Mathematical modelling of moisture sorption isotherms and determination of isosteric heat of blueberry variety O′Neil

2009 ◽  
Vol 44 (10) ◽  
pp. 2033-2041 ◽  
Author(s):  
Antonio Vega-Gálvez ◽  
Jessica López ◽  
Margarita Miranda ◽  
Karina Di Scala ◽  
Francisco Yagnam ◽  
...  
Keyword(s):  
Mathematical Modelling ◽  
Sorption Isotherms ◽  
Moisture Sorption ◽  
Isosteric Heat ◽  
Moisture Sorption Isotherms

Determination of the Moisture-Sorption Isotherms and Isosteric Heat of Henna Leaves

2015 ◽  
Vol 88 (1) ◽  
pp. 52-62 ◽  
Author(s):  
S. Bennaceur ◽  
B. Draoui ◽  
B. Touati ◽  
A. Benseddik ◽  
A. Saad ◽  
...  
Keyword(s):  
Sorption Isotherms ◽  
Moisture Sorption ◽  
Isosteric Heat ◽  
Moisture Sorption Isotherms

scholarly journals Beta-glucan rich composite flour biscuits: modelling of moisture sorption isotherms and determination of sorption heat

2014 ◽  
Vol 52 (9) ◽  
pp. 5497-5509 ◽  
Author(s):  
Narender Raju Panjagari ◽  
Ashish Kumar Singh ◽  
Sangita Ganguly ◽  
Kangampalayam Palaniswamy Indumati
Keyword(s):  
Sorption Isotherms ◽  
Moisture Sorption ◽  
Composite Flour ◽  
Beta Glucan ◽  
Moisture Sorption Isotherms ◽  
Sorption Heat

Moisture Sorption Isotherms and Net Isosteric Heats of Sorption of Green Soybean

2012 ◽  
Vol 8 (3) ◽  
Author(s):  
Zhao Yang ◽  
Enlong Zhu ◽  
Zongsheng Zhu
Keyword(s):  
Moisture Content ◽  
Equilibrium Moisture Content ◽  
Sorption Capacity ◽  
Water Activity ◽  
Sorption Isotherms ◽  
Moisture Sorption ◽  
Isosteric Heat ◽  
Model Parameters ◽  
Desorption Process ◽  
Moisture Sorption Isotherms

Abstract Moisture sorption isotherms of green soybean seeds were determined by static gravimetric method and water activity ranging from 0.11to 0.94 at 20, 30 and 40°C. The optimal sorption model of green soybean was determined by using nonlinear regression method. Modified BET multilayer sorption theory model parameters at different temperatures were calculated, isosteric sorption heat was derived by the water activity sorption isosteric model. Results indicated that sorption isotherms were belong to type III behaviour, a notable hysteresis effect was observed, Green soybean monolayer saturated sorption capacity was greater in desorption process than that of adsorption. The monolayer saturated sorption capacity decreased with increasing temperature, while the number of multilayer had a reverse trend with the monolayer saturated sorption capacity, the optimal sorption isotherm model for green soybean is Halsey model, The thermodynamic parameters including net isosteric heat of adsorption and desorption calculated at 40°C were 105.2-1865.4 kJ/kg and 111.62-1939.0 kJ/kg with equilibrium moisture content between 5% and 32% (d.b.), respectively. The net isosteric heat of sorption decreased with increasing equilibrium moisture content.

Moisture Sorption Isotherms and Thermodynamic Properties of Carrot

2011 ◽  
Vol 7 (3) ◽  
Author(s):  
Valeria S. Eim ◽  
Carmen Rosselló ◽  
Antoni Femenia ◽  
Susana Simal
Keyword(s):  
Moisture Content ◽  
Dry Matter ◽  
Sorption Isotherms ◽  
Moisture Sorption ◽  
Isosteric Heat ◽  
Nonlinear Regression Analysis ◽  
Mean Relative Error ◽  
Moisture Sorption Isotherms ◽  
Different Temperatures ◽  
Water Sorption Isotherms

The water sorption isotherms of carrot were determined at five different temperatures (at 10, 20, 30, 40 and 50ºC) within wide ranges of moisture content (1.3-78.4 kg water /100 kg dry matter) and water activities (0.165-0.907) by using a standardized conductivity thermohygrometer. The sorption isotherms exhibited the type III behaviour, thus, an increase in temperature promoted a decrease in water activity. The GAB, Halsey, Henderson, Iglesias & Chirife and Oswin models were tested to fit the experimental data by using nonlinear regression analysis. The GAB and Henderson models satisfactorily described the sorption isotherms (mean relative error < 5.6%). The net isosteric heat of sorption (Qstn) and the differential entropy (Sd), estimated as functions of the moisture content, decreased as the carrot moisture content increased.

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