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Scanning electron microscope of pure materials and scaffolds. C6-A250—scaffold contains collagen (6000 Da) and alginate (32,000–250,000 Da); C25-A250—scaffold contains collagen (25,000 Da) and alginate (32,000–250,000 Da); C25-A125—scaffold contains collagen (25,000 Da) and alginate (125,000 Da); C25-A63—scaffold contains collagen (25,000 Da) and alginate (63,000 Da); C25-A21—scaffold contains collagen (25,000 Da) and alginate (21,000 Da).
