<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Karkoula, E.a</style></author><author><style face="normal" font="default" size="100%">Skantzari, A.a</style></author><author><style face="normal" font="default" size="100%">Melliou, E.a b</style></author><author><style face="normal" font="default" size="100%">Magiatis, P.a</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Direct measurement of oleocanthal and oleacein levels in olive oil by quantitative 1H NMR. Establishment of a new index for the characterization of extra virgin olive oils</style></title><secondary-title><style face="normal" font="default" size="100%">Journal of Agricultural and Food Chemistry</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">aldehyde</style></keyword><keyword><style  face="normal" font="default" size="100%">Aldehydes</style></keyword><keyword><style  face="normal" font="default" size="100%">article</style></keyword><keyword><style  face="normal" font="default" size="100%">California</style></keyword><keyword><style  face="normal" font="default" size="100%">chemistry</style></keyword><keyword><style  face="normal" font="default" size="100%">classification</style></keyword><keyword><style  face="normal" font="default" size="100%">Direct measurement</style></keyword><keyword><style  face="normal" font="default" size="100%">Extra virgin olive oil</style></keyword><keyword><style  face="normal" font="default" size="100%">Geographic origins</style></keyword><keyword><style  face="normal" font="default" size="100%">Greece</style></keyword><keyword><style  face="normal" font="default" size="100%">Harvest time</style></keyword><keyword><style  face="normal" font="default" size="100%">Low level</style></keyword><keyword><style  face="normal" font="default" size="100%">Magnetic Resonance Spectroscopy</style></keyword><keyword><style  face="normal" font="default" size="100%">methodology</style></keyword><keyword><style  face="normal" font="default" size="100%">New indices</style></keyword><keyword><style  face="normal" font="default" size="100%">Nuclear magnetic resonance spectroscopy</style></keyword><keyword><style  face="normal" font="default" size="100%">oleacein</style></keyword><keyword><style  face="normal" font="default" size="100%">oleocanthal</style></keyword><keyword><style  face="normal" font="default" size="100%">Olive oil</style></keyword><keyword><style  face="normal" font="default" size="100%">phenol derivative</style></keyword><keyword><style  face="normal" font="default" size="100%">Phenols</style></keyword><keyword><style  face="normal" font="default" size="100%">Plant Oils</style></keyword><keyword><style  face="normal" font="default" size="100%">Positive correlations</style></keyword><keyword><style  face="normal" font="default" size="100%">Sensitivity and Specificity</style></keyword><keyword><style  face="normal" font="default" size="100%">solvent</style></keyword><keyword><style  face="normal" font="default" size="100%">Solvents</style></keyword><keyword><style  face="normal" font="default" size="100%">species difference</style></keyword><keyword><style  face="normal" font="default" size="100%">Species Specificity</style></keyword><keyword><style  face="normal" font="default" size="100%">United States</style></keyword><keyword><style  face="normal" font="default" size="100%">vegetable oil</style></keyword><keyword><style  face="normal" font="default" size="100%">Vegetable oils</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2012</style></year></dates><urls><web-urls><url><style face="normal" font="default" size="100%">http://www.scopus.com/inward/record.url?eid=2-s2.0-84870339577&amp;partnerID=40&amp;md5=03efc9518e6dc96bcd7a857bbb251c87</style></url></web-urls></urls><number><style face="normal" font="default" size="100%">47</style></number><volume><style face="normal" font="default" size="100%">60</style></volume><pages><style face="normal" font="default" size="100%">11696-11703</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">A new method for direct measurement of the oleocanthal and oleacein levels in olive oil by quantitative 1H NMR was developed. The method was applied to the study of 175 monovarietal commercial Greek and California olive oil samples. The main findings were as follows: (1) There was a significant variation concerning the concentrations of oleocanthal and oleacein among the studied samples. Their concentrations ranged from nondetectable to 355 mg/kg and their sum (index D1) from 0 to 501 mg/kg. (2) There are olive varieties that independent of geographic origin and harvest time produce oil that contains both compounds in low levels. (3) There is a positive correlation of a high level of oleocanthal and oleacein in olive oils with the early time of harvest. Although there is a need for more extensive study, a new index for the characterization of extra virgin olive oils, which is a combination of D1 = oleocanthal + oleacein level and D2 = oleocanthal/oleacein ratio, seems to be very useful. © 2012 American Chemical Society.</style></abstract><notes><style face="normal" font="default" size="100%">cited By (since 1996)7</style></notes></record></records></xml>