Study on equilibrium moisture sorption characteristics and modeling of Karaya (Sterculia urens Roxb.) gum

Abstract

Attempts were made to demonstrate the critical observations for up to 3 weeks at 50 °C temperature and an experimental range of water activity conditions (Fig. 2). It is well demonstrated that there were no typical changes observed in karaya gum samples during the study. In this research, five sorption models were taken to fit the sorption data as given in Table 2. The moisture sorption isotherm of karaya gum at different experimental temperatures within a water activity range of 0.10–0.95 is presented in Fig. 3. The model parameters of moisture sorption and their goodness of fit constants obtained in this experiment are presented in Table 3. A comparison of experimental and predicted sorption isotherm of karaya gum using the GAB model is depicted in Fig. 4. The monolayer moisture content of karaya gum was found and presented