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For about 100 years, scientists thought that peptic ulcers were caused by stress, spicy food, and alcohol. Later, researchers added stomach acid to the list of causes and began treating ulcers with antacids. Now it is known that peptic ulcers are predominantly caused by Helicobacter pylori, a spiral-shaped bacterium that normally exist in the stomach.

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Drug-induced pharmacodynamic effects manifested in older adults include drug-induced renal toxicity, which can be a major factor when these adults are experiencing other kidney problems.

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According to the FDA, adverse drug events harmed or killed approximately 1,200,000 people in the United States in the year 2015.

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There are 20 feet of blood vessels in each square inch of human skin.

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Hip fractures are the most serious consequences of osteoporosis. The incidence of hip fractures increases with each decade among patients in their 60s to patients in their 90s for both women and men of all populations. Men and women older than 80 years of age show the highest incidence of hip fractures.

Nitrogen fluxes in Sycamore Creek, Arizona (data from Grimm 1988). Nitrogen fluxes in Sycamore Creek, Arizona (data from Grimm 1988).
tree-ring data tree-ring data
Beware of “Common Sense” Explanations Beware of “Common Sense” Explanations
Common Abbreviations and Symbols Used by Massage Therapists Cont Common Abbreviations and Symbols Used by Massage Therapists Cont
The material safety data sheet (MSDS) for sulfuric acid showing the detailed technical information ... The material safety data sheet (MSDS) for sulfuric acid showing the detailed technical information ...
Macaroni and cheese provides a double source of riboflavin from the pasta and the cheese Macaroni and cheese provides a double source of riboflavin from the pasta and the cheese
Video: Chemical Messengers Animation

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