| 单词 | daughter nucleus |
| 释义 | > as lemmasdaughter nucleus daughter nucleus n. [in sense (a) after German Tochterkern (1855 in the passage translated in quot. 1857, or earlier)] (a) Cell Biology each of two or more nuclei formed by the division of the parent nucleus in mitosis or meiosis; (b) Physics a nucleus formed by radioactive decay of another nucleus (the parent). ΚΠ 1857 E. Lankester tr. G. F. Küchenmeister On Animal & Veg. Parasites Human Body I. 300 The centre also divides into small nuclei, which unite with the above-mentioned segments, and thus are produced cells with daughter-nuclei [Ger. Tochterkernen], which however do not advance far in segmentation. 1925 Proc. Royal Soc. B. 98 228 Carleton..has shown that during mitosis in the frog, the ‘nucleolinus’ divides and that one part of it is found in each daughter nucleus. 1934 Bell Syst. Techn. Jrnl. 13 592 The stationary states or energy-levels deduced from the (Ui—Uj)-values and the hν-values then would pertain to the ‘final’ or daughter nucleus. 1989 B. Alberts et al. Molecular Biol. Cell (ed. 2) xiii. 764 (caption) At telophase the daughter nuclei re-form, and by late telophase cytokinesis is almost complete, with the midbody persisting between the daughter cells. 2005 L. J. Chaisson Epic of Evol. iv. 219 If the rock melts, there is no particular reason to expect the daughter nuclei to remain in the same locations their parents had occupied, and the whole method [sc. radioactive dating] fails. < as lemmas |
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