摘要
以拟微球藻藻粉为原料,采用超声辅助碱法提取不溶性膳食纤维(IDF),并对其理化特性进行研究。结果表明:最优提取条件为NaOH浓度1.8 mol/L、提取时间45 min、料液比1∶30(g/mL)、提取温度55℃,在此条件下藻粉IDF得率和纯度分别达到24.98%±0.93%和86.12%±0.25%。藻粉IDF理化指标分析显示,其持水力为(6.65±0.09)g/g、膨胀力为(6.25±0.18)mL/g、持油力为(1.90±0.03)g/g。体外吸附试验结果表明,藻粉IDF对NO_(2)^(-)、葡萄糖、胆固醇、胆酸钠均表现出较强的吸附能力。傅里叶红外光谱分析结果表明,藻粉IDF具有典型的多糖结构。
Using Nannochloropsis gaditana powder as raw material,insoluble dietary fiber(IDF)was extracted by ultrasonic-assisted alkaline method,and its physicochemical property was investigated.The results indicated that the optimal extration conditions were NaOH concentration 1.8 mol/L,extraction time 45 min,solid-liquid ratio 1:30(g/mL)and extraction temperature 55℃.Under the conditions,the yield and purity of Nannochloropsis gaditanapowder IDF reached 24.98%±0.93%and 86.12%±0.25%,respectively.Analysis of the physicochemical indicators of Nannochloropsis gaditana powder IDF showed that its water-holding capacity was(6.65±0.09)g/g,swelling capacity was(6.25±0.18)mL/g,and oil-holding capacity was(1.90±0.03)g/g.The in vitro adsorption test results showed that the algal powder IDF exhibited strong adsorptioncapacity for NO_(2)^(-),glucose,cholesterol,and sodiumcholate.FT-IR infrared spectroscopy analysis indicated that Nannochloropsis gaditana powder IDF had typical polysaccharide structure.
作者
陈睿
张美兰
张蝶
张立伟
CHEN Rui;ZHANG Mei-lan;ZHANG Die;ZHANG Li-weil(College of Food Science and Engineering,Wuhan Polytechnic University,Wuhan 430023,Hubei,China;Key Laboratory of Deep Processing of Major Grain and Oil of Ministry of Education,Wuhan 430023,Hubei,China)
出处
《粮食与油脂》
北大核心
2024年第6期117-122,152,共7页
Cereals & Oils
关键词
拟微球藻
超声波辅助碱法
不溶性膳食纤维
理化性质
Nannochloropsis gaditana
ultrasonic-assisted alkaline method
insoluble dietary fiber
physicochemical property
