Effect of konjac gum on pasting and rheological properties of lotus root starch
In order to explore the effect of hydrophilic colloid on properties of starch,the pasting,rheological,textural properties and microstructure of lotus root starch by adding konjac gum were investigated.The results showed that the viscosity,setback and breakdown values of lotus root starch were improved.The mixed system was pseudoplastic fluid,the consistency coefficient K was increased but the fluid index n was decreased,the mixed system exhibited a more significant thickening effect.The viscosity ratio was increased after adding konjac gum,the mixed systems had excellent visco-elastic characteristic,konjac gum accelerated the retrodegradation of lotus root starch.The hardness,elasticity and cohesion of starch mixed systems were decreased,but the adhesion of the mixed systems was increased;when the lotus root starch and konjac gum mass ratio was 8.5∶ 1.5,the gel was the softest.Meanwhile,a more uniform and compact network structure was observed by scanning electron microscopy.
国家科技期刊平台
NSTL
万方数据
维普
