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Water sorption isotherms of leaves and stems of Trifolium pratense L.
Author(s) -
Stencl,
Homola
Publication year - 2000
Publication title -
grass and forage science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.716
H-Index - 56
eISSN - 1365-2494
pISSN - 0142-5242
DOI - 10.1046/j.1365-2494.2000.00209.x
Subject(s) - sorption , desorption , gravimetric analysis , adsorption , water activity , moisture , equilibrium moisture content , red clover , water content , chemistry , botany , horticulture , biology , geology , organic chemistry , geotechnical engineering
Moisture sorption isotherms of red clover, Trifolium pratense L., leaves and stems from the first cut of the season were determined using a gravimetric dynamic method with continuous recording of changes in sample weight. Equilibrium data for adsorption and desorption of water from red clover were investigated at ambient temperatures in the range of 20–50°C and with water activity in the range of 0·20–0·99. Sorption capacity decreased as temperature increased. Rehydration of the dried material resulted in hysteresis. Four models available in the literature (Chung‐Pfost, Halsey, Henderson and Oswin) were evaluated by determining the best fit to the experimental data. The Henderson equation was found to be a good model for moisture adsorption and desorption of leaves, and the Oswin equation was a good model for moisture adsorption and desorption of stems.