Biotechnology Bulletin ›› 2021, Vol. 37 ›› Issue (11): 178-189.doi: 10.13560/j.cnki.biotech.bull.1985.2021-0634

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Study on the Rheological Properties of the Mixtures with Tremella fuciformis Gum

CHEN Jian-qiu(), HUANG Sheng, ZHAO Wei-chao, ZHAN Guan-ping, SUN Shu-jing(), CHEN Li-ding()   

  1. College of Life Sciences,Fujian Agriculture and Forestry University,Fuzhou 350002
  • Received:2021-05-17 Online:2021-11-26 Published:2021-12-03
  • Contact: SUN Shu-jing,CHEN Li-ding E-mail:664877349@qq.com;shjsun2004@126.com;bioengin2021@163.com

Abstract:

Tremella fuciformis gum(TFG),used as new food additives,is prepared by a simple leaching process with T. fuciformis polysaccharides as its main component. The two kinds of new complex gum solutions of xanthan gum-T. fuciformis gum(XG-TFG)and guar gum-T. fuciformis gum(GG-TFG)were prepared with different ratios. The apparent viscosities and rheological properties of the complex gum solutions and two single colloids(XG and GG)were analyzed under different physiochemical conditions. And the sensory evaluations of yogurt samples were also compared with addition of different proportion of the complex gums. The results showed that the apparent viscosities of all the colloids increased non-linearly with the increase of colloidal concentration. The apparent viscosity of the complex gums were affected less than that of the single gum by the ion types and ionic concentration. Furthermore,the apparent viscosities of the complex gums were steady in the weak acid and weak base,but decreased with the increasing heating time at a lower temperature. The decrease of the apparent viscosity caused by adding sugar(low concentration)or μLtrasonic treatment was eliminated by adding TFG. The apparent viscosities of all colloids were stable with freeze-thaw treatments. The results of rheological test confirmed that the solutions of the complex gums were pseudoplastic fluids with excellent in-shear stuctural recovery. The complex gum with the ratio 1:1 of GG to TFG was the best formula of flavor to yogurt,indicating that the texture and flavor of yogurt was improved by adding complex gum in the proper ratio. The above results will provide the theoretical basis and the applications the complex gums prepared from TFG and other colloids.

Key words: Tremella fuciformis gum, complex gum, apparent viscosity, rheological properties, sensory evaluation