Duan Beibei, Tin Hoe-Seng, Mao Chengwen, Tong Xing, Wu Xuehui
College of Food Science, South China Agricultural University, Guangzhou 510642, China.
Foshan Haitian Flavouring and Food Co., Ltd., Foshan 528000, China.
Foods. 2024 Sep 12;13(18):2894. doi: 10.3390/foods13182894.
This study aimed to investigate the characteristics of different varieties of camellia oils and their diacylglycerol (DAG)-enriched derivatives in terms of triacylglycerol (TAG) species, bioactive components, volatile compounds, and antioxidant activity. Six types of camellia oils, including (C.O), (C.S), (C.G), along with commercially refined oil (C-C.O) and its DAG-enriched counterparts (at 40% and 80% enrichment), were analyzed and compared. Unique patterns of TAG profiles, fatty acid distributions on different glycerol backbones, tocopherol, squalene, total polyphenols, and volatile compounds were observed, suggesting that these characteristics can be utilized as a criterion to differentiate them. DAG-enriched oils exhibited increased levels of unsaturated fatty acids (UFAs) compared to C-C.O, albeit with decreased contents of tocopherol, squalene, and total polyphenols. Moreover, diverse volatile compounds were identified across all types of camellia oils, among which the DAG-enriched oils had distinct distribution characteristics compared with their crude oils, indicating the influence of the enrichment process on volatile compounds. Furthermore, DAG-enriched oils demonstrated reduced antioxidant activity abilities compared to their counterparts, with the highest activity observed in C.O, followed by C.G. Additionally, strong correlations were observed between antioxidant activity and tocopherol, as well as squalene content.
本研究旨在从三酰甘油（TAG）种类、生物活性成分、挥发性化合物和抗氧化活性方面，研究不同品种山茶油及其富含二酰甘油（DAG）的衍生物的特性。分析并比较了六种山茶油，包括 （C.O）、 （C.S）、 （C.G），以及市售精炼 油（C-C.O）及其富含DAG的对应物（富集度分别为40%和80%）。观察到TAG谱、不同甘油骨架上的脂肪酸分布、生育酚、角鲨烯、总多酚和挥发性化合物的独特模式，表明这些特性可作为区分它们的标准。与C-C.O相比，富含DAG的油类不饱和脂肪酸（UFA）含量增加，尽管生育酚、角鲨烯和总多酚含量有所下降。此外，在所有类型的山茶油中都鉴定出了多种挥发性化合物，其中富含DAG的油类与其原油相比具有明显的分布特征，表明富集过程对挥发性化合物有影响。此外，与对照相比，富含DAG的油类抗氧化活性降低，其中C.O的活性最高，其次是C.G。此外，还观察到抗氧化活性与生育酚以及角鲨烯含量之间存在强相关性。
