thermoproteaceae (medicine) and Stroke - Motor Sports (gambling)

thermoproteaceae (medicine)

thermoproteaceae

A family of thermoproteales consisting of variable length rigid rods without septa. They grow either chemolithoautotrophically or by sulfur respiration. The three genera are: pyrobaculum, thermofilum, and thermoproteus.

Stroke - Motor Sports (gambling)

The up-and-down distance the piston travels within the cylinder. On a traditional internal combustion engine, the piston makes four strokes during the combustion cycle, only one of which is a power stroke. On the power stroke, the piston is near the top of the cylinder, and it has compressed the air and fuel mixture. The spark plug ignites the mixture, and the force of the explosion pushes the piston down into the cylinder, producing the force that turns the crankshaft. The piston returns to the top of the cylinder to expel the exhaust gases on the second, or exhaust, stroke. It slides down to the bottom of the cylinder during the intake stroke, when the valves open to let in air and fuel. The piston rises to the top of the cylinder on the compression stroke to begin the cycle anew. This process repeats hundreds or thousands of times a minute, resulting in the number of crankshaft revolutions per minute at which the crankshaft is rotating.

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