* tools used in the Research
1. Stevia leaf 150 G
2. sweet Lettuce 150 G
3. sugar cane 150 G
4. water 800 ml
5. beaker 400 ml (6)
6. stirring rod 1
7 . ethanol 1 bottles
8. Straining cloth
9. knife 1
10. the Freud 6
11. Rubber tires 6
12.Measure of sweet. Hand Refractometer
13.Dropper 1
14. blender 1