Research on the Antioxidation of Polyrhachis vicina Wine

2013 ◽  
Vol 781-784 ◽  
pp. 1689-1693
Author(s):  
Jing Xian Sun ◽  
Hai Ying Yang ◽  
Ping Zhou ◽  
Guang Qiu Zhang ◽  
Gang Du ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Free Radicals ◽  
Free Radical ◽  
Fenton Reaction ◽  
Superoxide Radical ◽  
Scavenging Effect ◽  
Hydroxyl Free Radical ◽  
Dpph Scavenging ◽  
Polyrhachis Vicina ◽  
Pyrogallol Autoxidation

The antioxidant activity of Polyrhachis vicina wine extract was investigated: The IC50 of scavenging effect on superoxide radical generated by Pyrogallol autoxidation was 0.37 mg/mL; the maximum scavenging rate was 81.4%. The IC50 of scavenging effect on hydroxyl free radical generated by Fenton reaction was 0.66 mg/mL; the maximum scavenging rate was 91.8%. The IC50 of DPPH· scavenging effect was 0.48 mg/mL; the maximum scavenging rate was 91.4%. The results indicated that Polyrhachis vicina wine extract showed activity both in scavenging free radicals and antioxidation.

Antioxidant Capacities of Water-Soluble Substances Extracted from JinHua Ham

2014 ◽  
Vol 675-677 ◽  
pp. 1654-1657
Author(s):  
Xiao Li Zhou ◽  
Xu Chen ◽  
Ting Feng Hao ◽  
Yi Ming Zhou ◽  
Ying Xiao
Keyword(s):  
Antioxidant Activity ◽  
Free Radical ◽  
Antioxidant Capacity ◽  
Mass Fraction ◽  
Water Soluble ◽  
Oxidation Capacity ◽  
Hydroxyl Free Radical ◽  
Antioxidant Capacities ◽  
Dpph Scavenging ◽  
Jinhua Ham

This study was designed to evaluate the antioxidant activity of samples extracted from Jinhua ham by using such chemical assays as DPPH, scavenging hydroxyl free radical and ABTS. The results demonstrate that antioxidant capacity of the extracted sample is lower than oxidation capacity of Vc. The IC50 spot of samples ranges between 0.6 % and 2.5 % (mass fraction of solute).

Discovery of New N-hydrazinecarbothioamide Indazole Hybrids: As Potential Radical (ABTS and DPPH) Scavengers

2020 ◽  
Vol 17 (9) ◽  
pp. 1177-1185
Author(s):  
Rafaila Rafique ◽  
Arshia ◽  
Kanwal ◽  
Khalid Mohammed Khan ◽  
Sridevi Chigurupati ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Ascorbic Acid ◽  
Free Radicals ◽  
Free Radical ◽  
Radical Scavenging ◽  
Free Radical Scavengers ◽  
Radical Scavengers ◽  
Synthetic Compounds ◽  
Free Radical Generation ◽  
Radical Generation

Background: Free radicals are the main cause of numerous diseases. Their overproduction needs to be controlled in order to combat several ailments. The current study deals with the discovery of new free radical scavengers. Methods: Substituted N-hydrazinecarbothioamide indazoles 1-18 were evaluated for DPPH and ABTS radical scavenging activities. Results: All synthetic compounds possess good radical DPPH and ABTS scavenging potential in the ranges of IC50 = 2.11 ± 0.17 - 5.3 ± 0.11 μM and IC50 = 2.31 ± 0.06 - 5.5 ± 0.07 μM, respectively, as compared to standard ascorbic acid having IC50 = 2.02 ± 0.11 μM for DPPH and IC50 = 2.1 ± 0.07 μM for ABTS. Conclusion: These compounds could serve as leads for antioxidant activity that have the ability to control free radical generation and ward off free radical-induced disorders.

Free radicals scavenging aptitude of Spilanthes acmella

2021 ◽  
pp. 2631-2634
Author(s):  
K. Gouri Sankar ◽  
B. S. Venkateswarlu
Keyword(s):  
Antioxidant Activity ◽  
Free Radicals ◽  
Free Radical ◽  
Radical Scavenging Activity ◽  
Radical Scavenging ◽  
Free Radical Scavenging ◽  
Free Radical Scavenging Activity ◽  
Bioactive Molecules ◽  
Scavenging Activity ◽  
Spilanthes Acmella

Now a days, oxidative stress is one of the major disease around the world. The excess production of oxidants in the body are key source for development of different chronic diseases and are leading to damage the multiple organs' function, finally to cellular mortality. The natural remedy is the most important medicine to control the overproduction of oxidants and to obtain more antioxidants. Natural product have been using to treat diseases and as food supplements as nutrients. In this point of view, the current study was carried to evaluate the antioxidant activity of Spilanthes acmella root parts. The free radical scavenging activity was studied against 2,2-diphenyl-1-picrylhydrazyl (DPPH), superoxide and hydroxyl free radicals using standard methods. The Spilanthes acmella root part extracts showed concentration dependent antioxidant activity on tested free radicals. The extracts showed modest effect on free radicals compared to the standard drug ascorbic acid and hydro-alcoholic extract possesses more activity than other two extracts. The end results of current study clearly state that Spilanthes acmella root possess free radical scavenging activity and also confirms its' traditional value in traditional medicine. The further research is worthful on isolation of different bioactive molecules and different biological activities evaluation on Spilanthes acmella.

scholarly journals FREE-RADICAL SCAVENGING ACTIVITY LEAF EXTRACT OF LITSEA LAEVIGATA GAMBLE

2019 ◽  
pp. 96-103
Author(s):  
S. SUJATHA ◽  
T. SEKAR
Keyword(s):  
Antioxidant Activity ◽  
Free Radical ◽  
Leaf Extract ◽  
Superoxide Radical ◽  
Radical Scavenging Activity ◽  
Radical Scavenging ◽  
Reducing Power ◽  
Scavenging Activity ◽  
Metal Chelating

Objective: In the present study, antioxidant activity in the leaf of the pet-ether, chloroform, acetone and methanolic extracts from Litsea laevigata Gamble. Leaf was investigated by employing established in vitro studies. L. laevigata belongs to the Lauraceae family. Methods: The capability of the plant extract to act as hydrogen/electrons donor or scavenger of radicals were determined by in vitro antioxidant assays using 2,2-diphenyl-2-picrylhydrazyl free radical (DPPH.) scavenging, reducing power assay, superoxide radical (O2*-) scavenging activity, phosphomolybdenum assay, FRAP, ABT and metal chelating activity were performed to know the antioxidant potency of the plant extract of leaves of L. laevigata. Results: Results are evaluated higher in leaf extract of L. laevigata recorded total phenol, total flavonoid, and tannin. The present state of work was designed to evaluate the phytochemical, antioxidant in the plant leaf extracts of L. laevigata. The plant L. laevigata methanolic extract of leaf showed greater IC50 antioxidant activity of DPPH assay (5.264 µg/ml) and compare to other extract, higher phosphomolybdenum reduction (164.36 mg/g), better Reducing power activity leaf in methanol (0.711%), higher ferric reducing power (4060.66MmolFe(II)E/mg), and higher in superoxide radical scavenging activity in (78.12 mg/ml). However, the better metal chelating ability was shown by the water extracts of the leaf (5.145 EDTAE/100g) compared to other solvent extracts. Conclusion: The result indicates the total phenol and antioxidant activity potential of L. laevigata.

scholarly journals Antioxidant activity of anthocyanins from quixabeira (Sideroxylon obtusifolium) fruits

2015 ◽  
Vol 17 (3) ◽  
pp. 473-479 ◽  
Author(s):  
F.J. FIGUEIREDO ◽  
V.L.A.G. LIMA
Keyword(s):  
Antioxidant Activity ◽  
Free Radical ◽  
Skin Color ◽  
Solid Phase ◽  
Radical Scavenging ◽  
Positive Control ◽  
Differential Method ◽  
Butylated Hydroxytoluene ◽  
Total Anthocyanins ◽  
Dpph Scavenging

ABSTRACT The fruits of Sideroxylon obtusifolium T.D. Penn. are small berries which have dark purple skin color at maturity due the anthocyanins presence. Therefore, the aim of this research was to evaluate the antioxidant activity of anthocyanins from mature fruits which were obtained at a semi-arid region of Paraiba/BR. In addition, the total anthocyanins content was measured by the pH differential method. The anthocyanins were purified by solid-phase extraction (SPE) using C18 Sep-Pak cartridges and submitted to antioxidant activity determined by scavenging 2,2-diphenyl-1-picrylhydrazyl (DPPH·). The butylated hydroxytoluene (BHT) was the positive control and the results were expressed as DPPH· scavenging activity (%). Anthocyanins content were higher in the husks (236.15 mg cyanidin-3-glucoside 100g-1 fw) than in the pulp (30.49 mg cyanidin-3-glucoside 100g-1 fw). The results showed that the potential free radical scavenging grew with the increase of concentration used and the reaction time. The ability of the anthocyanins in scavenging the free radical was statistically greater than the BHT one. The anthocyanins which were present in this fruit may supply substantial dietary source of antioxidant that may promote health and produce disease prevention effects or that could be applied in food industry as a good source of natural pigments

scholarly journals SKRINING FITOKIMIA DAN UJI AKTIVITAS ANTIOKSIDAN EKSTRAK ETANOLIK BUAH BUNI (Antidesma bunius (L.) SPRENG)

2016 ◽  
Vol 3 (2) ◽  
pp. 159-163
Author(s):  
Arif Rahman ◽  
Abd Malik ◽  
Aktsar Roskiana Ahmad
Keyword(s):  
Nitric Oxide ◽  
Antioxidant Activity ◽  
Free Radicals ◽  
Free Radical ◽  
Free Radical Scavengers ◽  
Bioactive Components ◽  
Ic50 Value ◽  
Ic50 Values ◽  
Dried Fruit ◽  
Ethanol Extracts

Free radicals play a role in the occurrence of various degenerative diseases that require free-radical scavengers or antioxidants. Buni fruit (Antidesma bunius (L.) Spreng) has the bioactive components are Anthocyanins (flavonoids) that serves to the free radicals. This study aimed to measure the antioxidant activity of theethanol extract contained 70% fruit Buni obtained by using the method of nitric oxide. Simplicia buni macerated dried fruit with 70% ethanol. Extracts were obtained in the test antioxidant activity against nitric oxide radicals. The antioxidant activity against free radical absorbance measured by means of UV-Vis spectrophotometry at a wavelength of 546 nm and calcul ated IC50 values. The results shows that the fruit buni has potential as a free radical with IC50 value of 2.28 µg/mL and a comparison of quercetin with IC50 value of 5.88 µg/mL.

scholarly journals Antioxidant Activity of the Extracts Derived from Terminalia catappa

2011 ◽  
Vol 54 (2) ◽  
pp. 93-98
Author(s):  
Rahmanullah Siddiqi ◽  
Syed Asad Sayeed ◽  
Shahina Naz ◽  
Syed Muhammad Ghufran Saeed
Keyword(s):  
Antioxidant Activity ◽  
Peroxide Value ◽  
Corn Oil ◽  
Ethanolic Extract ◽  
Phytochemical Analysis ◽  
Peroxide Formation ◽  
Aqueous Fraction ◽  
Scavenging Effect ◽  
Terminalia Catappa ◽  
Dpph Scavenging

The extracts derived from Terminalia catappa leaves and fruit following antioxidant activity directed isolation, were screened for their antioxidant activity through their ability to scavenge DPPH radicals. Only fractions which exhibited >50% DPPH scavenging effect at each step of isolation were selected for further purification and judge their ability to reduce peroxide formation (peroxide value) in heated corn oil. The results indicated that crude ethanolic extract, aqueous fraction of crude extract and its sub fractions (petroleum ether and ethylacetate) possessed prominent antioxidant activity. In addition, phytochemical analysis showed that the five fractions obtained finally contain simple phenols, anthocyanins, phenyl propanoids and flavanols.

Researches on the Structure and Antioxidant Activity of Apigenin-La (III) Complex

2013 ◽  
Vol 781-784 ◽  
pp. 1138-1143
Author(s):  
Feng Qiu Wen ◽  
Lang Sheng Pan ◽  
Lei Lei
Keyword(s):  
Thermal Analysis ◽  
Antioxidant Activity ◽  
Free Radicals ◽  
Superoxide Anion ◽  
Anion Radical ◽  
Superoxide Anion Radical ◽  
Scavenging Activity ◽  
Scavenging Effect ◽  
Pyrogallic Acid ◽  
Better Than

La (III) complex with apigenin was synthesized and characterized by UV, IR, 1HNMR and thermal analysis. The scavenging activity of the complex on superoxide anion radical (O2-·) and hdroxyl radical (·OH) was also investigated by improved pyrogallic acid way and ortho-oxybenzoic acid way. The results show that the complex had remarkable scavenging effects on O2-· and ·OH, and its scavenging effect on free radicals was better than apigenin.

scholarly journals Antioxidant potentials of polyphenolic extracts from leaves of trees and fruit bushes

2011 ◽  
Vol 34 (1) ◽  
pp. 15-21 ◽  
Author(s):  
Sylwia Cyboran ◽  
Dorota Bonarska-Kujawa ◽  
Ireneusz Kapusta ◽  
Jan Oszmiański ◽  
Halina Kleszczyńska
Keyword(s):  
Antioxidant Activity ◽  
Free Radicals ◽  
Free Radical ◽  
Phenolic Compounds ◽  
Membrane Lipids ◽  
Natural Antioxidants ◽  
Erythrocyte Ghosts ◽  
Quercetin Derivatives ◽  
Apple Leaves ◽  
High Antioxidant Activity

Antioxidant potentials of polyphenolic extracts from leaves of trees and fruit bushesThe 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. The studies performed have shown that the substances used protect membrane lipids against oxidation, clearly reducing the level of free radicals in erythrocyte ghosts suspension. The antioxidant activity of the substances studied follows the sequence: strawberry leaves > apple leaves > blackcurrant leaves. The results of the research on the antioxidant activity when confronted with the contents of polyphenols in the extracts indicates that the antioxidant potentials of the extracts depend both on the quantity and kind of individual polyphenols; in particular, on the kind and quantity of quercetin derivatives that constitute over 60 % of all the phenolic compounds. Moreover, the high antioxidant activity of the extracts may be also due to other, nonphenolic substances that occur in leaves. The extracts exhibit very good properties as free radical scavenges, and can thus be used as cheap, easily available, natural antioxidants in the industries where natural antioxidants in the form of fruit extracts have been used for long.

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