Conversion of Calcified Algae (&lt;i&gt;Halimeda &lt;/i&gt;sp) and Hard Coral (&lt;i&gt;Porites &lt;/i&gt;sp) to Hydroxyapatite

Choi, Gina; Karacan, Ipek; Cazalbou, Sophie; Evans, Louise; Sinutok, Sutinee; Ben‐Nissan, Besim

doi:10.4028/www.scientific.net/kem.758.157

Cited by 10 publications

(16 citation statements)

References 11 publications

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“…Combined with the results observed from FTIR, and the width of the diffraction peaks, the current results confirm that the apatitic structure formed is not pure hydroxyapatite but poorly crystallized carbonate apatite. These results are similar to previous findings that observed conversions with coralline structures and sea snail shells [6,[12][13][14]36].…”

Section: Resultssupporting

confidence: 92%

Conversion of snail shells (Achatina achatina) acclimatized in Benin to calcium phosphate for medical and engineering use

et al. 2019

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This is an author's version published in: http://oatao.univ-toulouse.fr/25561 Abstract Most methods for producing calcium phosphates involve synthetic calcium and phosphates sources. However, it has recently been proposed that calcium phosphate can be produced with bio-based calcium sources such as nacre, coral, and cuttlefish bones. One specific source of bio-based calcium is found in the Achatina snail shell, which becomes a waste product after flesh consumption. The present work aimed to assess the effectiveness of Achatina snail shells and to study the conversion kinetics in both acid and alkaline environment rich in phosphate ions. It was observed that in acidic conditions, the calcium released by the dissolution of the aragonite precipitates with the phosphate ions ofreaction medium induces brushite formation which is rapidly converted into monetite. In alkaline conditions, calcium released from aragonite reacts with surrounding phosphates and car bonate ions and induces carbonated apatite precipitation. Regardless of the source of calcium used in the presence of phosphate, the conversion is carried out according to complex phenomena that involve topotactic transformation or dissolution-precipitation mechanisms.

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Section: Resultssupporting

confidence: 92%

Conversion of snail shells (Achatina achatina) acclimatized in Benin to calcium phosphate for medical and engineering use

et al. 2019

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“…The FTIR spectra of collagen extracted from the O. niloticus fish skin appeared as Amide I, which was the carbonyl group (C=O) and amino group (N-H) in the peptide helix at wavenumber 1,651.74 and 1,700 cm −1 , respectively consistent with the results reported by Baláž (2014). 1,4 The other Amide III of (N-H) appeared at 1,239.04 cm −1 and at 1,237-1,239 cm −1 , which were consistent with the FTIR results reported by Elbialy et al (2020) and Huang et al (2016), respectively. 5,6 In addition, another peak of the amide group occurred at 2,933.50 cm −1 , belonging to the unsymmetrical group δ (CH2).…”

Section: Physical Properties Of Raw Materials Ha and Collagensupporting

confidence: 90%

Bio-Composite Materials of Porous Hydroxyapatite and Collagen from Eggshell Membrane and Oreochromis niloticus Fish Skin as Tissue Engineering

Ingwattanapok

Sakunrak

Tangboriboon

2022

Preprint

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Porous hydroxyapatite (HA) was prepared by a chemical reaction between eggshell and phosphoric acid mixed with a foaming agent. The mineral was composited with collagen via a fermentation process conducted with biocomposite materials of Acetobacter xylinum eggshell membranes, extraction and freeze-drying of Oreochromis niloticus, and commercial-grade collagen. Results of physical-mechanical-thermal properties of the biocomposite materials yielded them as potential candidates for tissue engineering or scaffolding, drug delivery through the body, as well as tissue regeneration. An ideal sample was discovered as HA and collagen encoded with 64HA-1NaHCO3-500 in collagen suspension, prepared from the extraction of eggshell membrane by A. xylinum, together with extraction and freeze-drying of O. niloticus. The received compressive strength of 64HA-1NaHCO3-500 in eggshell and fish skin collagen was 1.30 ± 0.02 and 1.71 ± 0.02 MPa, respectively. Both biocomposite samples served as positive thermal shock resistance absorbers with significantly strong SEM adhesion microstructures of collagen fibers within the porous HA matrices.

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“…In a recent study, the green calcified algae Halimeda cylindracea was converted to HAp [96]. Halimeda species are one of the most heavily calcified algae that are abundant in tropical regions and coral reefs [86,97].…”

Section: Calcified Macroalgaementioning

confidence: 99%

“…FTIR spectroscopy has been used in many publications to characterise HAp derived from biogenically derived CaCO 3 [14,70,82,94,96]. It has also been used to characterise impurities such as adsorbed carbon dioxide (CO 2 ) from the atmosphere and residual CaCO 3 that did not undergo complete conversion to HAp [70,82].…”

Section: Fourier Transform Infrared Spectroscopymentioning

confidence: 99%

“…It allows for microscopic structures such as the unique morphology of minerals and crystals to be examined [117,118]. SEM has been used extensively by many authors to examine the porous microarchitecture of calcified marine organisms and biogenically derived HAp [14,69,70,84,88,94,96]. The interconnectivity between the pores has also been examined as it is crucial for bone grafting and bone tissue engineering applications.…”

Section: Scanning Electron Microscopymentioning

confidence: 99%

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Calcified Algae for Tissue Engineering

Choi

Evans

2019

Springer Series in Biomaterials Science and Engineering

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Extensive research has been conducted on hydroxyapatite as a bone tissue engineering scaffold due to its low toxicity, biocompatibility, bioactivity and chemical similarity to bone. Hard coral species as well as red and green calcified marine algae have naturally porous skeletons that resemble cancellous bone. Under controlled hydrothermal conditions, these materials can be converted to hydroxyapatite with their porosity and interconnectivity preserved. The availability of hard coral species is limited due to the damage caused by harvesting procedures and decline in coral reefs. As an alternative, hydroxyapatite can be produced from red and green algae species. Currently, red algae derived Algipore® grafts are commercially available for maxillary sinus bone augmentation. Long term clinical studies have confirmed the bone regenerating capabilities of Algipore® when mixed with autologous bone debris and blood, but research on the use of Algipore® tissue scaffolds seeded with mesenchymal stem cells is still ongoing. This chapter reviews the synthesis of hydroxyapatite derived from marine algae and gives background to clinical studies as well as the characterisation techniques used to analyse these materials.

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Conversion of Calcified Algae (<i>Halimeda </i>sp) and Hard Coral (<i>Porites </i>sp) to Hydroxyapatite

Cited by 10 publications

References 11 publications

Conversion of snail shells (Achatina achatina) acclimatized in Benin to calcium phosphate for medical and engineering use

Conversion of snail shells (Achatina achatina) acclimatized in Benin to calcium phosphate for medical and engineering use

Bio-Composite Materials of Porous Hydroxyapatite and Collagen from Eggshell Membrane and Oreochromis niloticus Fish Skin as Tissue Engineering

Calcified Algae for Tissue Engineering

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