Acoustic streaming, the "small invention" of cyanobacteria?
Autor(a) principal: | |
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Data de Publicação: | 2010 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/10362/24751 |
Resumo: | Micro-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. |
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Acoustic streaming, the "small invention" of cyanobacteria?wavesglidingvisualizationAcoustics-layersSynechococcussynechococcusoutercelldiatommarineultrasoundmembranesstreaminghairpiezoelectricitybacterialcyanobacteriacochlearnanotechnologymotilityamplifierAcoustic streamingCell membranesCyanobacteriaPiezoelectricitySynechococcusMicro-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.DM - Departamento de MatemáticaRUNKoiller, JairEhlers, Kurt M.Chalub, Fábio Augusto da Costa Carvalho2017-10-30T23:00:22Z20102010-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10362/24751eng0210-1963PURE: 187822https://doi.org/10.3989/arbor.2010.746n1256info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2024-03-11T04:12:54Zoai:run.unl.pt:10362/24751Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T03:28:07.110480Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse |
dc.title.none.fl_str_mv |
Acoustic streaming, the "small invention" of cyanobacteria? |
title |
Acoustic streaming, the "small invention" of cyanobacteria? |
spellingShingle |
Acoustic streaming, the "small invention" of cyanobacteria? Koiller, Jair waves gliding visualization Acoustic s-layers Synechococcus synechococcus outer cell diatom marine ultrasound membranes streaming hair piezoelectricity bacterial cyanobacteria cochlear nanotechnology motility amplifier Acoustic streaming Cell membranes Cyanobacteria Piezoelectricity Synechococcus |
title_short |
Acoustic streaming, the "small invention" of cyanobacteria? |
title_full |
Acoustic streaming, the "small invention" of cyanobacteria? |
title_fullStr |
Acoustic streaming, the "small invention" of cyanobacteria? |
title_full_unstemmed |
Acoustic streaming, the "small invention" of cyanobacteria? |
title_sort |
Acoustic streaming, the "small invention" of cyanobacteria? |
author |
Koiller, Jair |
author_facet |
Koiller, Jair Ehlers, Kurt M. Chalub, Fábio Augusto da Costa Carvalho |
author_role |
author |
author2 |
Ehlers, Kurt M. Chalub, Fábio Augusto da Costa Carvalho |
author2_role |
author author |
dc.contributor.none.fl_str_mv |
DM - Departamento de Matemática RUN |
dc.contributor.author.fl_str_mv |
Koiller, Jair Ehlers, Kurt M. Chalub, Fábio Augusto da Costa Carvalho |
dc.subject.por.fl_str_mv |
waves gliding visualization Acoustic s-layers Synechococcus synechococcus outer cell diatom marine ultrasound membranes streaming hair piezoelectricity bacterial cyanobacteria cochlear nanotechnology motility amplifier Acoustic streaming Cell membranes Cyanobacteria Piezoelectricity Synechococcus |
topic |
waves gliding visualization Acoustic s-layers Synechococcus synechococcus outer cell diatom marine ultrasound membranes streaming hair piezoelectricity bacterial cyanobacteria cochlear nanotechnology motility amplifier Acoustic streaming Cell membranes Cyanobacteria Piezoelectricity Synechococcus |
description |
Micro-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. |
publishDate |
2010 |
dc.date.none.fl_str_mv |
2010 2010-01-01T00:00:00Z 2017-10-30T23:00:22Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10362/24751 |
url |
http://hdl.handle.net/10362/24751 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
0210-1963 PURE: 187822 https://doi.org/10.3989/arbor.2010.746n1256 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.source.none.fl_str_mv |
reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
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Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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RCAAP |
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RCAAP |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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1799137907971194880 |