Scanning electron microscopy of coffee beans subjected to different forms of processing and drying

dc.contributorBorém, Flávio Meira
dc.contributorOliveira, Pedro Damasceno
dc.contributorIsquierdo, Eder Pedroza
dc.contributorGiomo, Gerson da Silva
dc.contributorSaath, Reni
dc.contributorCardoso, Renan Alves
dc.creatorBorém, Flávio Meira
dc.creatorOliveira, Pedro Damasceno
dc.creatorIsquierdo, Eder Pedroza
dc.creatorGiomo, Gerson da Silva
dc.creatorSaath, Reni
dc.creatorCardoso, Renan Alves
dc.date2013-12-24
dc.date.accessioned2017-08-01T20:06:12Z
dc.date.available2017-08-01T20:06:12Z
dc.date.issued2017-08-01
dc.descriptionThe objective of the present work was to evaluate changes in the structure of coffee beans processed and dried in different ways. The experiment was conducted with two types of processing: dry and wet, and four drying methods: drying on ground and mechanical drying with air heated to 50/40 ° C, 60/40 ° C and 40/60 ° C, where the temperature was changed when the coffee beans reached 30% ± 2% (db), with supplementation of dehydrated to 11% ± 1% (wb). The mechanical drying system used consisted of three fixed bed dryers, which allows control of temperature and flow rate of drying. During the experiment,data were collected to assess the dynamics of drying.After treatment application, the coffee beans were subjected to studies in a scanning electron microscope (SEM). The observation of the coffee beans by SEM showed that the drying temperature of 50/40 ° C pulped coffees showed similar results to those dried in cafes, with a small contraction of the cells, without signs of rupture. It was observed that utilization of the drying temperature 40/60 ° C was the most damage caused to the structures of cells, regardless of the type of processing. It was found that the coffee prepared by dry showed higher destruction of the cellularcomponents of the coffee pulped and, a longer exposure of coffee to the drying process.
dc.descriptionObjetivou-se, no presente trabalho, avaliar alterações na estrutura de grãos de café processados e secados de diferentes formas. O experimento foi realizado com dois tipos de processamento: via seca e via úmida; e quatro métodos de secagem: secagem em terreiro, e secagem mecânica com ar aquecido a 50/40°C, 60/40°C e 40/60ºC, onde a temperatura foi alterada quando os grãos de café atingiram 30%±2% (b.u.), com complementação da secagem até atingir 11%±1% (b.u.). O sistema mecânico de secagem utilizado constituiu-se de três secadores de camada fixa, o qual permite o controle da temperatura e fluxo de secagem. Durante o experimento foram coletados dados para a avaliação da dinâmica de secagem. Após a aplicação dos tratamentos, os grãos de cafés foram submetidos a estudos em microscópio eletrônico de varredura (MEV). A observação dos grãos de café em MEV mostrou que a temperatura de secagem de 50/40°C dos cafés despolpados apresentou resultados semelhantes aos cafés secados em terreiro, com pequena contração das células, sem sinais evidentes de ruptura. Pôde-se observar também que a utilização da temperatura de secagem 40/60°C foi a que mais causou danos às estruturas dascélulas, independentemente do tipo de processamento. Verificou-se que os cafés preparados por via seca apresentaram maior desestruturação dos componentes celulares do que os cafés despolpados, bem como maior tempo de exposição desses cafés ao processo de secagem.
dc.formatapplication/pdf
dc.formatapplication/pdf
dc.identifierhttp://www.coffeescience.ufla.br/index.php/Coffeescience/article/view/420
dc.identifier.citationBORÉM, F. M. et al. Scanning electron microscopy of coffee beans subjected to different forms of processing and drying. Coffee Science, Lavras, v. 8, n. 2, p. 227-237, abr./jun. 2013.
dc.identifier.urihttps://repositorio.ufla.br/handle/1/13615
dc.languageeng
dc.languagepor
dc.relationhttp://www.coffeescience.ufla.br/index.php/Coffeescience/article/view/420/pdf_150
dc.relationhttp://www.coffeescience.ufla.br/index.php/Coffeescience/article/view/420/pdf_34
dc.relationhttp://www.coffeescience.ufla.br/index.php/Coffeescience/article/downloadSuppFile/420/237
dc.relationhttp://www.coffeescience.ufla.br/index.php/Coffeescience/article/downloadSuppFile/420/238
dc.relationhttp://www.coffeescience.ufla.br/index.php/Coffeescience/article/downloadSuppFile/420/283
dc.relationhttp://www.coffeescience.ufla.br/index.php/Coffeescience/article/downloadSuppFile/420/284
dc.rightsAttribution 4.0 International*
dc.rightsAttribution 4.0 International
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/*
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.sourceCoffee Science; v. 8, n. 2 (2013); 227-237
dc.sourceCoffee Science; v. 8, n. 2 (2013); 227-237
dc.sourceCoffee Science; v. 8, n. 2 (2013); 227-237
dc.source1984-3909
dc.source1809-6875
dc.subjectCafeicultura
dc.subjectCafé - Pós-colheita
dc.subjectCoffee post-harvest
dc.subjectCafé - Curvas de secagem
dc.subjectAnálise ultraestrutural
dc.subjectCoffee drying curves
dc.subjectUltrastructural analysis
dc.titleScanning electron microscopy of coffee beans subjected to different forms of processing and drying
dc.titleMicroscopia eletrônica de varredura de grâos de café submetidos a diferentes formas de processamento e secagem
dc.typeinfo:eu-repo/semantics/article
dc.typeinfo:eu-repo/semantics/publishedVersion

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