nerve [3] and bone [4]. Natural polymers already have beenstudied using lyophilization method [5]: alginate [6], collagen andother synthetic polymers as polyvinyl alcohol [7]. Chitosan
nerve [3] and bone [4]. Natural polymers already have beenstudied using lyophilization method [5]: alginate [6], collagen andother synthetic polymers as polyvinyl alcohol [7]. Chitosan