Physical characteristics of oily spraying liquids and droplets formed on coffee leaves and glass surfaces

Detalhes bibliográficos
Autor(a) principal: Decaro Junior,Sergio T.
Data de Publicação: 2015
Outros Autores: Ferreira,Marcelo da C., Lasmar,Olinto
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Engenharia Agrícola
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162015000300588
Resumo: The physical characteristics of a spray liquid are important in getting a good droplet formation and control efficiency over a particular target. As a function of these characteristics, it is possible to decipher which is the best adjuvant based on the respective concentration used during the spray. Therefore, ten spraying liquids were prepared, which varied in concentrations of pesticide lufenuron + profenofos, mineral oil, water and manganese sulfate. Pendant droplets formed from these mixtures were measured to examine their impact on surface tension. Droplets were applied to the surface of coffee leaves and the surface tension, contact angle formed and the leaf area wetted by the droplet, were measured. A smooth glass surface was taken as a comparative to the coffee leaves. The highest concentrations of oil resulted in lower surface tension, smaller contact angles of droplets on leaf surfaces and larger areas wetted by the droplets. Both surfaces showed hydrophilic behavior.
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spelling Physical characteristics of oily spraying liquids and droplets formed on coffee leaves and glass surfacessurface tensioncontact anglewetted areaoilThe physical characteristics of a spray liquid are important in getting a good droplet formation and control efficiency over a particular target. As a function of these characteristics, it is possible to decipher which is the best adjuvant based on the respective concentration used during the spray. Therefore, ten spraying liquids were prepared, which varied in concentrations of pesticide lufenuron + profenofos, mineral oil, water and manganese sulfate. Pendant droplets formed from these mixtures were measured to examine their impact on surface tension. Droplets were applied to the surface of coffee leaves and the surface tension, contact angle formed and the leaf area wetted by the droplet, were measured. A smooth glass surface was taken as a comparative to the coffee leaves. The highest concentrations of oil resulted in lower surface tension, smaller contact angles of droplets on leaf surfaces and larger areas wetted by the droplets. Both surfaces showed hydrophilic behavior.Associação Brasileira de Engenharia Agrícola2015-06-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162015000300588Engenharia Agrícola v.35 n.3 2015reponame:Engenharia Agrícolainstname:Associação Brasileira de Engenharia Agrícola (SBEA)instacron:SBEA10.1590/1809-4430-Eng.Agric.v35n3p588-600/2015info:eu-repo/semantics/openAccessDecaro Junior,Sergio T.Ferreira,Marcelo da C.Lasmar,Olintoeng2016-07-20T00:00:00Zoai:scielo:S0100-69162015000300588Revistahttp://www.engenhariaagricola.org.br/ORGhttps://old.scielo.br/oai/scielo-oai.phprevistasbea@sbea.org.br||sbea@sbea.org.br1809-44300100-6916opendoar:2016-07-20T00:00Engenharia Agrícola - Associação Brasileira de Engenharia Agrícola (SBEA)false
dc.title.none.fl_str_mv Physical characteristics of oily spraying liquids and droplets formed on coffee leaves and glass surfaces
title Physical characteristics of oily spraying liquids and droplets formed on coffee leaves and glass surfaces
spellingShingle Physical characteristics of oily spraying liquids and droplets formed on coffee leaves and glass surfaces
Decaro Junior,Sergio T.
surface tension
contact angle
wetted area
oil
title_short Physical characteristics of oily spraying liquids and droplets formed on coffee leaves and glass surfaces
title_full Physical characteristics of oily spraying liquids and droplets formed on coffee leaves and glass surfaces
title_fullStr Physical characteristics of oily spraying liquids and droplets formed on coffee leaves and glass surfaces
title_full_unstemmed Physical characteristics of oily spraying liquids and droplets formed on coffee leaves and glass surfaces
title_sort Physical characteristics of oily spraying liquids and droplets formed on coffee leaves and glass surfaces
author Decaro Junior,Sergio T.
author_facet Decaro Junior,Sergio T.
Ferreira,Marcelo da C.
Lasmar,Olinto
author_role author
author2 Ferreira,Marcelo da C.
Lasmar,Olinto
author2_role author
author
dc.contributor.author.fl_str_mv Decaro Junior,Sergio T.
Ferreira,Marcelo da C.
Lasmar,Olinto
dc.subject.por.fl_str_mv surface tension
contact angle
wetted area
oil
topic surface tension
contact angle
wetted area
oil
description The physical characteristics of a spray liquid are important in getting a good droplet formation and control efficiency over a particular target. As a function of these characteristics, it is possible to decipher which is the best adjuvant based on the respective concentration used during the spray. Therefore, ten spraying liquids were prepared, which varied in concentrations of pesticide lufenuron + profenofos, mineral oil, water and manganese sulfate. Pendant droplets formed from these mixtures were measured to examine their impact on surface tension. Droplets were applied to the surface of coffee leaves and the surface tension, contact angle formed and the leaf area wetted by the droplet, were measured. A smooth glass surface was taken as a comparative to the coffee leaves. The highest concentrations of oil resulted in lower surface tension, smaller contact angles of droplets on leaf surfaces and larger areas wetted by the droplets. Both surfaces showed hydrophilic behavior.
publishDate 2015
dc.date.none.fl_str_mv 2015-06-01
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162015000300588
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162015000300588
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/1809-4430-Eng.Agric.v35n3p588-600/2015
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv text/html
dc.publisher.none.fl_str_mv Associação Brasileira de Engenharia Agrícola
publisher.none.fl_str_mv Associação Brasileira de Engenharia Agrícola
dc.source.none.fl_str_mv Engenharia Agrícola v.35 n.3 2015
reponame:Engenharia Agrícola
instname:Associação Brasileira de Engenharia Agrícola (SBEA)
instacron:SBEA
instname_str Associação Brasileira de Engenharia Agrícola (SBEA)
instacron_str SBEA
institution SBEA
reponame_str Engenharia Agrícola
collection Engenharia Agrícola
repository.name.fl_str_mv Engenharia Agrícola - Associação Brasileira de Engenharia Agrícola (SBEA)
repository.mail.fl_str_mv revistasbea@sbea.org.br||sbea@sbea.org.br
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