Journal
FOOD CHEMISTRY
Volume 339, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.foodchem.2020.128110
Keywords
Piperine; Electrooxidation; Potential antioxidant properties; Radical scavenging
Funding
- Ministry of Research and Innovation, CNCS -UEFISCDI within PNCDI III [PN-III-P4-ID-PCCF-20160050]
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The study applied electrochemical techniques to evaluate the redox behavior of piperine, the most abundant alkaloid in pepper, and found that it has potential antioxidant properties by reacting with highly oxidizing radicals similar to known antioxidants and binding redox-active metal ions.
Piperine, as the most abundant alkaloid in pepper, gained a lot of attention for possible antioxidant and therapeutic properties. Electrochemical techniques were applied to widely evaluate the redox behavior of piperine by comparison to that of well-known antioxidants: ascorbic acid, protocatechuic acid, syringic acid, tyrosine and capsaicin used as controls. Also, electrochemistry was involved in an innovative way to investigate the potential antioxidant properties of piperine combined with different in vitro peroxidation and reducing assays: (i) 1,1-diphenyl-2-picryl-hydrazyl free radical (DPPH) scavenging; (ii) 2,2,6,6-tetramethylpiperidinyl-1-oxy (TEMPO) scavenging; (iii) ferric ions (Fe3+) reducing power; (iv) hydrogen peroxide (H2O2) scavenging. Results show that piperine readily reacts with highly oxidizing radicals and bind redox-active metal ions in a similar manner as antioxidants used as model.
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