scholarly journals Effect of Cocoa Bean Shell Addition on Metabolite Profile and Antioxidant Activity of Herbal Infusions

2021 ◽  
Vol 2021 ◽  
pp. 1-8
Author(s):  
Maria Quijano-Avilés ◽  
Ivan Chóez-Guaranda ◽  
Rafael Viteri ◽  
Ana Barragán-Lucas ◽  
Daynet Sosa ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Antioxidant Activities ◽  
Metabolite Profile ◽  
Gas Chromatography Mass Spectrometry ◽  
Cocoa Bean ◽  
Polyphenol Content ◽  
Total Polyphenol ◽  
Antioxidant Power ◽  
Ferric Reducing Antioxidant Power ◽  
Herbal Infusions

Cocoa bean shell (CBS) is a by-product with aromatic characteristics that can enhance the aroma and bioactivity of herbal infusions. This study was aimed to determine the effect of the addition of cocoa bean shell on the metabolite profile and antioxidant activity of infusions made with Ilex guayusa and Vernonanthura patens and their mixtures. Metabolite profile was analyzed by gas chromatography–mass spectrometry combined with multivariate analysis. Total polyphenol content and flavonoids were determined by the Folin-Ciocalteu method and by the flavonoid-AlCl3 complex, respectively. Antioxidant activities were measured by the decolorization assay of the 2,2-diphenyl-1-picrylhydrazyl radical and the ferric reducing antioxidant power. The results revealed that the addition of CBS increases the content of phenolic acids in the infusions (caffeic acid, 4-hydroxybenzoic acid, and pyrocatechol). Nonetheless, the antioxidant activity of the infusions decreased with the addition of CBS (16.21 to 2.74 TEAC). Carboxylic acids and derivatives, major compounds present in the infusions prepared with V. patens, were the metabolites that showed the highest correlation with the antioxidant activity. This study suggests that the infusions made with CBS present a profile of metabolites different from the infusions of I. guayusa, V. patens, and their mixtures.

scholarly journals Influence of Packaging Material on Polyphenol Content and Antioxidant Activity in Some Commercial Beers

Processes ◽  
2021 ◽  
Vol 9 (4) ◽  
pp. 620
Author(s):  
Mihaela Mirela Bratu ◽  
Semaghiul Birghila ◽  
Antoanela Popescu ◽  
Bogdan-Stefan Negreanu-Pirjol ◽  
Marius Radu ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Radical Scavenging Activity ◽  
Radical Scavenging ◽  
Polyphenol Content ◽  
Total Polyphenol ◽  
Antioxidant Power ◽  
Phenolic Contents ◽  
Significant Difference ◽  
Ferric Reducing Antioxidant Power ◽  
Lager Beer

Using two methods (ferric reducing antioxidant power and radical scavenging activity), the total polyphenol content (Folin–Ciocalteu reagent) and polyphenol patterns (HPLC) in 10 commercial lager beer brands produced in Romania was determined. Samples bottled in glass, plastic and aluminium packages were analysed for each brand when available. Results have indicated considerable variations in the total and individual phenolic contents as well as antioxidant activity across beer brands. Gallic and feulic acids were the dominant phenolic compounds identified samples. The statistical analysis indicates a significant difference between the levels of antioxidant activity detected using DPPH and FRAP, for all three types of material considered. The statistical test ANOVA indicates that the polyphenol concentration is similar across all types of material.

scholarly journals In vitro antioxidant activity of honeydew and multifloral types of honey from Serbia

2013 ◽  
pp. 269-277 ◽  
Author(s):  
Zoran Maksimovic ◽  
Nebojsa Nedic
Keyword(s):  
Antioxidant Activity ◽  
Antioxidant Properties ◽  
Geographic Origin ◽  
Radical Scavenging ◽  
Colour Intensity ◽  
Polyphenol Content ◽  
Total Polyphenol ◽  
Antioxidant Power ◽  
Total Polyphenol Content ◽  
Ferric Reducing Antioxidant Power

Antioxidant properties of fifteen multifloral and honeydew types of honey from Serbia were assessed by determination of ferric-reducing antioxidant power (FRAP assay) and 2,2- diphenyl-1-picrylhydrazyl free radical scavenging ability (DPPH assay), with respect to their total polyphenol content and colour intensity. The results of this study showed that total polyphenol content, antioxidant activity and colour intensity varied widely among different samples, even within the same type of honey. All investigated parameters were strongly dependent on geographic origin of samples, further emphasizing the importance of their detailed chemical characterisation. In general, polyphenolic content in investigated samples of honey, expressed as catechin equivalents, ranged from 480.2 to 1861.1 mg/kg. The ferric-reducing antioxidant power of honey tended to be lower in brighter and higher in darker samples, varying between 489.6 and 3089.8 ?mol Fe(II) per 100 g of honey. The correlation between the colour and antioxidant activity never reached statistical significance in the case of honeydew type of honey, which was opposed to a trend observed in the case of multifloral honey.

scholarly journals Phytochemicals and Antioxidant Activity of Korean Black Soybean (Glycine max L.) Landraces

Antioxidants ◽  
2020 ◽  
Vol 9 (3) ◽  
pp. 213 ◽  
Author(s):  
Kyung Jun Lee ◽  
Da-Young Baek ◽  
Gi-An Lee ◽  
Gyu-Taek Cho ◽  
Yoon-Sup So ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Glycine Max ◽  
Antioxidant Activities ◽  
Principal Component ◽  
Total Polyphenol ◽  
Antioxidant Power ◽  
Black Soybean ◽  
Ferric Reducing Antioxidant Power ◽  
Glycine Max L ◽  
Natural Phenolic Compounds

Black soybean (Glycine max L.) has been used as a traditional medicine because its seed coat contains various natural phenolic compounds such as anthocyanins. The objective of this study was to reveal the genetic variation in the agricultural traits, phytochemicals, and antioxidant activity of 172 Korean black soybean landraces (KBSLs) and establish a relationship among them. The evaluation of three agricultural traits (days to 50% flowering, maturity, and 100-seed weight), six phytochemicals (delphinidin-3-glucoside, cyaniding-3-glucoside, petunidin-3-glucoside, daidzin, glycitin, and genestin), and four antioxidant activities (2,2-diphenyl-1-picrylhydrazyl (DPPH), 2,2′-azino-bis-(3-ethylbenzothiazoline-6-sulfonic acid)(ABTS), ferric-reducing antioxidant power (FRAP), and the total polyphenol content (TPC) of 172 KBSLs were analyzed in 2012 and 2015. The agricultural traits, phytochemicals, and antioxidant activities of the 172 KBSLs showed wide variation among the accessions and years. In correlation analysis, the agricultural traits and phytochemicals showed positive and negative correlations with phytochemicals and antioxidant activity, respectively. The principal component analyses result indicated that phytochemicals accounted for most of the variability in the KBSLs. In clustering analysis, the 172 KBSLs were classified into four clusters. These results could lead to expanding the knowledge of the agricultural traits, phytochemicals, and antioxidant activity of the KBSLs, which are valuable materials for the development of new soybean varieties.

scholarly journals FRACTIONATION OF THE N-HEXANE EXTRACT OF GARCINIA BANCANA MIQ. (MANGGIS HUTAN) LEAVES AND ITS ANTIOXIDANT ACTIVITY BASED ON 1,1-DIPHENYL-2- PICRYLHYDRAZYL AND FERRIC REDUCING ANTIOXIDANT POWER ASSAYS

2018 ◽  
Vol 10 (1) ◽  
pp. 407
Author(s):  
Dewi Kumala Putri ◽  
Berna Elya ◽  
Nuraini Puspitasari
Keyword(s):  
Antioxidant Activity ◽  
Antioxidant Activities ◽  
Hexane Extract ◽  
Phytochemical Screening ◽  
Active Fraction ◽  
Leaf Extracts ◽  
Antioxidant Power ◽  
Dpph Method ◽  
Ferric Reducing Antioxidant Power

Objective: To assess the antioxidant activity from another part of the plant, in this study, leaf extracts in n-hexane were fractionated.Methods: Ten fractions were obtained and tested in vitro for antioxidant activity using two methods, 1,1-diphenyl-2-picrylhydrazyl (DPPH) and ferricreducing antioxidant power (FRAP), to identify the most active fraction.Results: The IC50 of the most active fraction was 36.24 μg/mL using the DPPH method, and the EC50 was 39.54 μg/mL using the FRAP method. Themost active fraction was also shown to contain terpenoids.Conclusion: The most active fraction of an n-hexane extract of the leaves of Gacinia bancana Miq., which was tested by both DPPH and FRAP methodshad antioxidant activities with IC50 and EC50 values of 36.2482 μg/mL and 39.5442 μg/mL, respectively. Phytochemical screening showed that activefraction contains terpenoids.

scholarly journals Antioxidant Activities and Volatile Flavor Components of Selected Single-Origin and Blend Chocolates

Molecules ◽  
2020 ◽  
Vol 25 (16) ◽  
pp. 3648
Author(s):  
Lucia Godočiková ◽  
Eva Ivanišová ◽  
Grzegorz Zaguła ◽  
Luis Noguera-Artiaga ◽  
Ángel A. Carbonell-Barrachina ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Phenolic Acids ◽  
Antioxidant Activities ◽  
Antioxidant Properties ◽  
Total Content ◽  
Composition Analysis ◽  
High Positive Correlation ◽  
Antioxidant Power ◽  
Single Origin ◽  
Ferric Reducing Antioxidant Power

The biological activity of chocolates gains more and more attention of consumers. Its antioxidant properties depend, among other factors, mainly on the origin of cocoa and the characteristics that this origin gives to the final product. Therefore, the aim of the study was to measure and compare the total content of polyphenols, antioxidant activity, and key odorants of commercial chocolates made from blend cocoa with single-origin ones. The highest content of polyphenols was found in 90% blend cocoa chocolate and single-origin samples, while the lowest content was exhibited by 100% chocolate from blend cocoa mass. The highest antioxidant activity measured by 2,2′-Azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) diammonium salt (ABTS) and ferric reducing antioxidant power (FRAP) assays was observed in the sample of chocolate with 90% cocoa solids from blend mass, followed by single-origin chocolates. A high positive correlation between ABTS assay and the total polyphenol and phenolic acids’ content, as well as among the total content of polyphenols, flavonoids, and phenolic acids was found. Mineral composition analysis showed that dark chocolate is a valuable source of some elements, especially Mg, Fe, and Zn. Potentially toxic elements were not detected or below permitted limits. Moreover, it was noticed that the main volatile compound in all tested samples was acetic acid, but pyrazines were considered the most important group of chocolate odorants.

scholarly journals Antibacterial and Antioxidant Activities of Derriobtusone A Isolated fromLonchocarpus obtusus

2014 ◽  
Vol 2014 ◽  
pp. 1-9 ◽  
Author(s):  
Mayron Alves Vasconcelos ◽  
Francisco Vassiliepe Sousa Arruda ◽  
Daniel Barroso de Alencar ◽  
Silvana Saker-Sampaio ◽  
Maria Rose Jane Ribeiro Albuquerque ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Pathogenic Bacteria ◽  
Antioxidant Activities ◽  
Radical Scavenging ◽  
Test Results ◽  
Dpph Radical ◽  
Antioxidant Power ◽  
E Coli ◽  
Planktonic Growth ◽  
Ferric Reducing Antioxidant Power

This study evaluated the effect of derriobtusone A, a flavonoid isolated fromLonchocarpus obtusus, on two important pathogenic bacteria,Staphylococcus aureusandEscherichia coli, as well as its antioxidant activity and toxicity. Planktonic growth assays were performed, and the inhibition of biofilm formation was evaluated. In addition, antioxidant activity was assessed by DPPH radical scavenging assay, ferrous ion chelating assay, ferric-reducing antioxidant power assay, andβ-carotene bleaching assay. Toxicity was evaluated by the brine shrimp lethality test. Results showed that derriobtusone A completely inhibited the planktonic growth ofS. aureusat 250 and 500 μg/mL; however, it did not have the same activity onE. coli. Derriobtusone A reduced the biomass and colony-forming unit (cfu) ofS. aureusbiofilm at concentrations of 250 and 500 μg/mL. In various concentrations, it reduced the biofilm biomass ofE. coli, and, in all concentrations, it weakly reduced the cfu. Derriobtusone A showed highly efficient antioxidant ability in scavenging DPPH radical and inhibitingβ-carotene oxidation. The compound showed no lethality toArtemiasp. nauplii. In conclusion, derriobtusone A may be an effective molecule againstS. aureusand its biofilm, as well as a potential antioxidant compound with no toxicity.

scholarly journals Cones of coniferous taxa as a potential source of bioactive polyphenols

2021 ◽  
Vol 18 ◽  
Author(s):  
Tamás Hofmann ◽  
Levente Albert ◽  
Balázs Bocz ◽  
Dániel Bocz ◽  
Eszter Visi-Rajczi
Keyword(s):  
High Performance ◽  
High Performance Liquid Chromatographic ◽  
Polyphenol Content ◽  
Total Polyphenol ◽  
Antioxidant Power ◽  
Ferric Reducing Antioxidant Power ◽  
Chamaecyparis Lawsoniana ◽  
Tandem Mass Spectrometric ◽  
Thuja Orientalis ◽  
Liquid Chromatographic

Background: Coniferous cones are a by-product of forestry and wood logging, used for many possible purposes, e.g., the extraction of polyphenols. Objective: The aim of the present article was the comparison of the antioxidant polyphenol content of the differently matured cones of 17 selected conifers, either common in Hungary or yet uninvestigated. Methods: Total polyphenol content, ferric reducing antioxidant power and 2,2-diphenyl-1-picrylhydrazyl assays were used to determine the antioxidant contents. A scoring system was implemented using the three assay results to evaluate and compare the overall antioxidant power of the samples. Result and Conclusion: Highest antioxidant contents were found in green cones, followed by mature and opened cones. Taxa with the highest scores were Tsuga canadensis, Cryptomeria japonica, Chamaecyparis lawsoniana, Thuja orientalis, Metasequoia glyptostroboides and Picea abies. For the samples with the highest overall antioxidant power the high-performance liquid chromatographic/tandem mass spectrometric polyphenol profiling was carried out (green cones of T. canadensis and P. abies) and 83 compounds have been tentatively identified and described. Results contribute to the future bioactivity testing and evaluation of the cone extracts of T. canadensis and P. abies.

scholarly journals PENGARUH WAKTU FERMENTASI TERHADAP AKTIVITAS ANTIOKSIDAN DAN KADAR BETASIANIN MINUMAN FUNGSIONAL DARI BUAH NAGA (Hylocereus polyrhizus) DAN UMBI BIT (Beta vulgaris)

2020 ◽  
Vol 7 (1) ◽  
Author(s):  
Yati Maryati ◽  
Agustine Susilowati ◽  
Nina Artanti ◽  
Puspa Dewi Narij Lotulung ◽  
Aspiyanto Aspiyanto
Keyword(s):  
Antioxidant Activity ◽  
Free Radical ◽  
Antioxidant Activities ◽  
Iron Ions ◽  
Antioxidant Power ◽  
Fermentation Time ◽  
Reduction Of Iron ◽  
Dragon Fruit ◽  
Functional Beverages ◽  
Ferric Reducing Antioxidant Power

Effect of Fermentation on Antioxidant Activities and Betacyanin Content of Functional Beverages from Dragon Fruit and BeetrootKombucha is a traditional beverage prepared by fermenting polyphenol-rich tea using a consortium of bacteria and yeast (SCOBY). Dragon fruit and beetroot contain a significantly high amount of polyphenols and betacyanin as antioxidants which are beneficial in reducing the risk of cardiovascular disease, cancer, and the body's natural degeneration related to the early-aging process. This study aims to determine changes in antioxidant activity and levels of betacyanin from fermented dragon fruit and beetroot as functional drinks during different fermentation times. The results showed that there was a correlation between fermentation time and antioxidant activity in its ability to counteract free radicals, ferric reducing antioxidant power (FRAP), and the levels of betacyanin produced. Longer fermentation time caused an increase in free radical inhibition and reduction of iron ions but reduced the levels of betacyanin. The optimum value of free radical inhibitory activity (DPPH) was obtained in the 12-day fermented dragon fruit drink with an inhibitory value of 80.76%, ability to reduce iron ions by 197.94 µg ascorbic acid mL-1, and betacyanin level of 0.055 mg L-1Keywords: antioxidants, dragon fruit, betacyanin, beetroot, functional beverages ABSTRAKKombucha merupakan minuman tradisional hasil olahan fermentasi teh yang kaya polifenol dengan konsorsium bakteri dan yeast (SCOBY). Buah naga dan umbi bit memiliki polifenol dan senyawa betasianin yang cukup tinggi sebagai antioksidan yang bermanfaat dalam menurunkan risiko penyakit kardiovaskular, penyakit kanker dan degenerasi alami tubuh terkait proses penuaan dini. Penelitian ini bertujuan untuk mengetahui perubahan aktivitas antioksidan dan kadar betasianin dari fermentasi buah naga maupun umbi bit sebagai minuman fungsional selama waktu fermentasi yang berbeda. Hasil penelitian menunjukkan bahwa adanya korelasi antara waktu fermentasi terhadap aktivitas antioksidan dalam kemampuannya menangkal radikal bebas, kemampuan mereduksi ion besi (FRAP), dan kadar betasianin yang dihasilkan. Semakin lama waktu fermentasi menyebabkan peningkatan penghambatan radikal bebas dan reduksi ion besi, namun menurunkan kadar betasianin. Nilai aktivitas penghambatan radikal bebas (DPPH) optimum diperoleh dari minuman fermentasi buah naga selama waktu fermentasi 12 hari dengan nilai penghambatan sebesar 80,76%, kemampuannya dalam mereduksi ion besi sebesar 197,94 µg asam askorbat mL–1, dan kadar betasianin sebesar 0,055 mg L–1

scholarly journals Antioxidant activity and polyphenol composition of Pistacia terebinthus fruit from Tessala (Western Algeria)

2021 ◽  
Vol 5 (11) ◽  
pp. 30-34
Author(s):  
Nazim Bellifa ◽  
Abdelhak Ismail Benhaddou ◽  
Houssem Eddine Ferkous ◽  
Mohammed Adil Selka ◽  
Houari Toumi ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Antioxidant Activities ◽  
Radical Scavenging Activity ◽  
Radical Scavenging ◽  
Total Phenolic ◽  
Antioxidant Power ◽  
Scavenging Effect ◽  
Coffee Substitute ◽  
Ferric Reducing Antioxidant Power ◽  
Pistacia Terebinthus

Background: Consumption of traditional herbal beverages has been generally increased in the last decades, Terebinth coffee, known as ‘‘menengic coffee’’ in Turkish, is one of the most consumed herbal coffees in Turkey, turpentine tree is one of the components of the Mediterranean bush, particularly in Algeria, known as Betoum el Kiffan is largely used as food and in traditional medicine. Aims: In this study, Total phenol, flavonoid content, and antioxidant activity of three extracts of Pistacia trebinthus fruit growing in Algeria was measured using radical scavenging activity tests and metal-related tests including, ferric-reducing antioxidant power (FRAP). The chemical composition profile of the fruits and the coffee brands was identified by thin-layer chromatography, the effects of roasting method of this fruit was rivaled also. Materials and Methods: The total phenolic content of the extracts was determined using the Folin-Ciocalteu method. All extracts of the terebinth fruits and coffee brands displayed a high DPPH scavenging effect. Results: The results of the ferric-reducing antioxidant power show that the reduction capacity is proportional to the increase in the concentration of the samples. All the extracts of the plant exhibit antioxidant activities lower than those of the reference product besides the infusion extract of the P. terebinthus roasted coffee, which is the most active with an optical density of 1.68 nm at a concentration of 400 μg/mL. The chromatography results show that the various extracts of Pistacia terebinthus fruit carry a large number of polyphenols, in particular the carboxylic acids phenols. Conclusions: The plant can be considered as a coffee substitute and opens up promising avenues for the food and pharmaceutical industry in Algeria. Keywords: Antioxidant, Pistacia terebinthus, Coffee, FRAP, polyphenol.

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.

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