Droplet bubbling evaporatively cools a blowfly
Autor(a) principal: | |
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Data de Publicação: | 2018 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1038/s41598-018-23670-2 http://hdl.handle.net/11449/179802 |
Resumo: | Terrestrial animals often use evaporative cooling to lower body temperature. Evaporation can occur from humid body surfaces or from fluids interfaced to the environment through a number of different mechanisms, such as sweating or panting. In Diptera, some flies move tidally a droplet of fluid out and then back in the buccopharyngeal cavity for a repeated number of cycles before eventually ingesting it. This is referred to as the bubbling behaviour. The droplet fluid consists of a mix of liquids from the ingested food, enzymes from the salivary glands, and antimicrobials, associated to the crop organ system, with evidence pointing to a role in liquid meal dehydration. Herein, we demonstrate that the bubbling behaviour also serves as an effective thermoregulatory mechanism to lower body temperature by means of evaporative cooling. In the blowfly, Chrysomya megacephala, infrared imaging revealed that as the droplet is extruded, evaporation lowers the fluids temperature, which, upon its re-ingestion, lowers the blowfly's body temperature. This effect is most prominent at the cephalic region, less in the thorax, and then in the abdomen. Bubbling frequency increases with ambient temperature, while its cooling efficiency decreases at high air humidities. Heat transfer calculations show that droplet cooling depends on a special heat-exchange dynamic, which result in the exponential activation of the cooling effect. |
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Droplet bubbling evaporatively cools a blowflyTerrestrial animals often use evaporative cooling to lower body temperature. Evaporation can occur from humid body surfaces or from fluids interfaced to the environment through a number of different mechanisms, such as sweating or panting. In Diptera, some flies move tidally a droplet of fluid out and then back in the buccopharyngeal cavity for a repeated number of cycles before eventually ingesting it. This is referred to as the bubbling behaviour. The droplet fluid consists of a mix of liquids from the ingested food, enzymes from the salivary glands, and antimicrobials, associated to the crop organ system, with evidence pointing to a role in liquid meal dehydration. Herein, we demonstrate that the bubbling behaviour also serves as an effective thermoregulatory mechanism to lower body temperature by means of evaporative cooling. In the blowfly, Chrysomya megacephala, infrared imaging revealed that as the droplet is extruded, evaporation lowers the fluids temperature, which, upon its re-ingestion, lowers the blowfly's body temperature. This effect is most prominent at the cephalic region, less in the thorax, and then in the abdomen. Bubbling frequency increases with ambient temperature, while its cooling efficiency decreases at high air humidities. Heat transfer calculations show that droplet cooling depends on a special heat-exchange dynamic, which result in the exponential activation of the cooling effect.Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Department of Physics and Interdisciplinary Science São Carlos Institute of Physics (IFSC) University of São Paulo (USP)Departament of Zoology Institute of Biosciences (IB) São Paulo State University (UNESP)Departament of Zoology Institute of Biosciences (IB) São Paulo State University (UNESP)FAPESP: 2007/05080-1FAPESP: 2013/04190-9FAPESP: 2013/20627-8FAPESP: 2017/17722-0CNPq: 306811/2015-4CNPq: 308734/2016-5Universidade de São Paulo (USP)Universidade Estadual Paulista (Unesp)Gomes, GuilhermeKöberle, RolandVon Zuben, Claudio J. [UNESP]Andrade, Denis V. [UNESP]2018-12-11T17:36:49Z2018-12-11T17:36:49Z2018-12-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://dx.doi.org/10.1038/s41598-018-23670-2Scientific Reports, v. 8, n. 1, 2018.2045-2322http://hdl.handle.net/11449/17980210.1038/s41598-018-23670-22-s2.0-850459320182-s2.0-85045932018.pdf75628510167953810000-0002-9622-3254Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengScientific Reports1,533info:eu-repo/semantics/openAccess2023-12-11T06:15:43Zoai:repositorio.unesp.br:11449/179802Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T20:02:12.743075Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Droplet bubbling evaporatively cools a blowfly |
title |
Droplet bubbling evaporatively cools a blowfly |
spellingShingle |
Droplet bubbling evaporatively cools a blowfly Gomes, Guilherme |
title_short |
Droplet bubbling evaporatively cools a blowfly |
title_full |
Droplet bubbling evaporatively cools a blowfly |
title_fullStr |
Droplet bubbling evaporatively cools a blowfly |
title_full_unstemmed |
Droplet bubbling evaporatively cools a blowfly |
title_sort |
Droplet bubbling evaporatively cools a blowfly |
author |
Gomes, Guilherme |
author_facet |
Gomes, Guilherme Köberle, Roland Von Zuben, Claudio J. [UNESP] Andrade, Denis V. [UNESP] |
author_role |
author |
author2 |
Köberle, Roland Von Zuben, Claudio J. [UNESP] Andrade, Denis V. [UNESP] |
author2_role |
author author author |
dc.contributor.none.fl_str_mv |
Universidade de São Paulo (USP) Universidade Estadual Paulista (Unesp) |
dc.contributor.author.fl_str_mv |
Gomes, Guilherme Köberle, Roland Von Zuben, Claudio J. [UNESP] Andrade, Denis V. [UNESP] |
description |
Terrestrial animals often use evaporative cooling to lower body temperature. Evaporation can occur from humid body surfaces or from fluids interfaced to the environment through a number of different mechanisms, such as sweating or panting. In Diptera, some flies move tidally a droplet of fluid out and then back in the buccopharyngeal cavity for a repeated number of cycles before eventually ingesting it. This is referred to as the bubbling behaviour. The droplet fluid consists of a mix of liquids from the ingested food, enzymes from the salivary glands, and antimicrobials, associated to the crop organ system, with evidence pointing to a role in liquid meal dehydration. Herein, we demonstrate that the bubbling behaviour also serves as an effective thermoregulatory mechanism to lower body temperature by means of evaporative cooling. In the blowfly, Chrysomya megacephala, infrared imaging revealed that as the droplet is extruded, evaporation lowers the fluids temperature, which, upon its re-ingestion, lowers the blowfly's body temperature. This effect is most prominent at the cephalic region, less in the thorax, and then in the abdomen. Bubbling frequency increases with ambient temperature, while its cooling efficiency decreases at high air humidities. Heat transfer calculations show that droplet cooling depends on a special heat-exchange dynamic, which result in the exponential activation of the cooling effect. |
publishDate |
2018 |
dc.date.none.fl_str_mv |
2018-12-11T17:36:49Z 2018-12-11T17:36:49Z 2018-12-01 |
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://dx.doi.org/10.1038/s41598-018-23670-2 Scientific Reports, v. 8, n. 1, 2018. 2045-2322 http://hdl.handle.net/11449/179802 10.1038/s41598-018-23670-2 2-s2.0-85045932018 2-s2.0-85045932018.pdf 7562851016795381 0000-0002-9622-3254 |
url |
http://dx.doi.org/10.1038/s41598-018-23670-2 http://hdl.handle.net/11449/179802 |
identifier_str_mv |
Scientific Reports, v. 8, n. 1, 2018. 2045-2322 10.1038/s41598-018-23670-2 2-s2.0-85045932018 2-s2.0-85045932018.pdf 7562851016795381 0000-0002-9622-3254 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Scientific Reports 1,533 |
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 |
Scopus reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
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1808129153503854592 |