scholarly journals Methods for the Evaluation of Polyphenolic Content in “Uva Di Troia Canosina” Grape and Seeds at the Different Maceration Stages

2013 ◽  
Vol 2013 ◽  
pp. 1-9
Author(s):  
Daria Catalano ◽  
Sergio Fontana ◽  
Gabriella Roda ◽  
Lucia Dell'Acqua ◽  
Flavia La Forgia ◽  
...  
Keyword(s):  
Fermentation Process ◽  
Antioxidant Properties ◽  
Grape Seed ◽  
Extraction Yield ◽  
Single Step ◽  
Grape Skin ◽  
South Italy ◽  
Polyphenolic Content ◽  
Seed Extraction ◽  
Seed Extracts

Seeds and skins derived from the small berries of “uva di Troia canosina” grape, a Vitis vinifera variety autochthonous of Apulia region (South Italy), collected at four different stages (“Tesi” 1–4) of the fermentation process were extracted by means of a maceration. The extracts were purified and analyzed, in order to study the influence of fermentation over grape seed and skin polyphenolic content. Seed extraction was performed by a multistep maceration with two solvents: ethanol and acetone, the former giving the best results; moreover, the extracts were purified with pure ethyl acetate in order to enrich their polyphenolic content. On the other hand, skin extraction was achieved by a single-step maceration in methanol and a purification with a brominated synthetic adsorbent resin. The evaluation of the extraction yield and polyphenolic content was carried out by TLC, UV/VIS, and LC/DAD analyses. In the seed extracts, the characteristic polyphenols (catechin, epicatechin, and procyanidin B1 and B2) useful for the development of a nutraceutical product, endowed with antioxidant properties, were present, while no resveratrol was detected in “uva di Troia canosina” grape skin extracts, even in an LC/MS-MS analysis.

scholarly journals Total content of phenols and antioxidant activity of grape skins and seeds cabernet sauvignon cultivated in Valle de Guadalupe, Baja California, México

2019 ◽  
Vol 15 ◽  
pp. 04001 ◽  
Author(s):  
L. Castro-López ◽  
G. Castillo-Sánchez ◽  
L. Díaz-Rubio ◽  
I. Córdova-Guerrero
Keyword(s):  
Antioxidant Capacity ◽  
Gallic Acid ◽  
Total Content ◽  
Grape Seed ◽  
Total Phenolic ◽  
Cabernet Sauvignon ◽  
Grape Skin ◽  
Total Antioxidant ◽  
Grape Skins ◽  
Seed Extracts

The evaluation of the antioxidant capacity of grape cultivars Cabernet sauvignon is important because it varies according to the production area. In this work, it was evaluated the content of phenolic compounds and the total antioxidant capacity (CAT) of grape skins and grape seed Cabernet sauvignon (Vitis vinifera L.) in three vineyards located in the Valley of Guadalupe, B.C, México. The content of total phenols was determined by the Folin-Ciocalteau method and the CAT of grape skin and seed extracts by the stabilization methods of the (ABTS•+) and DPPH• radicals. The CAT in the seed extracts was increased (P < 0.05) in the following order: vineyard 2 < vineyard 1 < vineyard 3. The highest contents of gallic acid, resveratrol and rutin were found in the extracts that presented the highest CAT, which corresponded to the cultivars of vineyard 3. The same happened in extract of skins, having vineyard 3 the contents of CAT (ABTS•+) higher. The total phenolic seed compound was presented in vineyard 2 with 1,545, followed by vineyard 1 with 1,523, vineyard 3 with 1,146 expressed as g GAE.100 g of sample. In skin, the behavior was as follows; vineyard 3 <vineyard 2 <vineyard 1. 1,062, 1,086, 1,115 expressed as g GAE.100 g sample respectively.Keywords: antioxidant, phenolics, ABTS, gallic acid.

scholarly journals Potential Anticancer Properties of Grape Antioxidants

2012 ◽  
Vol 2012 ◽  
pp. 1-8 ◽  
Author(s):  
Kequan Zhou ◽  
Julian J. Raffoul
Keyword(s):  
Antioxidant Properties ◽  
Radical Scavenging ◽  
Grape Juice ◽  
Phenolic Antioxidants ◽  
Protective Effects ◽  
Exciting Field ◽  
Grape Skin ◽  
Seed Extracts

Dietary intake of foods rich in antioxidant properties is suggested to be cancer protective. Foods rich in antioxidant properties include grape (Vitis vinifera), one of the world’s largest fruit crops and most commonly consumed fruits in the world. The composition and cancer-protective effects of major phenolic antioxidants in grape skin and seed extracts are discussed in this review. Grape skin and seed extracts exert strong free radical scavenging and chelating activities and inhibit lipid oxidation in various food and cell modelsin vitro. The use of grape antioxidants are promising against a broad range of cancer cells by targeting epidermal growth factor receptor (EGFR) and its downstream pathways, inhibiting over-expression of COX-2 and prostaglandin E2 receptors, or modifying estrogen receptor pathways, resulting in cell cycle arrest and apoptosis. Interestingly, some of these activities were also demonstrated in animal models. However,in vivostudies have demonstrated inconsistent antioxidant efficacy. Nonetheless, a growing body of evidence from human clinical trials has demonstrated that consumption of grape, wine and grape juice exerts many health-promoting and possible anti-cancer effects. Thus, grape skin and seed extracts have great potential in cancer prevention and further investigation into this exciting field is warranted.

scholarly journals Optimized Supercritical CO2 Extraction Enhances the Recovery of Valuable Lipophilic Antioxidants and Other Constituents from Dual-Purpose Hop (Humulus lupulus L.) Variety Ella

Antioxidants ◽  
2021 ◽  
Vol 10 (6) ◽  
pp. 918
Author(s):  
Nóra Emilia Nagybákay ◽  
Michail Syrpas ◽  
Vaiva Vilimaitė ◽  
Laura Tamkutė ◽  
Audrius Pukalskas ◽  
...  
Keyword(s):  
Supercritical Co2 ◽  
Antioxidant Properties ◽  
Extraction Yield ◽  
Biologically Active ◽  
High Yield ◽  
Acid Extraction ◽  
Supercritical Co2 Extraction ◽  
Bioactive Constituents ◽  
Total Extract

The article presents the optimization of supercritical CO2 extraction (SFE-CO2) parameters using response surface methodology (RSM) with central composite design (CCD) in order to produce single variety hop (cv. Ella) extracts with high yield and strong in vitro antioxidant properties. Optimized SFE-CO2 (37 MPa, 43 °C, 80 min) yielded 26.3 g/100 g pellets of lipophilic fraction. This extract was rich in biologically active α- and β-bitter acids (522.8 and 345.0 mg/g extract, respectively), and exerted 1481 mg TE/g extract in vitro oxygen radical absorbance capacity (ORAC). Up to ~3-fold higher extraction yield, antioxidant recovery (389.8 mg TE/g pellets) and exhaustive bitter acid extraction (228.4 mg/g pellets) were achieved under the significantly shorter time compared to the commercially used one-stage SFE-CO2 at 10–15 MPa and 40 °C. Total carotenoid and chlorophyll content was negligible, amounting to <0.04% of the total extract mass. Fruity, herbal, spicy and woody odor of extracts could be attributed to the major identified volatiles, namely β-pinene, β-myrcene, β-humulene, α-humulene, α-selinene and methyl-4-decenoate. Rich in valuable bioactive constituents and flavor compounds, cv. Ella hop SFE-CO2 extracts could find multipurpose applications in food, pharmaceutical, nutraceutical and cosmetics industries.

Graphene oxide/polyethylene glycol aerogel reinforced with grape seed extracts as wound dressing

2021 ◽  
Author(s):  
Jessica Borges-Vilches ◽  
Javiera Poblete ◽  
Fernando Gajardo ◽  
Claudio Aguayo ◽  
Katherina Fernández
Keyword(s):  
Graphene Oxide ◽  
Polyethylene Glycol ◽  
Wound Dressing ◽  
Grape Seed ◽  
Grape Seed Extracts ◽  
Seed Extracts

scholarly journals Comparative Study on Seed Characteristics, Antioxidant Activity, and Total Phenolic and Flavonoid Contents in Accessions of Sorghum bicolor (L.) Moench

Molecules ◽  
2021 ◽  
Vol 26 (13) ◽  
pp. 3964
Author(s):  
Bimal-Kumar Ghimire ◽  
Ji-Won Seo ◽  
Chang-Yeon Yu ◽  
Seung-Hyun Kim ◽  
Ill-Min Chung
Keyword(s):  
Antioxidant Activity ◽  
Agronomic Traits ◽  
Germination Rate ◽  
Antioxidant Properties ◽  
Radical Scavenging ◽  
Extensive Study ◽  
Total Phenolic ◽  
Phytochemical Content ◽  
Seed Characteristics ◽  
Seed Extracts

Sorghum is a major cereal food worldwide, and is considered a potential source of minerals and bioactive compounds. Its wide adaptive range may cause variations in its agronomic traits, antioxidant properties, and phytochemical content. This extensive study investigated variations in seed characteristics, antioxidant properties, and total phenolic (TPC) and flavonoid contents (TFC) of sorghum collected from different ecological regions of 15 countries. The antioxidant potential of the seed extracts of various sorghum accessions was determined using 1,1-diphenyl-2-picrylhydrazyl (DPPH) and 2,2′-azinobis 3-ethylbenzothiazoline-6-sulfonate (ABTS) radical scavenging assays. Significant variations in TPC were observed among the sorghum accessions. All 78 sorghum accessions used in this study exhibited significant variations in TFC, with the lowest and highest amount observed in accessions C465 and J542, respectively. DPPH scavenging potential of the seed extracts for all the accessions ranged from 11.91 ± 4.83 to 1343.90 ± 81.02 µg mL−1. The ABTS assay results were similar to those of DPPH but showed some differences in the accessions. Pearson’s correlation analysis revealed a wide variation range in the correlation between antioxidant activity and TPC, as well as TFC, among the sorghum accessions. A wide diversity range was also recorded for the seed characteristics (1000-seed weight and seed germination rate). A dendrogram generated from UPGMA clustering, based on seed traits, antioxidant activity, TPC, and TFC was highly dispersed for these accessions. Variations among the accessions may provide useful information regarding the phytoconstituents, antioxidant properties, and phytochemical contents of sorghum and aid in designing breeding programs to obtain sorghum with improved agronomic traits and bioactive properties.

Synthesis of Methacrylic−Ferulic Acid Copolymer with Antioxidant Properties by Single-Step Free Radical Polymerization

2008 ◽  
Vol 56 (22) ◽  
pp. 10646-10650 ◽  
Author(s):  
Francesco Puoci ◽  
Francesca Iemma ◽  
Manuela Curcio ◽  
Ortensia I. Parisi ◽  
Giuseppe Cirillo ◽  
...  
Keyword(s):  
Free Radical ◽  
Ferulic Acid ◽  
Radical Polymerization ◽  
Antioxidant Properties ◽  
Free Radical Polymerization ◽  
Single Step ◽  
Acid Copolymer

Serial Extraction Technique of Rich Antibacterial Compounds in Sargassum cristaefolium Using Different Solvents and Testing their Activity

2021 ◽  
Vol 17 ◽  
Author(s):  
Bambang Susilo ◽  
Abd. Rohim ◽  
Midia Lestari W. H.
Keyword(s):  
Antibacterial Activity ◽  
Brown Seaweed ◽  
Inhibition Zone ◽  
Extraction Yield ◽  
Single Step ◽  
Extraction Technique ◽  
Cinnamic Aldehyde ◽  
Antibacterial Compounds ◽  
Ft Ir ◽  
Aldehyde Groups

Background: S. cristaefolium is the brown seaweed extracted using the serial technique with different solvents. Methods: S. cristaefolium powder (50 mesh) was extracted with hexane, ethyl acetate, and methanol respectively. The S. cristaefolium powder residue had been dried before being re-extracted with the next different solvents. Three serial extracts were obtained and named as the 1-stage extract, 2-stage extract, and 3-stage extract. Besides, a single-step extract (extraction using only methanol) was also produced to compare with three serial extracts in antibacterial activity tests (against E. coli and S. aureus). The three serial extracts were detected their antibacterial compounds using GC-MS, LC-HRMS, and FT-IR. Results: The 3-stage extract had the highest extraction yield. On S. aureus, the inhibition zone in all extracts was not significantly different. On E.coli, the highest inhibition zone (5.42±0.14 mm) was the 3-stage extract, indeed it is higher than both antibiotic and a single-step extract. Phenol, 9-Tricosene(Z)-, palmitic acid, and oleamide were contained in all extracts. Other antibacterial compound types, both the 1-stage and 2-stage extracts contained 8 types whilst the 3-stage extract contained the most types (12 types). Particularly, hexyl cinnamic aldehyde and betaine were detected only in the 3-stage extract with the dominant area. The carboxylic acid groups were detected in all extracts to confirm the fatty acid structure. Several cinnamic aldehyde groups were detected only in the 3-stage extract. Conclusions: Thus, the extraction technique serially could produce the 3-stage extract which has the strongest antibacterial activity and the richest antibacterial compounds.

Grape seed extracts attenuate retinal Müller cell gliosis in streptozotocin-diabetic rats

2018 ◽  
Vol 50 ◽  
pp. 45-52 ◽  
Author(s):  
Zhihan Xu ◽  
Zeying Chu ◽  
Weinan Li ◽  
Tao Sun ◽  
Xiangjun Sun
Keyword(s):  
Grape Seed ◽  
Diabetic Rats ◽  
Müller Cell ◽  
Streptozotocin Diabetic Rats ◽  
Muller Cell ◽  
Grape Seed Extracts ◽  
Seed Extracts

scholarly journals In Vitro Antioxidant and Antiproliferative Efficacy of Abrus Precatorius Seed Extracts on Hep2c Cells and its Inhibitory Efficacy with Receptors of Cervical Carcinoma

2022 ◽  
Author(s):  
Amritpal Kaur ◽  
Yash Sharma ◽  
Kamran Waidha ◽  
Madhumita P Ghosh ◽  
Anoop Kumar ◽  
...  
Keyword(s):  
Tannic Acid ◽  
Herbal Remedy ◽  
Antioxidant Properties ◽  
Radical Scavenging ◽  
Seed Extract ◽  
Total Phenolic ◽  
Cervix Carcinoma ◽  
Abrus Precatorius ◽  
Ic50 Value ◽  
Seed Extracts

Abstract Abrus precatorius is a widely distributed tropical medicinal plant with several therapeutic properties, however its seed extract has not been studied against cervical cancer (CaCx) till date. Herein, we have assessed the antioxidant and antiproliferative properties of A. precatorius seed extracts (ethyl acetate and 70% ethanol) prepared from different extraction methods (Soxhlet and maceration) against human cervix carcinoma cells (Hep2C). We observed a significantly higher total flavonoid content of APE (sox) i.e.,112.7±0.127 mg Quercetin Equivalent/g of extract than others; total phenolic content of APA (mac) seed extract was higher i.e.,108.53±0.089 mg Quercetin Equivalent/g of extract and total tannin content of APA (sox) was higher i.e., 98.98± 0.011 mg tannic acid equivalents/g of extract. In addition, tannic acid, rutin and piperine were identified in extracts by HPLC. Furthermore, APA (sox) exhibited the highest radical scavenging activity with an IC50 value of 14.49±0.93µg/ml. APE (mac) showed the most significant antiproliferative activity with IC50 value of 85.90±0.93µg/mL against Hep2c cells. SOD and GST activity was observed as highest in the APA(Mac) extract whereas the catalase activity and GSH content was maximum in the APE(Mac) extract. Further, the MDA content was observed to be the least in APE(Mac) extracts. Docking results suggested maximum binding energy between tannic acid and Her2 receptor compared to doxorubicin (standard). This study provides evidence that A. precatorius seed extracts possess promising bioactive compounds with probable anticancer and antioxidant properties against CaCx which might be utilized as a possible herbal remedy aimed at restricting tumor growth.

scholarly journals Solid Lipid Nanoparticles Administering Antioxidant Grape Seed-Derived Polyphenol Compounds: A Potential Application in Aquaculture

Molecules ◽  
2022 ◽  
Vol 27 (2) ◽  
pp. 344
Author(s):  
Adriana Trapani ◽  
María Ángeles Esteban ◽  
Francesca Curci ◽  
Daniela Erminia Manno ◽  
Antonio Serra ◽  
...  
Keyword(s):  
Solid Lipid Nanoparticles ◽  
Antioxidant Properties ◽  
Grape Seed ◽  
Lipid Nanoparticles ◽  
Antioxidant Compounds ◽  
Gilthead Seabream ◽  
Antioxidant Genes ◽  
Solid Lipid ◽  
Antioxidant Agents ◽  
Fish Cells

The supply of nutrients, such as antioxidant agents, to fish cells still represents a challenge in aquaculture. In this context, we investigated solid lipid nanoparticles (SLN) composed of a combination of Gelucire® 50/13 and Precirol® ATO5 to administer a grape seed extract (GSE) mixture containing several antioxidant compounds. The combination of the two lipids for the SLN formation resulted in colloids exhibiting mean particle sizes in the range 139–283 nm and zeta potential values in the range +25.6–43.4 mV. Raman spectra and X-ray diffraction evidenced structural differences between the free GSE and GSE-loaded SLN, leading to the conclusion that GSE alters the structure of the lipid nanocarriers. From a biological viewpoint, cell lines from gilthead seabream and European sea bass were exposed to different concentrations of GSE-SLN for 24 h. In general, at appropriate concentrations, GSE-SLN increased the viability of the fish cells. Furthermore, regarding the gene expression in those cells, the expression of antioxidant genes was upregulated, whereas the expression of hsp70 and other genes related to the cytoskeleton was downregulated. Hence, an SLN formulation containing Gelucire® 50/13/Precirol® ATO5 and GSE may represent a compelling platform for improving the viability and antioxidant properties of fish cells.

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