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The cell nucleus (from Latin nucleus or nuculeus 'kernel, seed'; pl.: nuclei) is a membrane-bound organelle found in eukaryotic cells. Eukaryotic cells usually have a single nucleus, but a few cell types, such as mammalian red blood cells , have no nuclei , and a few others including osteoclasts have many .
The medullary command nucleus (MCN), also called the pacemaker nucleus, is a group of nerve cells found in the bodies of weakly electric fish. It controls the function of electrocytes by regulating the frequency of electrical impulses .
The nucleus bead in a beaded cultured pearl is generally a polished sphere made from freshwater mussel shell. Along with a small piece of mantle tissue from another mollusk (donor shell) to serve as a catalyst for the pearl sac, it is surgically implanted into the gonad (reproductive organ) of a saltwater mollusk. In freshwater perliculture ...
Aquaculture fish farming in the Estero de Castro inlet of Chiloé Island Mussel aquaculture farming in the fjords of southern Chile Aquaculture is a major economic activity in Chile . Among the diverse aquacultures practised in Chile, Atlantic salmon aquaculture is by far the largest sector.
A New Hampshire group wants to be the first to bring offshore fish farming to the waters off New England by raising salmon and trout in open-ocean pens miles from land, but critics fear the plan ...
Two years after finally being identified, the "Boy in the Box" case continues to haunt Philadelphia. The slain body of Joseph Augustus Zarelli, 4, was discovered in February 1957 in Philadelphia's ...
The Daily Weather Update from FOX Weather: Tropical trouble ...
Saltwater fish generally fetch a higher market price than freshwater fish which makes for an economic incentive over traditional aquaponics systems. [6] It was also found that half pearls could be grown in cultured giant abalone in 5 months after a pearl nucleus was inserted into them. The shells can also be used for mother of pearl work. [2]