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In 1864, the first barbiturate (barbituric acid) was synthesized.
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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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Acute bronchitis is an inflammation of the breathing tubes (bronchi), which causes increased mucus production and other changes. It is usually caused by bacteria or viruses, can be serious in people who have pulmonary or cardiac diseases, and can lead to pneumonia.
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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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The heart is located in the center of the chest, with part of it tipped slightly so that it taps against the left side of the chest.
Influence of abiotic factors on competition between T. castaneum and T. confusum.
Hormonal and nervous factors influencing blood pressure
Richard Feynman
Stroke Risk Factors
Major regulatory factors controlling pyruvate dehydrogenase and the citric acid cycle
Conversion factors derivation.