Isolation and characterization of a microorganism that produces biosurfactants in corn steep water
IDENTIFICADOR UNIVERSAL: http://hdl.handle.net/11093/3748
VERSIÓN EDITADA: https://www.tandfonline.com/doi/full/10.1080/19476337.2019.1607909
MATERIA UNESCO: 3303 Ingeniería y Tecnología Químicas ; 3309 Tecnología de Los Alimentos ; 3309.13 Conservación de Alimentos
TIPO DE DOCUMENTO: article
In this work a Bacillus strain with capacity to produce biosurfactants was isolated from commercial corn steep water (CSW). The identification of this bacterium was based on phenotypic characteristics. This is a Gram-positive Bacillus, macroscopically catalase-negative, that possesses high mobility and forms terminal endospore. The colonies formed by the isolated Bacillus strain are characterized by a creaming, dull and glistening phenotype with a small point-like elevation in the center. Regarding its antimicrobial activity, the isolated Bacillus strain was effective against Candida albicans and Staphylococcus aureus observing, in the presence of pathogenic strains, a phenotype dissociation, switching the colonies from a whitish to yellowish pigmentation. The isolated microorganism, contrarily to other Bacillus strains, has the ability to produce extracellular and cell-bound biosurfactants. The analyses revealed that both biosurfactant extracts are similar to the lipopeptide biosurfactant produced by Bacillus subtilis.
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