Nuclear division

J. C. Million, C. W. Weber, and P. R. Kuehn, Gas Chromatography of Some Corrosive Halogen-Containing Gases, Report No. K-1639, Union Carbide Corp., Nuclear Division, New York, 1966. 

The vegetative cell cycle of S. cerevisiae has received extensive attention. There are many justifications for this. Firstly, the cell cycle in this organism has many convenient landmarks (Hartwell 1974, 1978 Pringle 1978) which make it very easy to identify the exact point in the cell cycle at which a cell happens to be. Examples of these landmark events include bud emergence, the size of the bud, mitosis (nuclear division takes place through the neck between the mother cell and the bud), and cell... 

The latter substance, as is well known, interferes with nuclear division in plants. Temple-man and Sexton (35) showed that, contrary to the effects of the phenoxyacetic acids, the arylurethanes destroy cereals more readily than the dicotyledonous plants. 

Fisher, C. R., and P. Y. Achener, 1965, Alkali Metals Evaluation Program—Swirl Flow Boiling of Alkali Metals Heat Transfer and Pressure Drop, Rep. AGN-8127, Aerojet General—Nuclear Division, General Atomic, San Diego, CA. (5)... 

Mitosis Nuclear division in cells producing daughter cells that are genetically identical. 

Subcontract 19Y-55412v, Report to Union Carbide Corp., Nuclear Division by Dept, of Hydrology and Water Resources, University of Arizona, Tucson, 138 p., 1978. 

Bentley, H. W., Some comments on the use of chlorine-36 for dating very old ground water, In Workshop on dating old ground water, S. N. Davis, ed., Subcontract 19Y-55412v, report to Union Carbide Corp., Nuclear Division, by Department of Hydrology and Water Resources, University of Arizona, 138 p., 1978. 

This happened earlier this month when three General Electric engineers in California resigned from one of the company s nuclear divisions because they had reached the conclusion that nuclear energy represented a profound threat to mankind. 

Mitosis the process of nuclear division in eukaryotic cells. 

Figure 6.48 Gametogenesis in humans showing the number of nuclear divisions giving rise to the gametes. Each average fertilizing spermatozoon is the result of 900 divisions of the primary spermatogonium.

G2 Phase M Phase Mitosis (nuclear division) and GO Phase... 

PROTHALLIAL Cell One of the early disintegrating vegetative cells laid down by the first nuclear divisions in the gymnospermous microspore. 

Brunborg, G. Williamson, D.H. (1978). The relevance of the nuclear division cycle to radiosensitivity in yeast. Molec. Gen. Genet. 162, 277-286. 

The functional role of the CaMK cascade in Aspergillus is based on loss of function studies. The deletion of the Cmkb gene is lethal, therefore the consequences of loss of function was assessed by disrupting the Cmkb promoter, which results in a 1-2 h delay in CMKB protein expression upon spore germination (Joseph and Means, 2000). This delay in expression results in a 2 h delay in nuclear division after germination (both for the first and the second nuclear divisions) which is consistent with a similar increase of the duration of the cell cycle (Joseph and Means, 2000). Together these results clearly demonstrate that CMKB regulates the cell cycle. 

Joseph, J. D. and Means, A. R., 2000, Identification and characterization of two Ca2- -/CaM-dependent protein kinases required for normal nuclear division in Aspergillus nidulans, J Biol Chem, 275, pp 38230-8. 

When heavier nuclei are bombarded by slow neutrons, the nuclei of lighter elements are formed. Besides the energy released, several neutrons are emitted. The disintegration of a heavier nucleus into lighter nuclei by neutron bombardment is called nuclear fission (nuclear division). 

CHROMOSOME A nucleoprotein structure, generally more or less rodlike during nuclear division a physical structure that bears genes each species has a characteristic number of chromosomes. 

The nuclear division process during the M phase lasts less than an hour. The M phase can be divided into six distinct stages, according to the progression of nuclear division (prophase, prometaphase, metaphase, anaphase, telophase, and cytokinesis) (adapted from Alberts etal., 2002). 

Graeser R, Wernli B, Franklin RM, Kappes B (1996) Plasmodium falciparum protein kinase 5 and the malarial nuclear division cycles. Mol Biochem Parasitol 82( 1 ) 37—49... 

Carotenoid synthesis—> Destruction of pigments Cell or nuclear division -----------------v... 

Cristy, S. S., Ferree, D. V., Nolan, T. A., and McCulla, W. H., Studies of Oxide and Fluoride Films on Metals Using an Ion Microprobe Mass Analyzer, Y-DA 4815, Union Carbide Corporation—Nuclear Division, Oak Ridge Y-12 Plant, Oak Ridge, TN (1972). 

The principle distinguishing features of the procaryotic cell are 1) absence of internal membranes which separate the resting nucleus from the cytoplasm, and isolate the enzymatic machinery of photosynthesis and of respiration in specific organelles 2) nuclear division by fission, not by mitosis, a character possibly related to the presence of a single structure which carries all the genetic information of the cell and 3) the presence of a cell wall which contains a specific mucopeptide as its strengthening element, (p. 21 in Stanier and van Neil 1962) . 

Before a cell can divide, it must essentially double its mass and duplicate all of its contents, so that the two new daughter cells have all the components to initiate their own cycles of cell growth and division. Because the events of nuclear division (mitosis) and cytoplasmic division (cytokinesis) produced dramatic morphologic changes readily seen with the light microscope, earlier studies focused on these relatively brief events. In the time between divisions (interphase), little seemed to be happening. We now know that most of the biochemical events in preparation for division occur continuously throughout interphase. 

A. L. Baker and R. R. Schmidt (1964b). Induced utilization of polyphosphate during nuclear division in synchronously growing Chlorella. Biochim. Biophys. Acta, 93, 180-182. 

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