| 单词 |
ultrastructure |
| 释义 |
ˈultraˌstructure
[f. ultra- 2 + structure n.]
Structure of biological material that is visible only under greater magnification than can be obtained with optical microscopy.
1939F. O. Schmitt in Physiol. Rev. XIX. 270 The term ultrastructure as used in this review denotes the sub⁓microscopic organization of cellular and tissue components. 1948New Biol. V. 34 Experiments with the centrifuge and micromanipulator show..that organised development can be interfered with by breaking up this ultrastructure, but as we have seen, it often reforms itself after such a breakdown. 1970Jrnl. Neurosurg. XXXII. 142/2 The ultrastructure of the capillaries in human malignant brain tumors has been studied. 1977J. L. Harper Population Biol. Plants v. 131 A seed that is going to germinate may begin to show marked changes in the ultrastructure of its cells within 30 min of welting.
Hence ultraˈstructural a., of or pertaining to ultrastructure; ultraˈstructurally adv., with regard to ultrastructure.
1939Physiol. Rev. XIX. 270 To learn the details of the ultrastructural organization of such systems it is necessary to know the chemical composition and the physical and chemical properties of the molecules which compose the system. 1971Nature 2 Apr. 334/2 Ultrastructurally, as well as by light microscopy, the human parafollicular cells were similar to those of other mammals. 1975Ibid. 7 Aug. 459/3 Ultrastructurally, the size (diameter 600 {pm} 150 Å), but not the number, of nuclear pores is remarkably constant in all eukaryotic cells. 1977Proc. R. Soc. Med. LXX. 670/2 The anatomical, histological, ultrastructural and physiological aspects of normal peripheral nerves. |
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