This review summarizes published information concerning the determination of antioxidant activity (AA) in coffee samples by various methods (ORAC, FRAP, TRAP, TEAC, etc.) in vitro and limited data of antiradical activity of coffee products in vitro and in vivo. Comparison is carried out of the AA of coffee Arabica and coffee Robusta roasted at different temperatures as well as by different roas...

Stoichiometric and kinetic values of phenolics against DPPH (2,2-diphenyl-1-picrylhydrazyl) were determined for Andean purple corn (Zea mays L.) and red sweetpotato (Ipomoea batatas). Both crops had higher antioxidant capacity and antiradical kinetics than blueberries and higher or similar anthocyanin and phenolic contents. The second-order rate constant (k(2)) was 1.56, 1.12, 0.57, and 0.26 (m...

CHEMICAL COMPOSITION AND PHOTOPROTECTIVE ANTIRADICAL ACTIVITIES OF THE BRANCHES Platonia insignis (CLUSIACEAE). The chemical study of the branches enabled isolation biflavonoid morelloflavone and identification, by mass spectrometry, over 14 polyphenols, including seven biflavonoids three derivatives, two benzophenones, one xanthone. in vitro biological tests solar photoprotection antiradical a...

Substantial injury can occur during reoxygenation of previously ischemic tissue in many experimental models, as the result of the generation of oxygen-derived free radicals. To test the antiradical activity of potentially protective compounds in this setting, we developed a simple screening system, applicable to fresh biopsy specimens, in which warm ischemia and reoxygenation of excised tissue ...

HIGHLIGHTS Chemical characterization of PA extracts has high content phenolic compounds. from G. angustifolia may be used in the pharmaceutical industry and agriculture. A total 66 compounds with approximate match percentage ≥ 89% were identified. The showed a antioxidant properties.

This study deals with the antioxidant and functional potential of subcritical water extracts from edible mushrooms, in comparison to commercial products. Pleurotus citrinopileatus showed highest phenolic content properties. Similar results were determined Coriolus versicolor. The growth inhibition selected human carcinogenic cells was identified for P. extract obtained during heating up 160 °C....

Paulownia tomentosa is a large indecidous tree planted mostly for its fast growing wood and decorative purposes. The tree is also used in traditional Chinese medicine. As a part of our study of natural polyphenols, the fruits of Paulownia tomentosa were extracted by EtOH and than subjected to liquid/liquid extraction. Fractions were analysed by TLC and HPLC to determine presence of phenolic sub...