Phenolic compounds and antioxidant activities of three grape cultivars at different ripening stages

Kim, H. I.; Kim, S. J.; Jung, Sung-Min; Hur, Yun Jung; Nam, Jong-Chul; Park, J. K.

doi:10.17660/actahortic.2017.1188.18

Cited by 1 publication

(3 citation statements)

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“…It is known in the literature that catechin, isoquercitrin and astragalin compounds have positive effects on human health due to their high antioxidant properties [6–19] . Looking at the results, Banazı Siyahı leaf extract has high isoquercitrin and astragalin content.…”

Section: Discussionmentioning

confidence: 98%

“…have been investigated in many studies [8–10] . The rate of antioxidant activity in grapes and their products varies depending on many factors, including predominantly genetic factors that have a decisive influence, followed by ecological factors and cultural practices [11] . The health benefits of grape seed consumption are thought to be mainly due to the bioactivities of its polyphenols.…”

Section: Introductionmentioning

confidence: 99%

“…[8][9][10] The rate of antioxidant activity in grapes and their products varies depending on many factors, including predominantly genetic factors that have a decisive influence, followed by ecological factors and cultural practices. [11] The health benefits of grape seed consumption are thought to be mainly due to the bioactivities of its polyphenols. Therefore, grape-derived extracts are natural sources of polyphenols, with their antioxidative, anti-acetylcholinesterase, anti-amyloidoid, anti-inflammatory and antimicrobial activities, which can drive antitumor, cardiovascular disease and healthy brain aging.…”

Section: Introductionmentioning

confidence: 99%

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Phytochemical Contents of Different Parts of the Seeded Raisins from the South‐East Anatolia: Enzyme Inhibitory Potential of Pulp Extracts

Karataş

Yener

et al. 2022

Chemistry & Biodiversity

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In this study, some phytochemical properties of six seeded raisin species that are mainly cultivated in Southeastern Anatolia were investigated. Additionally, some physical and quality characteristics, phenolic contents (by LC‐MS/MS; Liquid Chromatography Tandem Mass/Mass Spectrometer System), anticholinesterase, and antioxidant capacities (DPPH; 2,2‐diphenyl‐1‐picrylhydrazyl free‐radical scavenging, ABTS; 2,2‐azinobis(3‐ethylbenzothiazoline‐6‐sulphonic acid cation‐radical scavenging activity and CUPRAC; cupric reducing antioxidant capacity) of the cultivars were investigated on ground raisins. In all three methods, the antioxidant activity values of seed extracts were determined to be higher than those of leaf and pulp extracts. Remarkably, the seed extract of Banazı Siyahı showed the highest antioxidant activity in ABTS (IC50: 4.35±0.02 μg/mL), DPPH (IC50: 10.78±0.78 μg/mL), and CUPRAC (A0.5: 9.33±0.45 μg/mL) methods. Additionally, the ethanol extracts of all pulp samples showed higher anticholinesterase activity against acetyl‐(AChE) and butyrylcholinesterase (BChE) enzymes than galantamine. According to the LC‐MS/MS results, catechin (21.362 mg analyte/g extract) and epicatechin (44.667 mg analyte/g extract) found to be quite rich in Kerküş seed extract and isoquercitrin (116.873 mg analyte/g extract) and astragalin (31.915 mg analyte/g extract) detected to be quite rich in Banazı Siyahı leaf extract. Considering the mineral content of the varieties and the soil samples they grow in, all of the grape varieties analyzed in the study was found to be rich. Based on these findings, it might be suggested that Banazı Siyahı and Kerküş varieties have potential to be utilized in pharmaceutical and food industries, due to their contents of catechins, isoquercitrin and astragalin.

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Section: Discussionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%