Microwave and convective air on drying of Araucaria angustifolia seeds
Autor(a) principal: | |
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Data de Publicação: | 2021 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Semina. Ciências Agrárias (Online) |
Texto Completo: | https://ojs.uel.br/revistas/uel/index.php/semagrarias/article/view/41423 |
Resumo: | Microwave drying has shorter processing times compared with convection drying, which results in high-quality products and reduced energy consumption. The objective of this study is to evaluate the drying process of Araucaria angustifolia seeds using hot air at atmospheric pressure by applying microwaves (300 W and 500 W), and comparing them with the conventional drying process using hot air (80 °C). The drying time using hot air with microwaves at 500 W and 300 W was reduced by 83.33% and 73.89%, respectively, compared with conventional drying. The drying process occurred in the transient regime, with the predominance of a period of decreasing drying rate. The internal temperature of Araucaria seeds increased with the exposure time to the drying process, whereas the moisture content decreased. This tendency was greater for seeds subjected to electromagnetic fields, especially those exposed to higher power. The total phenolic compounds (TPCs) were lower by microwave drying when compared with conventional drying. The TPC loss was influenced by the internal temperature of the seed. Alternative methods to promote the increased retention of phenolic compounds during the drying process include decreasing the microwave power before the end of drying, combining traditional microwave-associated drying methods, and controlling the applied microwave power. |
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Semina. Ciências Agrárias (Online) |
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Microwave and convective air on drying of Araucaria angustifolia seedsUtilização de micro-ondas e ar quente na secagem de sementes de Araucaria angustifoliaPhenolic compoundsPower.ProcessSeed.Compostos fenólicosPotênciaProcessoSementes.Microwave drying has shorter processing times compared with convection drying, which results in high-quality products and reduced energy consumption. The objective of this study is to evaluate the drying process of Araucaria angustifolia seeds using hot air at atmospheric pressure by applying microwaves (300 W and 500 W), and comparing them with the conventional drying process using hot air (80 °C). The drying time using hot air with microwaves at 500 W and 300 W was reduced by 83.33% and 73.89%, respectively, compared with conventional drying. The drying process occurred in the transient regime, with the predominance of a period of decreasing drying rate. The internal temperature of Araucaria seeds increased with the exposure time to the drying process, whereas the moisture content decreased. This tendency was greater for seeds subjected to electromagnetic fields, especially those exposed to higher power. The total phenolic compounds (TPCs) were lower by microwave drying when compared with conventional drying. The TPC loss was influenced by the internal temperature of the seed. Alternative methods to promote the increased retention of phenolic compounds during the drying process include decreasing the microwave power before the end of drying, combining traditional microwave-associated drying methods, and controlling the applied microwave power.Comparados aos secadores por convecção, os secadores dielétricos têm tempos de secagem mais curtos, proporcionando produtos de melhor qualidade e consequentemente menor consumo de energia. O objetivo deste estudo foi avaliar os processos de secagem de sementes de Araucária angustifólia usando ar quente à pressão atmosférica, aplicando micro-ondas (300 W e 500 W) e compará-los ao processo de secagem convencional com ar quente (80 ºC). O tempo de processo de secagem usando ar quente com micro-ondas foi reduzido em 83,33% na potência de 500 W e 73,89% a 300 W, quando comparado à secagem convencional. Os processos de secagem ocorreram no regime transiente, com predominância do período de taxa decrescente. Observou-se que os valores da temperatura interna aumentaram com o tempo de exposição do material ao processo, enquanto a umidade diminuiu. Essa tendência foi maior para sementes submetidas a campos eletromagnéticos, principalmente aquelas expostas a maior potência. Os compostos fenólicos totais foram menores na secagem por micro-ondas quando comparados à secagem convencional. A perda de compostos fenólicos foi influenciada pela temperatura no interior do produto. As alternativas para promover maior retenção de compostos fenólicos no processo de secagem seriam a diminuição da potência antes do final da secagem, a combinação dos métodos tradicionais de secagem associados às micro-ondas e o controle da potência a ser aplicada no micro-ondas.UEL2021-04-22info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://ojs.uel.br/revistas/uel/index.php/semagrarias/article/view/4142310.5433/1679-0359.2021v42n3Supl1p1487Semina: Ciências Agrárias; Vol. 42 No. 3Supl1 (2021); 1487-1498Semina: Ciências Agrárias; v. 42 n. 3Supl1 (2021); 1487-14981679-03591676-546Xreponame:Semina. Ciências Agrárias (Online)instname:Universidade Estadual de Londrina (UEL)instacron:UELenghttps://ojs.uel.br/revistas/uel/index.php/semagrarias/article/view/41423/29436Copyright (c) 2021 Semina: Ciências Agráriashttp://creativecommons.org/licenses/by-nc/4.0info:eu-repo/semantics/openAccessReis, Naiara Nobre dosTaira, Joyce YumiQuast, Leda BattestinQuast, ErnestoMarsaioli Junior, AntonioGarais, Bruna da Silva2022-09-30T15:52:35Zoai:ojs.pkp.sfu.ca:article/41423Revistahttp://www.uel.br/revistas/uel/index.php/semagrariasPUBhttps://ojs.uel.br/revistas/uel/index.php/semagrarias/oaisemina.agrarias@uel.br1679-03591676-546Xopendoar:2022-09-30T15:52:35Semina. Ciências Agrárias (Online) - Universidade Estadual de Londrina (UEL)false |
dc.title.none.fl_str_mv |
Microwave and convective air on drying of Araucaria angustifolia seeds Utilização de micro-ondas e ar quente na secagem de sementes de Araucaria angustifolia |
title |
Microwave and convective air on drying of Araucaria angustifolia seeds |
spellingShingle |
Microwave and convective air on drying of Araucaria angustifolia seeds Reis, Naiara Nobre dos Phenolic compounds Power. Process Seed. Compostos fenólicos Potência Processo Sementes. |
title_short |
Microwave and convective air on drying of Araucaria angustifolia seeds |
title_full |
Microwave and convective air on drying of Araucaria angustifolia seeds |
title_fullStr |
Microwave and convective air on drying of Araucaria angustifolia seeds |
title_full_unstemmed |
Microwave and convective air on drying of Araucaria angustifolia seeds |
title_sort |
Microwave and convective air on drying of Araucaria angustifolia seeds |
author |
Reis, Naiara Nobre dos |
author_facet |
Reis, Naiara Nobre dos Taira, Joyce Yumi Quast, Leda Battestin Quast, Ernesto Marsaioli Junior, Antonio Garais, Bruna da Silva |
author_role |
author |
author2 |
Taira, Joyce Yumi Quast, Leda Battestin Quast, Ernesto Marsaioli Junior, Antonio Garais, Bruna da Silva |
author2_role |
author author author author author |
dc.contributor.author.fl_str_mv |
Reis, Naiara Nobre dos Taira, Joyce Yumi Quast, Leda Battestin Quast, Ernesto Marsaioli Junior, Antonio Garais, Bruna da Silva |
dc.subject.por.fl_str_mv |
Phenolic compounds Power. Process Seed. Compostos fenólicos Potência Processo Sementes. |
topic |
Phenolic compounds Power. Process Seed. Compostos fenólicos Potência Processo Sementes. |
description |
Microwave drying has shorter processing times compared with convection drying, which results in high-quality products and reduced energy consumption. The objective of this study is to evaluate the drying process of Araucaria angustifolia seeds using hot air at atmospheric pressure by applying microwaves (300 W and 500 W), and comparing them with the conventional drying process using hot air (80 °C). The drying time using hot air with microwaves at 500 W and 300 W was reduced by 83.33% and 73.89%, respectively, compared with conventional drying. The drying process occurred in the transient regime, with the predominance of a period of decreasing drying rate. The internal temperature of Araucaria seeds increased with the exposure time to the drying process, whereas the moisture content decreased. This tendency was greater for seeds subjected to electromagnetic fields, especially those exposed to higher power. The total phenolic compounds (TPCs) were lower by microwave drying when compared with conventional drying. The TPC loss was influenced by the internal temperature of the seed. Alternative methods to promote the increased retention of phenolic compounds during the drying process include decreasing the microwave power before the end of drying, combining traditional microwave-associated drying methods, and controlling the applied microwave power. |
publishDate |
2021 |
dc.date.none.fl_str_mv |
2021-04-22 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
https://ojs.uel.br/revistas/uel/index.php/semagrarias/article/view/41423 10.5433/1679-0359.2021v42n3Supl1p1487 |
url |
https://ojs.uel.br/revistas/uel/index.php/semagrarias/article/view/41423 |
identifier_str_mv |
10.5433/1679-0359.2021v42n3Supl1p1487 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
https://ojs.uel.br/revistas/uel/index.php/semagrarias/article/view/41423/29436 |
dc.rights.driver.fl_str_mv |
Copyright (c) 2021 Semina: Ciências Agrárias http://creativecommons.org/licenses/by-nc/4.0 info:eu-repo/semantics/openAccess |
rights_invalid_str_mv |
Copyright (c) 2021 Semina: Ciências Agrárias http://creativecommons.org/licenses/by-nc/4.0 |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
UEL |
publisher.none.fl_str_mv |
UEL |
dc.source.none.fl_str_mv |
Semina: Ciências Agrárias; Vol. 42 No. 3Supl1 (2021); 1487-1498 Semina: Ciências Agrárias; v. 42 n. 3Supl1 (2021); 1487-1498 1679-0359 1676-546X reponame:Semina. Ciências Agrárias (Online) instname:Universidade Estadual de Londrina (UEL) instacron:UEL |
instname_str |
Universidade Estadual de Londrina (UEL) |
instacron_str |
UEL |
institution |
UEL |
reponame_str |
Semina. Ciências Agrárias (Online) |
collection |
Semina. Ciências Agrárias (Online) |
repository.name.fl_str_mv |
Semina. Ciências Agrárias (Online) - Universidade Estadual de Londrina (UEL) |
repository.mail.fl_str_mv |
semina.agrarias@uel.br |
_version_ |
1799306083581296640 |