Betel Nut

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REVIEW OF RELATED STUDIES AND LITERATURE
Related Literature
Potato
Potatoes (Solanum tuberosum) are tubers. A tuber is a fleshy, food-storing swelling at the tip of an underground stem, also called a stolon. Potatoes have white, brown, purple or red skin and white or golden flesh. Potatoes grow from eyes which are pieces cut from seed potatoes. As potatoes grow they must be hilled when the plants are 20 to 30cm high. Hilling is done by covering the base of the plant with soil to prevent the potatoes from exposure to light which causes them to turn green. Before harvesting, potato vines are killed to allow the skin to set. A mechanical harvester is used to pick the potatoes. Potatoes need to be harvested at certain temperatures to maximize the length of time they can be stored.

Nutritional Facts
Serving Size: 1 medium potato (148g) %= Daily Value*Percent Daily Values are based on a 2,000-calorie diet. 

Calories 100 
Calories from Fat 0 
Total Fat 0g 0% 
Saturated Fat 0g 0% 
Cholesterol 0mg 0% 
Sodium 0mg 0% 
Total Carbohydrate 26g 9% 
Dietary Fibre 3g 12% 
Sugars 3g 
Protein 4g 
Vitamin A 0% 
Vitamin C 45% 
Calcium 2% 
Iron 6% 

(http://www.browfarm.co.uk/potatoes_about.htm)
Battery
A battery, which is actually an electric cell, is a device that produces electricity from a chemical reaction. Strictly speaking, a battery consists of two or more cells connected in series or parallel, but the term is generally used for a single cell. A cell consists of a negative electrode; an electrolyte, which conducts ions; a separator, also an ion conductor; and a positive electrode. The electrolyte may be aqueous (composed of water) or nonaqueous (not composed of water), in liquid, paste, or solid form. When the cell is connected to an external load, or device to be powered, the negative electrode supplies a current of electrons that flow through the load and are accepted by the positive electrode. When the external load is removed the reaction...
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