| 词汇 | protoplasm |
| 释义 | protoplasm noun[ U ] uk /ˈprəʊ.tə.plæz.əm/ us /ˈproʊ.t̬ə.plæz.əm/ the transparent liquid that is inside all living cells原生质 Cells actin anaphase anti-platelet assort axoplasm histochemistry histography homologous chromosomes infiltration intercellular neoplasia nerve fibre neurofibril neurofibrillary neuroglia teratoma tetrad thrombocyte thymocyte turgor protoplasm | American Dictionaryprotoplasm noun[ U ] us/ˈproʊ·t̬əˌplæz·əm/ biology the transparent liquid that is inside all living cells Examples of protoplasmprotoplasm This volume contains reprints of several of his earlier papers on protoplasm and cell theory. The blue-stained protoplasm is indicated by light stippling, the deeply-staining chromatin by black, and the pink or faintlystaining chromatin by close stippling. The latter has a somewhat spiral form, the protoplasm being alveolar and at times showing a granular structure. Molecules of dyestuffs became probes and measuring devices "by proxy"; and with respect to behavior toward oxygen they were analogous to protoplasm. The cellular organization of plants and animals was then of secondary importance behind the more essential chemical and physical properties of living protoplasm. One finds large masses of these pairs of forms in which the nucleus is hidden in the darkly staining protoplasm. This also highlighted the important distinction from theories of combustion which considered oxidation as taking place throughout the protoplasm, rather than at specific sites. The protoplasm is very dense and contains granules. The chromatin protruded in a fork-like manner into the buds of blue-staining protoplasm. To complete this description of the activity of the invariant protoplasm, an appropriate model was constructed. The increased water content helps in maintaining the turgidity of the assimilatory cells and the proper hydration of their protoplasm. The protoplasm (cytoplasm in modern terms) was the transparent ground substance which contained granules. Nuclear division is here complete, there being four distinct masses of chromatin which are usually of about the same size; the blue-staining protoplasm is beginning to collect around each nucleus. Both nuclei have already divided and are situated at opposite sides of the protoplasm, and, in addition, the end-bead is clearly seen in process of division. Arrowhead indicates strand of protoplasm extending towards cell wall (bar = 2 m). These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. |
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