Results 11 to 20 of about 161,711 (240)

Can aluminum, a non-redox metal, alter the thermodynamics of key biological redox processes? The DPPH-QH 2 radical scavenging reaction as a test case. [PDF]

open access: yes, 2021
The increased bioavailability of aluminum has led to a concern about its toxicity on living systems. Among the most important toxic effects, it has been proven that aluminum increases oxidative stress in biological systems, a controversial fact, however,
Jose , Lanuza   +2 more
core   +2 more sources

DPPH Radical Scavenging Assay

open access: yes, 2023
Today, there is an increasing interest in antioxidants, especially to prevent the known harmful effects of free radicals in human metabolism and their deterioration during processing and storage of fatty foods.
Alwasel, Saleh H.   +3 more
core   +1 more source

Jenis Pelarut Metanol Dan N-Heksana Terhadap Aktivitas Antioksidan Ekstrak Rumput Laut Gelidium sp. Dari Pantai Drini Gunungkidul – Yogyakarta [PDF]

open access: yes, 2018
Gelidium sp. the one of red seaweed which has potential as naturalantioxidant. The researh was to know the activity of methanol extract, n-hexane Gelidium sp., and determined totalphenolic compound of pigments (chlorophyll a and carotenoid ...
Gunawan Widi Santosa   +7 more
core   +1 more source

Antioxidant activity of white grape seed extracts on DPPH radicals [PDF]

open access: yesActa 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.   +4 more
doaj   +1 more source

Determination of Antioxidants by DPPH Radical Scavenging Activity and Quantitative Phytochemical Analysis of Ficus religiosa

open access: yesMolecules, 2022
The use of F. religiosa might be beneficial in inflammatory illnesses and can be used for a variety of health conditions. In this article, we studied the identification of antioxidants using (DPPH) 2,2-Diphenyl-1-picrylhydrazylradical scavenging activity
Siddartha Baliyan   +6 more
doaj   +1 more source

Antioxidant Activity and Discrimination of Organic Apples (Malus domestica Borkh.) Cultivated in the Western Region of Romania: A DPPH· Kinetics–PCA Approach

open access: yesPlants, 2021
Apple (Malus domestica Borkh.) is one of the most used fruit for beverages in Romania. The goal of the study was to evaluate the antioxidant activity and discrimination of various parts of organic and non-organic apple varieties cultivated in the western
Olimpia Alina Iordănescu   +8 more
doaj   +1 more source

ICH Validation of DPPH Assay Method: Some Interesting Medicinal Drugs

open access: yesEurasian Journal of Science and Engineering, 2020
Background and Aim: As part of our antioxidant plants screening project, we conducted a phytochemical study on their antioxidant activity to provide a standard and reliable assessment tool.
Fatiha El Babili   +4 more
doaj   +1 more source

Determination of DPPH Radical Oxidation Caused by Methanolic Extracts of Some Microalgal Species by Linear Regression Analysis of Spectrophotometric Measurements

open access: yesSensors, 2007
The demonstrated modified spectrophotometric method makes use of the 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical and its specific absorbance properties. Theabsorbance decreases when the radical is reduced by antioxidants.
Ulf-Peter Hansen   +5 more
doaj   +1 more source

Synthesis and DPPH Radical Scavenging Activity of Prenylated Phenol Derivatives

open access: yesMolecules, 2012
The synthesis of twenty six prenylated phenols derivatives is reported. These compounds were obtained under mild conditions via Electrophilic Aromatic Substitution (EAS) coupling reactions between phenol derivatives containing electron-donor subtituents ...
Héctor Carrasco   +9 more
doaj   +1 more source

Kinetics of quercetin and DPPH radical reaction

open access: yes, 2022
Kvercetin spada u podskupinu flavonola te mu se pripisuje niz bioloških učinaka: antioksidativni, antikarcinogeni, antialergijski, protuupalni i drugi.
Murković, Dorotea
core   +1 more source

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