antioxidant activity of polyphenolic plant extracts

Inhibition of Carbohydrate Hydrolysing Enzymes

These extracts were tested on α-amylase and α-glucosidase inhibitory activities mode of enzyme inhibition total polyphenolic content (TPC) and antioxidant capabilities Methanolic bark extract of Beilschmiedia insignis demonstrated optimum inhibitory effects against α-amylase and α-glucosidase with IC 50 values of 3 233 g/mL and 12 357

Polyphenolic Content Antioxidant Potential and

scavenging activity FRAP assay Antioxidant capacity of plant sample was analyzed by FRAP assay [13] According to this method ferric ion reducing antioxidant power of extracts were assessed by measuring the reduction of ferric ions to ferrous ions This technique is

Assessment of Potential Antioxidant Activity of

activity of plant polyphenolic fraction The percent change was calculated using equation as follows: DPPH scavenging activity (%) = [(A 0-A 1)/A 0] x 100 where A 0 was the absorbance of the control and A 1 was the absorbance of the sample or standard (2) Total antioxidant activity: The total antioxidant activity of

Quali

Antioxidant activities of an hydroalcoholic extract both decoction and tea from Olea leaves were evaluated by means of the DPPH method (in vitro test) All the tested extracts efficiently scavenged the DPPH free radical and consequently a pharmacological use of the olive leaf tissue seems plausible

Polyphenolic and biological activities of leaves extracts

Dec 01 2010The antioxidant activity of A subfusiformis is relatively greater than that of U urens This may be due to relatively higher polyphenolic contents of the extracts of A subfusiformis Antioxidant activities: The effect of antioxidants on DPPH is thought to be due to their hydrogen donating ability (Yu et al 2002)

Characterisation and Antioxidant Activity of Crude Extract

Aug 17 2016Furthermore C incanus polyphenolic-rich extracts have been reported to possess antimycotic antibacterial and antiviral properties [17 18 19 20 21] Recently aqueous extracts of the aerial parts of this plant have been demonstrated to exert intense antioxidant capacities that could be attributed to their high polyphenol content [22 23]

Antioxidant activity of polyphenolic extracts of

In the present study antioxidant activities by (1 1-diphenyl-2-picrylhydrazyl radical (DPPH) hydrogen peroxide hydroxyl radical inhibition hemolysis by hydrogen peroxide assay reducing power and total antioxidant activities of polyphenolic extract of Ichnocarpus frutescens leaves were investigated The flavonoids and total polyphenolic contents of the extract were also determined using

Antioxidant activity of polyphenolic extracts of

ORIGINAL ARTICLE Antioxidant activity of polyphenolic extracts of Ichnocarpus frutescens C T Kumarappan * E Thilagam Subhash C Mandal Phytotherapy Research Laboratory Department of Pharmaceutical Technology Jadavpur University Kolkata 700 032 India

Frontiers

May 27 2016In order to assess the intracellular antioxidant activity of red grape skin polyphenolic extracts on superficial colonocytes explants were pre-incubated for 1 h with the extract (1:100 dilution) and then washed three times with the Hepes-Tris buffer solution before to CM-H2DCFDA charging and H 2 O 2 exposure The 1:100 dilution was chosen on

Frontiers

May 27 2016In order to assess the intracellular antioxidant activity of red grape skin polyphenolic extracts on superficial colonocytes explants were pre-incubated for 1 h with the extract (1:100 dilution) and then washed three times with the Hepes-Tris buffer solution before to CM-H2DCFDA charging and H 2 O 2 exposure The 1:100 dilution was chosen on

Antioxidant and Antibacterial Properties of

There is no much information about the antioxidant and antibacterial activities of the two plants growing in the Tunisian coasts The most of studies conducted confirmed the responses of these plants to the abiotic stresses We demonstrate a high antioxidant activity in the two plant extracts by using the 1 1-diphenyl-2-picrylhydrazyl (DPPH

Polyphenolic composition and antioxidant activity of

Polyphenolic composition and antioxidant activity of Kenyan Tea cultivars Karori S M Wachira F N Ngure R M and Mireji P O Abstract Polyphenolic fractions in tea are potent bioactive molecules In this study the polyphenolic composition of 25 different types of Kenyan tea cultivars was determined using the HPLC and the Folins Ciocalteus

Frontiers

May 27 2016In order to assess the intracellular antioxidant activity of red grape skin polyphenolic extracts on superficial colonocytes explants were pre-incubated for 1 h with the extract (1:100 dilution) and then washed three times with the Hepes-Tris buffer solution before to CM-H2DCFDA charging and H 2 O 2 exposure The 1:100 dilution was chosen on

Antioxidant activity of polyphenolic extract of Terminalia

radicals The activity of the extract may be due to the total polyphenolic content The antioxidant activity of the extract is significantly higher than the standard ascorbic acid and its activity is concentration-dependent It is concluded that a polyphenolic-rich fraction of T chebula fruits is a potential source of natural antioxidants

Antioxidant effect of polyphenols and natural phenols

A polyphenol antioxidant is a hypothetical type of antioxidant containing a polyphenolic substructure and studied in vitro Numbering over 4 000 distinct species mostly from plants polyphenols may have antioxidant activity in vitro but are unlikely to be antioxidants in vivo Hypothetically they may affect cell-to-cell signaling receptor sensitivity inflammatory enzyme activity or gene

Antioxidant activity of polyphenolic extract of

Apr 12 2015This activity of the extract may be due to the total polyphenolic contents present in it The present study concluded that a polyphenolic rich fraction of P emblica fruits is a potential source of natural antioxidants and thus could prevent oxidative stress induced by heavy metal toxicants

The antioxidant activity and polyphenolic contents of

Different plant seeds extracts of Citrus sinensis Hordeum sativum Triticum sativum Canna indica Citrullus vulgaris and Capsicum annuum were evaluated for their antioxidant activity by the following methods: 2 2-diphenyl-1-pycril-hydrazyl (DPPH) radical scavenging reducing power RBCs hemolysis and linoleic acid oxidation a long with the determination of total phenolic and flavonoids

In Vitro Screening for Anti

Jan 23 2014The antioxidant activities of the methanolic extracts were correlated to the total polyphenolic content using Pearson's test (r = 0 7456 P0 05) The lowest IC 50 values were obtained for Emblica officinalis (70 9 g/ml) and Terminalia chebula (8 50 5 g/ml) whereas the values for the positive controls ascorbic acid and gallic acid

Antioxidant potentials of polyphenolic extracts from

Antioxidant potentials of polyphenolic extracts from leaves of trees and fruit bushes The aim of the work was to determine the antioxidant potential of extracts from leaves of strawberry blackcurrant and apple in relation to lipids contained in the erythrocyte membrane

Antioxidant activity of polyphenolic extract of Terminalia

radicals The activity of the extract may be due to the total polyphenolic content The antioxidant activity of the extract is significantly higher than the standard ascorbic acid and its activity is concentration-dependent It is concluded that a polyphenolic-rich fraction of T chebula fruits is a potential source of natural antioxidants

Variation in Polyphenolic Profiles Antioxidant and

May 19 2018A comparative study was carried out on the methanolic extracts from six Achillea species and the examined polyphenols from these plants on the formation of advanced glycation end‐products (AGE) in vitro A pachycephala which was richer in flavonoids (15 mg quercetin/g W) and phenolics (111 10 mg tannic acid/g DW) with substantial antioxidant activity (IC 50 = 365 5 μg/ml) presented

Antioxidant activity of polyphenolic extracts of

The total antioxidant and free radical scavenging of the polyphenolic extract of I frutescens can be attributed to the presence of enriched polyphenolic compounds Polyphenols anthocyanins and flavonoids are very valuable plant constituents in the scavenging of free radicals due to their several phenolic hydroxyl groups ( Hatano et al 1988 )

Anti

Polyphenolic-rich extract Nanofiltration Antioxidant Lipoxygenase Cyclooxygenase In vivo anti-inflammatory a b s t r a c t This study evaluated the anti-inflammatory and antioxidant activities of Impatiens noli-tangere L Bal-saminaceae and of StachysofficinalisL Lamiaceae polyphenolic-rich extracts obtained by nanofiltration process

Variation in Polyphenolic Profiles Antioxidant and

May 19 2018A comparative study was carried out on the methanolic extracts from six Achillea species and the examined polyphenols from these plants on the formation of advanced glycation end‐products (AGE) in vitro A pachycephala which was richer in flavonoids (15 mg quercetin/g W) and phenolics (111 10 mg tannic acid/g DW) with substantial antioxidant activity (IC 50 = 365 5 μg/ml) presented

Antioxidant Activity of Plant Extracts Containing Phenolic

The antioxidative activity of a total of 92 phenolic extracts from edible and nonedible plant materials (berries fruits vegetables herbs cereals tree materials plant sprouts and seeds) was examined by autoxidation of methyl linoleate The content of total phenolics in the extracts was determined spectrometrically according to the Folin−Ciocalteu procedure and calculated as gallic acid

Assessment of Potential Antioxidant Activity of

activity of plant polyphenolic fraction The percent change was calculated using equation as follows: DPPH scavenging activity (%) = [(A 0-A 1)/A 0] x 100 where A 0 was the absorbance of the control and A 1 was the absorbance of the sample or standard (2) Total antioxidant activity: The total antioxidant activity of

Antioxidant activity of plant extracts containing phenolic

Among edible plant materials remarkable high antioxidant activity and high total phenolic content (GAE 20 mg/g) were found in berries especially aronia and crowberry Apple extracts (two varieties) showed also strong antioxidant activity even though the total phenolic contents were low (GAE 12 1 mg/g)

Health Status Improved by Aronia Melanocarpa Polyphenolic

Jun 20 2016The antioxidant activity of increased significantly i e by 97 46% (p 0 001) in the animals in the DM+P group unlike the same activity in the animals included in the DM group This phenomenon is due to the polyphenol protection by direct mechanism of microsomal hepatic membranes and proteins against the destructive action of ROS

Antioxidant Activity of Plant Extracts Containing Phenolic

The antioxidative activity of a total of 92 phenolic extracts from edible and nonedible plant materials (berries fruits vegetables herbs cereals tree materials plant sprouts and seeds) was examined by autoxidation of methyl linoleate The content of total phenolics in the extracts was determined spectrometrically according to the Folin−Ciocalteu procedure and calculated as gallic acid

Evaluation of Polyphenolic Content and Antioxidant

of many ailments and diseases In this work aqueous extract of the plant was screened for its phenolic profile and antioxidant activity The results obtained revealed that the extract has considerable amount f o polyphenolic compounds including phenol flavonoid flavonol and proanthocyanidin The extract

Antioxidant activity of plant extracts containing phenolic

DOI: 10 1021/jf990146l Corpus ID: 22888581 Antioxidant activity of plant extracts containing phenolic compounds article{Khknen1999AntioxidantAO title={Antioxidant activity of plant extracts containing phenolic compounds } author={Marja P K{a}hk{o}nen and Anu Hopia and Heikki J Vuorela and J P Rauha and Kalevi Pihlaja and T S Kujala and Mika Heinonen} journal={Journal of agricultural