Use este identificador para citar ou linkar para este item:
https://locus.ufv.br//handle/123456789/21932
Tipo: | Artigo |
Título: | Extraction and characterization of pectin from cacao pod husks (Theobroma cacao L.) with citric acid |
Autor(es): | Teófilo, Reinaldo Francisco Vriesmann, Lúcia Cristina Petkowicz, Carmen Lúcia de Oliveira |
Abstract: | Variables that influence the citric-acid extraction of pectins from cacao pod husk were examined. A screening study tested the main parameters influencing pectin yield and uronic acid content by a factorial fractional 33−1 design. Further, response surface methodology was applied using a central composite design to examine the effect of a greater region of variable values on pectin yield and uronic acid content. The yield was optimized by increasing the temperature and time. None of the variables had a significant effect on the uronic acid content, and there was lack of fit of the model to the uronic acid content. From the fitted model, extraction conditions with aqueous citric acid at pH 3.0 for 95 min at 95 °C provided a predicted yield of approximately 9.0 g/100 g dry cacao pod husks. The obtained experimental value for the yield was 10.1 ± 0.3 g/100 g dry cacao pod husks, with the pectins containing 65.1 ± 0.8 g uronic acid/100 g fraction, DE 40.3% and DA 15.9%. At 5 g/100 g aqueous solution, the fraction behaved as a concentrated solution and presented a non-Newtonian shear-thinning behavior, well described by Cross Model. Additionally, the fraction formed gels at acidic pH and high sucrose content. |
Palavras-chave: | Cacao pod husks Citric acid Response surface methodology LM pectin Acetyl Rheology |
Editor: | LWT - Food Science and Technology |
Tipo de Acesso: | Open Access |
URI: | https://doi.org/10.1016/j.lwt.2012.04.018 http://www.locus.ufv.br/handle/123456789/21932 |
Data do documento: | Nov-2012 |
Aparece nas coleções: | Artigos |
Arquivos associados a este item:
Arquivo | Descrição | Tamanho | Formato | |
---|---|---|---|---|
artigo.pdf | texto completo | 886,01 kB | Adobe PDF | Visualizar/Abrir |
Os itens no repositório estão protegidos por copyright, com todos os direitos reservados, salvo quando é indicado o contrário.