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Article Abstract
Apple polyphenols have been studied for various beneficial bioactivities. Especially interesting are traditional, old varieties of apples for which some initial studies have suggested significant bioactivities, but they are still not completely understood. Polyphenol bioactivities can be affected by interactions with dietary fibers such as β-glucans. The aim of this study was to investigate for the first time interactions between individual polyphenols from traditional, old apple varieties ("Božićnica" and "Batulenka") and β-glucans by studying the adsorption process. Polyphenols were extracted from the peel and flesh of traditional apples by using an ultrasonic bath and characterized with high-performance liquid chromatography. The amounts of adsorbed () and un-adsorbed () polyphenols were modeled with adsorption isotherms (Langmuir, Dubinin-Radushkevich, and Hill) by using improved non-linear fitting in a novel R algorithm, developed specifically for the modeling of adsorption isotherms. Polyphenols adsorbed onto β-glucan from 9 to 203 (peel, "Božićnica"), 1 to 484 (peel, "Batulenka"), 5 to 160 (flesh, "Božićnica"), and 19 to 28 mg g (flesh, "Batulenka"). The adsorption was concentration dependent (polyphenols present in higher amount adsorbed in higher amounts). Physical sorption can be suggested. Polyphenols from traditional apples adsorb onto β-glucan and should be further studied.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7556014 | PMC |
| http://dx.doi.org/10.3390/foods9091278 | DOI Listing |
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