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sieve pore

См. также в других словарях:

  • pore canal — (Class Ostracoda): Minute tubular passageway extending through shell [McLaughlin, 1980]. (Class Ostracoda): One of variously developed, minute canals extending through valve; opens via pore. (false, normal, radial, sieve type) [Stachowitsch,… …   Crustacea glossary

  • sieve — A meshed or perforated device for separating fine particles from coarser ones. [O.E. sive] molecular s. a gel like material with pore sizes of such ranges as to exclude molecules above certain sizes; used in fractionating or purifying… …   Medical dictionary

  • sieve plate — (Class Ostracoda): Minute, perforated plate covering pore in valve; may be associated with seta [Stachowitsch, 1992] …   Crustacea glossary

  • Molecular sieve — A molecular sieve inside an antibiotics container (contents removed). See below for size comparison image …   Wikipedia

  • water pore — noun a pore that exudes water on the surface or margin of a leaf of higher plants • Syn: ↑hydathode, ↑water stoma • Hypernyms: ↑stoma, ↑stomate, ↑pore * * * noun 1. : a pore by which the …   Useful english dictionary

  • normal pore canals — (Class Ostracoda): Numerous perforations through valve with chemosensory and tactile sensilla, which communicate with nerve cells in the underlying epidermis; may be simple (open) or covered with sieve plates [Cohen, Peterson, and Maddocks, in… …   Crustacea glossary

  • angiosperm — /an jee euh sperrm /, n. Bot. a plant having its seeds enclosed in an ovary; a flowering plant. Cf. gymnosperm. [ANGIO + SPERM] * * * ▪ plant Introduction       any member of the more than 300,000 species of flowering plants (division Anthophyta) …   Universalium

  • Activated carbon — Activated carbon, also called activated charcoal, activated coal or carbo activatus, is a form of carbon that has been processed to make it extremely porous and thus to have a very large surface area available for adsorption or chemical reactions …   Wikipedia

  • 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 0–1, or as a percentage between 0–100%. The term is used in multiple fields including… …   Wikipedia

  • Zeolite — Zeolites (Greek, zein , to boil ; lithos , a stone ) are hydrated aluminosilicate minerals and have a micro porous structure. The term was originally coined in the 18th century by a Swedish mineralogist named Axel Fredrik Cronstedt who observed,… …   Wikipedia

  • Sorption pump — The sorption pump is a vacuum pump that creates a vacuum by adsorbing molecules on a very porous material like molecular sieve which is cooled by a cryogen, typically liquid nitrogen. The ultimate pressure is about 10 2 mbar. With special… …   Wikipedia

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