scholarly journals Promising Antioxidant and Anticorrosion Activities of Mild Steel in 1.0 M Hydrochloric Acid Solution by Withania frutescens L. Essential Oil

2021 ◽  
Vol 9 ◽  
Author(s):  
Abdelfattah El moussaoui ◽  
Mariya Kadiri ◽  
Mohammed Bourhia ◽  
Abdelkrim Agour ◽  
Ahmad Mohammad Salamatullah ◽  
...  
Keyword(s):  
Essential Oil ◽  
Mild Steel ◽  
Electrochemical Impedance ◽  
Antioxidant Activities ◽  
Polarization Curves ◽  
Antioxidant Power ◽  
Flame Ionization ◽  
Total Antioxidant ◽  
Ferric Reducing Antioxidant Power ◽  
Β Carotene

The present study was conducted to evaluate the anticorrosive and antioxidant activities of essential oil from Withania frutescens L. In the present study, the extraction of Withania frutescens L. essential oil (Wf-EO) was conducted using hydrodistillation before being characterized by gas chromatographic analysis (GC/MS) and flame ionization detector (GC/FID). Four bioassays were used for antioxidant testing including 2,2-diphenyl-1-picrylhydrazyl (DPPH), total antioxidant capacity (TAC), ferric reducing antioxidant power (FRAP), and β-carotene bleaching. The inhibiting effect of Wf-EO on the corrosion behavior of mild steel in 1.0 M HCl was conducted by using polarization curves and electrochemical impedance spectroscopy techniques. The yield of Wf-EO was 0.46% including 175 compounds identified by GC-MS. The oil was mostly constituted of camphor (37.86%), followed by thujone (26.47%), carvacrol (6.84%), eucalyptol (3.18%), and linalool (2.20%). The anti–free radical activity of Wf-EO was 34.41 ± 0.91 μg/ml (DPPH), 9.67 ± 0.15 mg/ml (FRAP), 3.78 ± 0.41 mg AAE/g (TAC), and 89.94 ± 1.44% (β-carotene). The Wf-EO showed potent antioxidant activity in all bioassays used for testing. The anticorrosion activity, polarization curves as well as EIS diagrams indicated that the Wf-EO exhibited anticorrosive properties and reacted as a suitable corrosion inhibitor in an acidic medium.

scholarly journals Radical Scavenging and Antioxidant Activities of Essential Oil Components – An Experimental and Computational Investigation

2015 ◽  
Vol 10 (1) ◽  
pp. 1934578X1501000 ◽  
Author(s):  
Farukh S. Sharopov ◽  
Michael Wink ◽  
William N. Setzer
Keyword(s):  
Essential Oil ◽  
Electronic Properties ◽  
Antioxidant Activities ◽  
Radical Scavenging ◽  
Dpph Radical ◽  
Frap Assay ◽  
Antioxidant Power ◽  
Ferric Reducing Antioxidant Power ◽  
Oil Components ◽  
Dpph Radical Scavenging

The antioxidant activities of eighteen different essential oil components have been determined using the 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical-scavenging assay, the 2,2 ’-azino-bis(3-ethylbenzothiazoline-6-sulphonic acid (ABTS) radical cation assay, and the ferric reducing antioxidant power (FRAP) assay. The phenolic compounds, carvacrol, thymol, and eugenol, showed the best antioxidant activities, while camphor, menthol, and menthone were the least active. The structural and electronic properties of the essential oil components were assessed using density functional theory (DFT) at the B3LYP/6-311++G** level. Correlations between calculated electronic properties and antioxidant activities were generally poor, but bond-dissociation energies (BDEs) seem to correlate with DPPH radical-scavenging activities, and the ferric reducing antioxidant power (FRAP) assay correlated with vertical ionization potentials calculated at the Hartree-Fock/6-311++G** level.

scholarly journals Lawsonia inermis essential oil: extraction optimization by RSM, antioxidant activity, lipid peroxydation and antiproliferative effects

2019 ◽  
Vol 18 (1) ◽  
Author(s):  
Asma Elaguel ◽  
Imen Kallel ◽  
Bochra Gargouri ◽  
Ichrak Ben Amor ◽  
Bilel Hadrich ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Chemical Composition ◽  
Essential Oil ◽  
Antioxidant Activities ◽  
Oil Extraction ◽  
Chemical System ◽  
Lawsonia Inermis ◽  
Antioxidant Power ◽  
Antiproliferative Effects ◽  
Total Antioxidant

Abstract Background The present study was focused on the optimization of yield of the essential oil extraction from leaves of Lawsonia inermis, and the determination of chemical composition, antioxidant activities, and lipid peroxydation and antiproliferative effects. Methods Henna essential oil (HeEO) were extracted by hydrodistillation; the identification of the chemical composition were done by GC/MS method. HeEO was analyzed for antioxidant power in: (1) chemical system by the DPPH test, the ABTS test and the total antioxidant activity test; and (2) in biological system by lipid peroxydation tests (MDA and DC) in cells culture. The cytotoxicity effects of HeEO were assessed using MTT assay against Raji and HeLa cell lines. Results The optimal extraction yield was 6.8 g/100 g d.b. HeEO showed a remarkable anti-oxidant activities including DDPH (42%), ABTS (87%) and the power of ammonium phosphomolybdate (2992 ± 230 mg of HeEO by equivalent to 1 mg of vitamin C in terms of total antioxidant power). Conclusion Beyond notable antioxidant activities of the HeEo, our results showed a significant decrease in the production of ERO in the Raji cell line. The anti-tumor power of the Henna essential oil shows an interesting cytotoxicity effect (IC50 at 0.26 μg/mL for Raji and at 1.43 μg/mL for HeLa) with a total mortality percentage reaching 60%, for both.

scholarly journals Effect of fertilization and harvesting time on antioxidant activity of three leafy vegetables commonly used in Benin

2013 ◽  
Vol 13 (60) ◽  
pp. 8293-8312
Author(s):  
CNA Sossa-Vihotogbé ◽  
◽  
NH Akissoe ◽  
VB Anihouvi ◽  
BC Ahohuendo ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Antioxidant Activities ◽  
Leafy Vegetables ◽  
Organic Fertilizers ◽  
Total Phenolic ◽  
Antioxidant Power ◽  
Harvesting Time ◽  
Total Antioxidant ◽  
Ferric Reducing Antioxidant Power

Leafy vegetables are an excellent source of bioactive factors, traditionally used as important medical ingredients. Recently, some leafy vegetables are domesticated without the use of fertilizer, as well as the assessment of the effect of fertilizer on their nutritional value. This study aims at testing the effect of three mineral and organic fertilizers (Cowpat, NPK and NPK + cowpat) on three traditional leafy vegetables: Ceratotheca sesamoïdes, Sesamum radiatum and Justicia tenella. Their antioxidant activities were assessed at different harvesting times varying from six (6) to fourteen (14) Weeks After Transplantation (WAT) using three in vitro methods: Ferric reducing antioxidant power (FRAP), 2,2’-Azinobis3-ethylbenzothiazoline-6- sulfonic acid (ABTS) and 2,2-diphenyl-1-picryl hydrazil (DPPH). The FRAP, DPPH, ABTS assays were consistent and positively correlated (p < 0.001). Total antioxidant activities of leafy vegetables depended on species, harvesting time and methods. They ranged from 32.0 to 45.7 µmol Fe/g DW (for FRAP), with non fertilized J. tenella cut at 12 WAT giving the highest antioxidant activity. Percentage of inhibition using DPPH assay ranged from 11.4 to 87.2 % and showed that J. tenella fertilized with NPK and cowpat, and harvested at 9 WAT had the highest antioxidant activity. Regarding ABTS, the range of 17.6 to 28.9 µmol TE/g DW was recorded, and the leaves of C. sesamoïdes harvested at 10 WAT and fertilized with cowpat showed the highest level. Compared to other species, those studied here may best contribute to improve human health related to degenerative diseases. Moreover, significant and positive correlations were observed between the total phenolic compounds content and antioxidant activities of leaves regardless the methods used. The positive and significant correlations between the three assays (FRAP, DPPH, ABTS) allow to suggest the use of only anyone of them to check factors in the study. This paper highlights the potential of antioxidant capability of the leafy vegetables even fertilized.

scholarly journals Enzyme Inhibitory Properties, Antioxidant Activities, and Phytochemical Profile of Three Medicinal Plants from Turkey

2015 ◽  
Vol 2015 ◽  
pp. 1-8 ◽  
Author(s):  
Gokhan Zengin ◽  
Gokalp Ozmen Guler ◽  
Abdurrahman Aktumsek ◽  
Ramazan Ceylan ◽  
Carene Marie Nancy Picot ◽  
...  
Keyword(s):  
Medicinal Plants ◽  
Antioxidant Capacity ◽  
Antioxidant Activities ◽  
Ferrous Ions ◽  
Antioxidant Power ◽  
Key Enzymes ◽  
Total Antioxidant ◽  
Ferric Reducing Antioxidant Power ◽  
Inhibitory Potential

We aimed to investigate the inhibitory potential of three medicinal plants (Hedysarum varium,Onobrychis hypargyrea, andVicia truncatula) from Turkey against key enzymes involved in human pathologies, namely, diabetes (α-amylase andα-glucosidase), neurodegenerative disorders (tyrosinase, acetylcholinesterase, and butyrylcholinesterase), and hyperpigmentation (tyrosinase). The antioxidant potential, phenolic and flavonoid content of ethyl acetate, and methanolic and aqueous extracts were investigated usingin vitroassays. The total antioxidant capacity (TAC),β-carotene/linoleic acid bleaching activity, 1,1-diphenyl-2-picrylhydrazyl free radical (DPPH•), 2,2-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS•+), cupric ion reducing antioxidant capacity (CUPRAC), ferric reducing antioxidant power (FRAP), and metal chelating activity on ferrous ions were used to evaluate the antioxidant capabilities of the extracts. The half-maximal inhibitory concentrations (IC50) of the extracts on cholinesterase, tyrosinase, andα-amylase were significantly higher than the references, galantamine, kojic acid, and acarbose, respectively. The half-maximal effective concentrations (EC50) of the extracts on TAC, CUPRAC, and FRAP were significantly higher than trolox. The phenol and flavonoid contents of the plant extracts were in the range20.90±0.190–83.25±0.914 mg gallic acid equivalent/g extract and1.45±0.200–39.71±0.092 mg rutin equivalent/g extract, respectively. The plants were found to possess moderate antioxidant capacities and interesting inhibitory action against key enzymes.

scholarly journals Antioxidant Capacities of Peel, Pulp, and Seed Fractions ofCanarium odontophyllumMiq. Fruit

2010 ◽  
Vol 2010 ◽  
pp. 1-8 ◽  
Author(s):  
K. Nagendra Prasad ◽  
Lye Yee Chew ◽  
Hock Eng Khoo ◽  
Kin Weng Kong ◽  
Azrina Azlan ◽  
...  
Keyword(s):  
Antioxidant Activities ◽  
Natural Antioxidants ◽  
Total Phenolic ◽  
Antioxidant Power ◽  
Hemoglobin Oxidation ◽  
Antioxidant Capacities ◽  
Total Antioxidant ◽  
Ferric Reducing Antioxidant Power ◽  
Canarium Odontophyllum

Antioxidant capacities of ethylacetate, butanol, and water fractions of peel, pulp, and seeds ofCanarium odontophyllumMiq. (CO) were determined using variousin vitroantioxidant models. Ethylacetate fraction of peel (EAFPE) exhibited the highest total phenolic (TPC), total flavonoid content (TFC), and antioxidant activities compared to pulp, seeds, and other solvent fractions. Antioxidant capacities were assayed by total antioxidant capability, 1,1-diphenyl-2-picryl hydrazyl (DPPH) radical activity, ferric reducing antioxidant power (FRAP), and hemoglobin oxidation assay. Total phenolic content of ethylacetate fractions was positively correlated with the antioxidant activity. This is the first report on the antioxidant activities from CO fruit fractions. Thus, EAFPE can be used potentially as a readily accessible source of natural antioxidants and as a possible pharmaceutical supplement.

scholarly journals Total polyphenolic compounds contents (TPC), total antioxidant activities (TAA) and HPLC determination of individual polyphenolic compounds in selected Moravian and Austrian wines

2011 ◽  
Vol 9 (4) ◽  
pp. 677-687 ◽  
Author(s):  
Badamtsetseg Soyollkham ◽  
Pavel Valášek ◽  
Miroslav Fišera ◽  
Vlastimil Fic ◽  
Vlastimil Kubáň ◽  
...  
Keyword(s):  
Phenolic Content ◽  
Antioxidant Activities ◽  
Polyphenolic Compounds ◽  
Total Phenolic ◽  
Total Antioxidant Activity ◽  
Antioxidant Power ◽  
Geographical Regions ◽  
Total Antioxidant ◽  
Ferric Reducing Antioxidant Power

AbstractWine samples (Grüner Veltliner (GV) and Zweigelt (ZW) from four different geographical regions of Austria and Czech Republic) were analyzed to determine their total phenolic content (TPC) by applying the Folin-Ciocalteau method, total antioxidant activity (TAA) by FRAP (ferric reducing antioxidant power) and DPPH (1,1-diphenyl-2-picryl-hydrazyl) assays, and to identify and quantify eleven phenolic compounds using a HPLC/UV-VIS method.

scholarly journals Chromatography Analysis of Fatty Acids, Volatile Compounds and Alkaloids of Ephedra alata Growing Wild in Southern Tunisia and Evaluation of their Antioxidant Activity

2017 ◽  
Vol 9 (09) ◽  
Author(s):  
Mighri H. ◽  
Bennour N. ◽  
Eljeni H. ◽  
Neffati M. ◽  
Akrou T.
Keyword(s):  
Fatty Acids ◽  
Volatile Compounds ◽  
Antioxidant Activities ◽  
Plant Materials ◽  
Antioxidant Power ◽  
Medicinal Uses ◽  
Chromatography Analysis ◽  
Total Antioxidant ◽  
Ferric Reducing Antioxidant Power ◽  
Hexane Extracts

In order to provide more information about phytochemical composition of Tunisian Ephedra alata known for their medicinal uses, fatty acids, volatile compounds and alkaloids have been analyzed in fresh or dry plant materials whether powdered or not. Extraction was performed with hexane and ethanol in soxhlet extractor and all extracts were analyzed by GC-MS. Phosphomolybdenum, DPPH and FRAP methods were used to evaluate their antioxidant activities. The dry matter present a more diversified fatty acids composition dominated by palmitic acid, oleic acid and linolelaidic acid. Hydrocarbons represent the largest group of volatile compounds, followed by alcohols. The most known detected ephedrine-type alkaloid characteristic of the Ephedra genus are dominated by pseudoephedrine, norephedrine, ethylephedrine. Some other compounds are mentioned for the first time in E. alata alkaloids such as azetidine, 1,2- dimethyl-3-phenylaziridine, N-ethyl benzamide and N-methyl-mandelamide. Lower total antioxidant and anti-radicular effects were shown with hexane extracts and alkaloid fractions instead the ferric reducing antioxidant power test showed the highest results with obtained alkaloid from powdered fresh and dry plant materials. Lipids, volatile compounds and alkaloids in E. alata that have been assessed could provide possible roles in case of human breast cancer and health benefits and therefore a research on this plant might be of value in drug industry.

scholarly journals Phytochemicals, Antioxidant and Antidiabetic Activities of Extracts from Miliusa velutina Flowers

Horticulturae ◽  
2021 ◽  
Vol 7 (12) ◽  
pp. 555
Author(s):  
Vo Thi Tu Anh ◽  
Dai Thi Xuan Trang ◽  
Kaeko Kamei ◽  
Tran Chi Linh ◽  
Nguyen Huan Pham-Khanh ◽  
...  
Keyword(s):  
Aqueous Extract ◽  
Crude Extract ◽  
Antioxidant Activities ◽  
Reducing Power ◽  
Inhibitory Effect ◽  
Chemical Components ◽  
Antioxidant Power ◽  
Total Antioxidant ◽  
Ferric Reducing Antioxidant Power ◽  
Reducing Power Assay

The flowers of M. velutina were extracted with ethanol to obtain a crude extract that was consecutively extracted using n-hexane, dichloromethane, ethyl acetate and water. The crude extract and fractions were studied for the chemical composition and antioxidant and antidiabetic activities. The extracts had various phytoconstituents, namely steroids, flavonoids, tannins, saponins, alkaloids and glycosides. The aqueous extract had the highest total polyphenol (12.6 mg GAE/g extract) and total flavonoid (205.6 mg QE/g extract) content. The aqueous extract exhibited the strongest antioxidant activities in the ferric reducing antioxidant power assay (EC50 = 4.0 µg/mL), reducing power assay (EC50 = 78.1 µg/mL), 2,2-azino-bis-3-ethylbenzothiazoline-6-sulphonic acid radical cation assay (EC50 = 48.2 µg/mL), total antioxidant capacity assay (EC50 = 8.7 µg/mL) and 1,1-diphenyl-2-picrylhydrazyl assay (EC50 = 9.3 µg/mL). The aqueous extract showed the strongest inhibitory effect on the activity of α-amylase (IC50 = 376.6 μg/mL) and α-glucosidase (IC50 = 69.7 μg/mL). The results showed that the aqueous extract of M. velutina flowers can be a promising candidate for the control of diabetes and oxidative stress. This is the first report about the chemical components and antioxidant and antidiabetic activities of M. velutina flower extracts.

Biological Activities of Carlina Oxide Isolated from the Roots of Carthamus caeruleus

2020 ◽  
Vol 10 (2) ◽  
pp. 145-152 ◽  
Author(s):  
Imane Rihab Mami ◽  
Rania Belabbes ◽  
Mohammed El Amine Dib ◽  
Boufeldja Tabti ◽  
Jean Costa ◽  
...  
Keyword(s):  
Antifungal Activity ◽  
Essential Oil ◽  
Skin Diseases ◽  
Antioxidant Activities ◽  
Biological Activities ◽  
Radical Scavenging Activity ◽  
Radical Scavenging ◽  
Penicillium Expansum ◽  
Natural Food ◽  
Antioxidant Power

Background: Carthamus caeruleus belongs to the Asteraceae family. The roots are traditionally used as healing agents. They help to heal burns and treat skin diseases. They are also used against joint inflammation and are very effective against diseases such as irritable bowel syndrome for cancer patients. Objectives: The purpose of this work was i) to study the chemical composition of i) the essential oil and hydrosol extract of Carthamus caeruleus, ii) to isolate the major component of both extracts and iii) to evaluate their antioxidant, antifungal and insecticidal activities. Methods: The essential oil and hydrosol extract obtained from the roots were studied by GC and GC/MS. The antioxidant activities were performed using two different methods i) Radical scavenging activity (DPPH) and ii) the Ferric-Reducing Antioxidant Power (FRAP), using BHT as a positive control. Whereas, the antifungal activity of the essential oil and Carlina oxide was investigated against plant fungi. The fumigation toxicity of C. caeruleus essential oil besides Carlina oxide was evaluated against adults of Bactrocera oleae better known as the olive fly. Results: The essential oil and hydrosol extract were mainly represented by acetylenic compounds such as carline oxide and 13-methoxy carline oxide. Carlina oxide was isolated and identified by 1H and 13C NMR spectroscopic means. The results showed that Carlina oxide presented interesting antioxidant and antifungal properties, while C. caeruleus root essential oil had better insecticidal activity. Furthermore, Carlina oxide has demonstrated promising in vivo antifungal activity to control infection of apples by Penicillium expansum. Conclusion: Carlina oxide can be used as a natural food preservative and alternative to chemical fungicides to protect stored apple against Penicillium expansum.

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