Antioxidant properties and composition of Majorana syriaca extracts

Ai-Bandak, G; Oreopoulou, V

dc.contributor.author	Ai-Bandak, G	en
dc.contributor.author	Oreopoulou, V	en
dc.date.accessioned	2014-03-01T01:25:55Z
dc.date.available	2014-03-01T01:25:55Z
dc.date.issued	2007	en
dc.identifier.issn	1438-7697	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/17820
dc.subject	Majorana syriaca	en
dc.subject	Natural antioxidants	en
dc.subject	Origanum species	en
dc.subject	Polyphenols	en
dc.subject.classification	Food Science & Technology	en
dc.subject.classification	Nutrition & Dietetics	en
dc.subject.other	Majorana	en
dc.subject.other	Origanum	en
dc.subject.other	Zea mays	en
dc.title	Antioxidant properties and composition of Majorana syriaca extracts	en
heal.type	journalArticle	en
heal.identifier.primary	10.1002/ejlt.200600234	en
heal.identifier.secondary	http://dx.doi.org/10.1002/ejlt.200600234	en
heal.language	English	en
heal.publicationDate	2007	en
heal.abstract	Majorana syriaca is an important food-flavouring ingredient in the Middle Eastern culture known commonly as Za'atar. The components of the plant were extracted in a Soxhlet apparatus sequentially with solvents of increasing polarity, specifically with petroleum ether (P), diethyl ether (D), ethyl acetate (EAc), and ethanol (E). The activity of the extracts to scavenge the 2,2-diphenyl-1-picrylhydrazyl radical (DPPH) followed the order D > E > EAc > P. Moreover, the antioxidant activity in corn oil at concentrations of 200,500 and 1000 ppm was monitored through peroxide value and conjugated hydroperoxide measurements and revealed that D and E extracts resulted in the highest protection followed by EAc and P extracts. Increasing the concentration from 200 to 500 ppm depressed peroxide formation, while a further increase had no effect. The main components of the P extract according to GS-MS analysis were thymol (42.89%) and carvacrol (42.75%). The remaining extracts comprise flavonoids and phenolic acids that provide the antiradical and antioxidant activity. © 2007 WILEY-VCH Verlag GmbH & Co. KGaA.	en
heal.publisher	WILEY-V C H VERLAG GMBH	en
heal.journalName	European Journal of Lipid Science and Technology	en
dc.identifier.doi	10.1002/ejlt.200600234	en
dc.identifier.isi	ISI:000245200500008	en
dc.identifier.volume	109	en
dc.identifier.issue	3	en
dc.identifier.spage	247	en
dc.identifier.epage	255	en