Change in density of Japanese radish cylinders immersed in NaCl solution and its mathematical model

Changes in volume, weight and density of Japanese radish cylinders were fol lowed during 7-day incubation at various temperatures in NaCl solutions ran ging in concentration from 0.43 to 1.83 mol/ l. Upon immersion of the cylin ders, there was a sharp initial decrease followed by a gradual increase bot h in volume and weight; in contrast, the density of the cylinders increased initially to a maximum, and then decreased slowly. These observations show ed that changes in volume, weight and density of the samples were dependent on both temperature and concentration of NaCl solution. These results were expressed using mathematical models with three parameters. The calculated values from a proposed mathematical model for volumetric change agreed well with the experimental values. The weight change determined in the experime nt was also fitted well to the calculated values from a mathematical model similar to that for the volumetric change. In addition, it was found that t he density calculated from both of the mathematical models for volume and w eight changes mentioned above was also fitted well to the experimental resu lts.