Phenolic compounds, organic acids and antioxidant activity of grape juices produced from new Brazilian varieties planted in the Northeast Region of Brazil

Abstract

The phenolic compounds, organic acids and the antioxidant activity were determined for grape juice samples from new Brazilian varieties grown in the Sub-middle São Francisco Valley in the Northeast Region of Brazil. The results showed that the Brazilian grape juices have high antioxidant activity, which was significantly correlated with the phenolic compounds catechin, epicatechin gallate, procyanidin B1, rutin, gallic acid, caffeic acid, p-coumaric acid, pelargonidin-3-glucoside, cyanidin-3-glucoside, cyaniding-3,5-diglucoside and delphinidin-3-glucoside. The produced juice samples showed higher concentrations of trans-resveratrol than those observed in juices made from different varieties of grapes from traditional growing regions. Organic acids concentrations were similar to those of juices produced from other classical varieties. It was demonstrated that it is possible to prepare juices from grapes of new varieties grown in the Northeast of Brazil containing a high content of bioactive compounds and typical characteristics of the tropical viticulture practised in the Sub-middle São Francisco Valley.

Quality Evaluation, Total Phenolic Content, Organic Acid Profiles and Antioxidant Activity of Soft Drinks with Koruk (Sour Grape) Concentrate

“…It was found that the major organic acid was malic acid in studied soft drinks and it represented more than 90% of total acidity in carbonated drinks and ice tea and 85% of that of sherbet. It was reported that the organic acid distribution related to concentrate additive was affected by various factors including koruk maturity, variety, climate, location and processing technology (12,17,21,32). In current study, the usability of koruk juice in the production of ice tea, carbonated drink and sherbet was evaluated.…”

“…Moreover, these are sources of organic acid and have antimicrobial effects. For this reasons, different researchers carried out various studies on defining the composition, properties and the clarification of koruk juice (9)(10)(11)(12)(13)(14)(15), on the quality of grape juice and its variability of different storage conditions (16)(17)(18)(19)(20)(21)(22)(23), although there are limited studies concerning the usability of koruk juice for soft drinks manufacturing.…”

Phenolic Compounds and Antioxidant Activity in Grape Juices: A Chemical and Sensory View

“…Many of these benefits are linked to the antioxidant compounds found in grape juice, such as flavonoids (anthocyanins, proanthocyanidins), phenolic acids and resveratrol among others [5,58]. Therefore, grape juice is consumed not only due to its appreciated sensory characteristics but also because it is a cheap source of phenolic compounds that exert beneficial health effects when consumed [59][60][61], as shown in Table 1.…”

Antioxidant Capacity of a Turkish Traditional Alcoholic Drink, Raki

“…However, Pellegrini et al Studies have indicated that the major constituents of aniseed are anethole, estragole, eugenol, umbelliferon, coumarins [Gülçın et al, 2003]. Grapes are rich in phenolic compounds such as gallic acid, caffeic acid, chlorogenic acid, kaempferol, quercetin [dos Lima et al, 2014]. These phenolic compounds have been considered to have high antioxidant activity.…”