Drying rates of Rubi grapes submitted to chemical pretreatments for raisin production
Autor(a) principal: | |
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Data de Publicação: | 2006 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Pesquisa Agropecuária Brasileira (Online) |
Texto Completo: | https://seer.sct.embrapa.br/index.php/pab/article/view/7165 |
Resumo: | The objective of this work was to determine the most appropriated chemical treatment to be used to dry grapes cv. Rubi for raisin production. Drying curves for convective drying with air at 50oC, in a tray drier, were obtained for grapes submitted to chemical pretreatments with different concentrations of potassium carbonate and olive oil, and different dipping times, according to factorial designs. Convective drying curves were also obtained for grapes pretreated in aqueous suspensions of soybean lecithin, at varied lecithin concentrations and dipping times. Page model was adjusted to the experimental drying curves, and the calculated drying times showed that the best pretreatment consisted in dipping grapes for 2 minutes in a 5% olive oil and 6% K2CO3 emulsion, at 50oC, which resulted in a drying time close to that of the pretreatment with 2.5% of olive oil, but with a lower consumption of this substance. In addition, the immersion of grapes in an aqueous suspension of 2% soy lecithin, at 50oC, for 5 minutes, resulted in a total drying time slightly higher than the most effective pretreatment. |
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Drying rates of Rubi grapes submitted to chemical pretreatments for raisin productionTaxas de secagem de uva Rubi submetida a pré-tratamentos químicos para a produção de passasVitis vinifera; drying kinetics; soybean lecithin; olive oil; dipping treatmentsVitis vinifera; cinética de secagem; lecitina de soja; azeite de oliva; pré-tratamentos químicosThe objective of this work was to determine the most appropriated chemical treatment to be used to dry grapes cv. Rubi for raisin production. Drying curves for convective drying with air at 50oC, in a tray drier, were obtained for grapes submitted to chemical pretreatments with different concentrations of potassium carbonate and olive oil, and different dipping times, according to factorial designs. Convective drying curves were also obtained for grapes pretreated in aqueous suspensions of soybean lecithin, at varied lecithin concentrations and dipping times. Page model was adjusted to the experimental drying curves, and the calculated drying times showed that the best pretreatment consisted in dipping grapes for 2 minutes in a 5% olive oil and 6% K2CO3 emulsion, at 50oC, which resulted in a drying time close to that of the pretreatment with 2.5% of olive oil, but with a lower consumption of this substance. In addition, the immersion of grapes in an aqueous suspension of 2% soy lecithin, at 50oC, for 5 minutes, resulted in a total drying time slightly higher than the most effective pretreatment.O objetivo deste trabalho foi selecionar o pré-tratamento químico mais apropriado para a secagem de uvas cv. Rubi para a produção de passas. Foram obtidas curvas de secagem convectiva com ar a 50oC, em um secador de bandejas, para uvas submetidas a pré-tratamentos químicos com diferentes concentrações de carbonato de potássio e azeite de oliva, e diferentes tempos de imersão, de acordo com planejamentos fatoriais. Também foram obtidas curvas de secagem convectiva, para uvas pré-tratadas em suspensões aquosas de lecitina de soja, em várias concentrações de lecitina e diferentes tempos de imersão. O modelo de Page foi ajustado às curvas de secagem experimental, e os tempos de secagem calculados mostraram que o melhor pré-tratamento consistiu na imersão das uvas por 2 minutos, em uma emulsão de 5% de azeite de oliva e 6% de K2CO3, a 50oC, o que resultou em tempos de secagem próximos aos do pré-tratamento com 2,5% de azeite de oliva, mas com um menor consumo dessa substância. Além disso, a imersão das uvas em uma suspensão aquosa de 2% de lecitina de soja, a 50oC, por 5 minutos, resultou em um tempo de secagem total apenas levemente superior ao do pré-tratamento mais efetivo.Pesquisa Agropecuaria BrasileiraPesquisa Agropecuária BrasileiraTelis, Vânia Regina NicolettiLourençon, Vânia AraújoGabas, Ana LúciaTelis-Romero, Javier2006-03-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://seer.sct.embrapa.br/index.php/pab/article/view/7165Pesquisa Agropecuaria Brasileira; v.41, n.3, mar. 2006; 503-509Pesquisa Agropecuária Brasileira; v.41, n.3, mar. 2006; 503-5091678-39210100-104xreponame:Pesquisa Agropecuária Brasileira (Online)instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)instacron:EMBRAPAenghttps://seer.sct.embrapa.br/index.php/pab/article/view/7165/4210info:eu-repo/semantics/openAccess2014-09-26T18:16:23Zoai:ojs.seer.sct.embrapa.br:article/7165Revistahttp://seer.sct.embrapa.br/index.php/pabPRIhttps://old.scielo.br/oai/scielo-oai.phppab@sct.embrapa.br || sct.pab@embrapa.br1678-39210100-204Xopendoar:2014-09-26T18:16:23Pesquisa Agropecuária Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)false |
dc.title.none.fl_str_mv |
Drying rates of Rubi grapes submitted to chemical pretreatments for raisin production Taxas de secagem de uva Rubi submetida a pré-tratamentos químicos para a produção de passas |
title |
Drying rates of Rubi grapes submitted to chemical pretreatments for raisin production |
spellingShingle |
Drying rates of Rubi grapes submitted to chemical pretreatments for raisin production Telis, Vânia Regina Nicoletti Vitis vinifera; drying kinetics; soybean lecithin; olive oil; dipping treatments Vitis vinifera; cinética de secagem; lecitina de soja; azeite de oliva; pré-tratamentos químicos |
title_short |
Drying rates of Rubi grapes submitted to chemical pretreatments for raisin production |
title_full |
Drying rates of Rubi grapes submitted to chemical pretreatments for raisin production |
title_fullStr |
Drying rates of Rubi grapes submitted to chemical pretreatments for raisin production |
title_full_unstemmed |
Drying rates of Rubi grapes submitted to chemical pretreatments for raisin production |
title_sort |
Drying rates of Rubi grapes submitted to chemical pretreatments for raisin production |
author |
Telis, Vânia Regina Nicoletti |
author_facet |
Telis, Vânia Regina Nicoletti Lourençon, Vânia Araújo Gabas, Ana Lúcia Telis-Romero, Javier |
author_role |
author |
author2 |
Lourençon, Vânia Araújo Gabas, Ana Lúcia Telis-Romero, Javier |
author2_role |
author author author |
dc.contributor.none.fl_str_mv |
|
dc.contributor.author.fl_str_mv |
Telis, Vânia Regina Nicoletti Lourençon, Vânia Araújo Gabas, Ana Lúcia Telis-Romero, Javier |
dc.subject.por.fl_str_mv |
Vitis vinifera; drying kinetics; soybean lecithin; olive oil; dipping treatments Vitis vinifera; cinética de secagem; lecitina de soja; azeite de oliva; pré-tratamentos químicos |
topic |
Vitis vinifera; drying kinetics; soybean lecithin; olive oil; dipping treatments Vitis vinifera; cinética de secagem; lecitina de soja; azeite de oliva; pré-tratamentos químicos |
description |
The objective of this work was to determine the most appropriated chemical treatment to be used to dry grapes cv. Rubi for raisin production. Drying curves for convective drying with air at 50oC, in a tray drier, were obtained for grapes submitted to chemical pretreatments with different concentrations of potassium carbonate and olive oil, and different dipping times, according to factorial designs. Convective drying curves were also obtained for grapes pretreated in aqueous suspensions of soybean lecithin, at varied lecithin concentrations and dipping times. Page model was adjusted to the experimental drying curves, and the calculated drying times showed that the best pretreatment consisted in dipping grapes for 2 minutes in a 5% olive oil and 6% K2CO3 emulsion, at 50oC, which resulted in a drying time close to that of the pretreatment with 2.5% of olive oil, but with a lower consumption of this substance. In addition, the immersion of grapes in an aqueous suspension of 2% soy lecithin, at 50oC, for 5 minutes, resulted in a total drying time slightly higher than the most effective pretreatment. |
publishDate |
2006 |
dc.date.none.fl_str_mv |
2006-03-01 |
dc.type.none.fl_str_mv |
|
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://seer.sct.embrapa.br/index.php/pab/article/view/7165 |
url |
https://seer.sct.embrapa.br/index.php/pab/article/view/7165 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
https://seer.sct.embrapa.br/index.php/pab/article/view/7165/4210 |
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.publisher.none.fl_str_mv |
Pesquisa Agropecuaria Brasileira Pesquisa Agropecuária Brasileira |
publisher.none.fl_str_mv |
Pesquisa Agropecuaria Brasileira Pesquisa Agropecuária Brasileira |
dc.source.none.fl_str_mv |
Pesquisa Agropecuaria Brasileira; v.41, n.3, mar. 2006; 503-509 Pesquisa Agropecuária Brasileira; v.41, n.3, mar. 2006; 503-509 1678-3921 0100-104x reponame:Pesquisa Agropecuária Brasileira (Online) instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa) instacron:EMBRAPA |
instname_str |
Empresa Brasileira de Pesquisa Agropecuária (Embrapa) |
instacron_str |
EMBRAPA |
institution |
EMBRAPA |
reponame_str |
Pesquisa Agropecuária Brasileira (Online) |
collection |
Pesquisa Agropecuária Brasileira (Online) |
repository.name.fl_str_mv |
Pesquisa Agropecuária Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa) |
repository.mail.fl_str_mv |
pab@sct.embrapa.br || sct.pab@embrapa.br |
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1793416689279303680 |