Research Unit "Nutrition et Métabolisme Azotés et Protéines de Stress" (UR/ES-13-29), Biology Department, Faculty of Sciences of Tunis (FST), University of Tunis El-Manar (UTM), University Campus of Tunis El-Manar, 2092 Tunis, Tunisia.
Chemical Engineering Department (DEQ), School of Industrial Engineering of Barcelona (ETSEIB), Universitat Politècnica de Catalunya (UPC), Av, Diagonal 647, 08028 Barcelona, Spain.
Molecules. 2018 Jul 7;23(7):1657. doi: 10.3390/molecules23071657.
The main targets of this work were to determine the phenolic content of () leaves and flowers and to evaluate their antioxidant activity. Total polyphenols and flavonoid content (TPC and TFC, respectively) were determined. Antioxidant capacity was evaluated by the Ferric Reducing Antioxidant Power (FRAP), the Oxygen Radical Absorbance Capacity (ORAC), the Trolox Equivalent Antioxidant Capacity (TEAC) and the diphenyl picrylhydrazyl (DPPH) assays, and by the analysis of primary and secondary oxidation products in oil-in-water emulsions and in raw beef patties during storage. The results revealed that the flowers of the contained the highest content of total polyphenols and flavonoids and extracts from these tissues exhibited the strongest antioxidant activity, as they were more effective at retarding lipid oxidation in oil-in-water emulsions and raw beef patties than extracts from the leaves which had a potent antioxidant effect only at the beginning of the oxidation process. The results of this study allowed us to obtain a deep knowledge about the properties of and confirmed the possibility of using its biologically active extracts in the food, cosmetic and pharmaceutical industries.
这项工作的主要目标是确定（）叶和花的酚类含量，并评估其抗氧化活性。测定总多酚和类黄酮含量（TPC 和 TFC）。通过铁还原抗氧化能力（FRAP）、氧自由基吸收能力（ORAC）、Trolox 等效抗氧化能力（TEAC）和二苯基苦味肼基（DPPH）测定法以及在储存过程中分析油包水乳状液和生牛肉饼中的初级和次级氧化产物来评估抗氧化能力。结果表明，该植物的花中总多酚和类黄酮含量最高，这些组织的提取物表现出最强的抗氧化活性，因为它们在延缓油包水乳状液和生牛肉饼中的脂质氧化方面比叶提取物更有效，而叶提取物仅在氧化过程的开始时具有很强的抗氧化作用。这项研究的结果使我们能够深入了解的特性，并证实了在食品、化妆品和制药行业中使用其生物活性提取物的可能性。
