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Desorption Isotherms of Rough Rice from 10 C to 40 C
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1979
Year
Precision AgricultureEnvironmental MonitoringEngineeringSoil SalinityFood AnalysisAgricultural EconomicsSample BasketGrain QualityCrop QualityFood ChemistryChemical EngineeringDesorption IsothermsBioremediationEmc DataHealth SciencesChung-pfost EquationsRough RiceFood QualityFood SafetyEnvironmental EngineeringWater PurificationGrain Storage
ABSTRACT EQUILIBRIUM moisture contents (EMC) for smooth-hulled medium grain rice variety (M5) were deter-mined at 10, 20, 25, 30 and 40 C and relative humidities ranging from 11.2 to 92.5 percent. A static method of equilibrium was used by suspending 16 g of samples in one quart wide-mouth jars with 200 ml of different saturated salt solutions. Triplicated samples were used for all trials. Data obtained at relative humidities of 90 percent and higher were erroneous due to condensa-tion on the samples and corrosion of sample basket. A new empirical equation was proposed to correlate the EMC data and compared with Day-Nelson and Chung-Pfost equations. Root Mean Square Error (RMSE) and Analysis of Variance (ANOVA) tests were performed to evaluate the goodness of fit of the data by the differ-ent equations. The ANOVA test showed that there was no difference among Day-Nelson, Chung-Pfost and the new empirical equation. Either one could be used to predict the EMC data.