| 释义 |
ultraˈmicrotome
[f. ultra- 2 c + microtome.]
A microtome for cutting sections thin enough for electron microscopy (typically about 300 nanometres thick).
1953Jrnl. Electron Microsc. I. 44 (heading) A simplified thermal expansion type ultramicrotome. 1966D. G. Brandon Mod. Techniques Metallogr. 92 A plate glass or diamond knife ultramicrotome has proved to be the most successful method available for producing thin sections of biological specimens for electron microscope examination, and serious attempts have been made to adapt the technique to metallurgical specimens. 1980Amer. Jrnl. Tropical Med. & Hygiene XXIX. 775/1 Ultra-thin sections..were cut with either glass knives or diamond knives on an ultramicrotome.
Hence ultraˈmicrotomed ppl. a., sectioned with an ultramicrotome; ultramiˈcrotomy, the practice or technique of using the ultramicrotome.
1949Science 15 July 66/2 A promising new development in ultramicrotomy is presented. 1976Nature 8 Apr. 513/1 Detailed examinations of a Georgia kaolinite using high resolution electron microscopy of ultramicrotomed section of the kaolinite mineral revealed not only the expected 7 A. (001) spacing, but also occasional 10 and 14 A. spacings. 1978Ibid. 30 Mar. 433/1 Ultramicrotomy and ion beam thinning of films..have provided greater information on film morphology and composition. 1982Electrochimica Acta XXVII. 245 Electron microscopy..of stripped anodic films and ultramicrotomed sections of the aluminium substrate and the anodic film have been used to examine directly the general film growth over the macroscopic metal surface. |