scholarly journals A Comparative Study of the Radical-scavenging Activity of the Phenolcarboxylic Acids Caffeic Acid, p-Coumaric Acid, Chlorogenic Acid and Ferulic Acid, With or Without 2-Mercaptoethanol, a Thiol, Using the Induction Period Method

Molecules ◽  
2008 ◽  
Vol 13 (10) ◽  
pp. 2488-2499 ◽  
Author(s):  
Yoshinori Kadoma ◽  
Seiichiro Fujisawa
Keyword(s):  
Comparative Study ◽  
Ferulic Acid ◽  
Chlorogenic Acid ◽  
Induction Period ◽  
Caffeic Acid ◽  
Radical Scavenging Activity ◽  
Radical Scavenging ◽  
Scavenging Activity ◽  
Coumaric Acid ◽  
Phenolcarboxylic Acids

scholarly journals Evaluation antioxidant activity and corrosion inhibition of C38 in Hydrochloric acid medium by dried lemon peels of Kenitra Marrakech cities in Morocco and Taiz town in Yemen: A Comparative study

2021 ◽  
Vol 119 ◽  
pp. 04001
Author(s):  
Khaled Abdu ◽  
Rahma Erahioui ◽  
Khadija Khedid ◽  
Hefdhal deen ◽  
Maha Elhawary ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Comparative Study ◽  
Corrosion Inhibition ◽  
Radical Scavenging Activity ◽  
Radical Scavenging ◽  
Ethanolic Extract ◽  
Ethanol Extract ◽  
Fatty Tissue ◽  
Scavenging Activity ◽  
Ic50 Values

This paper presents a comparative study about the evaluation of antioxidant activity and corrosion inhibition in Kenitra, Marrakesh and Taiz. An interesting topic, indeed polyphenols can improve or help to reduce oxidative stress in the treatment of digestive problems, weight management difficulties, diabetes, hypertension, arteriosclerosis and damage fatty tissue. Therefore, the authors deal with the measurement of polyphenol content and evaluation of the antioxidant activity of lemon peels in Kenitra , Marrakesh and Taiz.The authors performs empirical analyzes on lemon peels. The total polyphenol contents of the ethanolic extract of lemon peels were measured. It was to be 30. 23, 26. 346 and 20.961 mg/CE/g in Kenitra, Marrakech, and Taiz, respectively. Moreover, the DPPH radical scavenging activity of ethanolic extract of dried lemon peels was higher than 200μg/ml concentration. They were 73.47%, 47.36%, and 32.09in Kenitra, Marrakech, and Taiz, respectively. Also, the IC50 values of ethanolic extracts calculated from the percentage inhibitions at the same concentration. Inhibition (IC50) which obtained in Kenitra was 123.089 μg/ml. It was lower compared to the ethanol extract of Marrakech and Taiz that were 197.418, 276.750μg/mL, respectively. Therefore, the extract which is containing a high amount of phenolic is showed high radical scavenging activity. In addition, the maximum inhibition efficiencies for 2 mL L-1 of the inhibitor at 298 k were 98, 12% and 84, 85 % in Kenitra and Taiz, respectively. These values obtained through polarization curve measurements.

Antioxidant properties, radical scavenging activity and biomolecule protection capacity of flavonoid naringenin and its glycoside naringin: a comparative study

2010 ◽  
Vol 90 (7) ◽  
pp. 1238-1244 ◽  
Author(s):  
Monica Cavia-Saiz ◽  
Maria D Busto ◽  
Maria Concepción Pilar-Izquierdo ◽  
Natividad Ortega ◽  
Manuel Perez-Mateos ◽  
...  
Keyword(s):  
Comparative Study ◽  
Radical Scavenging Activity ◽  
Antioxidant Properties ◽  
Radical Scavenging ◽  
Scavenging Activity

scholarly journals Kinetic behaviour of DPPH radical scavenging activity of tomato waste extracts

2012 ◽  
Vol 77 (10) ◽  
pp. 1381-1389 ◽  
Author(s):  
Sladjana Savatovic ◽  
Gordana Cetkovic ◽  
Jasna Canadanovic-Brunet ◽  
Sonja Djilas
Keyword(s):  
Steady State ◽  
Caffeic Acid ◽  
Radical Scavenging Activity ◽  
Radical Scavenging ◽  
Antioxidant Compounds ◽  
Scavenging Activity ◽  
Kinetic Behaviour ◽  
Tomato Waste ◽  
Dpph Radical Scavenging ◽  
Slow Kinetic

The kinetic behaviour of tomato waste extracts (obtained from six genotypes) and standard antioxidant compounds (ascorbic and caffeic acid) were investigated using 2,2-diphenyl-1-picrylhydrazyl radical test. Based on the time needed for the reaction to reach steady state, the investigated extracts show very slow (steady state ? 180 min) antiradical behaviour, ascorbic acid act as rapid antioxidant (steady state < 5min) while caffeic acid is rapidintermediate antioxidant (5 min < steady state < 20 min). The efficient concentrations at different kinetic times EC50,t were determined for all extracts, ascorbic and caffeic acid. EC50,t was used as a parameter to screen and compare antiradical activities of food extracts with slow kinetic action. Irrespective of the time considered, the comparison of the EC50,t for extracts showed that the DPPH radicals scavenging activity of extracts decreased in the order of O2 > Knjaz > Backa > Saint Pierre > Rutgers > Novosadski niski. Tomato waste extracts showed very slow kinetic action, which is probably result of the different kinetic bevaviour of phenolic compounds, present in tomato waste, as well as other antioxidants (vitamins, carotenoids etc).

scholarly journals Anti-malarial Activity Of Phenolic Acids Is Structurally Related

2020 ◽  
Author(s):  
Prince A Fordjour ◽  
Jonathan P Adjimani ◽  
Bright Asare ◽  
Nancy O Duah-Quashie ◽  
Neils B Quashie
Keyword(s):  
Plasmodium Falciparum ◽  
Ferulic Acid ◽  
Chlorogenic Acid ◽  
Gallic Acid ◽  
Caffeic Acid ◽  
Phenolic Acids ◽  
Rosmarinic Acid ◽  
Protocatechuic Acid ◽  
Antimalarial Activity ◽  
Coumaric Acid

Abstract Background In the absence of an effective vaccine against malaria, chemotherapy remains a major option in the control of the disease. Then, the recent report of the emergence and spread of clones of Plasmodium falciparum resistant to available antimalarial drugs should be of concern as it poses a threat to disease control. Compounds whose pharmacological properties have been determined and touted for other disease can be investigated for antimalarial activity. Phenolic acids (polyphenols) have been reported to exhibit antioxidant, anticancer, anti-inflammatory, antiviral and antibiotic effects. However, information on their antimalarial activity is scanty. Phenolic acids are present in a variety of plant-based foods: mostly high in the skins and seeds of fruits as well as the leaves of vegetables. Systematic assessment of these compounds for antimalarial activity is therefore needed. Method Using the classical in vitro drug test, the antimalarial activities of five hydroxycinnamic acids, (caffeic acid, rosmarinic acid, chlorogenic acid, o-Coumaric acid and ferulic acid) and two hydroxybenzoic acids (gallic acid and protocatechuic acid) against 3D7 clones of Plasmodium falciparum was determined. Results Among the phenolic acids tested, caffeic acid and gallic acid were found to be the most effective, with mean IC 50 value of 17.73µg/ml and 26.59µg/ml respectively for three independent determinations. Protocatechuic acid had an IC 50 value of 30.08 µg/ml. Rosmarinic acid and chlorogenic acid, showed moderate antimalarial activities with IC 50 values of 103.59µg/ml and 105µg/ml respectively. The IC 50 values determined for ferulic acid and o-Coumaric acid were 93.36µg/ml and 82.23µg/ml respectively. Conclusion The outcome of this study suggest that natural occurring phenolic compounds have appreciable level of antimalarial activity which can be exploited for use through combination of actions/efforts including structural manipulation to attain an increase in their antimalarial effect. Eating of natural food products rich in these compounds could provide antimalarial prophylactic effect.

Comparative Study on the Total Phenolic Content and Radical Scavenging Activity of Common Edible Vegetable Oils

2013 ◽  
Vol 38 (1) ◽  
pp. 38-49 ◽  
Author(s):  
Chandran Janu ◽  
D.R. Soban Kumar ◽  
M.V. Reshma ◽  
P. Jayamurthy ◽  
A. Sundaresan ◽  
...  
Keyword(s):  
Comparative Study ◽  
Vegetable Oils ◽  
Total Phenolic Content ◽  
Phenolic Content ◽  
Radical Scavenging Activity ◽  
Radical Scavenging ◽  
Total Phenolic ◽  
Scavenging Activity

scholarly journals Bagged Aronia Melanocarpa Tea: Phenolic Profileand Antioxidant Activity / Aronia Melanocarpa Filter Čaj: Fenolni Profil I Antioksidativna Aktivnost

2014 ◽  
Vol 31 (4) ◽  
pp. 245-252 ◽  
Author(s):  
Jovana Veljković ◽  
Jelena Brcanović ◽  
Aleksandra Pavlović ◽  
Snežana Mitić ◽  
Biljana Kaličanin ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Caffeic Acid ◽  
Antioxidant Activities ◽  
Biological Activities ◽  
Radical Scavenging Activity ◽  
Radical Scavenging ◽  
Scavenging Activity ◽  
Antioxidant Power ◽  
Aronia Melanocarpa ◽  
Tea Infusions

Summary While there is a large number of scientific papers reporting chemical composition and biological activities of Aronia melanocarpa, there is a lack information regarding the commercially available bagged tea. In order to supply new information on the antioxidant activity of the Aronia melanocarpa tea infusions, the aim of this study was to evaluate individual phenolic compounds which could be responsible for antioxidant activities of these beverages. Selected anthocyanins (cyanidin-3-O-galactoside, cyanidin-3-O-glucoside, cyanidin- 3-O-arabinoside, and cyanidin-3-O-xyloside), gallic acid, caffeic acid, rutin, morin, and protocatechuic acid were simultaneously detected from commercially available tea infusions using a High Performance Liquid Chromatographic (HPLC) method. The antioxidant activity was measured using five in vitro spectrophotometric methods: 1,1-diphenyl- 2-picrylhydrazyl radical scavenging activity (DPPH), 2,2'-azino-bis (3-ethylbenzthiazoline- 6-sulphonic acid) radical cation scavenging activity (ABTS), ferric reducing-antioxidant power (FRAP) and reduction power (RP)Fe(III) to Fe(II). Obtained results showed that anthocyanins, predominantly of cyanidin-3-O-galactoside, are the major class of polyphenolic compounds in tea infusions. Among phenolic acids the most abundant is caffeic acid. A significant correlation between DPPH and ABTS and FRAP and RP suggested that antioxidant components in these beverages were capable scavenging free radicals and reducing oxidants. Generally, these beverages had relatively high antioxidant capacities and could be important dietary sources of antioxidant phenolics for the prevention of diseases caused by oxidative stress.

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