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超微粉碎对甘薯膳食纤维成分及物化特性影响

ISSN号：1003-0174
期刊名称：《中国粮油学报》
时间：0
分类：TS239[轻工技术与工程—粮食、油脂及植物蛋白工程;轻工技术与工程—食品科学与工程]
作者机构：[1]湖北省农业科学院农产品加工与核农技术研究所,武汉430064, [2]中国农业科学院农产品加工研究所食品化学与营养科学研究室,北京100193
相关基金：湖北省农业科技创新中心（2013-620-007-001）

关键词：甘薯膳食纤维, 超微粉碎, 物化特性, sweet potato dietary fiber （DF）, micronization, physicochemical properties

中文摘要：

为明晰超微粉碎对甘薯膳食纤维成分及物化特性影响,从而拓展其在食品工业中的应用,甘薯渣经筛法制备膳食纤维再进行超微粉碎处理,以大豆膳食纤维为对照,比较不同膳食纤维成分及物化特性指标.结果表明：与大豆膳食纤维相比,甘薯膳食纤维中可溶性膳食纤维、果胶、糖醛酸含量,持水性、吸水膨胀性、葡萄糖吸收能力和α-淀粉酶抑制能力显著高于大豆膳食纤维（P＜0.05）.甘薯膳食纤维经超微粉碎后,可溶性膳食纤维、果胶含量上升,淀粉、纤维素含量下降,蛋白、灰分等含量无明显变化;各项物化特性指标均显著上升（P＜0.05）.大豆膳食纤维、甘薯膳食纤维及超微粉碎后甘薯膳食纤维粒径分别为34.59、24.43、18.27 μm,扫描电镜下,膳食纤维呈片状多孔结构.

英文摘要：

The effect of micronization on sweet potato dietary fiber composition and physicochemical properties has been investigated in order to provide theoretical basis and technical support for sweet potato micronization with better application in food industry. Utilizing sweet potato residues as material, sweet potato dietary fiber （DF） were extracted by sieving method and micronized by jet milling subsequently; soybean DF was adopted as control; compo- sition, particle size and physicochemical properties index of different DF were investigated to clarify the effect of mi- cronization on composition and physicochemical properties of sweet potato DF. The results indicated that the content of total dietary fiber, soluble dietary fiber, pectin and uronic acid in sweet potato DF were significantly higher than the content in soybean DF （P 〈 0.05 ） ; furthermore, the water holding capacity, tion capacity and ~x - amylase inhabitation capacity of sweet potato DF were signifi swelling capacity, candy higher than glucose absorp- the correspond- ing value of soybean DF （ P 〈 0.05 ）. After sweet potato DF being treated by micronization, the content of soluble di- etary fiber, pectin significantly increased, the content of starch, cellulose significantly decreased （ P 〈 0.05 ）, no ob- viously change was observed in the content of protein, ash, fat, and physicochemical properties which investigated in the study were significantly increased （ P 〈 0.05 ） tion treated sweet potato DF were 34.59, 24.43, scanning electron microscope. ~ The particle size of soybean DF, sweet potato DF and microniza- and 18.27 ~m respectively, DF exhibited porous structure under

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