Abstract
Native ovalbumin (OA) molecules in aqueous colloids are more stable in an ordered arrangement state than in a random dispersion state. Rate of the stabilization from the random dispersion state to the ordered arrangement state is extremely accelerated by shear flow. Isotropic colloids of native OA molecules in buffer solutions show a remarkable yield stress σy and a rigidity G even in very dilute systems such as 0.027 wt. %. The values of σy and G remain almost constant over a wide concentration range from 0.1% to 17%. This suggests that the systems are spontaneously controlled (auto‐controlled) in order to suppress the increase in σy and G with increasing concentration of OA. This auto‐controlled mechanism disappears completely with gelation by heat denaturation.
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