scholarly journals Antioxidant Potential of Grass Pea Seeds from European Countries

Foods ◽  
2018 ◽  
Vol 7 (9) ◽  
pp. 142 ◽  
Author(s):  
Wojciech Rybiński ◽  
Magdalena Karamać ◽  
Katarzyna Sulewska ◽  
Andreas Börner ◽  
Ryszard Amarowicz
Keyword(s):  
Phenolic Compounds ◽  
Total Phenolics ◽  
Trolox Equivalent Antioxidant Capacity ◽  
Total Phenolic ◽  
Grass Pea ◽  
Antioxidant Power ◽  
Phenolic Contents ◽  
Trolox Equivalent ◽  
Ferric Reducing Antioxidant Power ◽  
Derivatives Of

Phenolic compounds were extracted from seeds of 30 varieties of grass pea (Lathyrus sativus) into 80% (v/v) methanol. The total phenolics compounds content of the extracts and their antioxidant activity were determined using Folin-Ciocalteu’s phenol reagent and 2,2′-azinobis-(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS) and ferric-reducing antioxidant power (FRAP) methods, respectively. Total phenolic contents ranged from 1.88 to 7.12 mg/g extract and 20.3 to 70.3 mg/100 g seeds. The extracts and seeds were characterized using Trolox equivalent antioxidant capacity values of 0.015–0.037 mmol Trolox/g extract and 0.158–0.372 mmol Trolox/100 g seeds, and FRAP values of 0.045–0.120 mmol Fe2+/g extract and 0.487–1.189 Fe2+/100 g seeds. The total phenolics content of grass pea extract was correlated with the results of the ABTS (r = 0.881) and FRAP (r = 0.781) assays. The same correlation was observed between the results of both assays (r = 0.842). Two derivatives of p-coumaric acid were the dominant phenolic compounds of the Derek cultivar of grass pea.

scholarly journals Antioxidant capacity of Lathyrus sativus seeds

2020 ◽  
Vol 11 ◽  
Author(s):  
Wojciech Rybiński ◽  
Magdalena Karamać ◽  
Michał Janiak ◽  
Andreas Börner ◽  
Natalia Płatosz ◽  
...  
Keyword(s):  
Phenolic Compounds ◽  
Antioxidant Capacity ◽  
Phenolic Acids ◽  
Total Phenolics ◽  
Trolox Equivalent Antioxidant Capacity ◽  
Total Phenolic ◽  
Grass Pea ◽  
Phenolic Contents ◽  
Trolox Equivalent ◽  
Pea Seeds

Grass pea seeds of 30 varieties from Poland, Slovakia, Czech, Russia, Ukraine, Hungary, Bulgaria, India, Iran, Tunisia, Ethiopia, Canada, and Chile were investigated. Phenolic compounds were extracted from seeds into 80% (v/v) methanol. The total phenolics compounds content of the extracts was determined using Folin-Ciocalteu’s phenol reagent. The antioxidant activity was determined using ABTS and FRAP assays. Total phenolic contents ranged from 2.74 to 10.7 mg/g extract and from 35.9 to 144.7 mg/100 g seeds. The extracts and seeds were characterized using Trolox equivalent antioxidant capacity values of 0.014–0.060 mmol Trolox/g extract and 0.188–0.866 mmol Trolox/100 g seeds, and FRAP values of 0.188–0.866 mmol Fe2+/g extract and 0.541–1.398 Fe2+/100 g seeds. The total phenolics content of grass pea extract was correlated with the results of the ABTS (r = 0.854) and FRAP (r = 0.958) assays. A similar correlation existed between the results of both assays (r = 0.890). Phenolic acids were the dominant phenolic compounds of two cultivars of grass pea. Syringic and sinapic acids had the highest amounts while ferulic, p-hydroxybenzoic, protocatechuic, and p-coumaric acids were present in much lower quantitie. Phenolic acids were present in the form of free compounds, esters, and glycosides.

scholarly journals Phenolic Profiles and Antioxidant Activities of 30 Tea Infusions from Green, Black, Oolong, White, Yellow and Dark Teas

Antioxidants ◽  
2019 ◽  
Vol 8 (7) ◽  
pp. 215 ◽  
Author(s):  
Cai-Ning Zhao ◽  
Guo-Yi Tang ◽  
Shi-Yu Cao ◽  
Xiao-Yu Xu ◽  
Ren-You Gan ◽  
...  
Keyword(s):  
Antioxidant Activities ◽  
Dry Weight ◽  
Trolox Equivalent Antioxidant Capacity ◽  
Total Phenolic ◽  
Antioxidant Power ◽  
Phenolic Contents ◽  
Tea Infusions ◽  
Phenolic Profiles ◽  
Trolox Equivalent ◽  
Ferric Reducing Antioxidant Power

Tea is among the most consumed drink worldwide, and its strong antioxidant activity is considered as the main contributor to several health benefits, such as cardiovascular protection and anticancer effect. In this study, the antioxidant activities of 30 tea infusions, which were obtained by the mimic of drinking tea of the public, from green, black, oolong, white, yellow and dark teas, were evaluated using ferric-reducing antioxidant power (FRAP) and Trolox equivalent antioxidant capacity (TEAC) assays, ranging from 504.80 ± 17.44 to 4647.47 ± 57.87 µmol Fe2+/g dry weight (DW) and 166.29 ± 24.48 to 2532.41 ± 50.18 µmol Trolox/g DW, respectively. Moreover, their total phenolic contents (TPC) were detected by Folin-Ciocalteu assay and were in the range of 24.77 ± 2.02 to 252.65 ± 4.74 mg gallic acid equivalent (GAE)/g DW. Generally, Dianqing Tea, Lushan Yunwu Tea, and Xihu Longjing Tea showed the strongest antioxidant activities among 30 teas. Furthermore, the phenolic compounds in tea infusions were identified and quantified, with catechins most commonly detected, especially in green tea infusions, which were main contributors to their antioxidant activities. Besides tea polyphenols, considerable content of caffeine also presented in 30 tea infusions.

scholarly journals Phytochemical Composition and Antioxidant Capacity of 30 Chinese Teas

Antioxidants ◽  
2019 ◽  
Vol 8 (6) ◽  
pp. 180 ◽  
Author(s):  
Guo-Yi Tang ◽  
Cai-Ning Zhao ◽  
Xiao-Yu Xu ◽  
Ren-You Gan ◽  
Shi-Yu Cao ◽  
...  
Keyword(s):  
Antioxidant Capacity ◽  
High Performance ◽  
Food Additives ◽  
Water Soluble ◽  
Trolox Equivalent Antioxidant Capacity ◽  
Total Phenolic ◽  
Antioxidant Compounds ◽  
Antioxidant Power ◽  
Phenolic Contents ◽  
Trolox Equivalent

Tea has been reported to prevent and manage many chronic diseases, such as cancer, diabetes, obesity, and cardiovascular diseases, and the antioxidant capacity of tea may be responsible for these health benefits. In this study, the antioxidant capacities of fat-soluble, water-soluble, and bound-insoluble fractions of 30 Chinese teas belonging to six categories, namely green, black, oolong, dark, white, and yellow teas, were systematically evaluated, applying ferric-reducing antioxidant power and Trolox equivalent antioxidant capacity assays. In addition, total phenolic contents of teas were determined by Folin–Ciocalteu method, and the contents of 18 main phytochemical compounds in teas were measured by high-performance liquid chromatography (HPLC). The results found that several teas possessed very strong antioxidant capacity, and caffeine, theaflavine, gallic acid, chlorogenic acid, ellagic acid, and kaempferol-3-O-glucoside, as well as eight catechins, were the main antioxidant compounds in them. Thus, these teas could be good natural sources of dietary antioxidants, and their extracts might be developed as food additives, nutraceuticals, cosmetics, and pharmaceuticals.

scholarly journals Phenolic Fingerprinting, Antioxidant, and Deterrent Potentials of Persicaria maculosa Extracts

Molecules ◽  
2020 ◽  
Vol 25 (13) ◽  
pp. 3054 ◽  
Author(s):  
Luisa Quesada-Romero ◽  
Carlos Fernández-Galleguillos ◽  
Jan Bergmann ◽  
María-Eugenia Amorós ◽  
Felipe Jiménez-Aspee ◽  
...  
Keyword(s):  
Phenolic Compounds ◽  
Antioxidant Capacity ◽  
Macrosiphum Euphorbiae ◽  
Total Phenolic ◽  
Phenolic Profile ◽  
Antioxidant Power ◽  
Aerial Parts ◽  
Ferric Reducing Antioxidant Power ◽  
First Time ◽  
Derivatives Of

Persicaria maculosa (Polygonaceae) (known as lady’s thumb) is an annual morphologically variable weed that is widely distributed in Chile. The purpose of this study was to investigate the antifeedant potential of methanolic (MeOH), ethanolic (EtOH), and dichloromethane (DCM) extracts from the aerial parts of this plant collected in the Valparaíso and Curicó provinces (Chile) and relate this activity to the antioxidant capacity and the presence of phenolic compounds in the extracts. A phenolic profile based on HPLC-ESI-MS/MS allowed the identification of 26 phenolic compounds, most of them glycosyl derivatives of isorhamnetin, quercetin, and kaempferol. In addition, the total phenolic content (TP), total flavonoids (TF), and antioxidant activity measured by 2,2-diphenyl-1-picrylhydrazyl (DPPH), superoxide anion scavenging (O2−), ferric-reducing antioxidant power (FRAP), and cupric-reducing antioxidant capacity (CUPRAC) of the extracts are reported. The antifeedant potentials of the plant extracts were tested against Epilachna paenulata, Pseudaletia adultera, Macrosiphum euphorbiae, and Diaphorina citri insects for the first time. The activity against the aphid M. euphorbiae was significant for the DCM extracts of plants from Valparaíso and Curicó (settling % = 23% ± 4% and 23% ± 5%, respectively). The antifeedant activities against the beetle E. paenulata and the lepidoptera P. adultera were significant for Valparaíso extracts, especially when tested against E. Paenulata (IFP = 1.0 ± 0.0). Finally, the MeOH and EtOH extracts from Valparaíso plants reduced the diet consumption of the psilid D. citri (p < 0.05). The results showed that P. maculosa is a good source of flavonoids with some antioxidant capacities and has potential interest as botanical eco-friendly alternative with deterrent activity.

scholarly journals Fermentation with Tea Residues Enhances Antioxidant Activities and Polyphenol Contents in Kombucha Beverages

Antioxidants ◽  
2022 ◽  
Vol 11 (1) ◽  
pp. 155
Author(s):  
Dan-Dan Zhou ◽  
Adila Saimaiti ◽  
Min Luo ◽  
Si-Yu Huang ◽  
Ruo-Gu Xiong ◽  
...  
Keyword(s):  
Green Tea ◽  
High Performance ◽  
Antioxidant Activities ◽  
Black Tea ◽  
Trolox Equivalent Antioxidant Capacity ◽  
Total Phenolic ◽  
Array Detector ◽  
Antioxidant Power ◽  
Phenolic Contents ◽  
Trolox Equivalent

Kombucha is a popular beverage with various bioactivities (such as antioxidant activity), which can be attributed to its abundant bioactive compounds, especially polyphenols. Kombucha is conventionally prepared by fermentation of a sugared black tea infusion without tea residue. In this study, the effects of black tea residue and green tea residue on kombucha were studied, and its antioxidant activities, total phenolic contents, as well as concentrations of polyphenols at different fermentation stages were evaluated using ferric-reducing antioxidant power, Trolox equivalent antioxidant capacity, Folin-Ciocalteu method and high-performance liquid chromatography with a photodiode array detector. The results showed that fermentation with tea residue could markedly increase antioxidant activities (maximum 3.25 times) as well as polyphenolic concentrations (5.68 times) of kombucha. In addition, green tea residue showed a stronger effect than black tea residue. Overall, it is interesting to find that fermentation with tea residues could be a better strategy to produce polyphenol-rich kombucha beverages.

scholarly journals Serbian aromatized wine “Bermet”: Electrochemical, chemiluminescent and spectrophotometric determination of antioxidant activity

2020 ◽  
Vol 85 (4) ◽  
pp. 517-529
Author(s):  
Stanislava Gorjanovic ◽  
Ferenc Pastor ◽  
Sofia Loupassaki ◽  
Mile Veljovic ◽  
Predrag Vukosavljevic ◽  
...  
Keyword(s):  
Antioxidant Capacity ◽  
Integrated Approach ◽  
Trolox Equivalent Antioxidant Capacity ◽  
Total Phenolic ◽  
Equal Weight ◽  
Antioxidant Power ◽  
15Th Century ◽  
Traditional Procedure ◽  
Trolox Equivalent ◽  
Ferric Reducing Antioxidant Power

Serbian aromatized wine ?Bermet? from grapes grown on Fruska Gora Mountain has been in production since the 15th century. Ten commercial Bermets produced according to the traditional procedure by different manufacturers, and six prepared within the scope of this study were assessed for antioxidant (AO) activity using electrochemical, chemiluminescent and spectrophotometric AO assays. Direct current polarographic assay based on the decrease of anodic current of [hydrogen(peroxido)(1-)]hydroxidomercury(II) complex formation in alkaline H2O2 solution at potential of mercury oxidation, chemiluminescent H2O2 scavenging assay, as well as commonly used spectrophotometric assays (2,2?-azinobis-(3-ethylbenzothiazoline-6-sulfonic acid (ABTS) based Trolox equivalent antioxidant capacity (TEAC), 2,2-diphenyl-1- picrylhydrazyl (DPPH) and ferric reducing antioxidant power (FRAP)) were used. Total phenolic content (TPC) was determined by Folin?Ciocalteu assay. The results obtained were correlated using regression analysis, ANOVA and F-test. An integrated approach to AO capacity determination allowed a more comprehensive comparison between samples. The approach is based on the introduction of the relative antioxidant capacity index, calculated by assigning each AO assay equal weight, and by PCA analysis. In addition, the introduction of phenolic antioxidant coefficients, calculated as the ratio between individual AO capacity and TPC, enabled a better understanding of their relation.

scholarly journals Antioxidant activities and inhibitory effects of free and bound polyphenols from date (Phoenix dactylifera L.) seeds on starch digestive enzymes

2016 ◽  
Vol 5 (2) ◽  
Author(s):  
Sameera Sirisena ◽  
Ken Ng ◽  
Said Ajlouni
Keyword(s):  
Antioxidant Activities ◽  
Phoenix Dactylifera ◽  
Trolox Equivalent Antioxidant Capacity ◽  
Total Phenolic ◽  
Antioxidant Power ◽  
Food Ingredients ◽  
Phoenix Dactylifera L ◽  
Trolox Equivalent ◽  
Ferric Reducing Antioxidant Power

Date (Phoenix dactylifera L.) seeds have gained interest as a valuable by-product of  the date fruit industry and have been identified as a rich source of functional and bioactive ingredients. In this study, date seeds from five varieties (Medjool, Deglet Nour, Barhee, Bou Sthammi and Dayrie) cultivated in Australia were analysed for their total phenolic and flavonoid contents, ferric reducing antioxidant power (FRAP), Trolox equivalent antioxidant capacity (TEAC), and in-vitro inhibition against α-amylase and α-glucosidase. The date seed powders (DSP) were extracted with acetone-methanol-water (2:2:1, v:v:v) to obtain free polyphenols.  The bound polyphenols were extracted from the residual solids with butanol-HCl (97.5:2.5; v/v) treatment at 100 °C. The greatest quantities of total phenols (4166±227 mg Gallic Acid Equivalents 100g-1 DSP), total flavonoids (52.1±9.6 mg Quercetin Equivalents 100g-1 DSP), FRAP (1589±47 µmol Iron[II] Equivalents g-1 DSP) and TEAC (45.2±1.4 µmol Trolox Equivalents g-1 DSP) were detected in seeds from Deglet Nour variety. Both free and bound polyphenol fractions showed significant (p<0.05) inhibition against rat intestinal α-glucosidase with little or no inhibition against pancreatic α-amylase. Bound polyphenols showed stronger α-glucosidase inhibition compared with free polyphenols.  The IC50 for α-glucosidase were reported as mg GAE mL-1 ranged from 0.39±0.02 (Deglet Nour) to 0.68±0.02 (Medjool) for bound polyphenols, and from 0.907±0.08 (Medjool) to 1.75±0.15 (Barhee-khalal) for free polyphenols. Bound polyphenol fraction, with strong α-glucosidase inhibition and weak α-amylase inhibition, was suggested as a significant source of functional food ingredients with anti-hyperglycaemic properties.

scholarly journals Changes in the Total Polyphenolic Content and Antioxidant Capacities of Perilla (Perilla frutescensL.) Plant Extracts during the Growth Cycle

2017 ◽  
Vol 2017 ◽  
pp. 1-8 ◽  
Author(s):  
Francesco Gai ◽  
Pier Giorgio Peiretti ◽  
Magdalena Karamać ◽  
Ryszard Amarowicz
Keyword(s):  
Phenolic Compound ◽  
Growth Cycle ◽  
Vegetative Stage ◽  
Trolox Equivalent Antioxidant Capacity ◽  
Total Phenolic ◽  
Growth Stages ◽  
Antioxidant Power ◽  
Full Flowering ◽  
Trolox Equivalent ◽  
Ferric Reducing Antioxidant Power

Changes in the total polyphenolics and antioxidative capacity of the perilla (Perilla frutescensL.) plant, during the growth cycle, have been analyzed in this study. These parameters were evaluated at five morphological stages. The extracts characterized by the highest total phenolic compound content were obtained at the full flowering stage. The phenolic compound profile was characterized by the presence of three major compounds, with rosmarinic acid being the most abundant. Moreover, their contents were significantly different according to the growth stage. High Trolox equivalent antioxidant capacity values were found for the last two growth stages. The lowest ferric-reducing antioxidant power value was observed for the medium vegetative stage. The highest antiradical activity against DPPH•was observed for extracts obtained from the early vegetative stage. The antioxidant activity changes during the growth cycle, and this change may be useful to determine the optimal harvest time.

scholarly journals Comparative Evaluation of Argania spinosa and Olea europaea Leaf Phenolic Compounds and their Antioxidant Activity

Botanica ◽  
2020 ◽  
Vol 26 (1) ◽  
pp. 76-87
Author(s):  
Aziza Lfitat ◽  
Hind Zejli ◽  
Abdelkamel Bousselham ◽  
Yassine El Atki ◽  
Badiaa Lyoussi ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Phenolic Compounds ◽  
Radical Scavenging Activity ◽  
Radical Scavenging ◽  
Total Phenolic ◽  
Olive Leaves ◽  
Antioxidant Power ◽  
Ferric Reducing Antioxidant Power ◽  
Total Flavonoids Content

AbstractWe conducted this study to determine and compare the content of phenolic compounds and flavonoids in the argan and olive leaves as well as their antioxidant capacity in aqueous, methanolic, and ethyl acetate extracted fractions. In vitro antioxidant activity was evaluated in comparison with synthetic antioxidants by assessing DPPH• radical scavenging capacity, ferric reducing antioxidant power, scavenging ability by inhibiting the β-carotene/linoleic acid emulsion oxidation, and by the ABTS radical scavenging activity assay. Total phenolic content in argan samples ranged from 221.69 ± 2.07 to 1.32 ± 0.01 mg GAE/g DW and in olive samples from 144.61 ± 0.82 to 1.21 ± 0.02 mg GAE/g DW. Total flavonoids content in argan samples varied from 267.37 ± 1.12 to 25.48 ± 0.02 mg QE/g DW, while in olives from 96.06 ± 0.78 to 10.63 ± 0.05 mg QE/g DW. In vitro antioxidant studies strongly confirmed the antioxidant potency of argan and olive leaves and their richness in secondary metabolites that are effective in free radicals scavenging and metal chelating capacities, indicating their antioxidant power.

scholarly journals Antioxidant poteintial and activity of aerial parts of eight medicinal plants of Uttarakhand, India

2019 ◽  
Vol 48 (2) ◽  
pp. 265-270
Author(s):  
Shakuli Kashyap ◽  
PB Rao ◽  
P Mishra ◽  
Supriya
Keyword(s):  
Radical Scavenging ◽  
Total Phenolic ◽  
Enzymatic Antioxidants ◽  
Antioxidant Power ◽  
Mean Values ◽  
Aerial Parts ◽  
Trolox Equivalent ◽  
Ferric Reducing Antioxidant Power ◽  
Dpph Radical Scavenging ◽  
Gallic Acid Equivalent

The antioxidant potential of aerial parts of eight medicinal plant species were investigated by 1,1- diphenyl-2-picrylhydrazyl (DPPH) radical scavenging, Ferrous ion-chelating (FCA) and ferric reducing antioxidant power assays in five different concentrations and the mean values ranged from 20.39 to 83.01%, 17.21 to 48.62% and 11.70 to 21.65 μg Trolox equivalent/mg extract, respectively. Total phenolic and flavonoid contents ranged from 4.83 to 10.46 μg, gallic acid equivalent/mg extract and 1.12 to 13.11 μg quercitin equivalent/mg extract. Enzymatic antioxidants (Unit/mg fresh weight): superoxide dismutase, catalase and peroxidase values ranged from 14.86 to 49.81, 60.00 to 141.33 and 0.25 to 0.60, respectively. Considering the overall assay M. Pudica can be considered as the potent candidate for displaying antioxidant activity among the experimental plants.

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