Department of Chemical, Environmental and Materials Engineering, University of Jaén, Campus Las Lagunillas, s/n, Building B3, 23071 Jaén, Spain.
Department of Chemical, Environmental and Materials Engineering, University of Jaén, Campus Las Lagunillas, s/n, Building B3, 23071 Jaén, Spain.
Food Chem. 2020 Aug 1;320:126626. doi: 10.1016/j.foodchem.2020.126626. Epub 2020 Mar 20.
Olive leaves are considered a promising source of bioactives such as phenolic compounds and mannitol. The extraction of high added value products is an issue of great interest and importance from the point of view of their exploitation. However, the content of these compounds can differ between cultivars and extraction methods. In this work, six olive leaves cultivars, including three wild cultivars, and two extraction processes (an innovative and alternative technique, pressurized liquid extraction, and a conventional Soxhlet extraction) were evaluated and compared towards the selective recovery of bioactive compounds. The wild cultivars showed the highest content of phenolic and flavonoid compounds, being oleuropein the compound present in higher amount. Findings also revealed that the highest mannitol content in the extracts was observed with the commercial cultivars, specifically in Arbequina. It is thus possible to decide which cultivars to use in order to obtain the highest yield of each bioproduct.
橄榄油树叶被认为是生物活性物质（如酚类化合物和甘露醇）的有前途的来源。从开发的角度来看，提取高附加值产品是一个非常关注和重要的问题。然而，这些化合物的含量在品种和提取方法之间可能有所不同。在这项工作中，评估并比较了六个橄榄油树叶品种，包括三个野生品种，和两种提取工艺（一种创新和替代技术，加压液体提取，和一种常规索氏提取），以选择性地回收生物活性化合物。野生品种表现出最高的酚类和类黄酮化合物含量，其中橄榄苦苷的含量最高。研究结果还表明，在提取物中甘露醇含量最高的是商业品种，特别是在阿贝基纳。因此，可以决定使用哪些品种来获得每种生物产品的最高产量。
