Results 381 to 390 of about 251,789 (396)

Screening of Brazilian plant extracts for antioxidant activity by the use of DPPH free radical method

Phytotherapy Research, 2001
L. L. Mensor, F. S. Menezes, G. Leitão, A. Reis, T. C. D. Santos, C. Coube, S. Leitão   +6 more
semanticscholar   +1 more source

Kinetika i mehanizam reakcije katehina i DPPH

2021
Katehin je flavonoid najviše prisutan u zelenom čaju koji se ističe po antioksidativnom učinku te štiti organizam od štetnih utjecaja oksidativnog stresa. Neki od mehanizama antioksidativnih učinaka katehina su: hvatanje slobodnih radikala, keliranje metalnih iona uključenih u proces nastajanja slobodnih radikala, induciranje antioksidativnih enzima ...
openaire   +2 more sources

Magnetic Ordering of the Delocalized Electron Spin in DPPH

1974
It is well known that the magnetism of itinerant electrons in metals or alloys remains a fundamental problem to be clarified. This problem also exists in quite a different kind of substance, solid aromatic free radicals having delocalized electrons. In contrast with metals or alloys, however, there are few investigations about the spatial distribution ...
S. Saito, T. Sato
openaire   +2 more sources

Comparison of ABTS, DPPH, FRAP, and ORAC assays for estimating antioxidant activity from guava fruit extracts

, 2006
K. Thaipong, U. Boonprakob, K. Crosby, L. Cisneros-Zevallos, D. Byrne   +4 more
semanticscholar   +1 more source

Use of standardized units for a correct interpretation of IC50 values obtained from the inhibition of the DPPH radical by natural antioxidants

Chemické zvesti, 2020
F. Martinez-Morales, Á. Alonso-Castro, J. Zapata-Morales, Candy Carranza-Álvarez, O. Aragon-Martinez   +4 more
semanticscholar   +1 more source

Effect of gallotannins on DPPH radical

Radiation Physics and Chemistry, 1995
A. Zalewska, Z. Kȩcki, I. Wawer
openaire   +2 more sources

In vitro antioxidant activity of Kyoho grape extracts in DPPH and ABTS assays: Estimation methods for EC50 using advanced statistical programs.

Food Chemistry, 2019
K. Sridhar, A. L. Charles
semanticscholar   +1 more source

Hyperfine Interaction in Mixed Crystal of DPPH and DPPH₂ Studied by ESR

Journal of the Physical Society of Japan, 1965
Toshiaki Kakitani, Kenji Gamo, Kohzoh Masuda, Jiro Yamaguchi   +3 more
openaire   +2 more sources

Borate suppresses the scavenging activity of gallic acid and plant polyphenol extracts on DPPH radical: A potential interference to DPPH assay

, 2020
Xing Chen, L. Liang, C. Han
semanticscholar   +1 more source

Comparison of ABTS/DPPH assays to measure antioxidant capacity in popular antioxidant-rich US foods

, 2011
Anna Floegel, Dae-Ok Kim, Sangjin Chung, S. Koo, Ock K. Chun   +4 more
semanticscholar   +1 more source