Experimental study methodsComparison of concentration of chitosan.1. Measure chitosan using cylinder size 10 mL. In volume 1mL. And prepare the water using a beaker size 500 mL. In the circle.2. Bring water is prepared from the beaker put into trays to the volume 1000 mL.3. The chitosan which is measured and 1mL. Put down the tray with a water 1000 mL.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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