A Study on Characterization of EPS and Media Optimization for Bacterial Calcium Carbonate Precipitation

Priya, J. Neena; Kannan, M. Bobby; Priyanka, P.; Mary, Stéphane

doi:10.20546/ijcmas.2016.504.067

Cited by 1 publication

(1 citation statement)

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“…Finally, B. subtilis produced CaCO 3 minerals by INFBM; where EPS, membrane, and cell wall structures act as nucleation sites (Perito et al 2014 ; Priya et al 2016 ). Specifically, the metabolism of fatty acids plays a key role in biomineralization process (Perito et al 2000 ; Barabesi et al 2007 ), such as dipicolinic acid (Marvasi et al 2017 ).…”

Section: Introductionmentioning

confidence: 99%

Novel method to achieve crystallinity of calcite by Bacillus subtilis in coupled and non-coupled calcium-carbon sources

et al. 2020

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Bacteria mineralization is a promising biotechnological approach to apply in biomaterials development. In this investigation, we demonstrate that Bacillus subtilis 168 induces and influences CaCO3 composites precipitation. Crystals were formed in calcium-carbon non-coupled (glycerol + CaCl2, GLY; or glucose + CaCl2, GLC) and coupled (calcium lactate, LAC; or calcium acetate, ACE) agar-sources, only maintaining the same Ca2+ concentration. The mineralized colonies showed variations in morphology, size, and crystallinity form properties. The crystals presented spherulitic growth in all conditions, and botryoidal shapes in GLC one. Birefringence and diffraction patterns confirmed that all biogenic carbonate crystals (BCC) were organized as calcite. The CaCO3 in BCC was organized as calcite, amorphous calcium carbon (ACC) and organic matter (OM) of biofilm; all of them with relative abundance related to bacteria growth condition. BCC-GLY presented greatest OM composition, while BCC-ACE highest CaCO3 content. Nucleation mechanism and OM content impacted in BCC crystallinity.

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Section: Introductionmentioning

confidence: 99%