The gelation and gel-melting processes have been investigated by time-resolved dynamic light scattering for gelatin aqueous solutions (1) during both cooling and heating processes with a fixed rate (0.10 °C/min) and (2) after quenching from 50 to 10 °C. In both cases, the gelation threshold was clearly observed as (i) appearance of strong fluctuations in scattered intensity, (ii) a power-law behavior in the time−intensity correlation function (ICF), and (iii) deviation of the initial amplitude of ICF. The physical implication of these phenomena is discussed.
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Okamoto et al. (2001) studied this question.
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