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dc.contributor.authorDas, Debasish
dc.contributor.authorLauga, Eric Lauga
dc.date.accessioned2018-11-20T00:31:19Z
dc.date.available2018-11-20T00:31:19Z
dc.date.issued2018-07-25
dc.identifier.issn1744-683X
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/285470
dc.description.abstractThe rotary motor of bacteria is a natural nano-technological marvel that enables cell locomotion by powering the rotation of semi-rigid helical flagellar filaments in fluid environments. It is well known that the motor operates essentially at constant torque in counter-clockwise direction but past work have reported a large range of values of this torque. Focusing on Escherichia coli cells that are swimming and cells that are stuck on a glass surface for which all geometrical and environmental parameters are known (N. C. Darnton et al., J. Bacteriol., 2007, 189, 1756-1764), we use two validated numerical methods to compute the value of the motor torque consistent with experiments. Specifically, we use (and compare) a numerical method based on the boundary integral representation of Stokes flow and also develop a hybrid method combining boundary element and slender body theory to model the cell body and flagellar filament, respectively. Using measured rotation speed of the motor, our computations predict a value of the motor torque in the range 440 pN nm to 829 pN nm, depending critically on the distance between the flagellar filaments and the nearby surface.
dc.format.mediumPrint
dc.languageeng
dc.publisherRoyal Society of Chemistry (RSC)
dc.subjectEscherichia coli
dc.subjectGlass
dc.subjectMovement
dc.subjectSwimming
dc.subjectTorque
dc.subjectModels, Biological
dc.titleComputing the motor torque of Escherichia coli.
dc.typeArticle
prism.endingPage5967
prism.issueIdentifier29
prism.publicationDate2018
prism.publicationNameSoft Matter
prism.startingPage5955
prism.volume14
dc.identifier.doi10.17863/CAM.32828
dcterms.dateAccepted2018-06-02
rioxxterms.versionofrecord10.1039/c8sm00536b
rioxxterms.licenseref.urihttp://www.rioxx.net/licenses/all-rights-reserved
rioxxterms.licenseref.startdate2018-07
dc.contributor.orcidLauga, Eric Lauga [0000-0002-8916-2545]
dc.identifier.eissn1744-6848
dc.publisher.urlhttp://dx.doi.org/10.1039/c8sm00536b
rioxxterms.typeJournal Article/Review
pubs.funder-project-idEuropean Research Council (682754)
cam.issuedOnline2018
rioxxterms.freetoread.startdate2019-07-31


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