摘要
以枸杞酒糟为原料,采用超微粉碎结合超声波-碱法进行处理,研究枸杞酒糟可溶性膳食纤维(Solubledietaryfiber,SDF)提取的工艺条件,并测定提取的SDF理化性质。以单因素试验结合响应面试验优化分析,获取最优工艺条件,并对提取的SDF进行粉粒结构、持水力、膨胀力、持油力、羟自由基(·OH)清除率、超氧阴离子自由基(O-·2)清除率的测定。结果表明,料液比为1∶12、超声波时间为40min、氢氧化钠质量分数为8%、超声波功率为250W时SDF的提取率最高,达到24.55%。SDF粉碎后径距为(2.1±0.001)μm、比表面积为1.100m^2/g、孔体积为6340cm^3/g、孔径为23.980nm,具有良好的粉粒参数。SDF持水力为(4.35±0.07)g/g、膨胀力为(4.67±0.13)mL/g、持油力为(5.02±0.07)g/g。SDF对·OH和O-·2具有较好的清除作用。
Chinese wolfberry distiller's grains were used as experimental materials and processed by superfine grinding combined with ultrasonic wave-alkali method to explore the process conditions of extracting soluble dietary fiber(SDF) and its physiochemical properties.By combining the single-factor experiment with response surface method,the optimal process conditions were achieved and the structure,water holding capacity,swelling property,oil holding capacity,·OH clearance rate and O -· 2 clearance rate of SDF were determined.The results showed that,the highest extraction rate of SDF reached 24.55% when the ratio of material to liquor was 1∶ 12,the ultrasonic time was 40 min,the mass fraction of sodium hydroxide was 8%,and the ultrasonic wave power was 250 W.The span of extracted SDF after smashing was (2.1±0.001)μm,the surface area was 1.100 m^2/g,the pore volume was 6 340 cm^3/g,and the pore radius was 23.980 nm.It had good particle parameters.The water holding capacity of extracted SDF was (4.35±0.07)g/g,the swelling property was (4.67±0.13)mL/g,and the oil holding capacity was (5.02 ±0.07)g/g.SDF had better clearance ability on ·OH and O -· 2.
作者
刘军
颉向红
徐昊
张喜康
马浩然
孔维洲
刘敦华
LIU Jun;XIE Xianghong;XU Hao;ZHANG Xikang;MA Haoran;KONG Weizhou;LIU Dunhua(College of Agriculture,Ningxia University,Yinchuan 750021,China)
出处
《河南农业科学》
北大核心
2019年第8期160-167,共8页
Journal of Henan Agricultural Sciences
基金
国家自然科学基金项目(31560436)
关键词
枸杞酒糟
可溶性膳食纤维
响应面法
理化性质
Chinese wolfberry distiller's grains
Soluble dietary fiber
Response surface method
Physio -chemical properties
