TEMPERATURE-CHANGES OF KAMABOKO ACCOMPANIED BY STRETCHING

The structure of elastic appearance of kamaboko was discussed by the t hermodynamic theory of elastic deformation. The thermistor was inserte d into kamaboko sample gels, and the temperature was measured as the g els were stretched at the rate of 20 cm/min. As a result, the temperat ure of the sample gels decreased right after the temperature increased . However, it is unlikely that a rapid variation of temperature of kam aboko occures in the atmosphere, because kamaboko will have almost the same magnitude of specific heat with that of water, and the cause for the temperature increase and decrease were examined. The increase in temperature when the sample gels were stretched was explained by the t emperature distribution within the gels being low and high temperature s at the middle part and surface of the gels, respectively. On the oth er hand, the temperature decrease right after the temperature rise was likely caused by the heat of moisture vaporization when the surface a rea of the samples were expanded accompanied by stretching. The factor s for temperature changes in kamaboko when it is stretched can be expl ained by factors other than the Cough-Joule effect. Therefore, it is n ot enough to conclude that kamaboko has an entropy elastic body only b y the results from the apparent temperature increase.