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The senior population grows every year. Seniors older than 65 years of age now comprise more than 13% of the total population. However, women outlive men. In the 85-and-over age group, there are only 45 men to every 100 women.

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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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Malaria was not eliminated in the United States until 1951. The term eliminated means that no new cases arise in a country for 3 years.

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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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Limit intake of red meat and dairy products made with whole milk. Choose skim milk, low-fat or fat-free dairy products. Limit fried food. Use healthy oils when cooking.

Photoidentification and the North Atlantic humpback whale population. Photoidentification and the North Atlantic humpback whale population.
An adult male killer whale with its characteristic tall dorsal fin swims in the waters near Tysfjord An adult male killer whale with its characteristic tall dorsal fin swims in the waters near Tysfjord
Soil Cleans Water Soil Cleans Water
Polar Ocean Productivity Polar Ocean Productivity
Water as a Polar Molecule Water as a Polar Molecule
A Bat Ray cruising through the water column below the "sunburst." Bat Rays are types of ... A Bat Ray cruising through the water column below the "sunburst." Bat Rays are types of ...
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