TY - JOUR
T1 - Effect of CO2 flow rate on enzyme inactivation by continuous method with microbubbles of supercritical carbon dioxide
AU - Yoshimura, Takashi
AU - Shimoda, Mitsuya
AU - Ishikawa, Hiroya
AU - Miyake, Masaki
AU - Matsumoto, Kiyoshi
AU - Osajima, Yutaka
AU - Hayakawa, Isao
PY - 2002/10
Y1 - 2002/10
N2 - In our previous papers, batch treatment with microbubbles of supercritical carbon dioxide (SC-CO2) was established as an alternative method to heat treatment. For adapting to food industry, continuous system with microbubbles of SC-CO2 was designed and constructed. In continuous system, there are new factors affecting inactivation efficiency of microbubbles SC-CO2 treatment. In this paper, effect of CO2 flow rate on enzyme inactivation by continuous method with microbubbles of SC-CO2 was investigated. Dissolved CO2 concentration, which played an important role for enzyme inactivation by microbubbles SC-CO2 treatment, was enhanced depending on CO2 flow rate. Also, it was observed that pH of deionized water was lowered to below 3 during the treatment, α -amylase, which was thermoresistant enzyme, was easily inactivated at low CO2 flow rate because of temporary lowering of pH. On the other hand, inactivation efficiency of acid protease, which was acid-resistant enzyme, was increased depending on CO2 flow rate.
AB - In our previous papers, batch treatment with microbubbles of supercritical carbon dioxide (SC-CO2) was established as an alternative method to heat treatment. For adapting to food industry, continuous system with microbubbles of SC-CO2 was designed and constructed. In continuous system, there are new factors affecting inactivation efficiency of microbubbles SC-CO2 treatment. In this paper, effect of CO2 flow rate on enzyme inactivation by continuous method with microbubbles of SC-CO2 was investigated. Dissolved CO2 concentration, which played an important role for enzyme inactivation by microbubbles SC-CO2 treatment, was enhanced depending on CO2 flow rate. Also, it was observed that pH of deionized water was lowered to below 3 during the treatment, α -amylase, which was thermoresistant enzyme, was easily inactivated at low CO2 flow rate because of temporary lowering of pH. On the other hand, inactivation efficiency of acid protease, which was acid-resistant enzyme, was increased depending on CO2 flow rate.
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U2 - 10.5109/24448
DO - 10.5109/24448
M3 - Article
AN - SCOPUS:0036342952
SN - 0023-6152
VL - 46
SP - 345
EP - 352
JO - Journal of the Faculty of Agriculture, Kyushu University
JF - Journal of the Faculty of Agriculture, Kyushu University
IS - 2
ER -