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A nucleus typically contains between one and ten compact structures called Cajal bodies or coiled bodies (CB), whose diameter measures between 0.2 μm and 2.0 μm depending on the cell type and species. [35] When seen under an electron microscope, they resemble balls of tangled thread [36] and are dense foci of distribution for the protein ...
A model of an atomic nucleus showing it as a compact bundle of protons (red) and neutrons (blue), the two types of nucleons.In this diagram, protons and neutrons look like little balls stuck together, but an actual nucleus (as understood by modern nuclear physics) cannot be explained like this, but only by using quantum mechanics.
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A nucleus with full shells is exceptionally stable, as will be explained. As with electrons in the electron shell model, protons in the outermost shell are relatively loosely bound to the nucleus if there are only few protons in that shell, because they are farthest from the center of the nucleus. Therefore, nuclei which have a full outer ...
it is a version without text of the File:Diagram human cell nucleus.svg: Date: 17 jun 2006 (original 27 april 2006) Source: edited with adobe ilustrator: Author: Mariana LadyofHats: Permission (Reusing this file)
8th shell: 58 states (n = 6, j = 1 / 2 , 3 / 2 , 5 / 2 , 7 / 2 , 9 / 2 or 11 / 2 ; n = 7, j = 15 / 2 ). and so on. Note that the numbers of states after the 4th shell are doubled triangular numbers plus two .
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The nuclear pore complex (NPC) is a crucial cellular structure with a diameter of approximately 120 nanometers in vertebrates. Its channel varies from 5.2 nanometers in humans [14] to 10.7 nm in the frog Xenopus laevis, with a depth of roughly 45 nm. [15] Additionally, mRNA, being single-stranded, has a thickness ranging from 0.5 to 1 nm.