Physicochemical and functional properties of dietary fiber from Nannochloropsis oceanica: A comparison of alkaline and ultrasonic-assisted alkaline extractions

被引：34
作者：
Ding, Qingzhi [1 ,2 ]
Li, Zhikun [1 ]
Wu, Wei [1 ]
Su, Yingying [1 ]
Sun, Nianzhen [1 ]
Luo, Lin [1 ,2 ]
Ma, Haile [1 ,2 ]
He, Ronghai [1 ,2 ]
机构：
[1] Jiangsu Univ, Sch Food & Biol Engn, 301 Xuefu Rd, Zhenjiang 212013, Jiangsu, Peoples R China
[2] Jiangsu Univ, Inst Food Phys Proc, 301 Xuefu Rd, Zhenjiang 212013, Jiangsu, Peoples R China
来源：
LWT-FOOD SCIENCE AND TECHNOLOGY | 2020年 / 133卷
基金：
国家重点研发计划;
关键词：
Dietary fiber; Nannochloropsis oceanica; Ultrasonic-assisted alkaline extraction; Physicochemical properties; Adsorption properties; EXTRUSION PROCESS; RICH POWDER; IMPROVES; HYDROLYSIS;
D O I：
10.1016/j.lwt.2020.110080
中图分类号：
TS2 [食品工业];
学科分类号：
0832 ;
摘要：
In this study, the process parameters were optimized for extracting soluble dietary fiber (U-SDF) from the residue of Nannochloropsis oceanica (NR) by ultrasonic-assisted alkaline extraction (UAE). The structure, physicochemical and functional properties of U-SDF, insoluble dietary fiber (U-IDF) extracted by UAE, and soluble dietary fiber (A-SDF) extracted by alkaline extraction were investigated. The results showed that the U-SDF yield (17.50 +/- 0.26%) under optimal conditions increased by 150.72% compared with A-SDF. U-SDF exposed more hydrophilic groups (such as -OH) and more loose structure in comparison with A-SDF and U-IDF. In addition, U-SDF had higher solubility, adsorption capacity of cholesterol, sodium cholate, ammonium nitrite and glucose, and digestive enzyme (a-amylase and pancreatic lipase) inhibition ability in vitro than A-SDF and U-IDF. However, U-SDF had lower water holding capacity, water swelling capacity, and oil holding capacity than U-IDF. Thus it was indicated that DF from NR was a potentially available functional food ingredient, which will increase the added value of N. oceanica.
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页数：9
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