Αntioxidant activity of Cynara scolymus L. and Cynara cardunculus L. extracts obtained by different extraction techniques.
Extracts of different parts (heads, bracts and stems) of Cynara cardunculus L. (cardoon) and Cynara scolymus L. (globe artichoke), obtained by two different extraction techniques (Ultrasound-Assisted Extraction (UAE) and classical extraction (CE)) were examined and compared for their total phenolic content (TPC) and their antioxidant activity. Moreover, infusions of the plant's parts were also analysed and compared to aforementioned samples. Results showed that cardoon's heads extract (obtained by Ultrasound-Assisted Extraction) displayed the highest TPC values (1.57 mg Gallic Acid Equivalents (GAE) g-1fresh weight (fw)), the highest DPPH•scavenging activity (IC50; 0.91 mg ml-1) and the highest ABTS•+radical scavenging capacity (2.08 mg Trolox Equivalents (TE) g-1fw) compared to infusions and other extracts studied. Moreover, Ultrasound-Assisted Extraction technique proved to be more appropriate and effective for the extraction of antiradical and phenolic compounds.
a Laboratory of Food Chemistry, Department of Chemistry , National and Kapodistrian University of Athens , Athens , Greece.
Eleni
E
Kollia
a Laboratory of Food Chemistry, Department of Chemistry , National and Kapodistrian University of Athens , Athens , Greece.
Panagiota
P
Markaki
b Institute of Biology, Medicinal Chemistry and Biotechnology , National Hellenic Research Foundation , Athens , Greece.
Panagiotis
P
Zoumpoulakis
a Laboratory of Food Chemistry, Department of Chemistry , National and Kapodistrian University of Athens , Athens , Greece.
Charalampos
C
Proestos
D000975:Antioxidants / Q000737:chemistry / Q000494:pharmacology*; D052160:Benzothiazoles / Q000737:chemistry; D001713:Biphenyl Compounds / Q000737:chemistry; D031942:Cynara / Q000737:chemistry*; D031943:Cynara scolymus / Q000737:chemistry*; D016166:Free Radical Scavengers / Q000737:chemistry / Q000494:pharmacology; D010636:Phenols / Q000737:chemistry / Q000494:pharmacology; D010851:Picrates / Q000737:chemistry; D010936:Plant Extracts / Q000737:chemistry / Q000494:pharmacology*; D013451:Sulfonic Acids / Q000737:chemistry; D014465:Ultrasonics
D000975:Antioxidants; D052160:Benzothiazoles; D001713:Biphenyl Compounds; D016166:Free Radical Scavengers; D010636:Phenols; D010851:Picrates; D010936:Plant Extracts; D013451:Sulfonic Acids; C002502:2,2'-azino-di-(3-ethylbenzothiazoline)-6-sulfonic acid; C004931:1,1-diphenyl-2-picrylhydrazyl
Artichoke; antioxidant activity; cardoon; total phenolic content