000134725 001__ 134725
000134725 005__ 20180317093502.0
000134725 02470 $$2ISI$$a000171226000046
000134725 037__ $$aCONF
000134725 245__ $$aCalcium phosphate precipitation under biomineralization conditions: Effect of microgravity
000134725 269__ $$a2000
000134725 260__ $$aNone$$bNone$$c2000
000134725 336__ $$aConference Papers
000134725 520__ $$aStructure and morphology of solid particles in precipitation from aqueous solutions correlate with formation (solution) conditions and thus reflect the growth mechanism. Calcium phosphate precipitation obtained from dilute aqueous solutions at room and body temperatures and pH5.5 - 7.5 were investigated by high-resolution transmission electron microscopy (HRTEM), transmission electron diffraction (selected-area diffraction and microdiffraction), scanning electron microscopy and X-ray diffraction, Supersaturated solutions of calcium phosphates were prepared by different methods of mixing of the stock solutions: diffusion-controlled mixing in space, convection-controlled mixing on earth and forced mixing on earth. A combination of HRTEM with image calculation, microdiffraction and image processing provided full information on the state of matter, local phase composition of crystals and atomic structure when small particles and small areas on large samples are considered. It was shown the strong dependence of these parameters on concentrations of the stock solutions, rate of solution mixing and duration of precipitation. Phase analysis by HRTEM and electron microdiffraction demonstrated two crystalline compounds in precipitation hydroxyapatite (HAP) and octacalcium phosphate (OCP) independent on the sizes of crystals and grains in crystals.
000134725 700__ $$0241717$$aSuvorova, E. I.$$g133598
000134725 7112_ $$a1st International Symposium on Microgravity Research and Applications in Physical Sciences and Biotechnology$$cSorrento, Italy$$dSep 10-15, 2000
000134725 773__ $$q331-336$$tProceedings
000134725 909CO $$ooai:infoscience.tind.io:134725$$pENAC$$pconf
000134725 909C0 $$0252011$$pEML$$xU11256
000134725 937__ $$aEML-CONF-2009-002
000134725 973__ $$aEPFL$$rREVIEWED$$sPUBLISHED
000134725 980__ $$aCONF