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ring system |
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ring system [′riŋ ‚sis·təm] (organic chemistry) Arbitrary designation of certain compounds as closed, circular structures, as in the six-carbon benzene ring; common rings have four, five, and six members, either carbon or some combination of carbon, nitrogen, oxygen, sulfur, or other elements. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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| This is the first use of the die ring system in the U. But there's no consensus among Cassini scientists about how long the Saturnian ring system has been in place and how long it might last. The study was performed in the isolated pulmonary artery ring system and human pulmonary artery endothelial cells (HPAECs). |
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