In this paper, synthesis of hydroxyapatite (HAp) in the absence or presence of 1.05 wt% magnesium oxide, as sintering additive, by heating in a microwave oven was studied. For this purpose, CaSO(4).2H(2)O, Ca(OH)(2), Mg(OH)(2) and (NH(4))(2)HPO(4) were used as raw materials. The total chemical reactions for all the studied compositions were observed after a 3 h microwave treatment. In case of pure hydroxyapatite, a powder with needle-like grains results. In the presence of Mg(OH)(2), the (Mg, Ca(2)).O.(HPO(4))(2).H(2)O hydrated phosphate is formed besides hydroxyapatite. Pure hydroxyapatite, thermally treated at 1,200 degrees C, mostly transforms in beta-Ca(3)P(2)O(8). By adding MgO into the precursor mixture, hydroxyapatite was stabilised, and found in a much greater proportion at 1,200 degrees C. After the thermal treatment, the hydroxyapatite, analysed by electronic microscopy, shows a prismatic morphology originating in its initial state.
We previously demonstrated that the tamoxifen-selected, MCF-7 derivative, TMX2-28, lacks expression of estrogen receptor α (ERα) and is highly invasive, yet maintains an epithelial morphology. The present study was designed to further characterize TMX2-28 cells and elucidate their invasion mechani...
We report synthesis of hexagonal LaVxCr1-xGe3 (x = 0-0.21, 1.00) single
Crystals, and present a systematic study of this series by measurements of
Temperature and field dependent magnetic susceptibility, magnetization,
Resistivity, and specific heat. Ferromagnetism has been observed for x =
We describe an experiment
Integrating Diffractive Optic Elements (DOE's) with surface electrode traps,
Connected through in-vacuum multi-mode fibers. The square DOE's reported here
Were all designed with solid angle collection efficiencies of 3.58%; with all
Losses included a detection efficiency of...
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