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nucleus
nucleus
nucleus The large body embedded in the cytoplasm of all eukaryote
cells that contains the genetic material
DNA organized into
chromosomes. The nucleus functions as the control centre of the cell and is bounded by a double membrane (the
nuclear envelope). When the cell is not dividing, a
nucleolus is present in the nucleus and the chromosomal material (
chromatin) is dispersed in the nucleoplasm. In dividing cells the chromosomes become much shorter and thicker and the nucleolus disappears. The contents of the nucleus constitute the nucleoplasm. In certain protozoans there are two nuclei per cell, a
macronucleus (or
meganucleus) concerned with vegetative functions and a
micronucleus involved in sexual reproduction.
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Nucleus Research Launches Equity Research Service With Lazard Freres.
Business Wire; 5/10/2004; 700+ words
; ...BUSINESS WIRE)--May 10, 2004 Nucleus Equity Research Service Equips Investment...for Better Informed Investment Decisions Nucleus Research, a global provider of Return...unbiased technology research and analysis. Nucleus Research is the only analyst firm of its...
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NUCLEUS GOES GOLD AT WORD ENTERTAINMENT.
PR Newswire; 4/13/2000; 700+ words
; :: Leading Music Company Uses Nucleus to Provide Rapid Access to Sales And Inventory...Nasdaq: SNDT) today announced that its Nucleus software has been successfully deployed...used for sales and inventory analysis. Nucleus has been integrated with the Oracle production...
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Nucleus Goes Gold at Word Entertainment.
PR Newswire; 4/13/2000; 700+ words
; Leading Music Company Uses Nucleus to Provide Rapid Access to Sales And...Nasdaq: SNDT) today announced that its Nucleus software has been successfully deployed...for sales and inventory analysis. Nucleus has been integrated with the Oracle...
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Nucleus management with irrigating vectis.(Symposium)
Magazine article from: Indian Journal of Ophthalmology; 1/1/2009; ; 700+ words
; ...to express out the nucleus. This technique is...more than 95% of nuclei in MSICS are extracted...anterior under the nucleus. Visualization of...vectis through the nucleus except in very white and black nuclei avoids pinching of...
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Superdeformed nuclei go for a spin; physicists are head over heels about rapidly rotating, superdeformed nuclei.
Magazine article from: Science News; 5/28/1988; ; 700+ words
; ...explained, superdeformed nuclei are providing a new...inner workings of the nucleus. The superdeformed...to fission, the nucleus must "tunnel" through...excited actinide nuclei, it was determined...fused into a compound nucleus. Using an array...dysprosium-152 nuclei emit in order ...
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Deformed nuclei spit out protons.(new type of proton radioactivity indicates atom's nucleus is flattened)(Brief Article)
Magazine article from: Science News; 3/7/1998; 700+ words
; ...shape of an atom's nucleus. By determining...which the unstable nuclei of two elements...from splitting the nucleus apart. Many nuclei are unstable, however...spherical model of the nucleus failed to fit the...proton-emitting nuclei are fantastic laboratories...
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Positioning of nuclei in Arabidopsis root hairs: An actin-regulated process of tip growth
Magazine article from: Plant Cell; 11/1/2002; ; 700+ words
; ...RESULTS Position of the Nucleus during Root Hair Growth...determine the movement of nuclei in root hairs, timelapse...distance between the nucleus and the apex of growing...position distribution of nuclei in growing versus fully...hairs is displayed. The nucleus remains at a fixed ...
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FDA Approves Nucleus(R) 24 Double Array; Cochlear Implant Designed for Individuals With Ossified Cochlea.
PR Newswire; 6/17/2002; 700+ words
; ...Drug Administration (FDA) approved the Nucleus(R) 24 Double Array cochlear implant...of a single array of electrodes. The Nucleus 24 Double Array, developed in collaboration...be obstructing the passage way. "The Nucleus 24 Double Array is an innovative solution...
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Spinning nuclei to extreme deformity. (researcher Demetrios G. Sarantites and colleagues discover hyperdeformation in gadolinium-147 nuclei)(Brief Article)
Magazine article from: Science News; 7/8/1995; ; 700+ words
; The atomic nucleus is typically pictured...discovered that certain nuclei adopt an elongated...protons, these heavy nuclei radiate gamma rays to...spinning gadolinium-147 nucleus has a sausage shape with...these highly deformed nuclei raises questions about...
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Plant nuclei can contain extensive grooves and invaginations
Magazine article from: Plant Cell; 12/1/2000; ; 700+ words
; ...representations of the nucleus depict a rounded structure...Recently, however, the nuclei of animal cells have...within the animal nucleus remains to be determined. Plant nuclei show numerous structural...territories within the nucleus (Heslop-Harrison...
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Nucleus
Book article from: Genetics
Nucleus The largest of the membrane-bound organelles, the nucleus first was described in 1710 by Antoni van Leeuwenhoek...characterized the organelle in detail, calling it the "nucleus," from the Latin word for "little nut." The nucleus...
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active galactic nucleus
Book article from: A Dictionary of Astronomy
...indicating that it is the nucleus which is the ultimate...First, active galactic nuclei are often highly variable...of an active galactic nucleus are often very broad...signs of activity in the nucleus, but with huge lobes...more active galactic nuclei in the past than there...
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nucleus, cometary
Book article from: A Dictionary of Astronomy
...essentially all its mass. The nucleus of Halley's Comet...with a dark crust; most nuclei are probably smaller...the Sun, a comet's nucleus is inert. Within 3...x2009;% of the nucleus consists of such active...of comets. Pristine nuclei from the Oort Cloud may...
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nucleus, atomic
Book article from: A Dictionary of Astronomy
nucleus, atomic The central...most of its mass. The nuclei of atoms are positively...element. The simplest nucleus is that of the lightest...proton only. All other nuclei also contain one or...not the charge of the nucleus. The most massive...
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hygroscopic nucleus
Book article from: A Dictionary of Earth Sciences
...relative humidity of less than 80%. The size of nuclei may be from 0.001 μm to more than...x3BC;m (i.e. ‘giant’ nuclei such as particles of sea-salt). See also AITKEN NUCLEI ; and NUCLEUS .
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