| 释义 |
pyknosis Cytology.|pɪkˈnəʊsɪs|
Also pycnosis.
[f. Gr. πυκν-ός close, compact + -osis.]
The contraction of a dying cell, or of its nuclear material, into a densely staining mass or masses.
1900Dorland Med. Dict. 552/1 Pyknosis, a thickening; especially degeneration of a cell in which the proto⁓plasmic substance becomes more dense and the size of the cell smaller. 1926Arch. Neurol. & Psychiatry XVI. 135 In general there is a progressive shrinking and pyknosis of the nucleus. 1946[see hyperchromatosis 2]. 1950A. W. Ham Histol. v. 60 The changes that occur in nuclei as, or after, individual cells die in the living body are of three sorts. The commonest one is called pycnosis; this consists of a shrinkage of the nuclear material into a homogeneous hyperchromatic mass. 1972Physics Bull. Mar. 147/1 The biological end points that will be studied include glycogen accumulation, nerve cell pyknosis, nerve cell injury or loss and glial reaction. 1978Nature 25 May 306/2 In minced muscle grafts sarcoplasmic structure was rapidly lost, and most muscle nuclei seemed to undergo pyknosis, fragmentation and lysis. |