Time ( h )
0 5 10 15 20 25 30
Degree of swelling ( % )
0 1000 2000 3000 4000 5000 6000 7000 8000 9000
pH2, MW 4 X 104 pH2, MW 3.6 X 105 pH7, MW 4 X 104 pH7, MW 3.6 X 105
Time ( h )
0 5 10 15 20 25 30
Degree of swelling ( % )
0 10000 20000 30000 40000 50000
pH2, PVP:Soluble chitosan=9:1 pH7, PVP:Soluble chitosan=9:1 pH2, PVP:Soluble chitosan=7:3 pH7, PVP:Soluble chitosan=7:3 pH2, PVP:Soluble chitosan=5:5 pH7, PVP:Soluble chitosan=5:5
Time ( h )
0 5 10 15 20 25 30
Degree of swelling ( % )
0 2000 4000 6000 8000 10000 12000
pH2, 10 kGy pH2, 70 kGy pH7, 10 kGy pH7, 70 kGy
Time ( min )
0 20 40 60 80 100 120 140 160 180
Release ratio ( % )
0 20 40 60 80 100
SGF, MW 4 X 104 SIF, MW 4 X 104 SGF, MW 3.6 X 105 SIF, MW 3.6 X 105
Time ( min )
0 20 40 60 80 100 120 140 160 180
Release ratio ( % )
0 20 40 60 80 100
SGF, MW 4 X 104 SIF, MW 4 X 104 SGF, MW 3.6 X 105 SIF, MW 3.6 X 105
Time ( min )
0 20 40 60 80 100 120 140 160 180
Release ratio ( % )
0 20 40 60 80 100
SGF, PVP:Soluble chitosan=9:1 SIF, PVP:Soluble chitosan=9:1 SGF, PVP:Soluble chitosan=7:3 SIF, PVP:Soluble chitosan=7:3 SGF, PVP:Soluble chitosan=5:5 SIF, PVP:Soluble chitosan=5:5
Time ( min )
0 20 40 60 80 100 120 140 160 180
Release ratio ( % )
0 20 40 60 80 100
SGF, PVP:Soluble chitosan=9:1 SIF, PVP:Soluble chitosan=9:1 SGF, PVP:Soluble chitosan=7:3 SIF, PVP:Soluble chitosan=7:3 SGF, PVP:Soluble chitosan=5:5 SIF, PVP:Soluble chitosan=5:5
Time ( min )
0 20 40 60 80 100 120 140 160 180
Release ratio ( % )
0 20 40 60 80 100
SGF, 10 kGy SIF, 10 kGy SGF, 70 kGy SIF, 70 kGy
Time ( min )
0 20 40 60 80 100 120 140 160 180
Release ratio ( % )
0 20 40 60 80 100
SGF, 10 kGy SIF, 10 kGy SGF, 70 kGy SIF, 70 kGy