Lynne Wong's PhD thesis

Thus, for each cane component of each age, the values of ln b and ln c found for the four
temperatures were each plotted against 1/T, and the slopes and the intercepts of the two
graphs provided solutions to the values of b o , c o , H 1 and H m .
The data for reconstituted cane stalk, dry leaf and green leaf of R 570 aged 52 and 36
weeks were similarly treated. The results obtained are shown in Table 6.3.
The heat of sorption of multilayer H m for each particular fibre is systematically higher at 52
weeks (48 – 49 kJ mol -1 ) than at 36 weeks (46 – 47 kJ mol -1 ), whereas the heat of sorption
of monolayer H 1 is variable as is the constant b o , the constant c o is also systematically
higher at 52 weeks than at 36 weeks for each particular fibre.
For values of b o , c o , H 1 – H m and H L – H m , Lopes Filho et al., (2002) found for alligator’s
meat, 38980, 9.10, 5.42 kJ mol -1 and –5.96 kJ mol -1 , Arslan and Toğrul (2005) found for
macaroni, values of 0.026, 0.617, 13.50 kJ mol -1 and 0.752 kJ mol -1 , and Al-Muhtaseb et
al. (2004a) reported for amylopectin powder 0.014, 0.716, 16.9 kJ mol -1 and 617 kJ mol -1 .
None of these authors reported individual values of H 1 , H L and H m .
Table 6.3. Heat of sorption of the monolayer H 1 (kJ mol -1 ) and multilayer H m (kJ mol -1 )
for the nine cane components and reconstituted cane stalk and leaves of R 570 of two ages.
Sample 52 weeks 36 weeks
b o c o H 1 H m b o c o H 1 H m
Stalk fibre 0.4418 4.518 57.42 49.07 4.771 x 10 -6 1.236 84.74 45.56
Stalk pith 1.73 x 10 -19 2.263 172.2 47.09 3.309 x 10 9 2.602 -1.969 47.48
Rind fibre 0.169653 5.963 60.17 49.83 2.395 x 10 -9 1.982 106.8 46.92
Rind fines 248.1 2.172 39.58 47.13 0.0486 1.150 60.17 45.48
Top fibre 0.0252 3.487 65.58 48.26 1609.2 3.557 35.72 48.31
Dry leaf fibre 0.1485 3.732 61.15 48.49 2864773.9 3.249 17.56 48.08
Dry leaf fines 38832.003 7.859 29.92 50.56 3.52 x 10 -6 1.284 85.44 45.72
Green leaf fibre 293386086 3.369 3.782 48.24 0.000331 1.284 74.52 45.72
Green leaf fines 1.688 2.714 53.58 47.59 2.216 x 10 -5 2.569 84.25 47.43
Reconstituted cane 54.10 3.411 45.88 48.26 0.0111 1.949 67.21 46.78
Reconstituted dry leaf 8.28 x 10 72 6.089 -366.7 49.81 8.87 x 10 57 2.598 -283.4 47.49
Reconstituted green leaf 4.512 x 10 98 2.394 -548.9 47.26 2.692 x 10 39 2.958 -175.8 47.80
b o and c o are constants.
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