Antioxidative and Free Radical Scavenging Properties of Ethyl Acetate Fractions of Persea americana Seed and Bryophyllum pinnatum Leaf

2021 ◽  
Vol 5 (8) ◽  
pp. 1486-1492
Keyword(s):  
Free Radical ◽  
Ethyl Acetate ◽  
Radical Scavenging ◽  
Free Radical Scavenging ◽  
Persea Americana ◽  
Radical Scavenging Properties ◽  
Bryophyllum Pinnatum

scholarly journals EVALUATION OF ANTIOXIDANT AND FREE RADICAL SCAVENGING ACTIVITIES OF DIFFERENT SOLVENT EXTRACTS OF LEAVES OF PIPER UMBELLATUM

2017 ◽  
Vol 10 (2) ◽  
pp. 274
Author(s):  
Sethupandian Geetha ◽  
Kokkaiah Irulandi ◽  
Palanichamy Mehalingam
Keyword(s):  
Antioxidant Activity ◽  
Free Radical ◽  
Ethyl Acetate ◽  
Methanol Extract ◽  
Radical Scavenging Activity ◽  
Radical Scavenging ◽  
Reducing Power ◽  
Free Radical Scavenging ◽  
Frap Assay ◽  
Radical Scavenging Properties

Objective: This study was designed to determine the Total phenol, flavonoid content, antioxidant and free radical scavenging properties of different solvent extracts of Piper umbellatum.  Methods: Different solvent extracts evaluated with DPPH radical scavenging activity and Reducing power activity.Results: The presence of phenol and flavonoid showed highly in the methanol extracts than ethyl acetate and acetone extracts. All the extracts have various level of antioxidant activity. Methanol solvent extract have good extraction and show significant antioxidant activity. The effect of reducing power of methanol extract revealed good antioxidant activity compare with other tested extracts.Conclusion: On the basis of the above results we concluded that methanol extract of Piper umbellatum whole plant extracts shows significant antioxidant activity than ethyl acetate and acetone extracts.Keywords: Piper umbellatum, Antioxidant, DPPH, FRAP assay, Polar, Non polar solvents

scholarly journals Chemical Analysis, Toxicity Study, and Free-Radical Scavenging and Iron-Binding Assays Involving Coffee (Coffea arabica) Extracts

Molecules ◽  
2021 ◽  
Vol 26 (14) ◽  
pp. 4169
Author(s):  
Nuntouchaporn Hutachok ◽  
Pimpisid Koonyosying ◽  
Tanachai Pankasemsuk ◽  
Pongsak Angkasith ◽  
Chaiwat Chumpun ◽  
...  
Keyword(s):  
Free Radical ◽  
Mononuclear Cells ◽  
Radical Scavenging ◽  
Free Radical Scavenging ◽  
Chemical Compositions ◽  
Coffee Bean ◽  
Dependent Manner ◽  
Roasted Coffee ◽  
Instant Coffee ◽  
Radical Scavenging Properties

We aimed to analyze the chemical compositions in Arabica coffee bean extracts, assess the relevant antioxidant and iron-chelating activities in coffee extracts and instant coffee, and evaluate the toxicity in roasted coffee. Coffee beans were extracted using boiling, drip-filtered and espresso brewing methods. Certain phenolics were investigated including trigonelline, caffeic acid and their derivatives, gallic acid, epicatechin, chlorogenic acid (CGA) and their derivatives, p-coumaroylquinic acid, p-coumaroyl glucoside, the rutin and syringic acid that exist in green and roasted coffee extracts, along with dimethoxycinnamic acid, caffeoylarbutin and cymaroside that may be present in green coffee bean extracts. Different phytochemicals were also detected in all of the coffee extracts. Roasted coffee extracts and instant coffees exhibited free-radical scavenging properties in a dose-dependent manner, for which drip coffee was observed to be the most effective (p < 0.05). All coffee extracts, instant coffee varieties and CGA could effectively bind ferric ion in a concentration-dependent manner resulting in an iron-bound complex. Roasted coffee extracts were neither toxic to normal mononuclear cells nor breast cancer cells. The findings indicate that phenolics, particularly CGA, could effectively contribute to the iron-chelating and free-radical scavenging properties observed in coffee brews. Thus, coffee may possess high pharmacological value and could be utilized as a health beverage.

Free radical scavenging properties and phenolic characterization of some edible plants

2009 ◽  
Vol 114 (1) ◽  
pp. 276-281 ◽  
Author(s):  
Ilkay Orhan ◽  
Murat Kartal ◽  
Mahmoud Abu-Asaker ◽  
F. Sezer Şenol ◽  
Gülderen Yilmaz ◽  
...  
Keyword(s):  
Free Radical ◽  
Radical Scavenging ◽  
Free Radical Scavenging ◽  
Edible Plants ◽  
Radical Scavenging Properties

Antihypertensive and free radical scavenging properties of enzymatic rapeseed protein hydrolysates

2013 ◽  
Vol 141 (1) ◽  
pp. 153-159 ◽  
Author(s):  
Rong He ◽  
Adeola Alashi ◽  
Sunday A. Malomo ◽  
Abraham T. Girgih ◽  
Dongfang Chao ◽  
...  
Keyword(s):  
Free Radical ◽  
Radical Scavenging ◽  
Free Radical Scavenging ◽  
Protein Hydrolysates ◽  
Rapeseed Protein ◽  
Rapeseed Protein Hydrolysates ◽  
Radical Scavenging Properties

scholarly journals Antioxidant and antimicrobial activities against Enterobacter cloacae of extracts of Eclipta alba Hassk.

2016 ◽  
Vol 19 (4) ◽  
pp. 76-83
Author(s):  
Trang Thi Xuan Dai ◽  
Anh Thi Tu Vo
Keyword(s):  
Free Radical ◽  
Vitamin C ◽  
Ethyl Acetate ◽  
Ethyl Acetate Extract ◽  
Antioxidant Properties ◽  
Radical Scavenging ◽  
Enterobacter Cloacae ◽  
Free Radical Scavenging ◽  
Antioxidant Vitamin ◽  
Eclipta Alba

This study was subjected to investigate antimicrobial and antioxidant properties of Eclipta alba extracts (methanol, hexane, chloroform and ethyl acetate extracts). The antioxidant property of the extract was assessed by 2,2- diphenyl-1-picrylhydrazyl (DPPH) free radical scavenging method. Kirby-Bauer method was used to determine the antibacterial activity against Enterobacter cloacae of the extracts. The extracts of Eclipta alba were tested against E. cloacae. The highest antibacterial potentiality was exhibited by the ethyl acetate extract of E. alba leaves, means of zones of bacterial growth inhibition are 26.3 mm at a concentration of 32 μg/mL. DPPH free radical scavenging effect of the extracts was compared with standard antioxidant vitamin C. The highest antioxidant activity was exhibited by the ethyl acetate extract of E. alba leaves. The result also showed that the DPPH scavenging activity of ethyl acetate extract from leaves of E. alba was high (EC50 = 419.38 μg/mL). However, this result was 18.99 times lower than that of vitamin C (EC50 = 22.08 μg/mL).

Synthesis, Characterization and Free Radical Scavenging Properties of Rosmarinic Acid Fatty Esters

2010 ◽  
Vol 87 (6) ◽  
pp. 615-620 ◽  
Author(s):  
Jérôme Lecomte ◽  
Luis Javier López Giraldo ◽  
Mickaël Laguerre ◽  
Bruno Baréa ◽  
Pierre Villeneuve
Keyword(s):  
Free Radical ◽  
Rosmarinic Acid ◽  
Radical Scavenging ◽  
Free Radical Scavenging ◽  
Fatty Esters ◽  
Radical Scavenging Properties

Possible Involvement of Free Radical Scavenging Properties in the Action of Tumor Necrosis Factor-α

1997 ◽  
Vol 22 (4) ◽  
pp. 679-687 ◽  
Author(s):  
Nagahide Matsubara ◽  
Midori Hiramatsu ◽  
Rei Edamatsu ◽  
Kiminao Mizukawa ◽  
Akitane Mori ◽  
...  
Keyword(s):  
Free Radical ◽  
Tumor Necrosis Factor ◽  
Tumor Necrosis ◽  
Tumor Necrosis Factor Α ◽  
Radical Scavenging ◽  
Free Radical Scavenging ◽  
Radical Scavenging Properties ◽  
Factor Α ◽  
Necrosis Factor
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