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Naji, M. |
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Motta, Antonella |
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Aletan, Dirar |
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Mohamed, Tarek |
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Ertürk, Emre |
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Taccardi, Nicola |
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Kononenko, Denys |
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Petrov, R. H. | Madrid |
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Alshaaer, Mazen | Brussels |
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Bih, L. |
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Casati, R. |
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Muller, Hermance |
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Kočí, Jan | Prague |
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Šuljagić, Marija |
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Kalteremidou, Kalliopi-Artemi | Brussels |
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Azam, Siraj |
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Ospanova, Alyiya |
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Blanpain, Bart |
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Ali, M. A. |
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Popa, V. |
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Rančić, M. |
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Ollier, Nadège |
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Azevedo, Nuno Monteiro |
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Landes, Michael |
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Rignanese, Gian-Marco |
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Skakle, Jan
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (11/11 displayed)
- 2021A pressure induced reversal to the 9R perovskite in Ba3MoNbO8.5citations
- 2011Synthesis of Bioceramic Compositions
- 2008Optimisation of the aqueous precipitation synthesis of silicatesubstituted hydroxyapatite
- 2008Optimisation of the aqueous precipitation synthesis of silicate-substituted hydroxyapatite
- 2007Comparison of Carbonate Hydroxyapatite with and without Sodium Co-Substitutioncitations
- 2007Synthesis of Novel High Silicate-Substituted Hydroxyapatite by Co-Substitution Mechanismscitations
- 2001Synthesis and characterisation of polymeric and oligomeric lead(II) carboxylatescitations
- 2001Structures of Mn(II) thiocyanate co-ordination polymers from flexible bipyridyl ligands
- 2001Synthesis of co-ordination networks from flexible bis-(4-pyridyl) ligands and cadmium saltscitations
- 2000Synthesis and crystal structure of [Mn(NCS)(2)L-2] (L=3,6-bis-(2-methylpyridyl)-1,2-pyridazine)
- 2000Synthesis and crystal structure of [Mn(NCS)2L2] (L = 3,6-bis-(2-methylpyridyl)-1,2-pyridazine)
Places of action
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booksection
Comparison of Carbonate Hydroxyapatite with and without Sodium Co-Substitution
Abstract
<p>Carbonate hydroxyapatite (CHA) bioceramics can be synthesised to contain sodium ions as a co-substituted ion, or as sodium-free compositions. it is unclear, however, which composition would produce the optimum biological response. The aim of this study was to find a reliable method to produce sodium co-substituted and sodium-free CHA compositions that would have the same level of carbonate substitution, and to characterise the effects of the two different substitutions on the structure of the CHA samples. After sintering at 900 degrees C in a CO2 atmosphere, ail samples contained approximately equal amounts of carbonate groups on the A- and B-sites, as observed by FTIR. The sample produced with NaHCO3 and the sodium-free sample (CHA1) have comparable carbonate contents, whereas the sample produced with Na2CO3 contains significantly more carbonate, probably due to the excess sodium ions allowing more carbonate co-substitution. The sodium-free CHA sample, however, has significantly smaller unit cell parameters compared to both sodium co-substituted CHA samples, and also to HA. This characterisation of the samples shows that the sodium-free CHA sample (CHA1) and the sample produced with NaHCO3 would provide CHA compositions for biological testing with similar carbonate contents and distributions, but with structural differences due to the sodium substitution.</p>