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Did you know?

Intradermal injections are somewhat difficult to correctly administer because the skin layers are so thin that it is easy to accidentally punch through to the deeper subcutaneous layer.

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In 1835 it was discovered that a disease of silkworms known as muscardine could be transferred from one silkworm to another, and was caused by a fungus.

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Coca-Cola originally used coca leaves and caffeine from the African kola nut. It was advertised as a therapeutic agent and "pickerupper." Eventually, its formulation was changed, and the coca leaves were removed because of the effects of regulation on cocaine-related products.

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Barbituric acid, the base material of barbiturates, was first synthesized in 1863 by Adolph von Bayer. His company later went on to synthesize aspirin for the first time, and Bayer aspirin is still a popular brand today.

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In 1844, Charles Goodyear obtained the first patent for a rubber condom.

Two main types of nerve cells. Two main types of nerve cells.
Pre–Main-Sequence Evolutionary Tracks Pre–Main-Sequence Evolutionary Tracks
This girl’s photo illustrates the main features of fetal alcohol syndrome, including a flat nasal ... This girl’s photo illustrates the main features of fetal alcohol syndrome, including a flat nasal ...
Without losing contact, move to the recipient’s right side. Stand at the hip and face the head. ... Without losing contact, move to the recipient’s right side. Stand at the hip and face the head. ...
Circular clockwise pattern. Gently lay a hand on the abdomen to establish contact. Apply effleurage ... Circular clockwise pattern. Gently lay a hand on the abdomen to establish contact. Apply effleurage ...
If 0.40 mol of NaN3 reacts completely in the reaction shown below, then ________ L of N2 will ... If 0.40 mol of NaN3 reacts completely in the reaction shown below, then ________ L of N2 will ...
Video: Chemical Messengers Animation

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