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The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.
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The term bacteria was devised in the 19th century by German biologist Ferdinand Cohn. He based it on the Greek word "bakterion" meaning a small rod or staff. Cohn is considered to be the father of modern bacteriology.
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Sildenafil (Viagra®) has two actions that may be of consequence in patients with heart disease. It can lower the blood pressure, and it can interact with nitrates. It should never be used in patients who are taking nitrates.
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Earwax has antimicrobial properties that reduce the viability of bacteria and fungus in the human ear.
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After a vasectomy, it takes about 12 ejaculations to clear out sperm that were already beyond the blocked area.