摘要
以竹笋膳食纤维(bamboo shoots dietary fiber,BSDF)为原料,探究高压均质(high-pressure homogenization,HPH)处理对BSDF理化及结构特性的影响。结果表明,HPH处理后的BSDF粒径显著减小(P<0.05);持水力、持油力、膨胀力、葡萄糖及亚硝酸盐吸附能力均显著增加(P<0.05),当处理压力为100 MPa时,BSDF粒径最小,为(630.56±28.09)nm,持水力、持油力和膨胀力分别比未处理组提高了42.26%、53.30%、52.47%,葡萄糖及亚硝酸盐吸附能力也均达到最大值。傅里叶红外光谱、X-射线衍射、扫描电镜及热重分析表明,HPH处理后的BSDF结晶度减小,部分纤维素、半纤维素及木质素降解,热稳定性降低,表面结构疏松,但有团聚现象产生。可见,HPH处理有效改善了BSDF的特性,可作为一种改性膳食纤维的优良方法。
In this study,the effects of high-pressure homogenization(HPH)treatments on the physicochemical and structural properties of dietary fiber from bamboo shoots were explored.Results showed that the particle size of bamboo shoots dietary fiber(BSDF)decreased significantly(P<0.05)by the treatment of HPH,however,the water holding capacity(WHC),oil holding capacity(OHC),swelling capacity(SC),and glucose and nitrite ion absorption capacity were increased remarkedly(P<0.05).When the pressure of HPH was 100 MPa,the particle size(630.56±28.09)nm of BSDF was smallest,WHC,OHC and SC were increased by 42.26%,53.30%and 52.47%respectively,and the adsorption capacity of glucose and nitrite also reached maximum.Results of Fourier transform infrared,X-ray diffraction,scanning electron microscopy and thermogravimetric analysis showed that the crystallinity of BSDF was decreased after HPH,the cellulose,hemicellulose and lignin partially degraded,the thermal stability was decreased,and the surface structure was loose.However,the agglomeration occurred.In conclusion,HPH treatment can effectively improve the physicochemical and structural properties of BSDF,which can be used as an excellent method to modify dietary fiber.
作者
游玉明
王昱圭
张洁
郑炯
吴良如
YOU Yuming;WANG Yugui;ZHANG Jie;ZHENG Jiong;WU Liangru(College of Landscape Architecture and Life Science,Chongqing University of Arts and Sciences,Chongqing 402160,China;College of Food Science,Southwest University,Chongqing 400715,China;China National Bamboo Research Center,Hangzhou 310012,China)
出处
《食品与发酵工业》
CAS
CSCD
北大核心
2021年第10期30-36,共7页
Food and Fermentation Industries
基金
国家自然科学基金(31701617)
重庆市技术创新与应用发展项目(cstc2019jscx-msxmX0386)
重庆市教委科学技术研究项目(KJQN202001307)。
关键词
高压均质
竹笋
膳食纤维
吸附能力
结晶度
high-pressure homogenization
bamboo shoots
dietary fiber
adsorption capacity
crystallinity
