Polyphenol components and antioxidant activity of Thymus spp.

This scientific work was aimed to evaluate the antioxidant potential of aromatic plants of Thymus spp. in the East of Ukraine. These plants are known as medicinal and food around the world. All antioxidant parameters were investigated spectrophotometrically: total content of polyphenols (TPC), the total content of phenolic acids (TPAC), the total content of flavonoids (TFC), molybdenum reducing power of extracts (MRP), and antioxidant activity by DPPH method (DPPH). Investigation of ethanolic extracts demonstrated that TPC varied from 57.89 to 123.67 mg/g gallic acid equivalent (GAE) DW for Th. pulegioides, from 61.43 to 168.18 mg GAE/g for Th. serpyllum, and from 47.36 to 115.67 mg GAE/g for Th. vulgaris. TPAC ranged from 27.36 to 50.22 mg/g caffeic acid equivalent (CAE) DW for Th. pulegioides, from 28.58 to 59.62 mg CAE/g for Th. serpyllum, and from 22.95 to 53.82 mg CAE/g for Th. vulgaris. TFC was determined in a range from 29.88 to 61.23 mg/g quercetin equivalent (QE) DW for Th. pulegioides, from 36.0 to 82.43 mg QE/g for Th. serpyllum, and from 24.59 to 55.41 mg QE/g for Th. vulgaris. MRP was detected in the range of 94.65 – 204.76 mg/g Trolox equivalent (TE) DW for Th. pulegioides, 96.06 – 219.0 mg TE/g for Th. serpyllum, and 87.56 – 215.43 mg TE/g for Th. vulgaris. The antioxidant activity of extracts by the DPPH method was 6.34 – 9.23 mg TE/g for Th. pulegioides, 8.11 – 9.21 mg TE/g for Th. serpyllum, and 4.97 – 9.53 mg TE/g for Th. vulgaris. It was established that polyphenol accumulation depended on the growth stage and species. For all species was found a strong correlation between TPC and TFC (r = 0.938, 0.908, and 0.854). Investigated Thymus spp. are a valuable source of antioxidants that can be used in pharmacological studies and the food industry.

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Parameters of antioxidant activity of Galega officinalis L. and Galega orientalis Lam. (Fabaceae Lindl.) plant raw material

Potravinarstvo Slovak Journal of Food Sciences ◽

10.5219/1271 ◽

2020 ◽

Vol 14 ◽

pp. 125-134

Author(s):

Olena Vergun ◽

Oksana Shymanska ◽

Dzhamal Rakhmetov ◽

Olga Grygorieva ◽

Eva Ivanišová ◽

...

Keyword(s):

Antioxidant Activity ◽

Phenolic Acids ◽

Pharmacological Study ◽

Reducing Power ◽

Total Content ◽

Raw Material ◽

Galega Officinalis ◽

Dpph Method ◽

Galega Orientalis ◽

Plant Raw Material

The plant raw material of Galega officinalis L. (goat’s rue) and Galega orientalis Lam. (fodder galega) investigated in this study. These species are known as fodder crops with high productivity of green mass and as medicine plants. The current study was aimed to evaluate an accumulation in dry raw of selected plants the total content of phenolic acids (TPA) and flavonoids (TFC) as compounds with antioxidant activity (AA) by spectrophotometric method. AA by DPPH-method and phosphomolybdenum method (reducing power (RP)) was measured. Study of ethanolic extracts of G. officinalis showed accumulation of TPA in different organs in range from 3.65 to 15.17 mg.g-1 caffeic acid equivalent (CAE) and TFC from 10.08 to 65.75 mg.g-1 quercetin equivalent (QE), AA by DPPH-method from 6.02 to 8.45 mg.g-1 Trolox equivalent (TE) and RP of extracts by phosphomolybdenum method from 86.56 to 288.15 mg TE.g-1. In extracts of G. orientalis was identified TPA from 3.52 to 18.52 mg CAE.g-1 and TFC from 6.09 to 46.72 mg QE.g-1, antioxidant activity by DPPH-method from 6.80 to 8.48 mg TE.g-1 and antioxidant capacity by phosphomolybdenum method from 52.52 to 188.51 mg TE.g-1. It was established that less concentration of studied compounds found in the stems for both species. It should be noted that the content of phenolic acids in the leaves was decreased and flavonoids in stems increased during vegetation for both species. Content of phenolic acids in the generative organs and flavonoids in the leaves decreased in raw of G. orientalis during vegetation. Pearson’s correlation analysis demonstrated very strong relations between TFC and AA by DPPH, TPA and RP, TFC and RP for G. officinalis extracts. Very strong correlation in the extracts of G. orientalis found between TFC and RP, TPA and RP. Obtained results can be used in the further biochemical and pharmacological study.

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THE STRUCTURE OF THE VARIABILITY OF SOME AROMATIC PLANTS ON THE CONTENT OF TOTAL ANTIOXIDANTS IN THE ECOLOGICALGEOGRAPHICAL EXPERIMENT

VEGETABLE CROPS OF RUSSIA ◽

10.18619/2072-9146-2019-3-87-90 ◽

2019 ◽

pp. 87-90

Author(s):

F. I. Islamova ◽

A. M. Musaev ◽

G. K. Radzhabov

Keyword(s):

Antioxidant Activity ◽

Sea Level ◽

Total Content ◽

Environment Interaction ◽

Aromatic Plants ◽

Natural Habitats ◽

High Accumulation ◽

Scientific Center ◽

Plant Materials ◽

Amperometric Method

The work presents the results of the study of the antioxidant activity of fruits (clapper seeds) of aromatic plants, (Apiaceae, Lindl.): dill (Anethum graveolens L.) and coriander (Coriandrum sativum L.). The plant materials for determining the total content of antioxidants were collected during an ecological-geographical experiment at the Gunib and Tsudakhar experimental bases of the Mountain Botanical Garden of the Dagestan Scientific Center, Russian Academy of Sciences, at altitudes of 1100 and 1730 meters above sea level, simulating the conditions of mountain-valley and upper mountain climate zones, respectively. Determination of the total content of antioxidants in aqueous solutions was performed by the amperometric method on “Tsvet Yauza 01 -AA” instrument. Studies have shown the variability of accumulation of antioxidants, depending on the type, variety, height above sea level of the place of growth of the sample. In terms of the total content of antioxidants, the effect of the cultivation area substantially exceeded the inter-variety differences. In the studied species, intervarietal differences appeared more clearly in A. graveolens, which correlated with the latitude of the range and the ecological amplitude of growth of these species in natural habitats. The obtained data on the study of antioxidant activity in some aromatic medicinal plants allow to evaluate their biological value, to recommend more distinguished samples for cultivation. Plant materials with a high accumulation of antioxidants that can neutralize the harmful effects of oxidative stress can be used as a source of natural polyphenols, natural antioxidants in food. This methodical approach, demonstrated in the work, can serve as a methodological basis for studying the “genotype x environment” interaction and express assessment of varieties, clones, populations, and other units of accounting for the stability and sustainability of the parameters studied, including the content of antioxidants.

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STUDY OF THE CONTENT OF ANTIOXIDANTS AND THEIR ACTIVITY IN CONCENTRATED EXTRACTS OF CRANBERRY (VACCINIUM OXYCOCCUS), SEA BUCKTHORN (HIPPOPHAE RHAMNOIDES L.), BLACKBERRY (RUBUS FRUTICOSUS), VIBURNUM (VIBURNUM OPULUS L) AND MOUNTAIN ASH (SORBUS AUCUPARIA L.

chemistry of plant raw material ◽

10.14258/jcprm.2021049365 ◽

2021 ◽

pp. 157-164

Author(s):

Natal'ya Borisovna Eremeeva ◽

Nadezhda Viktorovna Makarova

Keyword(s):

Antioxidant Activity ◽

Phenolic Compounds ◽

Total Content ◽

Sea Buckthorn ◽

Biologically Active ◽

Sorbus Aucuparia ◽

Viburnum Opulus ◽

Rubus Fruticosus ◽

Dpph Method ◽

Mountain Ash

Extracts and their concentrates can be considered as a source of biologically active ingredients of food products and as food additives to increase the consumption of useful substances of berries. The benefits gained from their use lead to the development of advanced technologies that can allow them to be extracted from the feedstock without significantly compromising the biological activity from the feedstock. In this paper, we studied the content of antioxidants and their activity in concentrated extracts of cranberry (Vaccinium Oxycoccus), sea buckthorn (Hippophae rhamnoides L.), blackberry (Rubus fruticosus), viburnum (Viburnum opulus L.) and mountain ash (Sorbus aucuparia L.) berries. For all extracts, the total content of phenolic compounds, flavonoids and anthocyanins, antioxidant activity according to the DPPH method and iron-reducing antioxidant activity (FRAP) were determined. Concentrated extracts of viburnum contain the largest amount of phenolic compounds (9.3±0.3 mol HA/l), flavonoids (1.96±0.08 mol K/l) and anthocyanins (0.26±0.02 mol CG/l) among the studied extracts. There is also a high total content of phenolic substances and flavonoids in blackberry and rowan extracts (5.7 mol HA/l, 1.33 mol K/l and 4.7 mol HA/l, 192 mol K / l, respectively). The antioxidant activity of the extract of viburnum berries showed a directly proportional dependence on the content of biologically active compounds in it: DPPH-method-2.4 mg / ml; FRAP-method-39.99 mmol Fe2+ / kg. Also, high levels were found in concentrated extracts of blackberries, sea buckthorn and mountain ash. It is the extracts of viburnum, blackberry and mountain ash that are recommended to be used in the production of food products to enrich them with biologically active substances and give them antioxidant properties. Cranberry and sea buckthorn extracts can be used in combination with other extracts.

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Comparative study of some physicochemical and biological properties of effect host species variation on the relationship Saharan parasitic plant Cistanche violaceae (Desf.) Beck.

Notulae Scientia Biologicae ◽

10.15835/nsb13411054 ◽

2021 ◽

Vol 13 (4) ◽

pp. 11054

Author(s):

Fatma ALIA ◽

Atef CHOUIKH ◽

Ali Boutlelis DJAHRA ◽

Aida BOUSBIA BRAHIM ◽

Sadok NANI ◽

...

Keyword(s):

Antioxidant Activity ◽

Host Species ◽

Reducing Power ◽

Total Content ◽

Parasitic Plants ◽

Parasitic Plant ◽

Biological Properties ◽

Species Variation ◽

Two Samples ◽

Physicochemical And Biological Properties

This work aims to study the effect of different host species on physicochemical and biological properties of the Saharan parasitic plant Cistanche violacea that grows parasitized on two hosts Haloxylon articulatum and a Limonistrum guyonianum in the eastern desert of Algeria. The physicochemical characteristics of C. violcea showed an affinity for the results of both ash and pH and it showed a difference in the amount content of carbohydrates and the value of electrical conductivity. For the content of polyphenols, flavonoids, anthocyanins and tannins the highest values were recorded in C. violcea, which was parasitized on H. articulatum. While, the results of HPLC have identified nine compounds in the crude extracts of the parasitic plants and their hosts in different concentrations. In antioxidant activity, the tannin and anthocyanin extracts from C. violcea parasitized on H. articulatum showed better inhibition of DPPH• radical and best the total antioxidant capacity respectively, but the tannins extract of C. violcea parasitized on L. guyonianum given best reducing power capacity. In SPF assay by UV-Vis spectrophotometry method, all extracts of the parasitic plants showed mild to moderate sun protection. Statically the host variation did not show any significant differences in the physicochemical analysis and the quantitative and qualitative total content of polyphenols. While the significant differences appeared through the antioxidant activity tests, especially between C. violcea and its host H. articulatum, between C. violacea and its host H. articulatum and between the two samples of parasitic plants.

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Quantification of the Antioxidant Activity of Plant Extracts: Analysis of Sensitivity and Hierarchization Based on the Method Used

Antioxidants ◽

10.3390/antiox9010076 ◽

2020 ◽

Vol 9 (1) ◽

pp. 76 ◽

Cited By ~ 3

Author(s):

Natividad Chaves ◽

Antonio Santiago ◽

Juan Carlos Alías

Keyword(s):

Antioxidant Activity ◽

Antioxidant Capacity ◽

Plant Species ◽

Radical Scavenging ◽

Reducing Power ◽

Trolox Equivalent Antioxidant Capacity ◽

Antioxidant Compounds ◽

Frap Assay ◽

Trolox Equivalent

Plants have a large number of bioactive compounds with high antioxidant activity. Studies for the determination of the antioxidant activity of different plant species could contribute to revealing the value of these species as a source of new antioxidant compounds. There is a large variety of in vitro methods to quantify antioxidant activity, and it is important to select the proper method to determine which species have the highest antioxidant activity. The aim of this work was to verify whether different methods show the same sensitivity and/or capacity to discriminate the antioxidant activity of the extract of different plant species. To that end, we selected 12 species with different content of phenolic compounds. Their extracts were analyzed using the following methods: 2,2-di-phenyl-1-picrylhydrazyl (DPPH) radical scavenging capacity assay, ferric reducing (FRAP) assay, Trolox equivalent antioxidant capacity (ABTS) assay, and reducing power (RP) assay. The four methods selected could quantify the antioxidant capacity of the 12 study species, although there were differences between them. The antioxidant activity values quantified through DPPH and RP were higher than the ones obtained by ABTS and FRAP, and these values varied among species. Thus, the hierarchization or categorization of these species was different depending on the method used. Another difference established between these methods was the sensitivity obtained with each of them. A cluster revealed that RP established the largest number of groups at the shortest distance from the root. Therefore, as it showed the best discrimination of differences and/or similarities between species, RP is considered in this study as the one with the highest sensitivity among the four studied methods. On the other hand, ABTS showed the lowest sensitivity. These results show the importance of selecting the proper antioxidant activity quantification method for establishing a ranking of species based on this parameter.

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Determination of the nutritional and functional metabolites of Nanochloropsis gaditana produced in Algeria and evaluation of its antioxidant activity

South Asian Journal of Experimental Biology ◽

10.38150/sajeb.7(1).p13-20 ◽

2017 ◽

Vol 7 (1) ◽

pp. 13-20

Author(s):

Asmaa Kherraf ◽

Wafaa Tehami ◽

Wahiba Boufeldja ◽

ImÃ¨ne Yahla ◽

Ghislaine Amira Dra ◽

...

Keyword(s):

Antioxidant Activity ◽

Tannic Acid ◽

Reducing Power ◽

Matter Content ◽

Bioactive Substances ◽

Fresh Matter ◽

Nannochloropsis Gaditana ◽

Methanolic Extracts ◽

Gallic Acid Equivalent

The aim of this work was to valorize the microalgae Nannochloropsis gaditana grown in Algeria for the purpose of producing human and animal food supplements as well as bioactive substances. The microalga had a fresh matter content of 9.33±1.15%. The amount of ash (6.4 ± 0.23%) was high and reflected mineral richness. Total sugars represented 7.13±0.23%. Proteins and lipids represented 13.38±0.2% and 7±1%, respectively. The ethanolic (EENg) and methanolic (MENg) extracts obtained from 10 g of lyophilisates of N. gaditana represented respectively 24±1.65% and 14.2±0.7%. The evalu-ation of the polyphenols in these extracts showed interesting rates repre-senting 41.53±0.41 mg gallic acid equivalent (GAE)/g of EENg dry extract and 38.72±0.33 mg GAE/g for the MENg. The flavonoid contents were 19.82±1.65 and 18.61±1.45 mg quercetin equivalent (QE)/g respectively for the ethanol-ic and methanolic extracts of this microalgae. The condensed and hydrolyza-ble tannins represented respectively 0.35±0.04 and 0.63±0.09 mg of tannic acid/g of dry EENg. They also represented respectively 0.50±0.08 and 0.18±0.02 mg of tannic acid/g of dry MENg. The antioxidant activity generat-ed by the extracts EENg and MENg against 2,2-diphenyl-1-picrylhydrazil (DPPH ) and by the reducing power of iron (FRAP) seems appreciable com-pared to that of ascorbic acid. These results are in favor of the development of the microalgae sector constituting a futuristic vision to allow the development of the sector with a view to sustainability.

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Evaluation of the antioxidant activity of the leaves of acerola, guabiroba and ora-pro-nobis

Revista Brasileira de Pesquisa em Alimentos ◽

10.14685/rebrapa.v1i2.29 ◽

2010 ◽

Vol 1 (2) ◽

pp. 129

Author(s):

Denise Alves Vieira ◽

Pauline Sambugaro Santos ◽

Charles Windson Isidoro Haminiuk ◽

Manuel Salvador Vicente Plata-Oviedo

Keyword(s):

Antioxidant Activity ◽

Phenolic Compounds ◽

Total Content ◽

Natural Antioxidants ◽

Superior Performance ◽

Good Ability ◽

Ethanolic Extracts ◽

Radical Method ◽

Gallic Acid Equivalent ◽

Potential Use

The objective of this work was to quantify the total content of phenolic compounds and the antioxidant activity of ethanolic extracts of acerola, guabiroba and ora-pro-nobis leaves. The analysis was performed by the DPPH free-radical method, aiming to find plants with potential use as natural antioxidants in foodstuff. In the extraction of phenolic compounds from leaves, acidified methanol 80% showed superior performance when compared to ethanol 80%. It was found the amounts of 1656.66, 5196.66 and 1693.33 mg GAE (gallic acid equivalent)/100 g for acerola, guabiroba and ora-pro-nobis leaves, respectively. Ethanolic extracts of guabiroba and ora-pro-nobis leaves (8.57 µg GAE/mL) presented higher antioxidant activity (92.6 and 92.76%, respectively) than BHT (10.13%), ascorbic acid (19.25%) and similar to trolox (92.79%). The extract of ora-pro-nobis presented the lowest IC50 (3.22 μg GAE/mL) showing a good ability to capture the DPPH radical. DOI: http://dx.doi.org/10.14685/rebrapa.v1i2.29

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Comparative analysis of antioxidant activity and phenolic compounds in the fruits of Aronia spp.

Potravinarstvo Slovak Journal of Food Sciences ◽

10.5219/1360 ◽

2020 ◽

Vol 14 ◽

pp. 393-401

Author(s):

Yulia Vinogradova ◽

Olena Vergun ◽

Olga Grygorieva ◽

Eva Ivanišová ◽

Ján Brindza

Keyword(s):

Antioxidant Activity ◽

Phenolic Compounds ◽

Phenolic Acids ◽

Antioxidant Activities ◽

Biological Activities ◽

Reducing Power ◽

Biologically Active ◽

Polyphenol Compounds ◽

Dpph Method ◽

Ethanol Extracts

Chokeberry (Aronia Medik.) is a non-traditional fruit plant known as a rich source of biologically active compounds and inhibits the numerous biological activities. We compared the antioxidant activity and phenolic compounds of fruits between widely cultivated Aronia mitschurinii (AM-TCH, from Tchekhov district; AM-D, from Dmitrov district; AM-OZ, from Orekhovo-Zuevsky district of Moscow region, Russia) and introduced North American Aronia species (Aronia arbutifolia (AA-M), A. melanocarpa (AML-M), A. × prunifolia (AP-M), which have not been planted yet in the arboretum of Main Botanical Garden of the Russian Academy of Sciences (Moscow). Studying samples were collected in their secondary distribution range. Ethanolic extracts were determined for antioxidant capacity (antioxidant activity by DPPH and phosphomolybdenum methods, the total content of polyphenols, flavonoids, phenolic acids) and measured spectrophotometrically. As standards were used Trolox (TE) for antioxidant activities, gallic acid (GAE) for polyphenol content, quercetin (QE) for flavonoid content, caffeic acid (CAE) for phenolic acid content. The antioxidant activity by DPPH method in ethanol extracts of investigated plants was from 6.96 (AM-D) to 8.89 (AM-OZ) mg TE.g-1 DW. Reducing the power of investigated extracts exhibited activity from 151.47 (AM-OZ) to 297.8 (AA-M) mg TE.g-1 DW. The content of polyphenol compounds determined from 25.98 (AM-TCH) to 54.39 (AA-M) mg GAE.g-1 DW, phenolic acids content was from 7.76 (AP-M) to 11.87 (AM-D) mg CAE.g-1 DW and the content of flavonoids detected from 8.12 (AM-OZ) to 16.62 (AM-D) mg QE.-1 DW. Obtained data showed a strong correlation between the content of polyphenol compounds and reducing the power of extracts (r = 0.700), between flavonoids and phenolic acids (r = 0.771) and also between phenolic acids and reducing power (r = 0.753) in Aronia ethanol extracts. Fruits of investigated species of Aronia can be propagated as a source of polyphenol compounds with antioxidant activity and obtained results may use for farther pharmacological study.

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PHYTOCHEMICAL STUDY AND IN VITRO ANTIOXIDANT ACTIVITIES OF HAMMADA SCOPARIA EXTRACTS FROM SOUTHEASTERN ALGERIA

Asian Journal of Pharmaceutical and Clinical Research ◽

10.22159/ajpcr.2018.v11i10.27067 ◽

2018 ◽

Vol 11 (10) ◽

pp. 187

Author(s):

Benkherara Salah ◽

Bordjiba O

Keyword(s):

Antioxidant Activity ◽

Secondary Metabolites ◽

Condensed Tannins ◽

Aerial Part ◽

Reducing Power ◽

Total Flavonoids ◽

Total Phenols ◽

Phytochemical Screening ◽

Trolox Equivalent

Objective: This study was carried out to determine the phytochemical constituents and to evaluate the antioxidant potential of the aerial part extracts of Hammada scoparia (Pomel) Iljin to validate the medicinal potential of this Algerian plant species.Methods: Crude extracts were prepared by cold maceration with absolute methanol and distilled water. Preliminary phytochemical screening is carried out to detect the presence of the major secondary metabolites using qualitative characterization methods. Quantitative estimation of total phenols, total flavonoids, flavanols, flavonols, and condensed tannins contents is performed using gallic acid, rutin, catechin, and quercetin as standards. In vitro antioxidant activity was evaluated by the free radical scavenging activity by 2,2-diphenyl-1-picrylhydrazyl (DPPH), trolox equivalent antioxidant capacity by scavenging of 2,2′-azinobis-(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS) radical cation assay, and the ferric reducing power assay (ferric reducing antioxidant power).Results: Phytochemical screening showed the presence of alkaloids, flavonoids, tannins, terpenes and sterols, saponins, and anthocyanins. Total phenols were present more in aqueous crude extract (ACE) with 336.756±0.855 mg gallic acid equivalent/g DM. Total flavonoids and flavonols were more abundant in methanolic crude extract (MCE) than ACE. However, condensed tannins and flavanols were present less in MCE with only 0.958±0.052 and 4.547±0.055 mg CE/g DM, respectively. The ACE of this plant species had greater antioxidant activity than the other extract by DPPH and ABTS assays (35.823±0.129 and 51.323±0.394 mg trolox equivalent/g DM). The better ferric reducing power (2060.535±2.566 mM Fe+2/g DM) was also recorded with the same extract.Conclusion: ACE of aerial part of H. scoparia (Pomel) Iljin showed a high amount of secondary metabolites. The obtained results confirmed that the extracting solvent influenced the antioxidant property estimations of this plant. Hence, the ACE can be further exploited further for in vitro and in vivo research work.

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DETERMINATION OF BIOLOGICAL ACTIVITIES OF THREE MARINE ALGAE COLLECTED FROM VISAKHAPATNAM COAST

Asian Journal of Pharmaceutical and Clinical Research ◽

10.22159/ajpcr.2017.v10i12.20857 ◽

2017 ◽

Vol 10 (12) ◽

pp. 274 ◽

Cited By ~ 2

Author(s):

Satya Lakshmi S

Keyword(s):

Antioxidant Activity ◽

Marine Algae ◽

Biological Activities ◽

Radical Scavenging ◽

Reducing Power ◽

Inflammatory Activity ◽

Diffusion Method ◽

Dpph Method ◽

Anti Inflammatory

Objective: Determination of biological activities of marine algae collected from the Visakhapatnam coastal region.Methods: Antibacterial activity of algal extracts determined by the well diffusion method, antioxidant activity was determined by reducing power (RP) method and 1, 1-diphenyl-2-picryl-hydrazil (DPPH) radical scavenging method finally anti-inflammatory activity was determined by human red blood cell stabilization method and egg albumin method.Results: Methanolic extracts of three algae have potential inhibition activity against Escherichia coli, Bacillus subtilis, Pseudomonas aeruginosa, and Staphylococcus aureus. Green alga Enteromorpha compressa has better antioxidant activity compared to the Gracilaria arcuata and Ulva fasciata when tested in RP and DPPH method. U. fasciata found good anti-inflammatory activity among the selected three algae.Conclusion: The three tested algae exhibited significant antibacterial and antioxidant activity compared to anti-inflammatory activity. These bioactive compounds containing macroalgae may find their commercial potential in medicine, food, and cosmetic industry

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