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Prostaglandins were first isolated from human semen in Sweden in the 1930s. They were so named because the researcher thought that they came from the prostate gland. In fact, prostaglandins exist and are synthesized in almost every cell of the body.
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In 1864, the first barbiturate (barbituric acid) was synthesized.
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Approximately one in three babies in the United States is now delivered by cesarean section. The number of cesarean sections in the United States has risen 46% since 1996.
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There can actually be a 25-hour time difference between certain locations in the world. The International Date Line passes between the islands of Samoa and American Samoa. It is not a straight line, but "zig-zags" around various island chains. Therefore, Samoa and nearby islands have one date, while American Samoa and nearby islands are one day behind. Daylight saving time is used in some islands, but not in others—further shifting the hours out of sync with natural time.
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The most common childhood diseases include croup, chickenpox, ear infections, flu, pneumonia, ringworm, respiratory syncytial virus, scabies, head lice, and asthma.
Some mangrove islands in the Florida Keys, which number in the thousands, are convenient places to t
Factors Affecting Body Temperature
Factors for Tolerance Intervals
Factors Affecting the Affinity of Hb for O2
In the Florida lottery, the numbers (between 1 and 49) are generated randomly with the ...
Formation of a DNA loop allows factors that bind to an enhancer or silencer