| 释义 |
transduce, v.|trɑːnsˈdjuːs, træns-, -nz-|
[Back-formation from next.]
1. trans. To alter the physical nature or medium of (a signal); to convert variations in (a medium) into corresponding variations in another medium.
1949L. L. Beranek Acoustic Measurements xiv. 637 The dynamic range of a microphone is the range of levels of input signals which can usefully be transduced by the instrument. It is..limited at high levels by the amount of distortion which can be tolerated in the transduced signal. 1971Nature 19 Feb. 530/2 Rhodopsin, a visual pigment found in vertebrate retinal rods, transduces light into a neural message. 1973Sci. Amer. Sept. 87/1 (Advt.), It transduced a heart's faint signals into a squiggly line that the doctor could compare with those produced by other hearts. 1977Listener 22–29 Dec. 857/4 Carbon granules..to do their delicate work of transducing sound waves into varying electric currents.
2. Microbiology. Of a virus: to transfer (genetic material) from one bacterium to another; also used with the first bacterium as obj. Also, to transfer (a genetic characteristic) from one bacterium to another using a virus.
1952Jrnl. Bacteriol. LXIV. 687 FA [sc. filterable agents] from each of the three LT-7 auxotrophs could transduce the other two. 1965Virology XXVII. 290 (heading) Variation in composition of chromosome fragments transduced by phage P22. 1973R. G. Krueger Introd. Microbiol. xiv. 404/2 In contrast to the specialized transducing phages, the viruses P1 and P22 can transduce a variety of genes in the bacterial genome. 1977Lancet 9 July 94/2, 47 gen-r (ex 8799) was a resistant transductant produced by transducing the gentamicin resistance from strain 75/8799 to propagating strain (PS) 47.
Hence transˈduced, transˈducing ppl. adjs.; transˈducible a., susceptible to transduction.
1952Jrnl. Bacteriol. LXIV. 686 All of the transduced cells were still streptomycin resistant. Ibid. 687 Several galactose-negative mutants were transducible to galactose-positive by FA [sc. filterable agent] from their parental wild type. 1952Physiol. Rev. XXXII. 414 The chemical composition of transducing agents has important implications, if they can be regarded as purified genes. 1962R. Goldman Ultrasonic Technol. iii. 67 A transducing crystal must also be mounted in some sort of holder. 1971G. S. Stent Molecular Genetics xiv. 416 Upon closer examination of the clones of transduced bacteria or transductants..it was found..that all the Gal+ transductants were either actively lysogenetic.., or were at least immune to infection. 1973Transducing [see sense 2 above]. |