Evaluation of total phenolics, flavonoids and antioxidant activity of 18 Korean onion cultivars: a comparative study

Abstract

Among the 18 cultivars, Sunpower is the most promising in terms of total phenolics, total flavonoids and antioxidant activity. Our results suggest that day length sensitivity/ripening among the cultivars do not play any significant role for high values of total phenolics, flavonoids and antioxidant activity.

Natural Antioxidant Activity and Compounds Content from Wastes of Euterpe edulis Berries

“…For antioxidant compounds extraction, ethanol aqueous solution is a preferred solvent system (Karacabey & Mazza, 2010;Sharma et al, 2014), since polyphenols have a varied range of solubility (Ilaiyaraja, Likhith, Sharath Babu, & Khanum, 2015), and use of solvents with different polarity potentials high yield of total antioxidants (Szydłowska-Czerniak, Tułodziecka, Karlovits, & Szłyk, 2015). Ethanol, a green safe solvent, (Kukula-Koch et al, 2013;Li et al, 2012) was utilized due to efficiency on solubilizing bioactive molecules from vegetable matrixes (Espinosa-Pardo et al, 2014;Fang, Wang, Hao, Li, & Guo, 2015;Sharma et al, 2014).…”

“…Ethanol, a green safe solvent, (Kukula-Koch et al, 2013;Li et al, 2012) was utilized due to efficiency on solubilizing bioactive molecules from vegetable matrixes (Espinosa-Pardo et al, 2014;Fang, Wang, Hao, Li, & Guo, 2015;Sharma et al, 2014). In addition, previous studies using MAE to the extraction of antioxidant compounds from fruits determined that the concentration of the solvent, microwave power and exposition time were independents variables (Dahmoune et al, 2014Fang et al, 2015;Kim et al, 2012;Li et al, 2012Li et al, , 2014Zeković et al, 2016).…”

The Effect of <b><i>Allium cepa</i></b> Extract on Lung Oxidant, Antioxidant, and Immunological Biomarkers in Ovalbumin-Sensitized Rats

“…It should also be noted that different results may also be related to the type of species chosen. In fact, it was shown that components and activities of onion are different on the basis of cultivars [28].…”

Chemical Composition and Biological Activity of A. cepa L. and A.&nbsp; &times; cornutum (Clementi ex Visiani 1842) Methanolic Extracts

“…In their study, TPC values of the two methanolic extracts of Spanish onion varieties ranged from 5.15 to 6.33 mg GAE/g DW for white onion, and 2.48 to 2.58 mg GAE/g DW for Calçot de Valls onion. However, it should be noted that TPC values could vary depending on the location of the cultivar and on the solvent used during the extraction process [1,[21][22][23][24].…”