(redirected from interphases)
Also found in: Dictionary, Medical.
Related to interphases: telophase, interfaces


(cell and molecular biology)
Also known as interkinesis.
The period between succeeding mitotic divisions.
The period between the first and second meiotic divisions in those organisms where nuclei are reconstituted at the end of the first division.
A region between the two phases of a newly created interface that contains particles of both phases.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.



interkinesis, the stage in the life cycle of a cell between two successive mitotic divisions.

A distinction is usually made between the heterosynthetic interphase, when the cell grows, is differentiated, and performs its natural functions, and the autosynthetic interphase, during which the cell prepares for the next division. Depending on the intensity of synthesis of desoxyribonucleic acid (DNA), the autosynthetic interphase is divided, in turn, into three periods: G1– presynthetic, or postmitotic; S—synthetic; and G2—premitotic, or postsynthetic. During the G1 period the energy resources needed for cell division accumulate, ribonucleic acid (RNA) is synthesized, and preparation is made for the replication of DNA molecules. The cell mass enlarges because of the protein synthesized at this time, and several enzymes needed for DNA synthesis during the subsequent period are formed. DNA is synthesized during the S period—that is, its molecules are replicated. DNA synthesis is completed during the G2 period and the synthesis of RNA and proteins intensifies, apparently in order to construct the mitotic apparatus.

In the cells of an adult organism the interphase takes 10 to 30 hours or more, but in rapidly dividing cells it lasts just several minutes (for example, 14 min. in sea urchin eggs at the two-to-four-blastomere stage).

Some investigators distinguish in the interphase a “zero period” (Go) that precedes the G1 period. The G0 is most clearly manifested in cells that as a rule do not divide in the adult organism (under the influence of various factors they may enter the G1 period, pass through the S and G2 periods, and enter into mitosis proper). The boundary between all the periods of the interphase or between mitosis and the interphase is not sharp. Some investigators believe that the S and G2 periods should be regarded as the beginning of mitosis (the preprophase, during which cell reproducton also begins), and not as part of the interphase.


Meziia, D. Mitoz i fiziologiia kletochnogo deleniia. Moscow, 1963.
Alov, I. A., A. I. Braude, and M. E. Aspiz. Osnovy funktsional’noi morfologii kletki, 2nd ed. Moscow, 1969.


The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
The interaction of micro-crack and particles covered by the interphase is analyzed.
But the interphase is pretty unforgiving, and your squad, because you can't split it up and individually move around, will blunder into ambush after ambush as a result.
The failure types included: glue failure (failure of the epoxide at the pin/paint interphase), cohesive coating failure, cohesive wood failure, failure between the coating layers, and failure of the wood-coating interphase (Figure 1).
Except for pure gold fillings, all dental restoratives are multiphase materials having a composite micro-structure involving one or more interfaces or interphases. With regard to composites, the term interface is reserved for the relatively sharp boundary layer that exists between the continuous or matrix phase and the dispersed or filler phase of these heterogeneous materials.
An interphase layer is extended along the phase border of the polymer and filler due to the attractive interaction between them, and a large surface area provided by the dispersion of the nanoparticles [7, 8], The fraction of amorphous chains trapped in the interphase (entangled to the absorbed layer) exhibits restricted dynamics compared to bulk-like chains.
(8.) Straccia, A.M., Haack, L.P., Dziadosz, J.J., and Holubka, J.W., "XPS Characterization of Bonding Interphases in Paint Systems Following Ultra-Low-Angie Cross-Sectional Microtoming," Proc.
With increasing filter strength, not only the PMMA, but also the immobilized alkyd of an existing interphase, is suppressed, leading to the final value lower than the ones expected from the core-shell ratio of 0.5.
Blackwell, in "Controlled interphases in composite materials, " H.
Nguyen was Director of the NIST/Industry Consortium on Polymer Interphases, which he founded, from 2001 to 2007.
Among the topics are mapping epoxy interphases, structure formation in barnacle adhesives, new resins and nanosystems for high-performance adhesives, novel adhesion promoters based on hyperbranched polymers, and the laser surface treatment of composite materials to enhance adhesion properties.
If we try to compare these different results with the model developed in this article, we can deduce that for the various systems we are in different interphases ranges.
The papers are grouped into seven main topics: adhesion force measurements, chemical origins of adhesion, roughness effects, capillary adhesion and wetting phenomena, measurements of colloidal forces, adhesion mapping and surface imaging, and examination of interphases and nano-indentation.

Full browser ?