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The horizontal fraction bar was introduced by the Arabs.
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Drying your hands with a paper towel will reduce the bacterial count on your hands by 45–60%.
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Nitroglycerin is used to alleviate various heart-related conditions, and it is also the chief component of dynamite (but mixed in a solid clay base to stabilize it).
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More than 2,500 barbiturates have been synthesized. At the height of their popularity, about 50 were marketed for human use.
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The B-complex vitamins and vitamin C are not stored in the body and must be replaced each day.