The antioxidative properties of phlorotannins isolated from the brown alga Eisenia bicyclis were measured using the H-ORAC (Hydrophilic Oxygen Radical Absorbance Capacity) method. (scirp.org)
The natural variation in the phytochemical content of 22 broccoli genotypes was used to determine correlations among chemical composition (carotenoids, tocopherols and polyphenolics), chemical antioxidant activity (ORAC), and measures of cellular antioxidation [prevention of DNA oxidative damage and of oxidation of the biomarker dichlorofluorescein (DCFH) in HepG2 cells] using hydrophilic and lipophilic extracts of broccoli. (illinois.edu)
Inhibition of cellular oxidation by hydrophilic extracts (DCFH-H) and ORAC-H were ∼ 8- and 4-fold greater than DCFH-L and ORAC-L, respectively. (illinois.edu)
Lipophilic and Hydrophilic Antioxidant Capacities of Common Foods in the United States. (cuzenmatcha.com)
It was observed that this effect was a result of activity of both hydrophilic and lipophilic antioxidants present in fruit 7 . (aprifel.com)
Assay1
Chemical measures of antioxidant activity within the plant, such as the oxygen radical absorbance capacity (ORAC) assay, have been reported for many plant-based foods. (illinois.edu)
Polyphenol content1
For this reason, in the current study we compared cocoa powder and chocolate, products representing the commonly eaten portion of the cacao fruit, with powders and juices from so-called "Super Fruits" on measures of antioxidant activity, as measured by oxygen radical absorbance capacity (ORAC), total polyphenol content (TP), and total flavanol content (TF). (biomedcentral.com)
Antioxidants2
With the exception of eckol, the ORAC values of tested phlorotannins were higher than those of the well-known antioxidants (epigallocatechin gallate, resveratrol and L-ascorbic acid) used as positive controls. (scirp.org)
As a result of comparing with known ORAC values, it was found that the dieckol and fucofuroeckol A had stronger antioxidant activity than representative polyphenols (e.g., kaempferol, quercetin, myricetin and chlorogenic acid) derived from terrestrial plants. (scirp.org)
Also, DNA damage in the presence of the lipophilic extract was negatively correlated with both chemical and cellular measures of antioxidant activity as measured by ORAC-L (r = -0.705, p = 0.015) and DCFH-L (r = -0.671, p = 0.048), respectively. (illinois.edu)
Whether ORAC-H has more biological relevance than ORAC-L because of its magnitude or whether ORAC-L bears more biological relevance because it relates to cellular estimates of antioxidant activity remains to be determined. (illinois.edu)
Eating cherries contributes to a signifi cant increase in TAC due mainly to lipophilic antioxidant activity (ORACL) in plasma. (aprifel.com)
Assays2
The lipophilicity of the esters increased with increasing chain length of the acyl group and also led to the enhancement of their antioxidant properties that were evaluated using assays such as 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical scavenging capacity, oxygen radical absorbance capacity (ORAC) and reducing power of the molecules involved. (mun.ca)
6. Schaich KM, Tian X, Xie J. Reprint of "Hurdles and pitfalls in measuring antioxidant efficacy: A critical evaluation of ABTS, DPPH, and ORAC assays. (ceon.rs)
Oxygen3
M. K. Ehlenfeldt and R. L. Prior, "Oxygen Radical Absorbance Capacity (ORAC) and Phenolic and Anthocyanin Concentrations in Fruit and Leaf Tissues of Highbush Brueberry," Journal of Agricultural and Food Chemistry, Vol. 49, No. 5, 2001, pp. 2222-2227. (scirp.org)
Recently Brunswick Laboratories conducted an independent study, (in-vitro) using Moringa to test its Oxygen Radical Absorbance Capacity (or ORAC value score). (healingmoringatree.com)
The last one with direct transferrable results for human health is the oxygen radical absorbance capacity (ORAC) technique, which is also an effective method for measuring TAC of human blood plasma 2 . (aprifel.com)
Extracts1
For lipophilic extracts, ORAC (ORAC-L) correlated with inhibition of cellular oxidation of DCFH (DCFH-L, r = 0.596, p = 0.006). (illinois.edu)
Fruit1
Similarly, dark chocolate was a significantly more concentrated source of ORAC and TF than the fruit juices. (biomedcentral.com)
Prevention1
Native honey (1% w/v pH 7.4, 10(6) cells) showed strong quenching activity against lipophilic cumoxyl and cumoperoxyl radicals, with significant suppression/prevention of cell damage, complete inhibition of cell membrane oxidation, of intracellular ROS production and recovery of intracellular GSH. (researchgate.net)
Values1
Lipid ORAC values are highest for δ-tocotrienol. (wikipedia.org)
Source1
Among the various powders that were tested, cocoa powder was the most concentrated source of ORAC and TF. (biomedcentral.com)
Oxygen radical4
The dietary antioxidant capacity was estimated based on the oxygen radical absorbance capacity (ORAC) incorporated with a semiquantitative food frequency questionnaire. (nih.gov)
ORAC is the abbreviation for oxygen radical absorbance capacity, which quantifies the antioxidant capacity of foods. (mendosa.com)
Total phenolic content (TPC), 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging activity and oxygen radical absorbance capacity (ORAC) were employed to determine the content of ethanol extractable phenolic compounds. (mdpi.com)
Neither lowbush nor highbush blueberry phenolic acid mixture contributed significantly to the total antioxidant capacity of their relevant whole berries measured by oxygen radical absorbance capacity (ORAC). (springer.com)
Hydrophilic4
He kindly send me a copy of the article, Lipophilic and hydrophilic antioxidant capacities of common foods in the United States , in the June 2004 issue of the Journal of Agricultural and Food Chemistry . (mendosa.com)
At the same time their testing now includes both lipophilic and hydrophilic antioxidant capacities. (mendosa.com)
Lipophilic means having an affinity for lipids or fat, and hydrophilic means having an affinity for water. (mendosa.com)
Wu X, Beecher GR, Holden JM, Haytowitz DB, Gebhardt SE, Prior RL (2004) Lipophilic and hydrophilic antioxidant capacities of common foods in the United States. (springer.com)