Efecto del Tween® 80 sobre la bioprecipitación de carbonato de calcio por Bacillus cereus
Revista Colombiana de Biotecnología, ISSN: 0123-3475, Vol: 19, Issue: 1, Page: 116-123
2017
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Article Description
Resumen Se llevaron a cabo procesos de biosíntesis de carbonato de calcio, empleando una cepa de Bacillus cereus, aislada de los jardines de la Universidad Pontificia Bolivariana (Medellín, Colombia). Se evaluó el efecto disgregante del Tween® 80 a tres concentraciones: 0.00% p/v, 0.25% p/v y 0.50% p/v. Los experimentos se monitorizaron por 6 días con mediciones de pH y análisis mineralógicos a los precipitados finales por microscopía electrónica de barrido, difracción de rayos X y espectroscopia de infrarrojo con transformada de Fourier. El Tween® 80 tuvo un papel importante como desaglomerante de las estructuras de carbonato formadas por los microorganismos. Aunque los ensayos con el surfactante presentaron menor formación de precipitado, las concentraciones evaluadas no inhibieron el crecimiento bacteriano. Adicionalmente, este compuesto favoreció la formación de vaterita incrementando su proporción en comparación con la calcita (alrededor del 98%, utilizando Tween® 80 al 0.50% p/v).
Bibliographic Details
https://revistas.unal.edu.co/index.php/biotecnologia/article/view/62007; http://dx.doi.org/10.15446/rev.colomb.biote.v19n1.62007; http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0123-34752017000100116&lng=en&tlng=en; http://www.scielo.org.co/scielo.php?script=sci_abstract&pid=S0123-34752017000100116&lng=en&tlng=en; http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0123-34752017000100116; http://www.scielo.org.co/scielo.php?script=sci_abstract&pid=S0123-34752017000100116; https://dx.doi.org/10.15446/rev.colomb.biote.v19n1.62007
Universidad Nacional de Colombia
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