A procedure for obtaining crystalline preparations of the amine oxidase of Aspergillus niger has been developed. The method involved fractionations with ammonium sulfate and separation on successive columns of DEAE-cellulose, DEAE-sephadex and hydroxyl apatite. Crystals were formed when solid ammonium sulfate was added to solutions of the purified enzyme (of about 300to 350-times the specific a...

In this study, we proposed Cu-doped TiO2, prepared by the alkaline and heat treatment of titanium (Ti) metal, for use in dental applications because its bone-bonding antibacterial properties generated release Cu ions visible-light-responsive photocatalysis. We successfully TiO2 on a Ti chip surface with content 7 at.%. The apatite-forming ability was evaluated using simulated body fluid it foun...

Introduction: Lunar meteorites arguably provide a wider sampling of the lunar surface compared to the samples collected during the Apollo and Luna Missions. Apatite is the main hydroxyl-bearing (proxy for water) mineral in lunar samples, especially in basaltic rocks. The ages of lunar basaltic meteorites also span a larger range compared to basaltic samples collected during Apollo and Luna miss...

In this study, a composite of bioactive glass (BG) and cordierite (BG-cord) was proposed to increase the strength bioactivity BG. Both BG were separately synthesized with method melting, then, they used fabricate BG-cord variation sintering temperature (600 1000 °C). The highest diametral tensile (DTS=30.54 MPa) shown by at 925 ºC. Bioactivity tests conducted soaking in Hank’s balanced salt sol...

OssiMend® Bioactive (Collagen Matrix Inc., NJ) is a three-component porous composite bone graft device of 45S5 Bioglass/carbonate apatite/collagen. Our in vitro studies showed that conditioned media the dissolution products OssiMend stimulated primary human osteoblasts to form mineralized bone-like nodules one week, basal culture (no osteogenic supplements). Osteoblast differentiation was follo...

PURPOSE This study aimed to assess the accuracy of low-dose dual-energy computed tomography (DECT) in predicting the composition of urinary calculi. MATERIALS AND METHODS A total of 52 patients with urinary calculi were scanned with a 128-slice dual-source DECT scanner by use of a low-dose protocol. Dual-energy (DE) ratio, weighted average Hounsfield unit (HU) of calculi, radiation dose, and ...

In this work needle like hydroxy apatite were synthesized in a reverse microemulsion droplets of water in cyclohexane, separated by a cationic surfactant and co-surfactant, in the presence of Na-polyacrylate (PAA) as an anionic polyelectrolyte. Characterization of the as formed HAp nanoparticles at the room temperature were carried out by X-ray diffraction (XRD) and Fourier transform infrared s...

In this work, we report the effect of biopolymers (starch and gelatin) on in vitro biocompatibility property of nano hydroxyapatite (nHAp) composites. Cell culture and MTT assays were performed for in vitro biocompatibility. They show that nHAp can affect the proliferation of cells and the nHAp-starch and nHAP-gelatin biocomposites have no negative effect on the cell morphology, viability and p...