Issue 37, 2021
From the journal:

Soft Matter

Bacterial aggregation assisted by anionic surfactant and calcium ions†

Narendra K. Dewangan,a   Nhi Tran,a   Jing Wang-Reeda  and  Jacinta C. Conrad ORCID logo *a  

* Corresponding authors

a William A. Brookshire Department of Chemical and Biomolecular Engineering, University of Houston, Houston, TX, USA
E-mail: jcconrad@uh.edu

Abstract

We identify factors leading to aggregation of bacteria in the presence of a surfactant using absorbance and microscopy. Two marine bacteria, Marinobacter hydrocarbonoclasticus SP17 and Halomonas titanicae Bead 10BA, formed aggregates of a broad size distribution in synthetic sea water in the presence of an anionic surfactant, dioctyl sodium sulfosuccinate (DOSS). Both DOSS at high concentrations and calcium ions were necessary for aggregate formation, but DOSS micelles were not required for aggregation. Addition of proteinase K but not DNase1 eliminated aggregate formation over two hours. Finally, swimming motility also enhanced aggregate formation.

Graphical abstract: Bacterial aggregation assisted by anionic surfactant and calcium ions

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Article information

DOI
https://doi.org/10.1039/D1SM00479D
Article type
Paper
Submitted
30 Mar 2021
Accepted
20 Aug 2021
First published
25 Aug 2021

Soft Matter, 2021,17, 8474-8482

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Bacterial aggregation assisted by anionic surfactant and calcium ions

N. K. Dewangan, N. Tran, J. Wang-Reed and J. C. Conrad, Soft Matter, 2021, 17, 8474 DOI: 10.1039/D1SM00479D

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