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Nuclear pore, a large protein complex that penetrates the nuclear envelope in eukaryotic cells; Ion channel pore, the ion-selective opening in the membrane of a eukaryotic cell formed by members of the ion channel family of proteins
Porosity or void fraction is a measure of the void (i.e. "empty") spaces in a material, and is a fraction of the volume of voids over the total volume, between 0 and 1, or as a percentage between 0% and 100%.
Micro CT of porous medium: Pores of the porous medium shown as purple color and impermeable porous matrix shown as green-yellow color. Pore structure is a common term employed to characterize the porosity, pore size, pore size distribution, and pore morphology (such as pore shape, surface roughness, and tortuosity of pore channels) of a porous medium.
Pores that are too small to be penetrated by most microorganisms. Organic matter in these pores is therefore protected from microbial decomposition. They are filled with water unless the soil is very dry, but little of this water is available to plants, and water movement is very slow. [5] [3] Size <0.1 μm. [4]
Acne is a skin condition characterized by clogged pores. When pores get clogged, it causes red lesions — which you know as pimples — to form on the face or other areas of the body, especially ...
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]