karyo-comb. form

1891 Jrnl. Royal Microsc. Soc. 49 In Hydatina, as in some Hymenoptera, there is established between arrhenotoky (parthenogenetic production of males) and fecundating karyogamy, a relation so necessary that the second is impossible without the first.

1901 G. N. Calkins Protozoa iii. 97 It is quite possible that many cases of so-called conjugation are only instances of plastogamy, or fusion of the cell-body, and are not followed by union of the nuclei (karyogamy), as in fertilization.

1920 W. E. Agar Cytol. 72 The condition of the gametic nuclei..at the moment of karyogamy or nuclear fusion.

1970 J. Webster Introd. Fungi 187 Karyogamy (i.e. nuclear fusion) occurs within certain of the binucleate cells.

1882 S. H. Vines tr. J. von Sachs Text-bk. Bot. (ed. 2) 17 In the process of division into two the nucleus usually goes through a series of changes which are designated by the term Karyokinesis.

1894 H. Drummond Lowell Lect. Ascent of Man i. 80 The fertilised ovum has completed the complex preliminaries of Karyokinesis.

1885 Sedgwick in Proc. Royal Soc. 39 243 The karyo~kinetic figures characteristic of the ectodermal nuclei.

1888 G. Rolleston & W. H. Jackson Forms Animal Life (ed. 2) Introd. 23 The ovular nucleus..undergoes karyokinetic changes.

1899 T. C. Allbutt et al. Syst. Med. VI. 491 Fine fibrils..floating in the karyolymph.

1899 T. C. Allbutt et al. Syst. Med. VI. 168 The leucocytes, often at an early date, undergo fatty degeneration and necrosis, their nuclei disappearing both by karyolysis and karyorrhexis.

1883 tr. Ziegler's Path. Anat. I. §75 Radiating lines of granules making up the so-called karyolytic figure.

1912 Jrnl. Acad. Nat. Sci. Philadelphia 15 525 The most general results of increased temperature are:... (4) Formation of numerous karyomeres from these scattered chromosomes; indeed by slight increase of temperature almost every chromosome may be caused to remain distinct from every other one, and to give rise to a separate chromosomal vesicle.

1920 W. E. Agar Cytol. 130 The chromosomes of the spermatogonial telophases do not come into contact at all, but each one forms a separate little nucleus, or karyomere, by itself.

1934 L. W. Sharp Introd. Cytol. (ed. 3) x. 136 Of considerable interest are those nuclei in which every chromosome of the telophase group forms an individual vesicle, or karyomere. In some cases the karyomeres may eventually fuse partially or completely, but in others they remain separate although in contact, forming what is virtually a group of small nuclei containing one chromosome each.

1934 L. W. Sharp Introd. Cytol. (ed. 3) x. 146 The limits of the several chromosomes remain visible through this stage [sc. between mitoses] in certain nuclei; in extreme cases the nucleus is virtually a group of separate elementary nuclei, or karyomeres.

1969 W. V. Brown & E. M. Bertke Textbk. Cytol. xvii. 318/2 Karyomeres are rather like micronuclei except that they are normal and become associated to form a ‘compound’ nucleus.

1889 tr. W. Waldeyer in Q. Jrnl. Microsc. Sci. 30 247 The definite segmentation-nucleus..arises by the envelopes (or body) of the karyo- and spermato-merites.

1902 Encycl. Brit. XXV. 392/2 The other part of the karyomiton or nuclear net is incapable of being stained.

1885 Schäfer in Proc. Royal Soc. 38 91 The cells of lymphoid tissue multiply abundantly by karyomitosis.

1897 T. C. Allbutt et al. Syst. Med. II. 7 These cells..frequently show the phenomenon of karyo-mitosis, that is, a division of their nucleus with a star-shaped figure at each end.

1885 Schäfer in Proc. Royal Soc. 38 91 Those peculiar changes in the nucleus which have been termed karyokinetic or karyomitoic.

1899 T. C. Allbutt et al. Syst. Med. VI. 491 The nucleus or karyo~plasm, also shows a reticulum of exceedingly fine fibrils.

1920 L. Doncaster Introd. Study Cytol. ii. 16 Hertwig regards a disturbance of the normal karyo-plasmatic ratio as the immediate cause of cell-division, and supposes that the unequal rate of growth of nucleus and cytoplasm brings about a condition of ‘karyo-plasmatic strain’ leading to cell-division and a consequent restoration of the normal ratio.

1909 Cent. Dict. Suppl. Karyoplasmic.

1924 E. V. Cowdry Gen. Cytol. 351 Hertwig's karyoplasmic relation hypothesis.

1925 E. B. Wilson Cell (ed. 3) iii. 237 These various facts show on how precarious a basis rest theories of senescence and rejuvenescence which refer these processes to changes in the karyoplasmic ratio.

1948 R. A. R. Gresson Essent. Gen. Cytol. i. 2 It has been found that a quantitative relationship exists between nuclear mass and cytoplasmic mass; this is known as the karyoplasmic ratio.

1966 D. M. Kramsch tr. E. Grundmann Gen. Cytol. ii. 66 The optical appearance of the karyoplasmic area is homogeneous and frequently seems to be empty.

1896 E. B. Wilson Cell 337 Karyotheca, the nuclear membrane.

1948 W. Andrew tr. E. D. P. de Robertis Gen. Cytol. iii. 45 Between the two parts of this heterogeneous system.., there is found the karyotheca or nuclear membrane.