The GAB model also offers valuable information on
the moisture content of the monomolecular layer (xo),
a parameter essential to define storage food conditions
(Table 2). The xo indicates the amount of water that is
strongly adsorbed in the active sites of the solid phase
surface of foods and it is considered to be the moisture
content where a given food exhibits its best stability
during storage. The xo calculated with the GAB model
dropped from 0.0602 to 0.0252 g water/g dry matter,
with increasing temperatures. Similar results were found
in the adsorption isotherms of fruits such as loquat
and quince [35], and pine seeds [36]. The negative
relationship between xo and temperature is probably
a consequence of damage of the active union points
between water molecules and the solid phase surface of
the food material, resulting in the detachment of water
molecules and therefore in water loss as temperature
increases. Moreira (2008) [35], and AviaraandAjibola
(2002) [37] stated that when temperature increases, the
active points on the food surface are reduced as a result
of chemical and physical changes.