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Scaffold preparation by solid¨Cliquid phase separation: a known amount of polylactide was dissolved in dioxane to form solutions with desired concentrations. Four different concentrations of PLLA solution (0.5, 1.0, 3.0 and 5.0% w/v) were frozen and maintained over 2 hr to induce solid¨Cliquid phase separation completely. The clear 5% PLLA solutions were poured into aluminum foil molds (4x4 cm2) which were fast-frozen in liquid
nitrogen, ice-water bath or freezer, respectively, and then were maintained at those
temperatures for over 2 hr to induce solid¨Cliquid phase separation completely. Solvent was removed by freeze-drying for 3 days and the dried scaffolds were then kept in a desiccator until characterization or usage.
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wanss(½ð±Ò+3): 2010-11-27 17:19:02
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