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In 1864, the first barbiturate (barbituric acid) was synthesized.

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Alcohol acts as a diuretic. Eight ounces of water is needed to metabolize just 1 ounce of alcohol.

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Chronic marijuana use can damage the white blood cells and reduce the immune system's ability to respond to disease by as much as 40%. Without a strong immune system, the body is vulnerable to all kinds of degenerative and infectious diseases.

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The most dangerous mercury compound, dimethyl mercury, is so toxic that even a few microliters spilled on the skin can cause death. Mercury has been shown to accumulate in higher amounts in the following types of fish than other types: swordfish, shark, mackerel, tilefish, crab, and tuna.

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On average, someone in the United States has a stroke about every 40 seconds. This is about 795,000 people per year.

Mechanisms of active and passive immunity. Mechanisms of active and passive immunity.
Bolts and screws have many different heads. The head determines what tool is needed. Bolts and screws have many different heads. The head determines what tool is needed.
The lower intake manifold attaches to the cylinder heads. The lower intake manifold attaches to the cylinder heads.
Passive touch by holding the head lightly. Passive touch by holding the head lightly.
Turn the baby over and end with passive touch on the head. Gently hold the baby’s head and look ... Turn the baby over and end with passive touch on the head. Gently hold the baby’s head and look ...
Elderly/ grandparents listening to music Elderly/ grandparents listening to music
Video: Atrophy

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