亚南（Tiliacora triandra）叶的生物活性化合物及其包封
Bioactive compounds and encapsulation of Yanang (Tiliacora triandra) leaves.
作者信息
Singthong Jittra, Oonsivilai Ratchadaporn, Oonmetta-Aree Jirawan, Ningsanond Suwayd
机构信息
Department of Agro-Industry, Faculty of Agriculture, Ubon Ratchathani University, Warinchamrap, Ubon Ratchathani, 34190 Thailand.
School of Food Technology, Institute of Agricultural Technology, Suranaree University of Technology, Muang, Nakhon Ratchasima, 30000 Thailand.
出版信息
Afr J Tradit Complement Altern Med. 2014 Apr 3;11(3):76-84. doi: 10.4314/ajtcam.v11i3.11. eCollection 2014.
BACKGROUND
Yanang (Tiliacora triandra) has been known as vegetable and herbal in northeast Thailand and Lao People's Democratic Republic. Extracts from Yanang leaves contain high amounts of polyphenol constituents possessing antioxidant activity.
MATERIALS AND METHODS
This work investigated bioactive compounds of Yanang extracts prepared by infusion with water, ethanol and acetone. Furthermore, this paper reports the design of the experimental method for optimization of Yanang encapsulation using three independent variables: the ratio of core material (Yanang), to wall material (gum Arabic), gum Arabic concentration and inlet temperature of spray drying on bioactive compounds stability. The stability of bioactive compounds was evaluated using phenolic compounds, total antioxidant, carotenoids and chlorophyll.
RESULTS
The study of the bioactivity of Yanang extracts found that extraction with water was the appropriate application. The study of Yanang encapsulation demonstrated that gum Arabic, as coating agents, protected bioactive compounds of Yanang. Optimized condition for the encapsulation was at the ratio of core to wall {1:4}, in gum Arabic concentration 10% (w/v), and inlet temperature at 160▯C. The results show that the bioactive compounds were mainly affected by the ratio of core to wall material. Besides, moisture content and particle size of encapsulation depend on inlet temperature of spray drying, and gum Arabic concentration, respectively. This optimization reveals that the encapsulation process did not lose the bioactive compounds.
CONCLUSION
Yanang extract with water was the main phenolic compound and showed high antioxidant activities. This study demonstrates the potentials of using spray drying process and optimization for the encapsulation of herbal products.
背景
在泰国东北部和老挝人民民主共和国，亚南（Tiliacora triandra）被用作蔬菜和草药。亚南叶提取物含有大量具有抗氧化活性的多酚成分。
材料与方法
本研究调查了用水、乙醇和丙酮浸渍制备的亚南提取物中的生物活性化合物。此外，本文报道了一种实验方法的设计，该方法使用三个独立变量来优化亚南的包封：核心材料（亚南）与壁材（阿拉伯胶）的比例、阿拉伯胶浓度以及喷雾干燥的进料温度对生物活性化合物稳定性的影响。使用酚类化合物、总抗氧化剂、类胡萝卜素和叶绿素评估生物活性化合物的稳定性。
结果
对亚南提取物生物活性的研究发现，用水提取是合适的应用方法。对亚南包封的研究表明，阿拉伯胶作为包衣剂可保护亚南的生物活性化合物。包封的优化条件为核心与壁材的比例为{1:4}，阿拉伯胶浓度为10%（w/v），进料温度为160℃。结果表明，生物活性化合物主要受核心与壁材比例的影响。此外，包封物的水分含量和粒径分别取决于喷雾干燥的进料温度和阿拉伯胶浓度。这种优化表明包封过程不会损失生物活性化合物。
结论
用水提取的亚南提取物是主要的酚类化合物，具有较高的抗氧化活性。本研究证明了喷雾干燥工艺及优化用于草药产品包封的潜力。
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