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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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This year, an estimated 1.4 million Americans will have a new or recurrent heart attack.
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In 1835 it was discovered that a disease of silkworms known as muscardine could be transferred from one silkworm to another, and was caused by a fungus.
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Historic treatments for rheumatoid arthritis have included gold salts, acupuncture, a diet consisting of apples or rhubarb, nutmeg, nettles, bee venom, bracelets made of copper, prayer, rest, tooth extractions, fasting, honey, vitamins, insulin, snow collected on Christmas, magnets, and electric convulsion therapy.
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There used to be a metric calendar, as well as metric clocks. The metric calendar, or "French Republican Calendar" divided the year into 12 months, but each month was divided into three 10-day weeks. Each day had 10 decimal hours. Each hour had 100 decimal minutes. Due to lack of popularity, the metric clocks and calendars were ended in 1795, three years after they had been first marketed.
Structure of a Cell
bacterial cell
Single blood cell
In 1879 an army officer founded the Carlisle School in Pennsylvania to “civilize” young Indians. The
Steps in the humoral and cell-mediated immune responses.
Reed-Sternberg cells: Bilobed nucleus coupled with the prominent nucleoli gives this cell the ...