Results 21 to 30 of about 6,112 (129)

Mechanism of antioxidant capacity assays and the CUPRAC (cupric ion reducing antioxidant capacity) assay

, 2008
We report on the application of a simple and versatile antioxidant capacity assay for dietary polyphenols, vitamin C and vitamin E utilizing the copper(II)-neocuproine (Cu(II)-Nc) reagent as the chromogenic oxidant, which we term the CUPRAC (cupric ...
Celik, Saliha Esin, Ozyurek, Mustafa, Apak, Resat, Guclu, Kubilay   +3 more
core   +1 more source

Analysis of antioxidant activity of carrots (Daucus carrota L.) using FRAP and CUPRAC methods

, 2021
Carrot antioxidant activity analysis has been carried out. Carrot juice was analyzed qualitatively by the FRAP method using FRAP reagent and by the CUPRAC method using copper (II) chloride solution, neucuproine solution, ammonium acetate buffer solution,
Muflihunna, Andi, Rachmayanti, Aprilya Sri, Effendi, Nurmaya   +2 more
core  

Application, Challenges, and Prospects of Non‐Thermal Processing Technologies for Seaweed Protein Extraction—A Review

Food Chemistry International, EarlyView.
This review highlights non‐thermal extraction technologies for seaweed proteins, emphasizing their mechanisms, impacts on protein structure and functionality, and sustainability potential. Key limitations related to species dependence, extract complexity, and scale‐up are discussed to guide future industrial and biorefinery applications.
Rahat Mahmud, Md Fuad Al Hasan, Shuvojit Roy, Tanvir Ahmed   +3 more
wiley   +1 more source

Heparin-stabilized gold nanoparticles-based CUPRAC colorimetric sensor for antioxidant capacity measurement

, 2021
Sensing of total antioxidant capacity (TAC) as an integrated parameter showing the collective action of various antioxidants is an important challenge in food, biochemical and drug analysis.
Apak, Resat, Bener, Mustafa, Sen, Furkan Burak   +2 more
core   +1 more source

Powdered hibiscus anthocyanin‐nanofibril complexes as natural colourants: Stability and application in yoghurt and soft candy

Coloration Technology, EarlyView.
Abstract The instability of anthocyanins limits their application as natural food colorants. This study aimed to enhance the stability of anthocyanins extracted from Hibiscus sabdariffa through copigmentation with protein nanofibrils produced from pea, rice, gluten and whey isolates. Linear and curly nanofibril structures were prepared and incorporated
Vildan Eyiz, İsmail Tontul, Selman Türker   +2 more
wiley   +1 more source

Synergistic enhancement SPF from annatto seed oil and alkaline extracts in association with organic UV filters

International Journal of Cosmetic Science, EarlyView.
An SPF formulation incorporating Bixa orellana seed extracts and oils showed enhanced UV protection, highlighting the potential of natural bioactive compounds as effective boosters in photoprotective cosmetic products. Abstract Objective This study investigated the antioxidant activity of oil and alkaline aqueous extracts obtained from Bixa orellana ...
Ister Cordeiro Mariotini, Aliny Rodrigues de Jesus da Conceição, Rodrigo Rezende Kitagawa, Bernardo de Jesus Pavuna, Claudia Masrouah Jamal, Claudineia Aparecida Sales de Oliveira Pinto, André Rolim Baby, Fabiana Vieira Lima Solino Pessoa, Mariana Santos Pinheiro   +8 more
wiley   +1 more source

Response of Melissa officinalis subsp. officinalis seedlings to Fe3O4‐NPs under in vitro conditions: physiological, biochemical and molecular analyses

Plant Biology, EarlyView.
Iron oxide nanoparticles influence the growth, antioxidant capacity, and gene activity of Melissa officinalis subsp. officinalis plants in vitro, revealing their potential as modulators of secondary metabolism. Abstract Application of iron oxide nanoparticles (NP) (Fe3O4‐NPs) in plant biotechnology presents new opportunities for enhancing metabolic ...
E. Bektaş, H. Şahin, H. İ. Güler, K. İ. Bektaş, K. Kaltalioğlu, N. E. Uzun   +5 more
wiley   +1 more source

An Integrated Metabolomics and Bioactivity Approach to Characterize Salvia heldreichiana and Salvia tomentosa Extracts

ChemistryOpen, Volume 15, Issue 10, October 2026.
S. heldreichiana and S. tomentosa can be considered as effective sources of natural bioactive agents for further in vivo pharmacological evaluation and development. The genus Salvia, widely known as sage, represents the largest group within the Lamiaceae family and includes numerous species with traditional uses.
Gokhan Zengin, Nilofar Nilofar, Alina Kalyniukova, Vasil Andruch, Giancarlo Angeles Flores, Paola Angelini, Roberto Venanzoni, Kubra Aslan, Ilhami Gulcin, Evren Yildiztugay   +9 more
wiley   +1 more source

Bioactive Properties of Achillea biserrata M.Bieb. Extracts: Phytochemical Analysis, Antioxidant Activity, Target Enzyme Inhibition, and Cytotoxic Effects

Chemistry &Biodiversity, Volume 23, Issue 9, September 2026.
Integrated evaluation of Achillea biserrata extracts combining LC‐MS/MS phytochemical profiling, antioxidant, enzyme inhibitory, and antiproliferative assays with multivariate chemometric analyses (Pearson correlation, PCA, hierarchical clustering, and PLS regression), revealing phytochemicals associated with the observed biological activities (The ...
Zühal Bayrakçeken Güven, Mustafa Abdullah Yilmaz, Huseyin Inceer   +2 more
wiley   +1 more source

An Iron(III)-S-methylthiosemicarbazone Complex: Synthesis, Spectral Characterization, and Antioxidant Potency Measured by CUPRAC and DPPH Methods

, 2022
An iron(III) complex, [Fe(L1)Cl].H2O, was synthesized by template condensation reaction of 1,1,1-Trifluoroacetylacetone-S-methylthiosemicarbazone hydrogen iodide (L) and 2,3-dihydroxybenzaldehyde in the presence of iron(III) ions.
Büşra KAYA, Kaya, Buşra
core   +1 more source