Laboratoire d'Electrochimie et Environnement, Ecole National d'Ingénieur de Sfax, Université de Sfax , B.P. 1173, 3038 Sfax, Tunisia.
Institut de l'olivier à Sfax, Unité Technologie et Qualité de l'huile d'olive , 3029 Sfax, Tunisia.
J Agric Food Chem. 2017 May 3;65(17):3512-3522. doi: 10.1021/acs.jafc.6b04122. Epub 2017 Apr 21.
Dynamics of squalene, sterol, aliphatic alcohol, pigment, and triterpenic diol accumulations in olive oils from adult and young trees of the Oueslati cultivar were studied for two consecutive years, 2013-2014 and 2014-2015. Data were compared statistically for differences by age of trees, maturation of olive, and year of harvesting. Results showed that the mean campesterol content in olive oil from adult trees at the green stage of maturation was significantly (p < 0.02) above the limit established by IOC legislation. However, the mean values of campesterol and Δ-7-stigmastenol were significantly (p < 0.01) above the limits in oils from young trees at the black stage of ripening. Principal component analysis was applied to alcohols, squalene, pigments, and sterols having noncompliance with the legislation. Then, data of 36 samples were subjected to a discriminant analysis with "maturation" as grouping variable and principal components as input variables. The model revealed clear discrimination of each tree age/maturation stage group.
连续两年（2013-2014 年和 2014-2015 年）研究了 Oueslati 品种成年和幼龄橄榄树橄榄油中角鲨烯、甾醇、脂肪醇、色素和三萜二醇的积累动态。通过树龄、橄榄成熟度和收获年份对数据进行了统计学差异比较。结果表明，在成熟的绿色阶段，成年橄榄树橄榄油中的菜油甾醇含量平均值明显（p<0.02）高于国际橄榄油理事会立法规定的限值。然而，在成熟的黑色阶段，幼龄橄榄树的橄榄油中的菜油甾醇和Δ-7-豆甾烯醇平均值明显（p<0.01）高于限值。对不符合法规的醇类、角鲨烯、色素和甾醇进行了主成分分析。然后，将 36 个样本的数据进行判别分析，以“成熟度”作为分组变量，以主成分作为输入变量。该模型清晰地区分了每个树龄/成熟阶段组。
