4. The vegetables and 3 species, namely, coriander, lettuce, and thyme. Soak into prepared pan for 15 minutes.5. The vegetables from the tray. Drain and set the left in the prepared pan. Start the clock.6. Observe and record the change of vegetables and 3 type by shooting all tray taken since the start of ตั้งทิ้งไว้ 2 hours, 4 hours, 6 hours. And the 24 hours respectively.7. Experiment items 1 - 6 again by changing the chitosan is 5 10 15 20,,, mL. And water 1000 mL.
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