The primary IGT was washed by deionized water and dried in
sunlight; after thatit wasmilled and sieved. The density value ofIGT
was 1/42 g/cm3. The 4 g of IGT was dissolved in deionized water and
homogenized on the magnetic stirring overnight and then allowed
to stay for 12 h at room temperature. The mucilage was filtrated and
separated through a glass funnel. The obtained clear solution was
dried through freeze-drying, and weighted and stored. A schematic
of the whole process to prepare IGT is shown in Fig. 1.