- 著者
- Takenobu OGAWA Shuji ADACHI
- 出版者
- Japan Society for Bioscience, Biotechnology, and Agrochemistry
- 雑誌
- Bioscience, Biotechnology, and Biochemistry (ISSN:09168451)
- 巻号頁・発行日
- vol.77, no.2, pp.249-252, 2013-02-23 (Released:2013-02-23)
- 参考文献数
- 14
- 被引用文献数
- 15
The water sorption kinetics of dried pasta were measured in the 20–90 °C range in 1.83 mol/L of NaCl and at 80 °C in 1.83 mol/L of LiCl, KCl, NaBr and NaI solutions in order to elucidate the role of salt in the kinetics. At the temperatures higher than 70.8 °C, the change in the enthalpy of sorption, ΔH, in the 1.83 mol/L NaCl solution was 33.1 kJ/mol, which was greater than the ΔH value in water, and the activation energy for the sorption, E, in the salt solution was 25.6 kJ/mol, which was slightly lower than the E value in water. The Hofmeister series of ions was an index for their effect on the equilibrium amount of the sorbed solution of pasta. The apparent diffusion coefficient of water into pasta was not correlated with the crystal radius of the salts, but was with the Stokes radius of the hydrated ions. Equations were formulated to predict the amount of sorbed solution under any condition of temperature and NaCl concentration.
- 著者
- Shuji Adachi Takenobu Ogawa
- 出版者
- Japanese Society for Food Science and Technology
- 雑誌
- Food Science and Technology Research (ISSN:13446606)
- 巻号頁・発行日
- pp.FSTR-D-23-00148, (Released:2023-10-03)
A novel method is proposed to estimate the equilibrium moisture content Xe at a specific temperature using the change over time in moisture content during cooking of spaghetti at different rates of temperature increase. In this method, the moisture content XvT→0 at infinitely slow heating is the equilibrium moisture content Xe at that temperature, based on the relationship between the average rate of temperature increase vT in reaching a certain temperature and the moisture content X. Xe estimated by the proposed method was almost consistent with the equilibrium moisture content estimated from the change in moisture content over time at a constant temperature, and the validity of the proposed method was verified.