scholarly journals Anti-oxidant, hypoglycemic and anti-hyperglycemic properties of Syzygium calophyllifolium

2015 ◽  
Vol 10 (3) ◽  
pp. 672 ◽  
Author(s):  
Rahul Chandran ◽  
Saikumar Sathyanarayanan ◽  
Murugan Rajan ◽  
Muniyandi Kasipandi ◽  
Thangaraj Parimelazhagan
Keyword(s):  
Metal Ion ◽  
Methanol Extract ◽  
Ethyl Acetate Extract ◽  
Radical Scavenging ◽  
Diabetic Rats ◽  
Total Phenolic ◽  
Radical Scavenger ◽  
Oral Glucose ◽  
Flavonoid Content ◽  
Anti Oxidant

<p class="Abstract">The article discusses anti-oxidant oral glucose tolerance and anti-hyperglycemic potentials of <em>Syzygium calophyllifolium</em>. Extracts from successive solvent extraction were tested for the total phenolic, tannin, flavonoid content and free radical scavenging property using DPPH, ABTS<sup>+</sup>, phosphomolyb-denum, FRAP, superoxide and metal chelating assays. Ethyl acetate extract of bark responded well against DPPH (IC<sub>50</sub> 4.13), ABTS<sup>+</sup> (36832.29 µM TE/ g extract),phosphomolybdenum (100.4 g AAE/100g extract), superoxide and metal ion radicals. The methanol extract of bark was also found as an effective radical scavenger. The leaf methanol extract also showed significant anti-oxidant ability. The bark methanol extract could potentially reduce the blood glucose level in glucose loaded and diabetic rats. The immense anti-oxidant potential of <em>S. calophyllifolium</em> leaf and bark extracts could be taken as a good source of natural anti-oxidant supplement in food to defend oxidative stress related disorders like diabetes.</p><p> </p>

scholarly journals Anti-oxidant activity of methanolic extract of aquatic flowering plant Nymphaea capensis leaf

2020 ◽  
Author(s):  
Mohammad Alam ◽  
Md. Shahrear Biozid ◽  
Md. Faruk ◽  
Md. Jainul Abeden ◽  
Khandoker Usran Ferdous ◽  
...  
Keyword(s):  
Ascorbic Acid ◽  
Methanol Extract ◽  
Radical Scavenging ◽  
Reducing Power ◽  
Total Flavonoid ◽  
Flowering Plant ◽  
Total Phenolic ◽  
Total Flavonoid Content ◽  
Flavonoid Content ◽  
Anti Oxidant

Abstract Background: Nymphaea capensis is an aquatic flowering plant which is included in the family of Nymphaeaceae. Literature review on the plants of Nymphaeaceae family exhibited significant medicinal activities. Therefore, the objective of the present study is to evaluate possible anti-oxidant activity of crude methanol extract of N. capensis leaf.Method: In antioxidant study, methanolic plant extract was evaluated for 1,1-diphenyl,2-picrylhydrazyl (DPPH) and reducing power capacity. Moreover, total phenolic and total flavonoid content of plant extracts were determined and expressed in mg of gallic acid equivalent per gram of dry sample (mg GAE/g dry weight).Result: In the DPPH free radical scavenging assay, methanol extract showed concentration dependent inhibition of the free radicals. IC50 of Ascorbic acid was 14.84 µg/ml whereas N. capensis was 130.94 µg/ml. In case of reducing capacity, at conc. 62.5, 125, 250, 500, 1000 ug/ml, the absorbances of Ascorbic acid were 0.65, 1.12, 1.45, 1.78 and 1.89 respectively. In case of N. capensis, the absorbances were 0.46, 0.75, 1.04, 1.27 and 1.50 respectively. The extract displayed a concentration dependent increase in reducing power. In the case of total phenolic content, the methanol extract of N. capensis contained a considerable amount of phenolic contents which was 215±7 of GAE mg/g. In the case of total flavonoid content, methanol extract of N. capensis contained significant amount of flavonoid contents which was 184.75±6.78 of GAE mg/g.Conclusion: These results suggested that the methanol extract of N. capensis possess considerable anti-oxidant activity.

scholarly journals Determination of Total Phenolic Content and Antioxidant Activity of the Whole Plant Extracts of Argyreia imbricata (Roth) Sant. & Patel

2021 ◽  
Vol 12 (1) ◽  
pp. 919-625
Author(s):  
Sebastin V ◽  
Gopalakrishnan G ◽  
Sreejith M ◽  
Anoob Kumar K I
Keyword(s):  
Ethyl Acetate ◽  
Methanol Extract ◽  
Phenolic Content ◽  
Ethyl Acetate Extract ◽  
Radical Scavenging ◽  
Total Phenolic ◽  
Significant Activity ◽  
Whole Plant ◽  
Nitric Oxide Radical ◽  
Anti Oxidant

Plants of the genus Argyreia  posses’ ethno medicinal importance and various pharmacological activities are also reported. In this study, phenolic content, anti-oxidant potential of different extracts of Argyreia imbricata was evaluated. Extraction of powdered whole plant material was done with different solvents viz., petroleum ether, chloroform, ethyl acetate and methanol by soxhelation. The estimation of phenolics in the selected extracts of Argyreia imbricata was done by using a Folin-Ciocalteau reagent. The antioxidant potential of different extracts was evaluated by total anti-oxidant capacity, DPPH, hydroxyl and nitric oxide radical scavenging and reducing power assay methods. In the phenolics estimation, the methanol extract showed a significant presence of phenolic content followed by ethyl acetate extract. In case of anti-oxidant activity, the methanol and ethyl acetate extract showed a significant activity based on their concentration. The findings of this study clearly revealed the potential of methanol extract of A. imbricata in phenolic content and anti-oxidant activity. Also, the ethyl acetate extract showed significant results. Further studies on identification, isolation of the active constituents, toxicity evaluations may give useful results.

scholarly journals Anti-oxidant activity of methanolic extract of aquatic flowering plant Nymphaea capensis leaf

2020 ◽  
Author(s):  
Mohammad Alam ◽  
Md. Shahrear Biozid ◽  
Md. Faruk ◽  
Md. Jainul Abeden ◽  
Khandoker Usran Ferdous ◽  
...  
Keyword(s):  
Ascorbic Acid ◽  
Methanol Extract ◽  
Radical Scavenging ◽  
Reducing Power ◽  
Total Flavonoid ◽  
Flowering Plant ◽  
Total Phenolic ◽  
Total Flavonoid Content ◽  
Flavonoid Content ◽  
Anti Oxidant

Abstract Background: Nymphaea capensis is an aquatic flowering plant which is included in the family of Nymphaeaceae. Literature review on the plants of Nymphaeaceae family exhibited significant medicinal activities. Therefore, the objective of the present study is to evaluate possible anti-oxidant activity of crude methanol extract of N. capensis leaf.Method: In antioxidant study, methanolic plant extract was evaluated for 1,1-diphenyl,2-picrylhydrazyl (DPPH) and reducing power capacity. Moreover, total phenolic and total flavonoid content of plant extracts were determined and expressed in mg of gallic acid equivalent per gram of dry sample (mg GAE/g dry weight).Result: In the DPPH free radical scavenging assay, methanol extract showed concentration dependent inhibition of the free radicals. IC50 of Ascorbic acid was 14.84 µg/ml whereas N. capensis was 130.94 µg/ml. In case of reducing capacity, at conc. 62.5, 125, 250, 500, 1000 ug/ml, the absorbances of Ascorbic acid were 0.65, 1.12, 1.45, 1.78 and 1.89 respectively. In case of N. capensis, the absorbances were 0.46, 0.75, 1.04, 1.27 and 1.50 respectively. The extract displayed a concentration dependent increase in reducing power. In the case of total phenolic content, the methanol extract of N. capensis contained a considerable amount of phenolic contents which was 215±7 of GAE/g. In the case of total flavonoid content, methanol extract of N. capensis contained significant amount of flavonoid contents which was 184.75±6.78 of GAE/g.

scholarly journals Effects of solvent extraction system on antioxidant activity of Lamium purpureum L.

2017 ◽  
Vol 71 (5) ◽  
pp. 361-370
Author(s):  
Slavica Grujic ◽  
Ana Dzamic ◽  
Violeta Mitic ◽  
Vesna Stankov-Jovanovic ◽  
P.D. Marin ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Methanol Extract ◽  
Phenolic Content ◽  
Radical Scavenging Activity ◽  
Antioxidant Properties ◽  
Radical Scavenging ◽  
Reducing Power ◽  
Total Phenolic ◽  
Radical Scavenger ◽  
Scavenging Activity

Antioxidant and free radical scavenging activity of methanol, ethanol, ethyl acetate and chloroform extracts of aerial parts of Lamium purpureum L. was determined by DPPH, ABTS, FRAP and TRP assays. Contents of flavonoids and phenols were also investigated. The total phenolic content in the extracts, determined using Folin?Ciocalteu assay, ranged between 8.57 to 128.00 mg GAE/g d.e. while concentrations of flavonoids in the extracts varied from 24.20 to 39.80 mg QuE/g d.e. The highest phenolic content was found in methanol extract (128.00 mg GAE/g d.e.). The highest content of total flavonoids was identified in the methanol extract (39.80 mg QuE/g d.e.) and the lowest was in the chloroform (24.30 mg QuE/g d.e.). DPPH scavenging of the extracts was determined and obtained IC50 values ranged from 0.12 to 3.12 mg/mL of solution. The values of ABTS radical scavenging activity ranged from 0.35 to 1.80 mg AA/g. The highest ABTS antiradical activity was registered for methanol extract. The FRAP value was found within the range 0.08 to 1.04 ?mol Fe/mg. The best radical scavenger was methanol (1.04 ?mol Fe/mg). In reducing power assay different extracts of L. purpureum showed increasing of activity with increased concentration, and all extracts possessed substantial dose dependent antioxidant activity. The best reducing capacity was obtained with methanol extract of L. purpureum (0.0132 mg AA/mL). The results in this study confirmed that L. purpureum possesses moderate antioxidant properties.

scholarly journals Assessment of Total Phenolic, Flavonoid Content and Antioxidant Activity of Ocimum sanctum Linn

2019 ◽  
Vol 40 ◽  
pp. 30-35
Author(s):  
Ishwor Pathak ◽  
Muna Niraula
Keyword(s):  
Antioxidant Activity ◽  
Methanol Extract ◽  
Colorimetric Method ◽  
Radical Scavenging ◽  
Hexane Extract ◽  
Ocimum Sanctum ◽  
Total Phenolic ◽  
Flavonoid Content ◽  
Ic50 Value ◽  
Phenolic And Flavonoid

Ocimum sanctum, commonly known as Tulasi in Nepal, is a pharmacologically important plant due to its active constituents. In this work, extraction was carried out in hexane, chloroform and methanol solvents and their phytochemical screening was performed. Total phenolic and flavonoid contents in the plant were measured by Folin-Ciocalteu colorimetric method and aluminum chloride colorimetric method respectively. Antioxidant activity of the extracts was evaluated using 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical scavenging assay. Alkaloids, flavonoids, tannins, glycosides, polyphenols, terpenoids, tannins and steroids are mainly found in the extracts. Based on the result obtained, the plant posses a significant amount of total phenolic and total flavonoid content. Both phenolic and flavonoid contents were highest in methanol extract, followed by chloroform and hexane extract. Antioxidant activity of the extracts as ascorbic acid standard (IC50 value = 41.34 µg/mL) was in the order of methanol extract (IC50 value = 47.73 µg/mL) > chloroform extract (IC50 value = 79.46 µg/mL) > hexane extract (IC50 value = 94.68 µg/mL). The extent of the antioxidant activity of the plant is following the number of total phenolics and flavonoids present in it.

scholarly journals UNRIPE FRUIT OF RUBUS FRAXINIFOLIUS AS A POTENTIAL SOURCE OF ANTIOXIDANT AND ANTIELASTASE AGENT

2021 ◽  
pp. 78-81
Author(s):  
YESI DESMIATY ◽  
BERNA ELYA
Keyword(s):  
Ethyl Acetate ◽  
Methanolic Extract ◽  
Total Flavonoid ◽  
Total Phenolic ◽  
Radical Scavenger ◽  
Flavonoid Content ◽  
Unripe Fruit ◽  
Potential Source ◽  
Soxhlet Apparatus ◽  
Anti Oxidant

Objective: This research aimed to examine the anti-oxidant activity, antielastase activity, and the content of total phenolic and total flavonoid of R. fraxinifolius unripe fruit. Methods: The dried unripe fruit was extracted using Soxhlet apparatus with sequence solvent: n-hexane, ethyl acetate, and methanol. Each extract was determined the anti-oxidant and antielastase activity, total phenolic, and total flavonoid content. Result: The result showed the extracts (n-hexane, ethyl acetate, and methanol) gave anti-oxidant IC50>200; 186.84; and 19.74 ppm, and the ability of elastase inhibition was 6.84+0.9%; 52.23+7.1%; and 57.81+5.5% at 100 ppm, respectively. The methanolic extract contained phenolic 202.2 mg GAE/g extract and flavonoid 43.89 mg QE/g extract. Conclusion: R. fraxinifolius unripe fruit has shown potential as a DPPH (α, α-diphenyl-β-picrylhydrazyl) radical scavenger and anti-elastase. This study provides an excellent effect to underline the importance of R. fraxinifolius unripe fruit, and it can be developed as nutricosmetics, nutraceuticals, or herbal anti-wrinkle cosmetics.

scholarly journals In Vitro Evaluation of Antioxidant and Antimicrobial Activity of Carrot Peel

2018 ◽  
Vol 9 (07) ◽  
Author(s):  
Sheila John ◽  
Priyadarshini S. ◽  
Sarah Jane Monica ◽  
Sivaraj C. ◽  
Arumugam P.
Keyword(s):  
Total Phenolic Content ◽  
Methanol Extract ◽  
Phenolic Content ◽  
Radical Scavenging ◽  
Reducing Power ◽  
Acetone Extract ◽  
Total Phenolic ◽  
Klebsiella Pneumonia ◽  
Flavonoid Content ◽  
Food Ingredient

The objectives of the study were to assess the total phenolic content and flavonoid content, and to investigate the antioxidant and antimicrobial potential of carrot peel extracted with methanol and acetone. Total Phenolic content and Flavonoid content was higher in carrot peel acetone extract (AE) i.e. 106.36 µg/mg of GAE and 27.83 µg/mg of QE respectively than methanol extract (ME). Carrot peel acetone extract showed greater antioxidant capacity for DPPH radical scavenging activity whereas methanol extract showed better result for FRAP reducing power and Phosphomolybdenum assay. Both AE and ME could inhibit the growth of Shigella flexneri, E coli, Staphylococcus aureus and Klebsiella pneumonia. This study substantiates the potential of carrot peel to be used as a novel functional food ingredient, natural antioxidant and antimicrobial agent

scholarly journals Phytochemical Evaluation of Some Medicinal Plants of Puthan District of Nepal

2020 ◽  
Vol 19 (1) ◽  
pp. 97-106
Author(s):  
Hari Giri ◽  
Meena Rajbhandari
Keyword(s):  
Medicinal Plants ◽  
Methanol Extract ◽  
Radical Scavenging Activity ◽  
Radical Scavenging ◽  
Aqueous Acetone ◽  
Total Phenolic ◽  
Scavenging Activity ◽  
Flavonoid Content ◽  
Phenolic And Flavonoid ◽  
Different Parts

Different parts of eleven medicinal plants used in the traditional medicine in Puthan district were collected. Three different extracts, methanol, 50% aqueous methanoland 70% aqueous acetone extractswere prepared for each plant material. The methanol extractswere screened for the presence of different classes of phytochemicals. Total phenolic andflavonoid content, as well as DPPH freeradical scavenging activity, were evaluated. All the investigated extracts contain a high amount of phenolics and flavonoids.The highest amount of phenolicsand flavonoids were detected in the methanolextract of bark of Bauhinia variegate(355.35+3.69 mg GAE/g and 209.23 ±1.25 mg QE/g extract). Among the eight tested extracts, the highest radical scavenging activity was shown by methanol extract of bark of B. variegate (IC50 3.68 μg/ml). The extract having the highest phenolic and flavonoid content showed the lowest IC50 demonstrating the positive correlation between radical scavenging activity and total phenolic and flavonoid content.

scholarly journals EVALUATION OF ANTIOXIDANT, Α-GLUCOSIDASE AND Α-AMYLASE INHIBITORY ACTIVITIES OF ATALANTIA RACEMOSA AND SENNA UNIFLORA LEAVES

2018 ◽  
Vol 11 (5) ◽  
pp. 254
Author(s):  
Adhav Rahul ◽  
Deokule Subhash
Keyword(s):  
Ethyl Acetate ◽  
Sulfonic Acid ◽  
Ethyl Acetate Extract ◽  
Radical Scavenging Activity ◽  
Radical Scavenging ◽  
Free Radical Scavenger ◽  
Radical Scavenger ◽  
Inhibition Assay ◽  
Flavonoid Content ◽  
Inhibitory Activities

 Objective: The current investigation was conducted to investigate the total phenol, total flavonoid content, antioxidant, α-glucosidase, and α-amylase activities in leaves of Atalantia racemosa and Senna uniflora. Methods: Different crude solvent extracts were prepared and concentrated using rotary evaporator, these solvent extracts were tested to estimate the antioxidant radical scavenging activity using 1,1-diphenyl-2-picryl-hydrazyl (DPPH) and 2, 2’-azinobis, 3-ethylbenzothiazoline-6-sulfonic acid (ABTS) methods using spectrophotometer. The extracts were screened by α-amylase inhibition assay and α-glucosidase inhibition assay to estimate the antidiabetic potential of the studied plant with the help of microplate reader.Results: A potent antioxidant activity, i.e. mean percentage inhibition of DPPH and ABTS radical was observed in A. racemosa ethanol (71.5 ± 0.026%) and ethyl acetate extract (97.3 ± 0.076%), respectively, at the concentration of 400 μg/mL. Similarly, highest α-amylase and α-glucosidase inhibitory activities were observed in A. racemosa methanolic (82.4 ± 0.016%) and ethyl acetate 91.1±0.018 extracts, respectively.Conclusions: The present study revealed that the A. racemosa extracts possessed good antioxidant, α-amylase and α-glucosidase inhibitory activities; hence, it can be used as a source of natural free radical scavenger and antidiabetic supplement(s). However, further study needs to be carried out to know the active compound and its mode of action.

scholarly journals ISOLATION OF QUERCETIN FROM FLOWER PETALS, ESTIMATION OF TOTAL PHENOLIC, TOTAL FLAVONOID AND ANTIOXIDANT ACTIVITY OF THE DIFFERENT PARTS OF RHODODENDRON ARBOREUM SMITH

2015 ◽  
Vol 12 (12) ◽  
pp. 34-40 ◽  
Author(s):  
Laxman Bhandari ◽  
Meena Rajbhandari
Keyword(s):  
Antioxidant Activity ◽  
Methanol Extract ◽  
Phenolic Content ◽  
Radical Scavenging ◽  
Acetone Extract ◽  
Total Flavonoid ◽  
Total Phenolic ◽  
Total Flavonoid Content ◽  
Flavonoid Content ◽  
Different Parts

The flowers of Rhododendron arboreum Smith is a source of polyphenolic compounds. A flavonol, quercetin, was isolated from ethyl acetate fraction of the methanol extract of flower petals of R. arboreum by repeated Sephadex LH-20 column chromatography. Isolated quercetin was characterized by comparing melting point, Rf values, UV and IR spectra with authentic quercetin. The isolated quercetin was used as a standard for the estimation of total flavonoids.  Total phenolic and total flavonoid content in different parts of R. arboreum was carried out spectrophotometrically using Folin-Ciocalteu reagent and Aluminium chloride reagent respectively. Gallic acid and quercetin were used as standard for the construction of calibration curve of phenolic and flavonoid respectively. The results showed that the highest total phenolic content was detected in the 70% acetone extract of the flowers (600 mg GAE/g extract) and petals (600 mg GAE/g extract) and the lowest amount was detected in methanol extract of stem (188 mg GAE/g extract). Similarly, the highest total flavonoid was detected in the 70% acetone extract of the twigs (170 mg QE/g extract) and the lowest amount was detected in the methanol extract of stem (45 mg QE/g extract).  The antioxidant activity of the methanol extracts obtained from different parts of R. arboreum was determined by 2, 2- diphenyl-1-picryl hydrazyl (DPPH) assay and the radical scavenging activity (IC50) was calculated. The highest free radical scavenging effect was observed in leaves with IC50=8.34 ?g/ml and lowest was observed in stem with IC50=67.83 ?g/ml. The IC50 values, total phenolic and total flavonoid content (correlation coefficient R2= 0.923 for phenolic, R2= 0.965 for flavonoid) were correlated which showed strong correlation indicating that the major components responsible for antioxidant activity is phenolics. The highest the phenolic content, the lowest the IC50 value observed. The result indicated that R. arboreum is a rich source of high value polyphenols as natural antioxidant to use in preventive medicine as well as in food and pharmaceutical industry.Scientific World, Vol. 12, No. 12, September 2014, page 34-40         

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