Piccirillo, ClaraPintado, M. E.Castro, Paula M. L.2014-05-062014-05-062013PICCIRILLO, Clara; PINTADO, Manuela M.; CASTRO, Paula M. L. - Hydroxyapatite and Calcium Phosphates from Marine Sources: Extraction and Characterization. In Se-Kwon Kim (ed.) - Marine Biomaterials: Characterization: Isolation and Applications. USA : CRC Press, 2013. ISBN 978-1-4665-0564-3. p. 29-44http://hdl.handle.net/10400.14/14175Hydroxyapatite (HAp), Ca10(PO4)6(OH)2, is a chemical compound widely employed as a biomaterial, more specifically as a bone substitute (Dorozhkin, 2010). HAp is the main component of human and animal bones; it generally constitutes between 60 and 70 wt% of the bone, while the remaining part is collagen. The percentage of HAp in the bone can vary, if different animal species are considered; parameters such as the age of the animal can also affect this.engbook part10.1201/b14723-8