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The porosity of the prepared scaffolds was measured using the liquid displacement technique. Briefly, the initial volume of ethanol was measured (V1), 20 mg of each scaffold was immersed into the ethanol for one hour and the volume was measured (V2), and finally, the scaffold was removed from the ethanol and the volume was measured (V3). Equation (2) was used to calculate the porosity:
where V1 is the initial volume of 96% ethanol, V2 is its volume after soaking of the scaffold in ethanol and V3 is the volume of the ethanol after the scaffold removal.
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