| 释义 |
▪ I. exˈplant, v.
[ad: mod.L. explant-āre, f. ex- (see ex- prefix1) + plantāre to plant, f. planta plant, on the analogy of implantāre.]
†1. trans. To send forth as an offshoot. Obs.
1578Banister Hist. Man v. 84 These [fibres] are explanted from the second cauitie or cell in the kidneys.
2. Biol. To transfer (living tissue) from its site in the body to some other place, usu. a nutrient medium in which a culture of the tissue is initiated. Hence exˈplanted ppl. a.
1915Amer. Jrnl. Anat. XVII. 342 Around the piece of explanted tissue the new growth forms a more or less radiating reticulum. 1922Jrnl. Exper. Med. XXXVI. 393 If part of an organ, for instance a toe of a chick embryo, was explanted, an uncontrolled proliferation of cells began from the injured parts. 1937Nature 6 Mar. 413/1 A typical maturation division figure was observed in an explanted ovary from a four-day (post-embryonic) rat after 9 days' cultivation. 1968Sci. Jrnl. Nov. 55/2 If the embryos are explanted during these three days, cell multiplication may continue.
▪ II. explant, n. Biol.|ˈɛksplɑːnt, -plænt|
[f. the vb.]
A piece of tissue, an organ, etc., that has been explanted.
1917Amer. Jrnl. Anat. XXII. 171 The explants consist of small pieces of muscle..taken from the muscles of the back, wing or leg of chick embryos. 1926Proc. R. Soc. B. XCIX. 352 During the first few days of life in vitro most of the explants showed ‘uncontrolled’ growth from the cut surface. 1957New Biol. XXIII. 115 Transplanting pieces to abnormal positions on the embryo, or..growing such pieces in isolation as ‘explants’, away from any influence of other tissues. 1970Passmore & Robson Compan. Med. Stud. II. xviii. 100/2 It is sometimes advantageous to use a tissue explant to study the growth of a virus. |