Antioxidant activities and bioactive components in some berries

Abstract

The objective of this study was to evaluate the antioxidant and binding effects of gooseberry, a less-studied berry, and to compare with blueberry and cranberry in the model of interaction with human serum albumin (HSA). The relationship between the scavenging properties of dietary polyphenols of the selected berries and their affinities for HSA were investigated by fluorescence analysis. In order to perform the extraction and identification of the antioxidants present in the samples, different types of extraction solvents were used, such as water, ethyl acetate, and diethyl ether. The polyphenols, tannins, anthocyanins and ascorbic acid contents, and the total antioxidant capacities (TACs) of the berry extracts were assessed by using ESI-MS, FTIR, and radical scavenging assays. The contents of bioactive compounds and the levels of TACs in water extracts differed significantly and were the highest in water extracts in comparison with other extracts in all the investigated berries (P \ 0.05). Gooseberry water extracts contained: polyphenols (mg GAE/g DW)-5.37 ± 0.6, tannins (mg CE/g DW)-0.71 ± 0.2, anthocyanins (mg CGE/g DW)-12.0 ± 1.2, ascorbic acid (mg AA/g DW)-5.15 ± 0.5, and TACs (lMTE/g DW) by ABTS and FRAP assays were 15.53 ± 1.6 and 6.51 ± 0.7, respectively. In conclusion, the bioactivity of gooseberry was lower than blueberries and cranberries. The antioxidant and binding properties of gooseberries in comparison with widely consumed blueberries and cranberries can be used as a new source for food supplementation.

The effect of different maturity stages on phytochemical composition and antioxidant capacity of cranberry cultivars

“…According to Oszmiański et al [28], the antioxidant capacity measured by the ABTS and FRAP assay in cranberry cultivars 'Pilgrim', 'Stevens', and 'Ben Lear' was around 2 times higher and around 3 times lower than antioxidant capacity in the same cultivars of cranberry harvested at different maturity stages. Namiesnik et al [39] reported that antioxidant capacity measured by ABTS assay ranged from 10.72 to 72.76 μmol/g dm, while FRAP assay values ranged from 3.28 to 26.97 μmol/g dm, which was lower than our results. The antioxidant capacity (as with the ABTS and FRAP assay) increased remarkably in fruit cvs.…”

The Methodology Applied in DPPH, ABTS and Folin-Ciocalteau Assays Has a Large Influence on the Determined Antioxidant Potential

“…The AOP of dried cranberries with added vit. C is almost two orders of magnitude higher than that of dried cranberry fruits, which in comparison to literature AOP data is of similar range though somewhat lower, 17,27 most probably due to losses incurred during drying and storage, since the published data were obtained by analysing fresh fruit. The labelled content of ascorbic acid (AA) in the enriched cranberry food supplement amounts to 1.4 mmol/g.…”

“…[15][16][17][18][19][20] The primary purpose of the present study was to demonstrate how the selected method and composition of the assay solvent influence the reactivity of antioxidant compounds in the above mentioned foods with chromogenic radicals, DPPH…”

Primer registro de <i>Chloridea (Heliothis) subflexa</i> (Lepidoptera: Noctuidae: Heliothinae) en uchuva en Brasil

“…The fruits are eaten raw or processed (via juices, jellies, dehydrated) (Puente et al, 2011). The berries stand out because of their exotic taste and high mineral content, antioxidants, and medicinal and bioactive substances (Puente et al, 2011;Ramadan, 2012;Rop et al, 2012;Rutz et al, 2012;Namiesnik et al, 2013;Bravo et al, 2014;Fischer et al, 2014;Moneim et al, 2014;Al-Olayan et al, 2014;Ahmed, 2014).…”