scholarly journals Antioxidant and polyphenol content of different Vitis vinifera seed cultivars and two facilities of production of a functional bakery product

2021 ◽  
Author(s):  
Viktória Kapcsándi ◽  
Erika Hanczné Lakatos ◽  
Beatrix Sik ◽  
László Ádám Linka ◽  
Rita Székelyhidi
Keyword(s):  
Grape Seed ◽  
Spectrophotometric Analysis ◽  
Seed Meal ◽  
Gluten Free ◽  
Grape Seeds ◽  
Polyphenol Content ◽  
Total Polyphenol ◽  
Total Polyphenol Content ◽  
Antioxidant Content ◽  
Total Antioxidant

AbstractThis study aimed to examine the differences between the antioxidant capacity, and the total polyphenol content of the seed of eight different grape varieties. We also attempt to create a functional loaf enriched with grape seed meal. To achieve this goal, 3, 6, and 9% of the grape seed meal were added to the loaves made of bread flour and gluten-free flour mixture, and then the changes in their antioxidant and polyphenol content were examined. Based on the results, there were significant differences between the polyphenol and antioxidant content of grape seed varieties. The antioxidant content of the grape seeds varied between 228.50 mg AAE/g (94.80 mg TE/g) and 438.33 mg AAE/g (181.86 mg TE/g) in case of fatty samples, and between 176.29 mg AAE/g (41.24 mg TE/g) and 424.91 mg AAE/g (99.40 mg TE/g) in case of defatted samples. The total polyphenol content of the fatty samples changed between 91.16 and 221.81 mg GAE/g; in case of defatted samples, it ranged from 46.01 to 207.68 mg GAE/g. Rhine Riesling contained the greatest amount of these compounds. The functionality of loafs was confirmed by spectrophotometric analysis. Total polyphenol content ranged from 0.91 to 3.16 mg GAE/g in case of wheat loafs, and from 1.39 to 5.92 mg GAE/g in case of gluten-free loafs, while the total antioxidant content changed between 0.70 and 6.44 mg AAE/g in case of wheat loafs, and ranged from 2.55 to 9.75 in case of gluten-free loafs. Graphic abstract

scholarly journals Characterization of fatty acid, antioxidant, and polyphenol content of grape seed oil from different Vitis vinifera L. varieties

OCL ◽  
2021 ◽  
Vol 28 ◽  
pp. 30
Author(s):  
Viktória Kapcsándi ◽  
Erika Hanczné Lakatos ◽  
Beatrix Sik ◽  
László Ádám Linka ◽  
Rita Székelyhidi
Keyword(s):  
Seed Oil ◽  
Grape Seed ◽  
Seed Oils ◽  
Grape Seeds ◽  
Polyphenol Content ◽  
Total Polyphenol ◽  
Total Polyphenol Content ◽  
Grape Seed Oil ◽  
Total Antioxidant ◽  
Grape Varieties

In this study, we examined the yield and oil quality of eight different grape varieties. For the experiments, the grape seeds were obtained from the Benedictine Pannonhalma Archabbey in the northwestern region of Hungary. The aim of the studies was to determine the oil yield obtained by extraction and to examine the differences between the fatty acid composition, antioxidant capacity, and total polyphenol content of the oils of different grape varieties. Based on the results, the oil content of the grape seeds varied between 99.91 g/kg and 126.74 g/kg. The grape seed oils analysed contained significant amounts of stearic acid (3.42–9.93%), palmitic acid (7.81–10.66%), oleic acid (14.29–19.92%), and linoleic acid (66.85–72.47%). Besides, the grape seed oils tested contained several other fatty acids in small amounts. There were significant differences in the total antioxidant and total polyphenol content of the oils. Total polyphenol content ranged from 0.24 to 1.13 mg GAE/g, while the total antioxidant content changed between 0.12 and 0.78 μg TEAC/g. The results show that the studied varieties are suitable for the production of table grape seed oil based on their oil yield, and the oils have favourable, health-protecting properties in terms of their quality.

scholarly journals Screening of Selected Sri Lankan Seasonal Fruit Extracts for Total Antioxidant Activity in vitro

2019 ◽  
Vol 7 (1) ◽  
pp. 7-12
Author(s):  
Amarosige Shanoli Kavindya Fernando ◽  
Anoja Priyadarshani Attanayake ◽  
Kamani Ayoma Perera Wijewardena Jayatilaka
Keyword(s):  
Antioxidant Activity ◽  
Antioxidant Activities ◽  
Dry Weight ◽  
Total Antioxidant Activity ◽  
Polyphenol Content ◽  
Total Polyphenol ◽  
Fruit Extracts ◽  
Total Polyphenol Content ◽  
Total Antioxidant

The present study aimed to determine the total polyphenol content and total antioxidant activities of ten selected seasonal fruit extracts grown in Sri Lanka. The aqueous refluxed fruit extracts (4h) were used at the initial concentration of 0.05 g/mL. The total polyphenol content was determined according to the Folin-Ciocalteu method. The total antioxidant activity was evaluated by DPPH (2, 2-diphenyl-2-picrylhydrazyl), FRAP (ferric reducing power) and TBA (thiobabituric acid assay) assays with L-ascorbic acid as the reference compound. The total polyphenol content of the fruit extracts varied from 0.81±0 to 17.54±0.50 mg GAE (gallic acid equivalents) per gram of dry weight. The antioxidant activities ranged in IC50 of 46.60±0.60 to 367.90 ± 4.90 μg/mL, 3.41±0.02 to 50.46±1.02 µM, 30.62±0.50 to 182.64±0.90 mg AAE (L-ascorbic acid equivalents) per gram of dry weight for DPPH, FRAP, TBA assays, respectively. All aqueous fruit extracts exert dose dependent in vitro antioxidant activities in different degrees. Among the selected fruit extracts S. carophylatum, P. zeylanica, A. comosus exert relatively high total antioxidant activity together with high total polyphenol content. Hence, the selected fruit extracts are deserved to be as potent sources for antioxidant lead compounds in the development of nutraceuticals using the above edible fruits.

scholarly journals Identification and Quantification of Valuable Compounds in Red Grape Seeds

2021 ◽  
Vol 11 (11) ◽  
pp. 5124
Author(s):  
Ovidiu Tița ◽  
Ecaterina Lengyel ◽  
Diana Ionela Stegăruș ◽  
Petre Săvescu ◽  
Alexandru Bogdan Ciubara ◽  
...  
Keyword(s):  
Antioxidant Capacity ◽  
Grape Seeds ◽  
Polyphenol Content ◽  
Total Polyphenol ◽  
Dry Extract ◽  
Average Value ◽  
Total Polyphenol Content ◽  
Three Samples ◽  
Grape Varieties

Grape seeds are a by-product of the wine industry. They represent 38–52% of grape pomace and about 5% of the weight of grapes. The main objective of this study is to establish some important characteristics of grape seeds from red varieties cultivated in Romania. The analyzed grape varieties were Cabernet Sauvignon, Merlot, Pinot noir, Burgund Mare, Cadarcă, Syrah, Novac. The grape seeds were dried and ground and the following determinations were made: determination of total polyphenol content, antioxidant capacity, antiradical capacity and determination of phenolic compounds. The analyses were performed on the first day after obtaining the grape extract, on the 14th day and the 30th day. The obtained results demonstrate that all the analyzed samples have a high content of polyphenols and show antioxidant and antiradical capacity. The highest values were obtained on the first day after separation, drying, grinding and extraction of the grape seeds and began to decrease almost constantly in time, so that for 30 days from storage the values obtained could ensure good operating yields. The seeds from the Novac grape variety obtained the best results throughout the analysis period. In the case of the total polyphenol content, the average value of the three samples Novac was 394.57 mgGAE/g dry extract and the average value of antioxidant capacity was 284.35 mgAAE/g dry extract. The greatest antiradical capacity was presented by the seeds of the Syrah and Novac varieties. The average value of the three samples from the Syrah variety was 62.1%, and in the case of the Novac variety was 61.33%. The paper demonstrates the opportunity of superior capitalization of seeds from the seven grape varieties cultivated on the territory of Romania due to the characteristics it possesses. At present, there is a major interest of consumers in the most natural products, with a major contribution to increasing the body’s immunity. The use of natural compounds in the food and pharmaceutical industry can be an important alternative.

scholarly journals Cultivar influence on total polyphenol and rutin contents and total antioxidant capacity in buckwheat, amaranth, and quinoa seeds

2013 ◽  
Vol 31 (No. 6) ◽  
pp. 589-595 ◽  
Author(s):  
A. Vollmannová ◽  
E. Margitanová ◽  
T. Tóth ◽  
M. Timoracká ◽  
D. Urminská ◽  
...  
Keyword(s):  
Antioxidant Capacity ◽  
Significant Influence ◽  
Spectrophotometric Method ◽  
Total Antioxidant Capacity ◽  
Polyphenol Content ◽  
Total Polyphenol ◽  
Total Polyphenol Content ◽  
Total Antioxidant

Five cultivars from each of the three types of pseudocereals, i.e. buckwheat, amaranth, and quinoa, were studied for total polyphenol and rutin contents as well as total antioxidant capacity of seeds. A spectrophotometric method was used for the determination of total polyphenol content (using the Folin-Ciocalteau reagent) and total antioxidant capacity (using DPPH). Rutin content in pseudocereal seeds was determined by HPLC. The determined total polyphenol content in seeds of buckwheat, amaranth, and quinoa cultivars was in the intervals of 15 874–71 359 mg/kg DM, 1381–2870 mg/kg DM, and 459–1839 mg/kg DM, respectively. Rutin content in buckwheat, amaranth, and quinoa seeds was in the intervals of 8722–17 125 mg/kg DM, 310–508 mg/kg DM, and 170–368 mg/kg DM,respectively. The presented results confirmed a statistically significant influence of cultivar on total polyphenol and rutin contents as well as on total antioxidant capacity of pseudocereal seeds.

Assessment of Antimicrobial Activity and total Polyphenol Content of Rosa multiflora and Rosa wichuraiana

2019 ◽  
Vol 10 (04) ◽  
pp. 646-650
Author(s):  
Hyeusoo Kim ◽  
Kyeong Won Yun
Keyword(s):  
Antimicrobial Activity ◽  
Ethyl Acetate ◽  
Antimicrobial Agents ◽  
Ethyl Acetate Fraction ◽  
Rosa Multiflora ◽  
Polyphenol Content ◽  
Total Polyphenol ◽  
Water Fraction ◽  
Total Polyphenol Content ◽  
Rosa Species

The fruit of Rosa multiflora has been used as traditional herbal medicine in Asian countries. The present investigation was undertaken to study the antimicrobial activity and total polyphenol content of hexane, ether, ethyl acetate, water fraction of methanol extract of fruit and flower from Rosa multiflora and Rosa wichuraiana. Antimicrobial activity of the mentioned fractions against 3 gram-positive and 4 gram-negative bacteria using disk diffussion method. The measurement of minimal inhibition concentration (MIC) showed that the ethyl acetate fraction of the two Rosa species is the most effective against the tested bacteria. The total polyphenol content of ethyl acetate fraction of the two Rosa species is higher than the other fractions. The results indicate the antimicrobial activity was related with the total polyphenol content and the fruit and flower of the two Rosa species can be considered as a natural source of antimicrobial agents.

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