摘要
为制备高品质的沙果渣膳食纤维,研究超高压处理对沙果渣中膳食纤维的影响。以沙果渣为原料,采用响应面试验优化了超高压处理的料液比、压力和时间等条件,对优化后沙果渣膳食纤维的持水力、持油力、膨胀力和功能特性等理化性质进行了分析,并借助扫描电镜和红外光谱等方法分别对其微观结构与官能团进行表征。结果表明:最佳处理条件为处理压力300 MPa,时间15 min,料液比1∶19.30(g/mL),该条件下沙果渣膳食纤维的可溶性膳食纤维含量、持水力、持油力、膨胀力、阳离子交换能力、对胆固醇吸附量、吸附葡萄糖能力分别为21.71%、7.81 g/g、8.03 g/g、7.20 mL/g、0.78 mmol/g、14.31 mg/g和8.20 mg/g,与未处理样品相比,均有了显著提高(P<0.05)。扫描电镜显示经超高压处理后的沙果渣膳食纤维样品与未经处理样品相比,呈现不规则形状,表面变得更加疏松多孔,网状及层状结构增多;红外光谱分析表明超高压处理后的沙果渣膳食纤维中有纤维素、半纤维素和木质素等的特征吸收峰。
In order to prepare the high-quality dietary fiber,ultra high pressure(UHP)processing was used to study the effects on dietary fiber from Malus asiatica Nakai residue.These parameters such as ratio of solid to liquid,pressure and processing time were optimized by response surface methodology.The physical and chemical properties such as the water holding capacity(WHC),oil holding capacity(OHC),swelling capacity(SC)and functional properties of the dietary fiber processed by UHP were analyzed.And the microstructure and functional groups were characterized by scanning electron microscopy(SEM)and infrared spectra.The results showed that the optimum preparation conditions were as follows:pressure was 300 MPa,processing time was 15 min and ratio of solid to liquid reached 1∶19.30(g/mL).Under the optimum processing conditions,the SDF content,WHC,OHC,SC,cation exchanging capacity,cholesterol adsorption amount and glucose adsorption capacity of the dietary fiber processed by UHP were 21.71%,7.81 g/g,8.03 g/g,7.20 mL/g,0.78 mmol/g,14.31 mg/g and 8.20 mg/g,respectively,compared with untreated samples,it had a significant improvement(P<0.05).Meanwhile,the dietary fiber from M.asiatica residue processed by UHP was observed with SEM and showed that the microstructure was irregular shape,loose and porous surface with lattice-like and flake-like structure.The infrared spectra analysis showed that the characteristic absorption peaks of cellulose,hemicelluloses and lignin were found in the dietary fiber processed by UHP.
作者
朱丹
朱立斌
牛广财
苗欣月
魏文毅
王坤
ZHU Dan;ZHU Li-bin;NIU Guang-cai;MIAO Xin-yue;WEI Wen-yi;WANG Kun(College of Life Science and technology,Heilongjiang Bayi Agricultural University;Food College,Heilongjiang Bayi Agricultural University;Agri-Food Processing and Engineering Technology Research Center of Heilongjiang Province,Daqing 163319,China)
出处
《天然产物研究与开发》
CAS
CSCD
北大核心
2020年第1期118-126,共9页
Natural Product Research and Development
基金
黑龙江省大庆市科技计划(ZD-2016-153)
关键词
沙果渣
膳食纤维
超高压处理
响应面法优化
结构表征
Malus asiatica Nakai residue
dietary fiber
ultra high pressure(UHP)
response surface methodology optimization
microstructural characteristics
