摘要
以藜麦麸皮为原料,经酶法制备可溶性膳食纤维(SDF)后,使用冷冻干燥、真空干燥、热风干燥和喷雾干燥方式干燥SDF,考察干燥方式对SDF结构形貌、理化性质及体外抗氧化活性的影响。结果表明:喷雾干燥的SDF持水力和持油力分别达到(3.95±0.14)g/g和(5.82±0.12)g/g,为4种干燥方式之最,其次是冷冻干燥;干燥方式对SDF官能团种类差异,但会导致吸收峰的强弱变化;冷冻干燥处理的SDF颗粒均匀,聚集体最小,存在大量孔隙;冷冻干燥处理的SDF中结合水较弱,不易流动水的结合强度较高和含量较低;冷冻干燥处理的SDF的DPPH·清除能力、ABTS+·清除能力、羟自由基清除能力最强,抗氧化活性最高,IC50分别达到1.88、1.38、8.18 mg/mL。冷冻干燥处理的SDF提高了抗氧化能力强和持水持油力,并提高其生物活性。
Soluble dietary fiber(SDF)was prepared from quinoa bran by enzymatic method,and then dried by freeze drying,vacuum drying,hot air drying and spray drying.The effects of drying methods on the structure,physicochemical properties and in vitro antioxidant activity of SDF were investigated.The results indicated that the water holding capacity and oil holding capacity of spray-dried SDF were(3.95±0.14)g/g and(5.82±0.12)g/g,respectively,the highest among the four drying methods,followed by freeze-drying.The drying method had different types of SDF functional groups,but it would lead to changes in the strength of the absorption peak;the freeze-dried SDF particles were uniform,the aggregates were the smallest,and there were a large number of pores.The bound water in SDF treated by freeze-drying was weak,and the binding strength of immobilized water was high,and the content was low.The DPPH free radical scavenging ability,ABTS+free radical scavenging ability and hydroxyl radical scavenging ability of SDF treated by freeze-drying were the strongest,and the antioxidant activity was the highest.The IC 50 were 1.88,1.38 and 8.18 mg/mL,respectively.In summary,freeze-dried SDF improved its antioxidant capacity,water and oil holding capacity,and improved its biological activity.
作者
季柳俊澜
曹龙奎
鹿保鑫
王维浩
全志刚
魏明智
胡鑫
于文婷
闫雨晨
张钰书
Ji Liujunlan;Cao Longkui;Lu Baoxin;Wang Weihao;Quan Zhigang;Wei Mingzhi;Hu Xin;Yu Wenting;Yan Yuchen;Zhang Yushu(College of Food Science,Heilongjiang Bayi Agricultural University,Daqing 163319;National Coarse Cereals Engineering Research Center,Heilongjiang Bayi Agricultural University,Daqing 163319)
出处
《中国粮油学报》
CAS
CSCD
北大核心
2024年第9期45-52,共8页
Journal of the Chinese Cereals and Oils Association
基金
国家重点研发计划子课题项目(2018YFE0206300)。
关键词
藜麦
干燥方式
水溶性膳食纤维
抗氧化性
quinoa
drying method
water-soluble dietary fiber
antioxidation