Results 1 to 10 of about 32,859 (221)

Ascorbic acid contribution to ORAC values in berry extracts: An evaluation by the ORAC-pyrogallol red methodology

Food Chemistry, 2009
An oxygen radical absorbance capacity (ORAC) method based on pyrogallol red bleaching (ORAC-PGR) was used to evaluate the scavenging activity of berry extracts (blackberry, blueberry, and raspberry). Among berry extracts, only raspberry protected pyrogallol red through a clear induction time, related exclusively to ascorbic acid.
Atala, E., Vásquez, L., Speisky Cosoy, Hernán, Lissi Gervaso, Eduardo A., López Alarcón, Camilo   +4 more
exaly   +10 more sources

Antioxidant capacity of herbal infusions and tea extracts: A comparison of ORAC-fluorescein and ORAC-pyrogallol red methodologies

Food Chemistry, 2008
Oxygen radical absorbance capacity (ORAC) values have been obtained for a series of teas and herbal infusions employing 2,2′-azo-bis(2-amidinopropane) as free radical source, and fluorescein and pyrogallol red as target molecules. The amounts of phenols in the extracts were evaluated by Folin’s methodology.
Alarcón Abarzúa, Emilio Isaac, Campos, A.M., EdwardsM., Ana M, Lissi, E., López Alarcón, Camilo Ignacio   +4 more
exaly   +5 more sources

Erythroside: A New Cerebroside and Other Compounds From Erythrina Caffra Thunb. (Fabaceae) Stem Bark, With Cytotoxicity and Antioxidant Evaluation [PDF]

Chem Biodivers
ABSTRACT The chemical investigation of a CH2Cl2:MeOH (1:1) extract of the stem bark of Erythrina caffra resulted in the isolation and characterisation of the novel cerebroside, erythroside (1), alongside eight other known compounds (2‐9). The isolated compounds were characterized by FT‐IR, 1D and 2D NMR spectroscopy, and ESI‐MS analysis.
Tsakem B, Serem J, Hlophe Y, Kamdem Kengne M, Sandjo L, Ndinteh D, Teponno R, Ambele M, Siwe Noundou X.   +8 more
europepmc   +2 more sources

Phytochemical Composition and Antioxidant Activities of <i>Sonneratia caseolaris</i> (L.) Engl. Leaves and Roots: Insights Into a Promising Mangrove Species. [PDF]

Food Sci Nutr
UPLC‐ESI/HRMS profiling of the mangrove species Sonneratia caseolaris identified 45 metabolites in leaves and roots, mainly flavonoid glycosides, gallotannins, and other polyphenols, including two sulfated flavonoids not previously reported in mangroves.
Cerri F, Pagliari S, Mohamed S, Labra M, Campone L, Galli P.   +5 more
europepmc   +2 more sources

Exploiting Kinetic Features of ORAC Assay for Evaluation of Radical Scavenging Capacity

Antioxidants, 2023
The analysis and interpretation of data retrieved from Oxygen Radical Absorbance Capacity (ORAC) assays represent a challenging task. ORAC indexes originate from different mathematical approaches often lacking correct elucidation of kinetic features ...
Joana R. B. Carvalho, Bruno J R Gregório, Eduarda M P Silva   +2 more
exaly   +3 more sources

Relationship between oxygen radical absorbance capacity (ORAC) index, body composition and blood biochemical markers in overweight/obese compared to normal weight subjects: a cross-sectional study [PDF]

Journal of Health, Population and Nutrition
Background Obesity is an important preventable disease, which promotes the development of chronic disorders by altering several factors including oxidative stress. Dietary antioxidants protect the body against oxidative stress.
Zahra Madani, Maryam Moussavi Javardi, Golnaz Majdizadeh, Zahra Mostafaei, Seyyed Abolghassem Djazayeri, Majid Karandish, Ariyo Movahedi   +6 more
doaj   +2 more sources

Comparison of the polyphenol content and in vitro antioxidant capacity of fruit-based nutritional supplements commonly consumed by athletic and recreationally active populations

Journal of the International Society of Sports Nutrition, 2022
Background Polyphenol-rich fruit supplements are commonly consumed by recreationally active and athletic populations because of their proposed benefits to both exercise performance and recovery from prior exercise.
Lee Rickards, Anthony Lynn, Margo E. Barker, Mark Russell, Mayur K. Ranchordas   +4 more
doaj   +1 more source

Evaluation of Antioxidant Activity of Cinnamomum glanduliferum Leaf Oil Using Several In-vitro Assays

Archives of Pharmaceutical Sciences Ain Shams University, 2023
Numerous species of genus Cinnamomum have been utilized in traditional medicine for their diverse range of health benefits. One of the key properties of cinnamon that has gained significant attention in recent years is its antioxidant activity.
Gina A. Zakaria, Nada M. Mostafa , Rania F. Abou El-Ezz, Omayma A. Eldahshan   +3 more
doaj   +1 more source

Nutritional Quality and Nutraceutical Potential of Fruits and Vegetables as a tool for Genetic Breeding Programs

Agrociencia Uruguay, 2022
Prevention of the development of chronic diseases related to metabolic syndrome has been found to depend on a healthy diet. Among healthy foods, fruits and vegetables play a very important role due to their nutrient content, especially antioxidants ...
Virginia Ferrari, Gustavo Rodríguez, Matías González, Esteban Vicente, Gustavo Giménez, Danilo Cabrera, Facundo Ibañez   +6 more
doaj   +1 more source

Improvement of the Flavanol Profile and the Antioxidant Capacity of Chocolate Using a Phenolic Rich Cocoa Powder

Foods, 2020
Chocolate is made from cocoa, which is rich in (poly)phenols that have a high antioxidant capacity and are associated with the prevention of chronic diseases.
Rocío González-Barrio, Vanesa Nuñez-Gomez, Elena Cienfuegos-Jovellanos, Francisco Javier García-Alonso, Mª Jesús Periago-Castón   +4 more
doaj   +1 more source