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Bacterias de suelo: transporte en medios porosos bidimensionales

Authors: Montagna, S.; Lodeiro, Aníbal Roberto; Marconi, Verónica Iris;

Bacterias de suelo: transporte en medios porosos bidimensionales

Abstract

Bradyrhizobium diazoefficienses una bacteria de suelo muy utilizada como inoculante para la fijación simbiótica de nitrógeno en soja. Para que se produzca la simbiosis, estas bacterias deben desplazarse hasta los sitios de infección en las raíces, por lo cual la comprensión de su movilidad en el suelo es muy relevante. En este trabajo se presenta un estudio numérico de las propiedades de transporte de poblaciones bacterianas con dinámica de Langevin, en medios porosos bidimensionales, con obstáculos circulares. Se estudia el coeficiente de difusión traslacional variando la densidad y el radio de los defectos. Se encontró una dependencia de la difusión con el radio de los defectos, a mayor radio, menor difusión a una misma densidad de defectos. Estos resultados ayudan a la comprensión de la difusión de bacterias en medios porosos y puede contribuir al mejor diseño de dispositivos de microfluídica para su estudio en el laboratorio.

Bradyrhizobium diazoefficiensis a soil bacteria used as inoculant for fixing nitrogen in symbiosis withsoybean. Bacteria should move close to the roots for infection. Therefore, its motility properties into soil is crucial to be understood. In this work we present a numerical study of bacteria transport properties in 2D porous media using Langevin dynamics. We use solid disks as obstacles. Translational diffusion coefficientis studied as a function of obstacles density and radius. At constant density, we find that diffusion decays while radius increases. These results may help to understand bacteria diffusion in porous media and to improve the design of microfluidics devices for studies in laboratory.

Fil: Lodeiro, A. R.. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Biotecnología y Biología Molecular (UNLP-IBBM-CONICET). Buenos Aires. Argentina

Fil: Marconi, Verónica Iris. Universidad Nacional de Córdoba. Facultad de Matemática, Astronomía, Física y Computación (UNC-FAMAF-CONICET). Córdoba. Argentina

Fil: Montagna, S.. Universidad Nacional de Córdoba. Facultad de Matemática, Astronomía, Física y Computación (UNC-FAMAF-CONICET). Córdoba. Argentina

Country
Argentina
Keywords

BIOTECNOLOGÍA, Biotecnología, Bacteria, TRANSPORTE, Poros, Física, Transport, BIOTECNOLOGIA, Transporte, 530, TRANSPORT, Porous, POROS, BACTERIA, https://purl.org/becyt/ford/1.3, POROUS, BIOTECHNOLOGY, https://purl.org/becyt/ford/1, Biotechnology

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
Average
Average
Green