Fig. 5From: Preparation of gamma poly-glutamic acid/hydroxyapatite/collagen composite as the 3D-printing scaffold for bone tissue engineeringXRD patterns of the 3D scaffolds (Col, Col-P, and Col-HA) and 2D membrane (Col-HA-M) with peaks of appetite crystal structure as a function of SBF immersion time on 7, 14, and 21Â daysBack to article page