Results 1 to 10 of about 183,764 (146)

Phenolic compound profiles and antioxidant activity of Ruta chalepensis L. leaves, a spontaneous medicinal herb: influence of harvest zone (Western Algeria) [PDF]

International Journal of Minor Fruits, Medicinal and Aromatic Plants, 2021
Natural plant extracts contain a variety of phenolic compounds, to which various biological activities are attributed. Ruta chalepensis, known as "Fidjel", is widespread in the Algerian territory, which was selected in order to estimate its content of ...
EL-Kadi Fatima Zohra
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Antioxidant Activity of Watermelon Seeds Determined by DPPH Assay [PDF]

Kemija u Industriji, 2022
The purpose of this study was to assess the antioxidant activity of the fresh extracts of Croatian and Greek watermelon seeds. Samples were prepared using two extraction methods: Soxhlet and maceration.
Mirsada Salihović, Mirha Pazalja, Atifa Ajanović   +2 more
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Water-Induced Regeneration of a 2,2-Diphenyl-1-picrylhydrazyl Radical after Its Scandium Ion-Promoted Electron-Transfer Disproportionation in an Aprotic Medium

Molecules, 2023
A neutral, stable radical, 2,2-diphenyl-1-picrylhydrazyl radical (DPPH•), has been frequently used to estimate the activity of antioxidants for more than 60 years.
Ikuo Nakanishi, Yoshimi Shoji, Kei Ohkubo, Hiromu Ito, Shunichi Fukuzumi   +4 more
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A kinetic-based stopped-flow DPPH• method

Scientific Reports, 2023
The reaction kinetics of antioxidants with free radicals is crucial to screen their functionality. However, studying antioxidant-radical interactions is very challenging for fast electron-donor substances, such as ascorbic acid, because the reaction ends
Lucrezia Angeli, Ksenia Morozova, Matteo Scampicchio   +2 more
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Optimising the DPPH Assay for Cell-Free Marine Microorganism Supernatants

Marine Drugs, 2021
Antioxidants prevent ageing and are usually quantified and screened using the 1,1-diphenyl-2-picrylhydrazyl (DPPH) assay. However, this assay cannot be used for salt-containing samples, such as the cell-free supernatants of marine microorganisms that are
Yehui Gang, Tae-Yang Eom, Svini Dileepa Marasinghe, Youngdeuk Lee, Eunyoung Jo, Chulhong Oh   +5 more
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A novel electrochemical micro-titration method for quantitative evaluation of the DPPH free radical scavenging capacity of caffeic acid

Open Chemistry, 2023
In this report, the stoichiometric ratio (R) for the interaction of diphenylpicrylhydrazyl (DPPH) radicals with the antioxidant was employed as an evaluation index for the DPPH radical scavenging activity of antioxidants.
Li Xiaofen, Yang Zhi, Gao Yuntao, Xiong Huabin   +3 more
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Electrochemical redox behavior of 2,2-diphenyl-1-picrylhydrazyl radical solubilized by β-cyclodextrin in water

Electrochemistry Communications, 2022
2,2-Diphenyl-1-picrylhydrazyl radical (DPPH•) is a water-insoluble stable radical that has been used to evaluate the activity of antioxidants as a reactivity model of reactive oxygen species.
Ikuo Nakanishi, Yoshimi Shoji
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The [DPPH●/DPPH-H]-HPLC-DAD Method on Tracking the Antioxidant Activity of Pure Antioxidants and Goutweed (Aegopodium podagraria L.) Hydroalcoholic Extracts

Molecules, 2020
The 2,2-diphenyl-1-picrylhydrazyl (DPPH)-reverse phase (RP)-HPLC-diode array detector (DAD) method was tested on standard antioxidants (AOs), i.e., reduced glutathione (GSH), ascorbic acid (vitamin C), and alcoholic extracts of A. podagraria L.
Jolanta Flieger, Michał Flieger
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Antioxidant activity of white grape seed extracts on DPPH radicals [PDF]

Acta Periodica Technologica, 2009
Composition and antioxidant activity of grape seed extract (GSE) obtained from red grape varietes are very well documented, in contrast to the white varietes. This paper presents the results of polyphenols content of ethyl acetate extract of grape seeds,
Ćetković Gordana S., Čanadanović-Brunet Jasna M., Đilas Sonja M., Mandić Anamarija I., Vulić Jelena J.   +4 more
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Chemical Composition and in Vitro Evaluation of the Antioxidant and Antimicrobial Activities of Eucalyptus gillii Essential Oil and Extracts [PDF]

, 2012
In this study, essential oil and various extracts (hexane, petroleum ether, acetone, ethanol, methanol and water) of Eucalyptus gilii were screened for their chemical composition, antimicrobial and antioxidant activities.
Ahmed Lebrihi, Arvouet-Grand, Brooke, Cheng, Damjanovic-Vratnica, Dorsaf Ben Hassine, Florence Mathieu, Folin, François Couderc, Giamakis, Jaimand, Jalloul Bouajila, Manef Abderrabba, Naczk, Pittman, Rahman, Sikkema, Singab, Sonboli, Ultee, Yan Yvon   +20 more
core   +5 more sources