| 释义 |
▪ I. Wood, n.3|wʊd|
The name of B. Wood (see quot. 18601) used in the possessive to designate an easily melted alloy consisting of bismuth, lead, tin, and cadmium in decreasing proportions and used esp. for soldering.
Patented by Wood in U.S. Patent 27,590 (1860).
1860Amer. Jrnl. Sci. LXXX. 271 [New ‘fusible metal’.—Dr. B. Wood of Nashville, Tenn., has secured a patent (Weekly Scientific Artizan, Cincinnati, May 5th, 1860,) for an alloy composed of cadmium, tin, lead and bismuth, which fuses at a temperature between 150° and 160° F.] Ibid. 272 We have had time only to repeat a few of Dr. Wood's interesting experiments... The alloy made by fusing together two parts of cadmium, two parts tin, four parts lead and eight parts bismuth melts at a temperature varying not far from 70° C. (158° F.) It may appropriately be called ‘Wood's fusible metal’.—Eds. 1876Jrnl. Chem. Soc. XXX. 592 The author then describes the method adopted by himself to measure the volumes of the four following fusible alloys at temperatures between 0° and 120°:―{ddd}III. Wood's alloy, the composition of which is represented by the formula Bi4 Pb Cd2 Sn2. 1947J. C. Rich Materials & Methods of Sculpture vi. 192 Wood's metal is rarely employed sculpturally although the material could be used as a casting medium because of its low melting point. 1974Nature 11 Oct. 506/2 One eye was centred on a projection perimeter..and the visuotectal representation for that eye on the right tectum mapped with a Woodsmetal microelectrode.
▪ II. Wood, n.4 Med.|wʊd|
The name of Robert W. Wood (1868–1955), U.S. physicist, used in the possessive to designate (a) a special glass that is opaque to visible light but transmits ultraviolet, and (b) ultraviolet light obtained by using this glass as a filter to remove visible components.
1925Index Medicus X. 988/1 Experimental tumours studied by Wood's light. 1927Brit. Jrnl. Actinotherapy Jan. 24/2 The healthy scalp under Wood's light gives only a feeble fluorescence of a dark violet colour. 1927Brit. Jrnl. Dermatol. & Syphilis XXXIX. 352 Wood's glass costs about 1s. 6d. per square inch, but only a small piece is required. 1951Whitby & Hynes Med. Bacteriol. (ed. 5) xiv. 261 The microscope is illuminated by a mercury-vapour lamp with a Wood's glass filter which transmits ultraviolet but not visible light. 1958New Biol. XXVII. 56 In 1925 two French workers discovered that Microsporum-infected hairs showed a very characteristic greenish fluorescence in ultra-violet light which had been filtered through glass containing nickel oxide, the so-called Wood's Light. 1961R. D. Baker Essent. Path. ix. 223 (caption) A Negro child developed papular white scaly oval lesions... The involved regions fluoresced with Wood's light. 1983Oxf. Textbk. Med. I. v. 371/1 When large numbers of children are involved, screening of scalp infections with a filtered ultra-violet (Wood's light) lamp is useful. |