Biochemical Characterization of Turkish Extra Virgin Olive Oils from Six Different Olive Varieties of Identical Growing Conditions
| العنوان: | Biochemical Characterization of Turkish Extra Virgin Olive Oils from Six Different Olive Varieties of Identical Growing Conditions |
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| المؤلفون: | Somer Bekiroglu, Erdal Ertas, İbrahim Sani Özdemir, Çağdaş Dağ, Ilknur Demirtas |
| المصدر: | Journal of the American Oil Chemists' Society. 92:1349-1356 |
| بيانات النشر: | Wiley, 2015. |
| سنة النشر: | 2015 |
| مصطلحات موضوعية: | chemistry.chemical_classification, General Chemical Engineering, Organic Chemistry, food and beverages, Fatty acid, Biology, Sterol, Horticulture, chemistry.chemical_compound, chemistry, Botany, Palmitoleic acid, Composition (visual arts), Cultivar, Stearic acid, Tocopherol, Chemical composition |
| الوصف: | Extra virgin olive oils were extracted from six different major olive cultivars (Gemlik, Ayvalik, Domat, Akhisar, Memecik, Arbequina) cultivated in the Aegean region of Turkey. Fatty acid, sterol and tocopherol compositions were analyzed and the results were compared by multivariate statistical analysis. Olive samples were collected from the same orchard in order to limit the contribution of parameters such as climate, soil quality and agricultural practices to the total variance of chemical composition of olive oils. Principal component analysis (PCA) showed that cultivars can be clearly distinguished on the basis of fatty acid and sterol composition. It is of interest to note that palmitoleic acid content of Arbequina, a Spanish cultivar, is significantly (p < 0.05) higher than the local Turkish cultivars in question and it is the only olive sample whose palmitoleic acid concentration is higher than that of the stearic acid concentration, exhibiting a divergent composition from the local Turkish cultivars. beta-Sitosterol and Delta 5-avenasterol contents of the oils are significantly correlated (r = -0.989, p < 0.05) and this results in a discriminative axis on the PCA loading plot. Tocopherol composition was relatively insufficient in discriminating the olive varieties. Regarding tocopherol compositions Gemlik cultivar is distinguished from other cultivars with its gamma-tocopherol content, which is in average two times higher than that of other cultivars. The result of the present compositional study provides important data which can be used for olive oil authenticity studies in Turkey. |
| تدمد: | 1558-9331 0003-021X |
| DOI: | 10.1007/s11746-015-2691-7 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::629c06cd304123b31cb6d88599cc890d https://doi.org/10.1007/s11746-015-2691-7 |
| Rights: | OPEN |
| رقم الانضمام: | edsair.doi.dedup.....629c06cd304123b31cb6d88599cc890d |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 15589331 0003021X |
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| DOI: | 10.1007/s11746-015-2691-7 |