食品科学 ›› 2010, Vol. 31 ›› Issue (12): 132-136.doi: 10.7506/spkx1002-6630-201012030

• 工艺技术 • 上一篇    下一篇

雪莲薯原汁加工工艺及其对双歧杆菌生长的影响

吕明生1,王淑军1,徐兴权2,房耀维1,刘 姝1   

  1. 1.淮海工学院食品工程学院
    2.连云港市农业科学院
  • 收稿日期:2009-02-18 修回日期:2010-03-26 出版日期:2010-06-15 发布日期:2010-12-29
  • 通讯作者: 吕明生 E-mail:mingshenglu@hotmail.com

Optimization of Some Conditions for Yacon Juice Processing and Its Effect of the Growth of Bifidobacterium and Escherichia coli

LU Ming-sheng1,WANG Shu-jun1,XU Xing-quan2,FANG Yao-wei1,LIU Shu1   

  1. 1. School of Food Engineering, Huaihai Institute of Technology, Lianyungang 222005, China;
    2. Agriculture Science Academy of Lianyungang, Lianyungang 222006, China
  • Received:2009-02-18 Revised:2010-03-26 Online:2010-06-15 Published:2010-12-29
  • Contact: LU Ming-sheng1 E-mail:mingshenglu@hotmail.com

摘要:

为研究雪莲薯原汁的加工工艺及其对双歧杆菌生长的影响,在漂烫工艺中,选用100℃、2.5min 的工艺条件,通过正交试验确定纤维素酶酶解的最佳工艺条件为纤维素酶用量0.08%(m/m)、pH5、温度50℃、酶解时间45min。利用果胶酶提高雪莲薯汁的澄清度,果胶酶用量为0.14%。雪莲薯原汁可有效促进双歧杆菌的生长,10%(m/m)添加量可使双歧杆菌生长量增加53%,20%(m/m)添加量对大肠杆菌有一定抑制作用。

关键词: 雪莲薯, 漂烫, 酶解, 双歧杆菌, 大肠杆菌

Abstract:

A process comprising the steps of selection, cleaning, cutting, blanching, breaking, cellulase hydrolysis, squeezing, pectinase hydrolysis and sterilization was designed for yacon juice processing. The optimum blanching temperature and length of blanching time were 100 ℃ and 2.5 min, respectively. According to the orthogonal array optimization, an optimum juice percentage of yacon was achieved by the hydrolysis at 50 ℃ and pH 5 for 45 min with added cellulase at 0.08%. The optimum pectinase amount for improved clarity of yacon juice was 0.14%. Yacon juice obviously promoted the growth of Bifidobacterium, resulted in 53% increase of Bifidobacterium biomass at 10% addition level, but had an inhibitory effect on the growth of Escherichia coli.

Key words: yacon juice, blanching, emzymatic hydrolysis, Bifidobacterium, Escherichia coli

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