| purple sulfur b. |
a photosynthetic autotrophic anaerobic bacterium of the family Chromatiaceae. Purple sulfur bacteria reduce carbon dioxide and oxidize sulfides and elemental sulfur in the presence of the pigment bacteriochlorophyll a or b.
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| purpuric acid |
an imino-condensation product of alloxan, found in Weidel's test for uric acid. See also murexide, and Weidel's test (def. 1), under tests.
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| purpurine |
1. a neurotoxic substance derived from the median zone of the hypobranchial or purple gland of gastropods of the genus Purpura, thought to be an ester or a mixture of esters of choline; the substance is called murexine when derived from snails of the genus Murex. 2. purpurin (def. 1).
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| purpurinuria |
the presence of uroerythrin in the urine.
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| purpurogenous |
producing visual purple (rhodopsin).
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| PUR | a sum of money spoken of as the contents of a money purse |
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| PUR | contract one's lips into a rounded shape |
| PUR | gather or contract into wrinkles or folds |
| PUR | a seine designed to be set by two boats around a school of fish and then closed at the bottom by means of a line |
| PUR | a drawstring used to close the mouth of a purse |
| PUR | proud or arrogant because of your wealth (especially in the absence of other distinction) |
| PUR | a surgical procedure in which a suture is used to close the cervix in a pregnant woman |
| PUR | an officer aboard a ship who keeps accounts and attends to the passengers' welfare |
| PUR | a plant of the family Portulacaceae having fleshy succulent obovate leaves often grown as a potherb or salad herb |
| PUR | family of usually succulent herbs |
| PUR | North American annual with small white flowers widely naturalized as a weed in South America and Europe |
| PUR | the continuance of something begun with a view to its completion |