| 单词 | ion pump |
| 释义 | > as lemmasion pump ion pump n. (a) a device for removing gas molecules from a space by ionizing them and applying a potential difference; (b) Cell Biology a cellular system, esp. a transmembrane protein, which transports specific ions across a cell membrane or other biological membrane; frequently with distinguishing word denoting the ion or ions concerned. ΚΠ 1951 Vacuum 1 263/1 The pumping speed of such an ion pump can easily be estimated. 1955 Q. Rev. Biol. 30 80/1 The nature of ion pumps is examined from a physico-chemical viewpoint. 1984 Internat. Jrnl. Mass Spectrometry 60 283 The vacuum system incorporates a rotary pump..and isolation valve which are used to rough down the ion pump if vacuum is lost. 2000 J. Mann Murder, Magic, & Med. (rev. ed.) ii. 19 They [sc. cardiac glycolsides] all inhibit the functioning of a sodium/potassium ion pump that is needed for maintenance of the normal ion balance in heart muscle cells. < as lemmas |
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