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Flow characteristics and gelatinization kinetics of rice starch under strong alkali conditions | | H. Yamamoto
; E. Makita
; Y. Oki
; M. Otani
; | | Date: |
25 Dec 2004 | | Subject: | Biological Physics; Chemical Physics | physics.bio-ph physics.chem-ph | | Abstract: | The normality dependence and the kinetics of flow behavior in the rice starch dispersion under strong alkali conditions were studied. Non-Newtonian flow (power-law) quantities n and mu (sigma=mu(dotepsilon)^n; sigma: shear stress, dotepsilon: shear rate) of the samples stored (gelatinized) at 20^{circ}C for 10min after the addition of NaOH solution with the normality 0.090 - 0.175N, were measured by a cone-plate type rotational viscometer. For the flow analysis a care was taken for the ambiguity of the analysis range of flow data. The samples added with 0.14 - 0.16N NaOH displayed an apparently dilatant flow. As the normality of added NaOH increased, apparent viscosity eta_a was steeply enhanced in the vicinity of 0.14N and started to grow almost exponentially. Next, the storage time dependence of flow properties was investigated for samples gelatinized for 6 | | Source: | arXiv, physics/0412161 | | Services: | Forum | Review | PDF | Favorites | |
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