Category: P
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Quart
A unit of fluid equal to one fourth of a gallon, or 2 pints, or 946 ml; in dry measure, one eighth of a peck.
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Pythogenesis
Originating in decaying matter.
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Pyrrolidine
Tetramethyl-amine, (CH2)4NH. It may be obtained from pyrrole or tobacco, which contains pyrrole.
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Pyrrole
A heterocyclic substance that provides the building blocks for a large number of vital compounds such as hemoglobin, chlorophyll, and bile acids. It is a colorless liquid with the odor of chloroform.
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Pyroxylin
Nitrocellulose in ether or acetone. It is a toxic and extremely flammable white fiber used in lacquers, plastics, and resins, among other applications.
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Pyrophosphatase
An enzyme that catalyzes splitting of phosphoric groups.
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Pyronine
A histological stain used to demonstrate the presence of RNA and DNA.
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Pyrometer
A device for measuring a very high temperature. A device used to measure heat levels that exceed the capacity of a standard thermometer.
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Pyroglobulinemia
An obsolete term for paraproteinemia.
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Pyrithiamine
A synthetic analog of thiamine that blocks thiamine transport. It was used experimentally in studies of human lymphoblasts to mimic nutritional diseases such as beriberi and Wemicke-Korsakoff syndrome, two forms of thiamine deficiency.