Rice (Oryza sativa L.) provides a considerable amount of the foodborne energy in the worldwide, especially Asian countries such as China, India, Indonesia etc., and therefore, it is a main food product for more than half of the global population (Liang et al., 2007; Tao et al., 2019). When the rice is harvested, it is in the form of paddy composed from the husk (20%), bran and germ (8%-12%), and endosperm (70%-72%). It is procured the brown rice with separating of the husk. If the brown rice is processed further and the bran and germ layers are removed, the white rice is obtained (Gujral
The aim of this research was to determine the adsorption behavior of coffee as green and roasted beans and ground. For this aim, the static gravimetric method was used and samples were kept in the different water activity levels between 0.01 and 0.91 at 25°C for 7 days. The data were evaluated using the BET (Brunauer‐Emmett‐Teller), GAB (Guggenheim, Anderson and deBoer), Halsey, and Peleg sorption equations. The constants m0 and C of BET and GAB equations were determined to be between 2.13 and 6.61 g water/100 g of dry matter and 30.05–429.60, respectively. The isotherms of all coffee samples were defined as Type II because the C constant of the GAB equation was higher than 2. Additionally; the BET, GAB, and Peleg equations were determined to fit better than the Halsey for adsorption properties of coffee because E% values were lower than 10% and the coefficient of regression values approached the 1.00.
Practical applications
The obtained results with that research could be useful for understanding the physicochemical relationship between water and dry matter of coffee. Because this relationship is quite important in foods that have easily changing characteristics and quality like coffee, and determination of their sorption characteristics ensures maintaining the physical, chemical, biochemical, and microbiological quality stability of food during processing, packaging, and storage.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.