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Ether was used widely for surgeries but became less popular because of its flammability and its tendency to cause vomiting. In England, it was quickly replaced by chloroform, but this agent caused many deaths and lost popularity.

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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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During the twentieth century, a variant of the metric system was used in Russia and France in which the base unit of mass was the tonne. Instead of kilograms, this system used millitonnes (mt).

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Individuals are never “cured” of addictions. Instead, they learn how to manage their disease to lead healthy, balanced lives.

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Signs and symptoms of a drug overdose include losing consciousness, fever or sweating, breathing problems, abnormal pulse, and changes in skin color.

Spiral Produced by twisting stresses that are spread along the length of a bone (note the break in t Spiral Produced by twisting stresses that are spread along the length of a bone (note the break in t
A cutaway view of a typical two-stage turbine electric fuel pump. A cutaway view of a typical two-stage turbine electric fuel pump.
Standing at the head of the table, apply oil or lotion to chest area. Spread lubricant fanning out ... Standing at the head of the table, apply oil or lotion to chest area. Spread lubricant fanning out ...
A late stage in mitosis after the chromosomes (stained blue) have separated A late stage in mitosis after the chromosomes (stained blue) have separated
Regulation can occur at any stage in the expression of genetic material in eukaryotes Regulation can occur at any stage in the expression of genetic material in eukaryotes
Cytotoxic T Cell Killing a Cancer Cell Cytotoxic T Cell Killing a Cancer Cell
Video: Contraction and Relaxation Animation

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