Journal of South China University of Technology (Natural Science Edition) ›› 2006, Vol. 34 ›› Issue (3): 101-105.

• Biological Engineering • Previous Articles     Next Articles

Dilatational Properties of Soy 11 S Globulin Adsorption Films on Air-Water Interface

Zhou Chun-xia  Wen Qi-biao  Yang Xiao-quan   

  1. Research and Development Center of Food Proteins,South China Univ.of Tech.,Guangzhou 510640,Guangdong,China
  • Received:2005-06-17 Online:2006-03-25 Published:2006-03-25
  • Contact: 周春霞(1979-)，女，博士生，主要从事蛋白质化学与工程研究 E-mail:chunxia.zhou@163.com
  • About author:周春霞(1979-)，女，博士生，主要从事蛋白质化学与工程研究
  • Supported by:

    广东省“十五”攻关农产品加工重大专项项目(A20301)

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Abstract:

The variation of surface dilatational characteristic parameters with adsorption time for soy 11 S globulin adsorption films on air-water interface was measured by the axisymmetfic drop-shape analysis,aft a function of pro-tein concentration and pH value in the bulk phase.The results indicate that,with the increase of adsorption time,the surface dilatational modulus increases,while the phase angle decreases.Moreover,the dilatational elasticity of the soy 11 S globulin films adsorbed on air-water interface is greater than the dilatational viscosity.Thus,in view of rheology,the viscoelastic adsorption films are practically elastic.In addition,the surface dilatational modulus increases with the bulk protein concentration,especially depends on the pH value

Key words: soy 11 S globulin, air-water interface, adsorption film, dilatational property, axisymmetric drop-shape analysi