cell division


  • WordNet 3.6
    • n cell division the process in reproduction and growth by which a cell divides to form daughter cells
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Webster's Revised Unabridged Dictionary
    • Cell division (Biol) a method of cell increase, in which new cells are formed by the division of the parent cell. In this process, the cell nucleus undergoes peculiar differentiations and changes, as shown in the figure (see also Karyokinesis). At the same time the protoplasm of the cell becomes gradually constricted by a furrow transverse to the long axis of the nuclear spindle, followed, on the completion of the division of the nucleus, by a separation of the cell contents into two masses, called the daughter cells.
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In literature:

Division of labour has set in, and groups of cells specialise in the performance of functions.
"The Kempton-Wace Letters" by Jack London
Telophase, exceptional cases of division of the cell.
"Studies in Spermatogenesis (Part 1 of 2)" by Nettie Maria Stevens
This division consists of elongated nerve-cells, in man some two million in number for each half of the body.
"Encyclopaedia Britannica, 11th Edition, Volume 4, Slice 4" by Various
Or the cells may be more or less flattened, the divisions being widely separated.
"The Mechanism of Life" by Stéphane Leduc
Eventually the telomeres become so short that all cell division stops.
"Syndrome" by Thomas Hoover
What various forms of cell division did you find?
"A Guide for the Study of Animals" by Worrallo Whitney
Resting stage of the same, with fourfold division of the cell-contents.
"Encyclopaedia Britannica, 11th Edition, Volume 10, Slice 4" by Various
The ordinary method of increase is by cell division.
"The New Gresham Encyclopedia" by Various
The original function of reproduction, that of cell division, is the part of the female.
"Degeneracy" by Eugene S. Talbot
The natural mechanism for this purpose is cell division and nuclear division.
"The Biological Problem of To-day" by Oscar Hertwig
Before fertilization a neck-canal cell is formed by the division of the ovum-nucleus.
"Encyclopaedia Britannica, 11th Edition, Volume 12, Slice 7" by Various
The centrosome is efficient in the process of cell-division.
"Essays In Pastoral Medicine" by Austin ÓMalley
Leaf-divisions two cells wide or more.
"The Manual of the Botany of the Northern United States" by Asa Gray
That is, every species has a fixed number which regularly recurs in all of its cell-divisions.
"Being Well-Born" by Michael F. Guyer
Fertilization, cell division, and differentiation emphasized.
"A Civic Biology" by George William Hunter
Dissolved oxygen concentrations above 0.13 mM were found to inhibit cell division; energy utilization was also affected by oxygen concentration.
"Significant Achievements in Space Bioscience 1958-1964" by National Aeronautics and Space Administration
The production of new individuals is accomplished by the division of the old cell into two.
"Stories of the Universe: Animal Life" by B. Lindsay
The spore-cell multiplies by division, while the enveloping cell is nutrient and protective.
"Encyclopaedia Britannica, 11th Edition, Volume 14, Slice 2" by Various
In point of fact the simple egg-cell becomes two, by the process of cell-division which I have previously described.
"The History of Creation, Vol. I (of 2)" by Ernst Haeckel
In some cases of cell-division a remnant of the old nucleus is stated to be visible after the fresh nuclei have appeared.
"The Works of Francis Maitland Balfour, Volume 1" by Francis Maitland Balfour

In news:

IQGAP-Related Rng2p Organizes Cortical Nodes and Ensures Position of Cell Division in Fission Yeast.
Regulation of Cell Division in Escherichia coli.
Chemicals jump-started cellular division, resulting in 30 blastocysts, early-stage embryos that contain a mere 100 cells.
Cell Divisions in the Drosophila Embryonic Mesoderm Are Repressed via Posttranscriptional Regulation of string/cdc25 by HOW.
Schreiner ProTech, Southfield, MI, USA, a division of Germany based Schreiner Group GmbH & Co KG, has introduced a product line designed specifically for solar cell applications.
Telomeres protect the protein-coding sequences of DNA on the chromosome, and telomeric shortening during sequential cell divisions is believed to dictate a cell's life span.
Like other amoebas , naegleria reproduce by cell division.
Along with teaching such things as cell division, genetics, volcanoes and earthquakes, Kuemper Catholic middle school science teacher Kathy Stipe offers students some inspiration.
T elomeres are protective lengths of repetitive DNA at the end of chromosomes that shorten with each cell division.
A precision microfluidic system enables single-cell analysis of growth and division.

In science:

The sorting was performed by gating the cell flow to select cells smaller than the gate size. Since the cell size is smallest just after cell division and increases through cell cycle, gated cells should correspond to cells just after C5 in simulation.
Stable stochastic dynamics in yeast cell cycle
The division of the parent cell into two daughter cells occurs in the M phase.
The p53-MDM2 network: from oscillations to apoptosis
Furthermore, in many circumstances, the organization of chromosomes into heterochromatin and euchromatin regions will be inherited by the new cells generated from cell divisions .
Epigenetic Chromatin Silencing: Bistability and Front Propagation
Both states are stable to small fluctuations and are typically preserved in cell divisions - there is only a small probability of transitions back and forth between states - suggesting that the system is actually in a bistable regime.
Epigenetic Chromatin Silencing: Bistability and Front Propagation
Rectangular satins are of two kinds, those of even order not divisible by 4 and those of order divisible by 4, falling in the species 26o and 26e respectively. A satin results from distributing dark cells in the way characteristic of a satin, as in Figure 4a.
Isonemal Prefabrics with Perpendicular Axes of Symmetry
Mutations can happen due to errors in the genome duplication during cell division, or due to external reasons like ionizing radiation.
Review of haplotype complementarity under mutational pressure
Algorithm 1 gives a sketch of the greedy division of a region into hierarchy cells.
Multiresolution Cube Estimators for Sensor Network Aggregate Queries
In the example of Figure 3a cube C is further divided into 3 resolution levels, with some of the cell divisions displayed.
Multiresolution Cube Estimators for Sensor Network Aggregate Queries
The tessellation process changes its state only if a (”real”) cell is chosen for division and the line hits that cell and thus splits it in two cells.
A Proof of a Conjecture by Mecke for STIT tessellations
Additionally, independent of the line, one of the n quasi-cells will be selected for division.
A Proof of a Conjecture by Mecke for STIT tessellations
The division of a cell follows the same division rule, namely according to a Λ law, so that the distribution of both configurations is the same.
A Proof of a Conjecture by Mecke for STIT tessellations
Cowan summarized eight different models for cell division (in discrete time), coining the terms of selection rule and division rule, in .
A Proof of a Conjecture by Mecke for STIT tessellations
In this, in a given tessellation with n extant cells, the probability of a certain cell to be selected for division is 1 n , without regard of its perimeter or area or anything else.
A Proof of a Conjecture by Mecke for STIT tessellations
At the end of each cell’s lifetime, this cell is divided according to a division rule (here the division rule according to the law Λ([C ])−1Λ(· ∩ [C ]) for a cell C is suitable), resulting in two cells each with a lifetime exponentially distributed with the given parameter 1 and independent of all other lifetimes.
A Proof of a Conjecture by Mecke for STIT tessellations
Thus, when there are k cells in a given tessellation (i.e. after k − 1 divisions), the lifetime of each cell is E (1)-distributed, and the whole state of the tessellation process has a waiting time for change that is E (k)-distributed, as mentioned above.
A Proof of a Conjecture by Mecke for STIT tessellations