Preparation and characterization of biocomposites based on chitosan and biomimetic hydroxyapatite derived from natural phosphate rocks

2021 ◽  
pp. 125421
Author(s):  
S. Brahimi ◽  
A. Ressler ◽  
K. Boumchedda ◽  
M. Hamidouche ◽  
A. Kenzour ◽  
...  
Keyword(s):  
Phosphate Rocks ◽  
Natural Phosphate ◽  
Biomimetic Hydroxyapatite

Preparation and characterization of anorthite and hydroxyapatite from Algerian kaolin and natural phosphate

2016 ◽  
Vol 126 (3) ◽  
pp. 1045-1057 ◽  
Author(s):  
H. Belhouchet ◽  
F. Chouia ◽  
M. Hamidouche ◽  
A. Leriche
Keyword(s):  
Natural Phosphate

Preparation and characterization of dopamine-induced biomimetic hydroxyapatite coatings on the AZ31 magnesium alloy

2015 ◽  
Vol 281 ◽  
pp. 82-88 ◽  
Author(s):  
Bingpeng Lin ◽  
Mei Zhong ◽  
Chengdong Zheng ◽  
Lin Cao ◽  
Dengli Wang ◽  
...  
Keyword(s):  
Magnesium Alloy ◽  
Az31 Magnesium Alloy ◽  
Hydroxyapatite Coatings ◽  
Biomimetic Hydroxyapatite

Fabrication, characterization, and in vitro study of zinc substituted hydroxyapatite/silk fibroin composite coatings on titanium for biomedical applications

2017 ◽  
Vol 32 (3) ◽  
pp. 399-409 ◽  
Author(s):  
Zhenyu Zhong ◽  
Jun Ma
Keyword(s):  
Silk Fibroin ◽  
Composite Coatings ◽  
In Vitro Study ◽  
Biological Behavior ◽  
Apatite Formation ◽  
Hydroxyapatite Coatings ◽  
High Bone ◽  
Biomimetic Hydroxyapatite

Zinc substituted hydroxyapatite/silk fibroin composite coatings were deposited on titanium substrates at room temperature by electrophoretic deposition. Microscopic characterization of the synthesized composite nanoparticles revealed that the particle size ranged 50–200 nm, which increased a little after zinc substitution. The obtained coatings maintained the phase of hydroxyapatite and they could induce fast apatite formation in simulated body fluid, indicating high bone activity. The cell culturing results showed that the biomimetic hydroxyapatite coatings could regulate adhesion, spreading, and proliferation of osteoblastic cells. Furthermore, the biological behavior of the zinc substituted hydroxyapatite coatings was found to be better than the bare titanium without coatings and hydroxyapatite coatings without zinc, increasing MC3T1-E1 cell differentiation in alkaline phosphatase expression.

scholarly journals Elaboration and characterization of new phosphate glasses based on natural phosphate and red clay: influence of the chemical composition on the chemical durability

2019 ◽  
Vol 9 (3) ◽  
pp. 222-235 ◽  
Author(s):  
Oumaima Jamal Eddine ◽  
Mehdi El Bouchti ◽  
Omar Cherkaoui ◽  
Hassan Hannache ◽  
Said Gmouh
Keyword(s):  
Chemical Composition ◽  
Structural Investigation ◽  
Fluorescence Analysis ◽  
Chemical Durability ◽  
Phosphate Glasses ◽  
Red Clay ◽  
Natural Phosphate ◽  
X Ray ◽  
Quenching Method

New phosphate glass formulations based on Moroccan natural phosphate minerals alone or with Moroccan red clay additive (containing the P2O5-SiO2-CaO-Al2O3-MgO-Fe2O3-K2O-Na2O-TiO2 complex) have been successfully prepared by the quenching method. The chemical composition of each of the elaborated phosphate glasses was determined by X-ray fluorescence analysis (XRF). These investigated phosphate glasses have an excellent homogeneity as was verified by SEM. Their amorphous behavior was confirmed by XRD and DSC. The increase in density and glass transition temperature due to the addition of clay is believed to be related to the crosslinking of the phosphate chains. Structural investigation of these phosphate glasses was carried out using FTIR and Raman spectroscopies. The results obtained show that the composition of these glasses contains a mixture of ultraphosphate and polyphosphate structural units. The concentrations of this mixture depending on the initial composition of the glass components. A correlation between the chemical composition and the chemical durability of the investigated glasses was studied. The results showed that the dissolution rate of the glasses decreases by increasing the clay composition up to a point. This can be explained by assuming the formation of oxygen bridges and strong bonds within the various glasses.

Synthesis and Characterization of Biomimetic Hydroxyapatite Nanoconstruct Using Chemical Gradient across Lipid Bilayer

2015 ◽  
Vol 7 (49) ◽  
pp. 27382-27390 ◽  
Author(s):  
Mukund Bahadur Koirala ◽  
Tuyen Duong Thanh Nguyen ◽  
Arunkumar Pitchaimani ◽  
Seong-O Choi ◽  
Santosh Aryal
Keyword(s):  
Lipid Bilayer ◽  
Synthesis And Characterization ◽  
Chemical Gradient ◽  
Biomimetic Hydroxyapatite

scholarly journals Preparation and Characterization of Biomimetic Hydroxyapatite Nanocrystals by Using Partially Hydrolyzed Keratin as Template Agent

Nanomaterials ◽  
2019 ◽  
Vol 9 (2) ◽  
pp. 241 ◽  
Author(s):  
Chunxia Gao ◽  
Ke Zhao ◽  
Liwei Lin ◽  
Jinyu Wang ◽  
Yang Liu ◽  
...  
Keyword(s):  
Tissue Repair ◽  
X Ray Diffraction ◽  
Natural Structure ◽  
X Ray ◽  
Tissue Repair And Regeneration ◽  
Transmission Electron ◽  
Biomimetic Hydroxyapatite ◽  
Hydroxyapatite Nanocrystals

Hydroxyapatite (HA), a typical inorganic component of bone, is a widely utilized biomaterial for bone tissue repair and regeneration due to its excellent properties. Inspired by the recent findings on the important roles of protein in biomineralization and natural structure of fish scales, keratin was chosen as a template for modulating the assembly of HA nanocrystals. A series of HA nanocrystals with different sizes were synthesized by adjusting the concentration of partially hydrolyzed keratin. The structure and compositions of the prepared HA were characterized by Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD), Raman spectrum, and Transmission electron microscopy (TEM). Results revealed that the size of the synthesized HA nanocrystals can be controlled by adjusting the concentration of partially hydrolyzed keratin. Specifically, the size of synthesized HA decreased from 63 ± 1.5 nm to 27 ± 0.9 nm with the increasing concentration of partially hydrolyzed keratin from 0 to 0.6g. In addition, in vitro cytocompatibility of synthesized HA nanocrystals were evaluated using the MG-63 cells.

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