To visually illustrate the structural thermal stability of
irradiated gelatin-glucose, samples were stained after hydration
with a red food coloring dye and placed in an 85∘C
water bath for 30 minutes. As seen in Figures 3(a) and 3(b),
the nonirradiated samples were no longer visible, having
dissolved completely within 1 minute. The stable physical
structure of the irradiated samples is shown in Figures 3(c)
and 3(d) and did not change after 30 minutes of immersion.