Naslov
An equilibrium and kinetic study of phenolic acids adsorption onto β-glucan

Autori
Matić, Petra ; Jakobek, Lidija ; Ukić, Šime

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Book of abstracts of the 10th International Scientific and Professional Conference "With food to health" / Šubarić, Drago ; Jašić, Midhat - Osijek : Tuzla : Prehrambeno tehnološki fakultet Sveučilišta Josipa Jurja Strossmayera u Osijeku ; Farmaceutski fakultet Univerziteta u Tuzli, 2017, 50-50

ISBN
978-953-7005-49-8

Skup
Book of abstracts of the 10th International Scientific and Professional Conference "With food to health"

Mjesto i datum
Osijek, Hrvatska, 12.10.2017. - 13.10.2017

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Adsorption, kinetic, polyphenols, β-glucan

Sažetak
Phenolic acids belong to the group of natural polyphenols, which are secondary plant metabolites. Polyphenols show many positive bioactivities, which are not completely investigated. One of these bioactivities is the polyphenol interaction with food compounds, such as lipids, proteins, and dietary fibres. The Information about the interactions between polyphenols and dietary fibres can be obtained through the parameters of adsorption equilibrium models, like Freundlich, Langmuir, Dubinin-Radushkevich, and others. Also, the reaction order and the kinetic constants can be obtained through kinetic models, like pseudo-first and pseudo-second order models. The objective of this study was to obtain information about the interactions between phenolic acids, like, p-coumaric and caffeic acid, and β-glucan as a natural dietary fibre, through non-linear adsorption models and kinetic models of the pseudo-first and pseudo-second order. The adsorption was carried out at 25ᵒC for 16 h, in a model solution which contained polyphenol, β-glucan, and phosphate buffer pH 5.5. Kinetics was conducted at 25ᵒC during 1, 2, 5, 10, and 16 h. After reaching the adsorption equilibrium, the un-adsorbed polyphenols were separated from the adsorbed ones by ultrafiltration. The non-linear adsorption equilibrium models and kinetic models were determined. The results showed that the adsorption was favoured and chemical, and was best described by the pseudo-second order model.

Izvorni jezik
Engleski

Znanstvena područja
Prehrambena tehnologija

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