Bioactivity and mineralization of hydroxyapatite with bioglass as sintering aid and bioceramics with NaCa(PO) and Ca(PO)SiO in a silicate matrix.

Hydroxyapatite and Bioglass-45S5 were sintered together creating new ceramic compositions that yielded increased apatite deposition and osteoblast differentiation and proliferation in vitro compared to hydroxyapatite. The sintered products characterized by X-ray diffraction, revealed hydroxyapatite as the main phase when small quantities (1, 2.5 and 5wt.

Seasonal differences in ventricular proliferation of adult Gallotia galloti lizards.

Lizards present neuronal production throughout the telencephalon in their adult state, both naturally and after experimentally induced brain lesions. As in birds, lizards present seasonal behavioural variations. In birds, such variations have been shown to alter neuronal production.