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In 1886, William Bates reported on the discovery of a substance produced by the adrenal gland that turned out to be epinephrine (adrenaline). In 1904, this drug was first artificially synthesized by Friedrich Stolz.
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Of the estimated 2 million heroin users in the United States, 600,000–800,000 are considered hardcore addicts. Heroin addiction is considered to be one of the hardest addictions to recover from.
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More than 50% of American adults have oral herpes, which is commonly known as "cold sores" or "fever blisters." The herpes virus can be active on the skin surface without showing any signs or causing any symptoms.
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Colchicine is a highly poisonous alkaloid originally extracted from a type of saffron plant that is used mainly to treat gout.
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It is important to read food labels and choose foods with low cholesterol and saturated trans fat. You should limit saturated fat to no higher than 6% of daily calories.
Comparison of small subunit (SSU) rRNA gene sequences from three animals and a protist.
The specialized arrangement of tissues in the small intestine.
Photograph of the flea that transmits Yersinia pestis to cause bubonic plague, called the oriental r
A small adult H. erectus from Olorgesailie, Kenya.
Three-dimensional models of the small and large subunits of ribosomes.
Bacterial small noncoding RNAs regulate gene expression