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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

A rheological approach to identify efficient biopolymer producing bacteria

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Author(s):
Malvar, Sara [1] ; Cardoso, Leticia O. B. [2, 3] ; Karolski, Bruno [3] ; Perpetuo, Elen A. [4, 3] ; Carmo, Bruno S. [1] ; Meneghini, Julio R. [1]
Total Authors: 6
Affiliation:
[1] Univ Sao Paulo, Dept Mech Engn, Escola Politecn, Av Prof Mello Moraes 2231, Sao Paulo, SP - Brazil
[2] Univ Sao Paulo, Interunit Program Biotechnol, Sao Paulo, SP - Brazil
[3] Univ Sao Paulo, Environm Res & Educ Ctr CEPEMA, Escola Politecn, Cubatao, SP - Brazil
[4] Univ Fed Sao Paulo, Inst Marine Sci, Santos, SP - Brazil
Total Affiliations: 4
Document type: Journal article
Source: Biotechnology and Bioengineering; v. 118, n. 2, p. 622-632, FEB 2021.
Web of Science Citations: 0
Abstract

This study investigates the relationship between collective motion and propulsion of bacterial consortia and their biopolymer production efficiency. Rheological tests were conducted for suspensions of two different methanotrophic bacterial consortia obtained after enrichment of sediment samples from mangrove sites in Brazil. We considered the linear viscoelasticity region and analyzed the values of storage and loss moduli as functions of days of cultivation, for different values of the volume fraction. The suspensions' rheological behaviors reflected the bacterial growth stage. We found that the formation of structures over time in some types of consortia can hinder the movement of bacteria in the search for nutrients. The change in complex viscosity of the two consortia followed a different and rich behavior that appears to be closely related to their capacity to capture methane. Our analysis showed a possible correlation between collective motion, viscosity reduction, and biopolymer production. The pieces of evidence from this study suggest that the efficiency of bacterial motion is directly related to biopolymer production, and this could facilitate the process of identifying the best consortium of biopolymer producing bacteria. (AU)

FAPESP's process: 19/15754-7 - Rheological study of suspensions of microorganisms biopolymer producers
Grantee:Sara Malvar Mauá
Support Opportunities: Scholarships in Brazil - Post-Doctoral
FAPESP's process: 16/14337-5 - Hydrodynamics of Living Fluids in Microflows
Grantee:Sara Malvar Mauá
Support Opportunities: Scholarships in Brazil - Doctorate
FAPESP's process: 18/22790-7 - Evaluation of the potential of the production of biopolymers by methylotrophic bacteria
Grantee:Elen Aquino Perpetuo
Support Opportunities: BIOTA-FAPESP Program - Regular Research Grants
FAPESP's process: 14/50279-4 - Brasil Research Centre for Gas Innovation
Grantee:Julio Romano Meneghini
Support Opportunities: Research Grants - Research Centers in Engineering Program