As many as 20% of Americans have been infected by the fungus known as Histoplasmosis. While most people are asymptomatic or only have slight symptoms, infection can progress to a rapid and potentially fatal superinfection.
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In 1864, the first barbiturate (barbituric acid) was synthesized.
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Although puberty usually occurs in the early teenage years, the world's youngest parents were two Chinese children who had their first baby when they were 8 and 9 years of age.
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Asthma cases in Americans are about 75% higher today than they were in 1980.
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The first war in which wide-scale use of anesthetics occurred was the Civil War, and 80% of all wounds were in the extremities.
Noll's DNase-I digestion experiment, which verified the beads-on-a-string model of DNA compacti
The b sheet, another common secondary structure in proteins
The sequence and postulated structure of glycophorin A