Characterization of the CaCO3 biomineral in coralline red algae (Corallinales) from the Pacific coast of Mexico
Coralline red algae assimilate HCO3– to precipitate CaCO3 in their tissues in the form of calcite or aragonite. A characterization of the biomolecular content and the crystalline structure of the biomineral of coralline red algae from the Pacific coast of Mexico was performed by powder X-ray diffra...
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| Format: | Article |
| Language: | English |
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Universidad Autónoma de Baja California
2010-03-01
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| Series: | Ciencias Marinas |
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| Online Access: | https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/1606 |
| _version_ | 1797279462928154624 |
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| author | D Fragoso F Ramírez-Cahero A Rodríguez-Galván R Hernández-Reyes A Heredia D Rodríguez M Aguilar-Franco L Bucio VA Basiuk |
| author_facet | D Fragoso F Ramírez-Cahero A Rodríguez-Galván R Hernández-Reyes A Heredia D Rodríguez M Aguilar-Franco L Bucio VA Basiuk |
| author_sort | D Fragoso |
| collection | DOAJ |
| description |
Coralline red algae assimilate HCO3– to precipitate CaCO3 in their tissues in the form of calcite or aragonite. A characterization of the biomolecular content and the crystalline structure of the biomineral of coralline red algae from the Pacific coast of Mexico was performed by powder X-ray diffraction (XRD), scanning electron (SEM) and tunneling microscopy (STM), and Fourier transform infrared spectroscopy (FTIR). The preliminary conclusion drawn from the results is that this type of calcite-aragonite biomineral has a very low organic content occluded within the crystals. FTIR bands at 2945 and 2889 cm–1 indicate that the most likely organic molecules are carbohydrates; moreover, peptide bond bands (amide I ~1640 and amide II ~1540 cm–1) were not detected, suggesting that proteins are not related to mineral synthesis or their stabilization. This could be explained if the biomineral is synthesized by a biologically controlled extracellular mineralization process. The XRD study showed two main mineral phases, calcite and aragonite, with very similar structural parameters to the inorganic mineral counterparts. The crystallite shapes, seen by STM, were found as plates and needles with different sizes, between 20 and 100 nm.
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| first_indexed | 2024-03-07T16:25:42Z |
| format | Article |
| id | doaj.art-65e9cf867d0f4160a0cad5245f0112e4 |
| institution | Directory Open Access Journal |
| issn | 0185-3880 2395-9053 |
| language | English |
| last_indexed | 2024-03-07T16:25:42Z |
| publishDate | 2010-03-01 |
| publisher | Universidad Autónoma de Baja California |
| record_format | Article |
| series | Ciencias Marinas |
| spelling | doaj.art-65e9cf867d0f4160a0cad5245f0112e42024-03-03T18:04:34ZengUniversidad Autónoma de Baja CaliforniaCiencias Marinas0185-38802395-90532010-03-0136110.7773/cm.v36i1.1606Characterization of the CaCO3 biomineral in coralline red algae (Corallinales) from the Pacific coast of MexicoD Fragoso0F Ramírez-Cahero1A Rodríguez-Galván2R Hernández-Reyes3A Heredia4D Rodríguez5M Aguilar-Franco6L Bucio7VA Basiuk8Universidad Nacional Autónoma de MéxicoUniversidad Nacional Autónoma de MéxicoUniversidad Nacional Autónoma de MéxicoUniversidad Nacional Autónoma de MéxicoUniversidad Nacional Autónoma de MéxicoUniversidad Nacional Autónoma de MéxicoUniversidad Nacional Autónoma de MéxicoUniversidad Nacional Autónoma de MéxicoUniversidad Nacional Autónoma de México Coralline red algae assimilate HCO3– to precipitate CaCO3 in their tissues in the form of calcite or aragonite. A characterization of the biomolecular content and the crystalline structure of the biomineral of coralline red algae from the Pacific coast of Mexico was performed by powder X-ray diffraction (XRD), scanning electron (SEM) and tunneling microscopy (STM), and Fourier transform infrared spectroscopy (FTIR). The preliminary conclusion drawn from the results is that this type of calcite-aragonite biomineral has a very low organic content occluded within the crystals. FTIR bands at 2945 and 2889 cm–1 indicate that the most likely organic molecules are carbohydrates; moreover, peptide bond bands (amide I ~1640 and amide II ~1540 cm–1) were not detected, suggesting that proteins are not related to mineral synthesis or their stabilization. This could be explained if the biomineral is synthesized by a biologically controlled extracellular mineralization process. The XRD study showed two main mineral phases, calcite and aragonite, with very similar structural parameters to the inorganic mineral counterparts. The crystallite shapes, seen by STM, were found as plates and needles with different sizes, between 20 and 100 nm. https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/1606CorallinalesbiomineralRietveld methodnanostructurescanning tunneling microscopy |
| spellingShingle | D Fragoso F Ramírez-Cahero A Rodríguez-Galván R Hernández-Reyes A Heredia D Rodríguez M Aguilar-Franco L Bucio VA Basiuk Characterization of the CaCO3 biomineral in coralline red algae (Corallinales) from the Pacific coast of Mexico Ciencias Marinas Corallinales biomineral Rietveld method nanostructure scanning tunneling microscopy |
| title | Characterization of the CaCO3 biomineral in coralline red algae (Corallinales) from the Pacific coast of Mexico |
| title_full | Characterization of the CaCO3 biomineral in coralline red algae (Corallinales) from the Pacific coast of Mexico |
| title_fullStr | Characterization of the CaCO3 biomineral in coralline red algae (Corallinales) from the Pacific coast of Mexico |
| title_full_unstemmed | Characterization of the CaCO3 biomineral in coralline red algae (Corallinales) from the Pacific coast of Mexico |
| title_short | Characterization of the CaCO3 biomineral in coralline red algae (Corallinales) from the Pacific coast of Mexico |
| title_sort | characterization of the caco3 biomineral in coralline red algae corallinales from the pacific coast of mexico |
| topic | Corallinales biomineral Rietveld method nanostructure scanning tunneling microscopy |
| url | https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/1606 |
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