Antioxidant Potential and Phenolic Compounds of Some Widely Consumed Turkish White Bean (Phaseolus vulgaris L.) Varieties

Abstract

Key words: white bean, phenolic compounds, antioxidant activity, FRAP, ABTS, β-carotene-linoleic acid emulsionThe antioxidant potential and phenolic compounds content were investigated in ten white bean varieties widely consumed in Turkey. Total phenolic contents of seeds varied between 0.33 and 0.63 mg GAE/g. The Trolox Equivalent Antioxidant Capacity (TEAC) determined by the ABTS assay and the Ferric-Reducing Antioxidant Power (FRAP) of bean varieties ranged from 3.50 to 5.17 μmol Trolox/g seed and from 7.99 to 11.20 μmol Fe 2+ /g seed, respectively. Strong correlations were found between total phenolic content and FRAP (r=0.850) and between TEAC and FRAP (r=0.734). The antioxidant activity was investigated in a β-carotene-linoleic acid model system, as well. Differences in the inhibition of emulsion oxidation by extracts of white bean varieties were slight. The RP-HPLC fi ngerprint analysis of extracts showed the presence of fi ve dominant phenolic compounds which were described as ferulic or caffeic acids derivatives. Four of them signifi cantly contributed to reducing power and antiradical activity against ABTS•+ of extracts.

Antioxidant Activity of Faba Bean Extracts

“…The results obtained in this research confirm the fact that faba bean is a rich source of phenolic compounds as well as condensed tannins. A lower content of total phenolic compounds was previously reported for extracts of pea [28], white bean [29], broad bean [23,30] lupin [31], and grass pea [32]. A similarly high content of total phenolic compounds was previously reported for red lentil [33], green lentil [34], red bean [35], and adzuki bean [36].…”

Toward consistent discrimination of common bean (Phaseolus vulgarisL.) based on grain coat color, phytochemical composition, and antioxidant activity

“…Marzo, Alonso, Urdaneta, Arricibiata, and Ibáñez () published TPC of 44 mg/100 g of grain. The phenols compounds content of some widely consumed Turkish white bean ranged from 33 to 63 mg/100 g of grain (using 80% methanol as extraction solvent) (Orak, Karamać, Orak, & Amarowicz, ). TPC varies in the literature depending on the determination and extraction method.…”

“…Samples with white grain color have the lowest content of total phenols (0.166–0.344 mg/100 g DM) and total flavonoids (4.861–28.112 mg/100 g DM) as well as the highest IC 50 values, that is , the lowest antioxidant activity (5.493–12.917 mg/ml). Generally, available literature and comparative studies conducted on different common bean genotypes indicated that the total phenols and flavonoids content as well as antioxidant activity in common bean samples with white grain coat color were lower than in samples with colored grain coat (Dinelli et al, 2006; Nyau et al, ; Orak et al, ). In the present study, the samples could not be distinguished on the basis of the grain size, growth type, and origin, but only on the basis of the grain coat color.…”

“…Determined contents of total phenols and flavonoids, as well as the antioxidant activity, are presented in Figure 2 and their values are presented in Supplementary Data Table S1. It can be noticed accord- bean ranged from 33 to 63 mg/100 g of grain (using 80% methanol as extraction solvent) (Orak, Karamać, Orak, & Amarowicz, 2016).…”

Perbandingan Aktivitas Antioksidan dan Toksisitas Antara Drop Vitamin A dari Karotenoid Kulit Pisang Ambon dan ß-Karoten

“…15 β karoten memiliki reaksi dengan radikal hidroperoksil lemak sehingga melindungi lemak dari reaksi peroksidasi (perubahan lemak tidak jenuh menjadi lemak yang bersifat oksidan). 16 Radikal bebas yang berlebihan menyebabkan stres oksidatif yang ditandai dengan peningkatan kadar MDA. 4 Akan tetapi, dalam penelitian ini tidak menggunakan kelinci yang diinduksi tinggi radikal bebas.…”