The first-known contraceptive was crocodile dung, used in Egypt in 2000 BC. Condoms were also reportedly used, made of animal bladders or intestines.
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About 3.2 billion people, nearly half the world population, are at risk for malaria. In 2015, there are about 214 million malaria cases and an estimated 438,000 malaria deaths.
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The heart is located in the center of the chest, with part of it tipped slightly so that it taps against the left side of the chest.
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Between 1999 and 2012, American adults with high total cholesterol decreased from 18.3% to 12.9%
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Street names for barbiturates include reds, red devils, yellow jackets, blue heavens, Christmas trees, and rainbows. They are commonly referred to as downers.
Examples of fatty acids
Amino Acid Structure
Nucleic acids.
Amino Acid carbon skeleton
The dissociation equilibrium constants for the protonated form of alanine (a diprotic amino ...