dispersion in water-containing SHMP.

Fabrication and characterization of silver/titanium dioxide composite nanoparticles in ethylene glycol with alkaline solution through sonochemical process.

This paper aims to study fabrication and characterization of silver/titanium oxide composite nanoparticle through sonochemical process in the presence of ethylene glycol with alkaline solution. By using ultrasonic irradiation of a mixture of silver nitrate, the dispersed TiO2 nanoparticle in ethylene glycol associated with aqueous solution of sodium oxide yields Ag/TiO2 composite nanoparticle with shell/core-type geometry. The powder X-ray diffraction (XRD) of the Ag/TiO2 composites showed additional diffraction peaks corresponding to the face-centered cubic (fcc) structure of silver crystallization phase, apart from the signals from the cores of TiO2.

Effect of an Epineurial-Like Biohybrid Nerve Conduit on Nerve Regeneration.

A novel approach of making a biomimetic nerve conduit was established by seeding adipose-derived adult stem cells (ADSCs) on the external wall of porous poly(d,l-lactic acid) (PLA) nerve conduits. The PLA conduits were fabricated using gas foaming salt and solvent-nonsolvent phase conversion. We examined the effect of two different porous structures (GS and GL) on ADSC growth and proliferation.

A scaffold-bioreactor system for a tissue-engineered trachea.

A scaffold-bioreactor system was developed for growing tissue-engineered trachea and the effect of fluid flow on producing trachea-like neotissue was investigated. Chondrocytes were seeded in the poly(epsilon-caprolactone)-type II collagen scaffold and grown in the bioreactor operated under continuous flow at a rotational speed from 5 to 20 rpm. Flow analysis showed that the maximal and minimal shear stress in the bioreactor was 0.