2009 JAN 5 - (VerticalNews.com) -- According to a study from Szczecin, Poland, "An emerging problem related to the development of polymer surfaces resistant to calcification was addressed in this work. Multiblock copolymers containing poly(ethylene terephthalate) (PET) (30 wt-%) as hard segment and dilinoleic acid (DLA) as soft segment were prepared in the presence of two concentrations of TiO2 particles (23 nm diameter) as nanofiller (0.2 and 0.4 wt-%) via in situ polycondensation process. ...read more

  2009 JAN 5 - (VerticalNews.com) -- "The alumina-zirconia nanocomposite powder has been synthesised by mechanical activation of a dry powder mixture of AlCl3, ZrCl4 and CaO. Mechanical milling of the above raw materials with the conditions adopted in this study resulted in the formation of a mixture consisting of crystalline CaO and amorphous aluminium and zirconium chlorides phases," scientists writing in the journal Advances in Applied Ceramics report ...read more

  2008 SEP 15 - (VerticalNews.com) -- "Nanocrystalline calcium phosphates (NC CP) are suitable for the synthesis of CP/bioresorbable polymer composite biomaterials for the application in bone engineering. There are different forms of NC CP/ bioresorbable polymers composite biomaterials," scientists in Serbia report.

  "Calcium phosphate was synthesised in highly NC form. A NC calcium phosphate/poly-DL-lactide-co-glycolide (CP/DLPLG) composite biomaterial in filler forms was synthesised in the shape of spherical granules (150-200 mu m in diameter) and nanoparticles (30-40 nm in diameter). Each CP granule or nanoparticle was coated with amorphous DLPLG polymer. Using NC and nanosized CP/ DLPLG composite materials, an injectable composite biomaterial was prepared. By hot pressing of highly porous NC CP/ bioresorbable polymer composite biomaterials at the polymer's melting temperature, blocks were obtained with relatively uniform distribution of phases," wrote N. Ignjatovic and colleagues ...read more