Results 271 to 280 of about 301,453 (295)

Antioxidant capacity of lycopene-containing foods

International Journal of Food Sciences and Nutrition, 2001
Increased consumption of tomatoes and tomato products has been associated with decreased cancer risks. One fat-soluble compound identified in tomatoes which may be responsible for this association is lycopene. There may, however, be other antioxidants present in tomato-based foods, and total antioxidant capacity may be another way to rate the health ...
Z, Djuric, L C, Powell
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Antioxidant capacity of the neurohormone melatonin

Journal of Neural Transmission, 2005
The aim of this study was to elucidate the antioxidant behaviour of melatonin (M) and determine its activity-structure relationship. M or 5-metoxy-N acetyltriptamine is a neurohormone secreted by the pineal gland, which plays a proven role in maintaining sleep-wake rhythms.
E, Sofic, Z, Rimpapa, Z, Kundurovic, A, Sapcanin, I, Tahirovic, A, Rustembegovic, G, Cao   +6 more
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The Chemistry behind Antioxidant Capacity Assays

Journal of Agricultural and Food Chemistry, 2005
This review summarizes the multifaceted aspects of antioxidants and the basic kinetic models of inhibited autoxidation and analyzes the chemical principles of antioxidant capacity assays. Depending upon the reactions involved, these assays can roughly be classified into two types: assays based on hydrogen atom transfer (HAT) reactions and assays based ...
Dejian, Huang, Boxin, Ou, Ronald L, Prior   +2 more
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Antioxidant defense capacity in scleroderma patients

Clinical Chemistry and Laboratory Medicine, 2008
Oxidative stress is associated with scleroderma (systemic sclerosis) and is supposed to favor disease progression by complex effects on the vascular endothelium and on fibroblasts.Plasma oxidative process marker, thiobarbituric acid-reactive substances, and several markers of antioxidant defense capacity (plasma total antioxidant activity, serum ...
Roxana, Sfrent-Cornateanu, Carina, Mihai, Irina, Stoian, Daniela, Lixandru, Constantin, Bara, Elena, Moldoveanu   +5 more
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Antioxidant capacity of cornelian cherry (Cornus mas L.) – Comparison between permanganate reducing antioxidant capacity and other antioxidant methods

Food Chemistry, 2012
Ethanol extracts (80% in water) of 10 cornelian cherry (Cornus mas L.) genotypes were studied for antioxidant properties, using methods including DPPH(), ()NO, O(2)(-) and ()OH antiradical powers, FRAP, total phenolic and anthocyanin content (TPC and ACC) and also one relatively new, permanganate method (permanganate reducing antioxidant capacity-PRAC).
Boris M, Popović, Dubravka, Stajner, Kevrešan, Slavko, Bijelić, Sandra   +3 more
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Ferric Reducing Capacity Versus Ferric Reducing Antioxidant Power for Measuring Total Antioxidant Capacity

Laboratory Medicine, 2013
Objective: To compare the performance of the ferric reducing capacity (FRC) assay with the ferric reducing antioxidant power (FRAP) assay to measure the total antioxidant capacity (TAC) of serum samples. Methods: Serum from 10 healthy ethnic Chinese adult volunteers was assayed for TAC levels.
Christopher Seng Hong Lim, Siew Lin Lim
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Computational Antioxidant Capacity Simulation (CAOCS): A Novel Framework of Antioxidant Capacity Profiling

Chemical Product and Process Modeling, 2013
Abstract Inconsistent ranking is a well-known drawback of antioxidant capacity (AOC) profiling methodologies that use free-radical species as oxidant. This problem leads to assay results that are not biorelevant. Linear free energy relationships (LFER) theory predicts proton transfer (PT) kinetics as a surrogate for biorelevant hydrogen ...
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Modified Folin–Ciocalteu Antioxidant Capacity Assay for Measuring Lipophilic Antioxidants

Journal of Agricultural and Food Chemistry, 2013
The Folin-Ciocalteu (FC) method of performing a total phenolics assay, originally developed for protein determination, has recently evolved as a total antioxidant capacity assay but was found to be incapable of measuring lipophilic antioxidants due to the high affinity of the FC chromophore, that is, multivalent-charged phospho-tungsto-molybdate(V ...
Kadriye Isil, Berker, F Ayca, Ozdemir Olgun, Dilek, Ozyurt, Birsen, Demirata, Resat, Apak   +4 more
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Antioxidant capacity in Ginkgo biloba

Food Research International, 2002
Abstract The antioxidant capacity, AOC, of Ginkgo biloba nuts was determined after various periods of cooking. The AOC was based on the ability of the sample to scavenge 2,2′-azino-bis-(3-ethlybenzthiazoline-6-sulfonic acid) free radical ABTS+ . The heat-stable antioxidant components present in the nuts accounted for 60% AOC.
Goh, L.M., Barlow, P.J.
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Electrochemical Determination of the Antioxidant Capacity: The Ceric Reducing/Antioxidant Capacity (CRAC) Assay

Electroanalysis, 2008
AbstractThe CRAC assay is a direct electron transfer test of antioxidant capacity for several organic compounds. The ability of eight different compounds in reducing Ce4+ was studied by chronoamperometric measurements of the remaining Ce3+ species. The following antioxidant classification was observed: tannic acid $\rm{ \gg }$ quercetin>rutin> ...
Rafael de Queiroz Ferreira, Luis Alberto Avaca   +1 more
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