Please use this identifier to cite or link to this item: http://repositorio.ufpa.br/jspui/handle/2011/8773
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Type: Artigo de Periódico
Issue Date: Jun-2015
Authors: COSTA, Telma dos Santos
ROGEZ, Hervé Louis Ghislain
PENA, Rosinelson da Silva
Title: Adsorption capacity of phenolic compounds onto cellulose and xylan
Citation: COSTA, Telma dos Santos ; ROGEZ, Herve Louis Ghislain ; PENA, Rosinelson da Silva. Adsorption capacity of phenolic compounds onto cellulose and xylan. Food Science and Technology (Campinas), Campinas, v. 35, n. 2, p. 314-320, abr./jun. 2015. Disponível em: <http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612015000200314&lng=pt&nrm=iso>. Acesso em: 03 jul. 2017. <http://dx.doi.org/10.1590/1678-457X.6568>.
Abstract: The interaction between three phenolic compounds (catechin, caffeic acid and ferulic acid) onto two dietary fibres (cellulose and xylan) has been evaluated to inquire possible interferences on the biodisponibility of phenolic compounds. The adsorption kinetics were performed using solutions containing 100 mg/L of phenolic compounds during a contact time ranging between 10 and 120 minutes at pH 2.0, 4.5, and 7.0. After the kinetics, isotherms were obtained using phenolic compounds concentration ranging between 10 and 80 mg/L during 60 minutes, at pH 2.0 and 7.0 and temperature of 36 °C. Results indicate that adsorbed quantities mainly changed in function of pH, however the maximum adsorption was only of 0.978 mg of caffeic acid/g of xylan at pH 2 and after 60 min. Redlich-Peterson model were able to predict the adsorption isotherms of all phenolic compounds onto cellulose, except for caffeic acid at pH 7.0. The low adsorption capacities observed suggest that both dietary fibres are unable to compromise the biodisponibility of phenolic compounds, especially in the small intestine, where they are partially absorbed.
Keywords: Compostos fenólicos
Cinética
Celulose
Isoterma
metadata.dc.relation.ispartof: Food Science and Technology (Campinas)
ISSN: 1678-457X
Country: Brasil
Publisher: Universidade Federal do Pará
Institution Acronym: UFPA
Appears in Collections:Artigos Científicos - FEA/ITEC

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