| 释义 |
translocation|trɑːnsləʊˈkeɪʃən, træns-|
[f. trans- + location.]
1. a. Removal from one place to another; displacement; dislocation; † transmigration. Esp. in reference to the removal of wild animals.
1624F. White Repl. Fisher 424 Translocation of Christs bodie. 1625N. Carpenter Geog. Del. ii. x. (1635) 174 A seperation was made by translocation of the parts of the Earth. 1665Sir T. Herbert Trav. (1677) 116 All defending the immortality of the Soul, and the translocation from one into another after death. 1677Cary Chronol. ii. i. i. xx. 152 There is..a casual translocation of the Numbers. a1728Woodward Catal. Eng. Fossils (1729) ii. 4 margin, There happen'd certain Translocations at the Deluge. c1814Coleridge in Lit. Rem. (1838) III. 80 Translocation is not destruction. 1876Gladstone Homeric Synchr. 79 A Revolution involving such extensive change, and such translocation of races. 1877Foster Phys. i. ii. §2 (1878) 79 The muscular contraction itself is essentially a translocation of molecules. 1962Oryx VI. 215 By translocation is meant the transfer of wild animals from one area to another. 1969J. Fisher et al. Red Bk. 123/2 Several countries have already used the drug and translocation method to introduce or re-introduce rhinos.
b. Veg. Physiol.: see quots.
1887H. M. Ward tr. J. von Sachs' Lect. Physiol. Plants xxi. 347 For starch also is found at places in the tissue where it has neither been originally produced nor is employed, and thus in a condition of translocation towards the places where it is made use of. 1900B. D. Jackson Gloss. Bot. Terms, Translocation..the transference of reserve material from one part to another. 1911Webster, Translocation,..transfer of food materials or products of metabolism from one part to another by osmosis. 1951Chambers's Jrnl. Aug. 457/1 In the case of these perennial weeds with persistent root-stocks the chlorate acts by the method of translocation, working downward, cell by cell, from the sprayed tops to the lowest root-tip. 1976Noggle & Fritz Introd. Plant Physiol. xii. 357 Translocation of sugars in the phloem is through living sieve elements.
2. Genetics. A transposition (sense 7), esp. to a position on a non-homologous chromosome; also, a portion of chromosome that is translocated.
1923Anat. Rec. XXIV. 426 (heading) The translocation of a section of chromosome-II upon chromosome-III in Drosophila. 1924[see transposition 7]. 1937C. D. Darlington Rec. Adv. Cytol. (ed. 2) vii. 265 They may also arise with translocation of a segment from one chromosome to another or from one arm of a chromosome to another. 1956[see aneuploidy]. 1962Lancet 8 Dec. 1229/2 In all cases diagnosed confidently as having Down's syndrome we have found an excess of material of chromosome no. 21, either as an additional chromosome in the regular trisomic type or as a translocation. 1977Nature 3 Nov. 10/3 It is thought that interaction between the two inverted sequences plays an important part in this translocation.
Hence transloˈcational a.
1930Jrnl. Genetics XXII. 312 (caption) Translocational parent. 1965Jrnl. Cellular & Compar. Physiol. LXV. 280/2 There was virtually no translocational movement in the partially rounded individuals. |