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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Youness, Rasha A. Abo-Naf, Sherief M. Zayed, Hamdia A. El-Sayed, El-Sayed M. Khalil, El-Sayed M. |
| Description | Author Affiliation: Abo-Naf SM ( Glass Research Department, National Research Centre (NRC), El-behoos Str., Dokki, 12622 Cairo, Egypt. Electronic address: sheriefabonaf@yahoo.com.); Khalil el-SM ( Spectroscopy Department, National Research Centre (NRC), El-behoos Str., Dokki, 12622 Cairo, Egypt.); El-Sayed el-SM ( Physics Department, Faculty of Science, Ain-Shams University, Cairo, Egypt.); Zayed HA ( Physics Department, Faculty of Girls, Ain-Shams University, Cairo, Egypt.); Youness RA ( Spectroscopy Department, National Research Centre (NRC), El-behoos Str., Dokki, 12622 Cairo, Egypt.) |
| Abstract | Na2O-CaO-B2O3-P2O5 glasses have been prepared by the melt-quenching method. B2O3 content was systematically increased from 5 to 30 mol%, at the expense of P2O5, in the chemical composition of these glasses. Density, Vickers microhardness and fracture toughness of the prepared glasses were measured. In vitro bioactivity of the glasses was assessed by soaking in the simulated body fluid (SBF) at 37±0.5°C for 3, 7, 14 and 30 days. The glasses were tested in the form of glass grains as well as bulk slabs. The structure and composition of the solid reaction products were analyzed using X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), transmission electron microscopy (TEM) and scanning electron microscopy (SEM) coupled with energy dispersive spectroscopy (EDS). The kinetics of degradation of the glass particles were monitored by measuring the weight loss of the particles and the ionic concentration of Ca, P and B in the SBF solution using inductive coupled plasma-atomic emission spectroscopy (ICP-AES). The obtained results revealed the formation of a bioactive hydroxyapatite (HA) layer, composed of nano-crystallites, on the surface of glass grains after the in vitro assays. The results have been used to understand the formation of HA as a function of glass composition and soaking time in the SBF. It can be pointed out that increasing B2O3 content in glass composition enhances the bioactivity of glasses. The nanometric particle size of the formed HA and in vitro bioactivity of the studied glasses make them possible candidates for tissue engineering application. |
| ISSN | 13861425 |
| Volume Number | 144 |
| e-ISSN | 18733557 |
| Journal | Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy |
| Language | English |
| Publisher | Elsevier |
| Publisher Date | 2015-06-05 |
| Publisher Place | Great Britain (UK) |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Biocompatible Materials Chemistry Pharmacology Boron Compounds Glass Materials Testing Mechanical Phenomena Body Fluids Hardness Microscopy, Electron, Transmission Molecular Weight Spectrometry, X-ray Emission Spectrophotometry, Atomic Spectroscopy, Fourier Transform Infrared X-ray Diffraction Journal Article Discipline Spectroscopy |
| Content Type | Text |
| Resource Type | Article |
| Subject | Spectroscopy Atomic and Molecular Physics, and Optics Analytical Chemistry Instrumentation |
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