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Issue 4, 2019
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Chemical characterization and bioactive properties of a coffee-like beverage prepared from Quercus cerris kernels

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Abstract

In the present study, a coffee-like beverage was prepared from Quercus cerris seeds. Seeds presented 60.4% carbohydrates (of which 26.9% is fiber), 6.3% proteins and 4.0% fat. In the coffee-like beverage, the TPC and TFC were 2070.2 mg GAE per L and 285.3 mg CEQ per L, respectively. The IC50 values determined using FRAP and DPPH assays were, respectively, 203.1 mg L−1 and 271.6 mg L−1. Concerning the reactive species scavenging capacity, the extract was more effective against O2˙, HClO and ˙NO (namely, IC50 = 17.24 ± 0.24 μg mL−1, IC50 = 9.25 ± 0.92 μg mL−1 and IC50 = 0.65 ± 0.06 μg mL−1). Qualitative and quantitative analyses by 1D- and 2D-NMR and LC-MS indicated high levels of ellagic acid and gallotannin or ellagitannin derivatives. The optimal range of non-cytotoxic concentrations in Caco-2 and HT29-MTX cell lines was between 0.1 and 1.0 μg mL−1. This is the first study that evaluates the Q. cerris seed extract as a beverage.

Graphical abstract: Chemical characterization and bioactive properties of a coffee-like beverage prepared from Quercus cerris kernels

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Publication details

The article was received on 21 Dec 2018, accepted on 05 Mar 2019 and first published on 25 Mar 2019


Article type: Paper
DOI: 10.1039/C8FO02536C
Citation: Food Funct., 2019,10, 2050-2060

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    Chemical characterization and bioactive properties of a coffee-like beverage prepared from Quercus cerris kernels

    D. Pinto, S. Diaz Franco, A. M. Silva, S. Cupara, M. Koskovac, K. Kojicic, S. Soares, F. Rodrigues, S. Sut, S. Dall'Acqua and M. B. P. P. Oliveira, Food Funct., 2019, 10, 2050
    DOI: 10.1039/C8FO02536C

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