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首页> 外文期刊>International journal of food science & technology >Properties of soluble dietary fibre from defatted coconut flour obtained through subcritical water extraction
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Properties of soluble dietary fibre from defatted coconut flour obtained through subcritical water extraction

机译：亚临界水萃取脱脂椰子粉中可溶性膳食纤维的性质

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摘要

Response surface methodology was employed to optimise the process parameters for subcritical water extraction of soluble dietary fibre (SDF) from defatted coconut flour. The obtained model was applied to predict the optimum response values and verified by validation experiment. The composition, structure, properties and bioactivities of the extracted SDF were studied. Effects of extraction temperature, extraction time, solid-liquid ratio and mesh number on the yield of SDF were investigated. The extraction at 140 degrees C for 30 min, a solid-liquid ratio of 1:30, and a mesh number of 80 resulted in the extraction rate of SDF of 14%. Moreover, monosaccharide analysis indicated that SDF primarily contains mannose and galactose respectively. As indicated by X-ray diffraction and thermal analysis, SDF has low degree of crystallinity and high thermal stability. Additionally, SDF has high water holding, oil holding and swelling capacities, while exhibits high antioxidant activity against DPPH, ABTS(+) and OH radicals, as well as high in vitro hypoglycaemic activity. The SDF also exhibits good biofunctions, such as good toxic ions and bile acid salts adsorption. This study demonstrates that defatted coconut flour, which is an inexpensive source of natural dietary fibre, can be suitably used as a functional food ingredient in the food industry.
机译：响应面法用于优化从脱脂椰子粉中亚临界水萃取可溶性膳食纤维（SDF）的工艺参数。将获得的模型用于预测最佳响应值，并通过验证实验进行验证。研究了提取的SDF的组成，结构，性质和生物活性。研究了萃取温度，萃取时间，固液比和目数对SDF收率的影响。在140摄氏度下萃取30分钟，固液比为1:30，目数为80，SDF的萃取率为14％。此外，单糖分析表明SDF主要分别包含甘露糖和半乳糖。如X射线衍射和热分析所示，SDF具有较低的结晶度和较高的热稳定性。此外，SDF具有高保水性，保油性和溶胀能力，同时展现出对DPPH，ABTS（+）和OH自由基的高抗氧化活性，以及​​高的体外降血糖活性。 SDF还具有良好的生物功能，例如良好的毒性离子和胆汁酸盐吸附能力。这项研究表明，脱脂的椰子粉是一种廉价的天然膳食纤维，可以适当地用作食品工业中的功能性食品成分。

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