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Rotational tumbling of escherichia coli aggregates under shear

2016Journal article Open access
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dc.contributor.authorPatricio, Pedro
dc.contributor.authorAlmeida, Pedro L.
dc.contributor.authorSobral, G.
dc.contributor.authorFranco J. M., Rita
dc.contributor.authorLeal, Catarina R.
dc.date.accessioned2017-05-24T13:48:53Z
dc.date.available2017-05-24T13:48:53Z
dc.date.issued2016
dc.description.abstractGrowing living cultures of Escherichia coli bacteria are investigated using real-time in situ rheology and rheoimaging measurements. In the early stages of growth (lag phase) and when subjected to a constant stationary shear, the viscosity slowly increases with the cell's population. As the bacteria reach the exponential phase of growth, the viscosity increases rapidly, with sudden and temporary abrupt decreases and recoveries. At a certain stage, corresponding grossly to the late phase of growth, when the population stabilizes, the viscosity also keeps its maximum constant value, with drops and recoveries, for a long period of time. This complex rheological behavior, which is observed to be shear strain dependent, is a consequence of two coupled effects: the cell density continuous increase and its changing interacting properties. Particular attention is given to the late phase of growth of E. coli populations under shear. Rheoimaging measurements reveal, near the static plate, a rotational motion of E. coli aggregates, collectively tumbling and flowing in the shear direction. This behavior is interpreted in the light of a simple theoretical approach based on simple rigid body mechanics.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationPORTELA, R.; [et al] – Rotational tumbling of Escherichia coli aggregates under shear. Physical Review E. ISSN: 1381-1169. Vol. 94, N.º 6 (2016), pp.1-6.pt_PT
dc.identifier.doi10.1103/PhysRevE.94.062402pt_PT
dc.identifier.issn1381-1169
dc.identifier.urihttp://hdl.handle.net/10400.21/7061
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherElsevierpt_PT
dc.relation.publisherversionhttps://arxiv.org/pdf/1610.09308.pdpt_PT
dc.titleRotational tumbling of escherichia coli aggregates under shearpt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage1pt_PT
oaire.citation.issue6pt_PT
oaire.citation.issue6
oaire.citation.titleJournal of Molecular Catalysis A: Chemicalpt_PT
oaire.citation.volume94pt_PT
person.familyNamePatricio
person.familyNameMarques de Almeida
person.familyNameMarques Mendes Almeida da Rosa Leal
person.givenNamePedro
person.givenNamePedro
person.givenNameCatarina
person.identifierA-2814-2009
person.identifier.ciencia-idC616-BA77-E9C9
person.identifier.ciencia-id0218-71B2-2DE0
person.identifier.ciencia-idAF15-486E-BB15
person.identifier.orcid0000-0002-9050-9956
person.identifier.orcid0000-0001-7356-8455
person.identifier.orcid0000-0001-5871-4936
person.identifier.ridA-2750-2009
person.identifier.ridB-4356-2009
person.identifier.scopus-author-id57190384213
person.identifier.scopus-author-id7005379280
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublication11a2a1d5-8165-475a-8a54-e32bd8e8ce4e
relation.isAuthorOfPublication429b6d71-328e-42b3-8151-15493de249b8
relation.isAuthorOfPublication4db8990d-5eb1-4515-ae7a-68873cf776a5
relation.isAuthorOfPublication.latestForDiscovery11a2a1d5-8165-475a-8a54-e32bd8e8ce4e

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