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Acoustic streaming, the "small invention" of cyanobacteria?

2010Artigo científico Acesso aberto
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dc.contributor.authorKoiller, Jair
dc.contributor.authorEhlers, Kurt M.
dc.contributor.authorChalub, Fábio Augusto da Costa Carvalho
dc.contributor.institutionDM - Departamento de Matemática
dc.contributor.pblCSIC - Consejo Superior de Investigaciones Cientificas
dc.date.accessioned2017-10-30T23:00:22Z
dc.date.available2017-10-30T23:00:22Z
dc.date.issued2010
dc.description.abstractMicro-engineering pumping devices without mechanical parts appeared "way back" in the early 1990's. The working principle is acoustic streaming. Has Nature "rediscovered" this invention 2.7 Gyr ago? Strands of marine cyanobacteria Synechococcus swim 25 diameters per second without any visible means of propulsion. We show that nanoscale amplitude vibrations on the S-layer (a crystalline shell outside the outer membrane present in motile strands) and frequencies of the order of 0.5-1.5 MHz (achievable by molecular motors), could produce steady streaming slip velocities outside a (Stokes) boundary layer. Inside this boundary layer the flow pattern is rotational (hence biologically advantageous). In addition to this purported "swimming by singing", we also indicate other possible instantiations of acoustic streaming. Sir James Lighthill has proposed that acoustic streaming occurs in the cochlear dynamics, and new findings on the outer hair cell membranes are suggestive. Other possibilities are membrane vibrations of yeast cells, enhancing its chemistry (beer and bread, keep it up, yeast!), squirming motion of red blood cells along capillaries, and fluid pumping by silicated diatoms.en
dc.description.versionpublishersversion
dc.description.versionpublished
dc.format.extent518847
dc.identifier.doi10.3989/arbor.2010.746n1256
dc.identifier.issn0210-1963
dc.identifier.otherPURE: 187822
dc.identifier.otherPURE UUID: 60135dbc-d711-427c-a970-42ad54d26e7a
dc.identifier.otherresearchoutputwizard: 19578
dc.identifier.otherWOS: 000288228300007
dc.identifier.otherScopus: 79951760460
dc.identifier.urihttp://hdl.handle.net/10362/24751
dc.language.isoeng
dc.peerreviewedyes
dc.subjectwaves
dc.subjectgliding
dc.subjectvisualization
dc.subjectAcoustic
dc.subjects-layers
dc.subjectSynechococcus
dc.subjectsynechococcus
dc.subjectouter
dc.subjectcell
dc.subjectdiatom
dc.subjectmarine
dc.subjectultrasound
dc.subjectmembranes
dc.subjectstreaming
dc.subjecthair
dc.subjectpiezoelectricity
dc.subjectbacterial
dc.subjectcyanobacteria
dc.subjectcochlear
dc.subjectnanotechnology
dc.subjectmotility
dc.subjectamplifier
dc.subjectAcoustic streaming
dc.subjectCell membranes
dc.subjectCyanobacteria
dc.subjectPiezoelectricity
dc.subjectSynechococcus
dc.titleAcoustic streaming, the "small invention" of cyanobacteria?en
dc.typejournal article
degois.publication.firstPage1089
degois.publication.issue746
degois.publication.lastPage1115
degois.publication.titleArbor
degois.publication.volume186
dspace.entity.typePublication
rcaap.rightsopenAccess

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