School of Food and Advanced Technology, Massey University, Private Bag 11222, Palmerston North 4442, New Zealand.
Riddet Institute, Massey University, Private Bag 11222, Palmerston North 4442, New Zealand.
Molecules. 2023 Jan 6;28(2):575. doi: 10.3390/molecules28020575.
Globally, about one million tonnes of tea products, which contain high concentrations of catechins and their derivatives, are wasted annually. Therefore, green tea waste catechins (GTWCs) are worth extracting, processing, protection, and delivery to the human body. In this study, GTWCs were extracted using a green method and then encapsulated in both single- (SLLs) and double-layer liposomes (DLLs). The encapsulated extracts were subsequently incorporated into a fresh green kiwifruit juice. SLLs and DLLs containing GTWCs had a size of about 180 and 430 nm with a zeta potential of -35 and +25 mV, respectively. Electron microscopy illustrated the separation of the SLLs and fibre in kiwifruit juice and attraction of the DLLs to this fibre. Liposomal GTWCs were effectively maintained in the kiwifruit juice during the 28 days of storage (4 °C), demonstrating the effectiveness of this delivery system for high-value bioactives (i.e., catechins) from such a by-product (i.e., green tea waste).
全球每年约有 100 万吨含有高浓度儿茶素及其衍生物的茶叶被浪费掉。因此，绿茶废料儿茶素（GTWCs）值得提取、加工、保护并输送到人体。在本研究中，采用绿色方法提取 GTWCs，然后分别包封在单层（SLLs）和双层脂质体（DLLs）中。包封的提取物随后被掺入新鲜的绿奇异果汁中。含有 GTWCs 的 SLLs 和 DLLs 的大小约为 180nm 和 430nm，其 ζ 电位分别为-35mV 和+25mV。电子显微镜说明了 SLLs 在奇异果汁中的分离和纤维的分离，以及 DLLs 对这种纤维的吸引力。脂质体 GTWCs 在 28 天的储存期（4°C）内有效地保留在奇异果汁中，证明了这种输送系统对于从这种副产物（即绿茶废料）中提取高价值生物活性物质（即儿茶素）的有效性。
