List of Articles hydroxyapatite Open Access Article Abstract Page Full-Text 1 - Estimation of the mean grain size of mechanically induced Hydroxyapatite based bioceramics via artificial neural network Mohammad Fahami Majid Abdellahi Open Access Article Abstract Page Full-Text 2 - Hydroxyapatite Nano-Particles Extracted from Miscellaneous Bestial Resources: Study of Crystal Structure and Microstructure Seyed Mehdi Rafiaei Mohammad Khodaei Fateme Eslami 20.1001.1.2322388.2020.8.3.1.4