kieselguhr - ترجمة إلى فرنسي
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kieselguhr - ترجمة إلى فرنسي

SOFT DIATOMITE VARIETY
Diatomite; Kieselguhr; Tripolite; Novaculit; Diatomaceaous earth; Celite; Kieselgur; Kieselghur; Diatomaceous Earth; Bann clay; Bann Clay; Diatomaceous; Kieselguh; Diatomaccous earth; Diatomas earth; Diomataceous earth; Ceyssatite; Infusorial earth
  • A sample of food-grade diatomaceous earth
  • Individual diatom cell walls often maintain their shape even in commercially processed filter media, such as this one for swimming pools
  • Live marine diatoms from Antarctica (magnified)
  • Scanning electron]] [[micrograph]] of diatomaceous earth

kieselguhr         
n. kieselguhr, siliceous earth, earth which contains the remains of diatoms and is used in the manufacture of dynamite
kieselgur      
n. kieselguhr, siliceous earth, earth which contains the remains of diatoms and is used in the manufacture of dynamite

تعريف

Kieselguhr
·noun Siliceous earth; specifically, porous infusorial earth, used as an absorbent of nitroglycerin in the manufacture of dynamite.

ويكيبيديا

Diatomaceous earth

Diatomaceous earth ( DY-ə-tə-MAY-shəs), diatomite ( dy-AT-ə-myte) or kieselgur/kieselguhr is a naturally occurring, soft, siliceous sedimentary rock that can be crumbled into a fine white to off-white powder. It has a particle size ranging from more than 3 mm to less than 1 μm, but typically 10 to 200 μm. Depending on the granularity, this powder can have an abrasive feel, similar to pumice powder, and has a low density as a result of its high porosity. The typical chemical composition of oven-dried diatomaceous earth is 80–90% silica, with 2–4% alumina (attributed mostly to clay minerals), and 0.5–2% iron oxide.

Diatomaceous earth consists of the fossilized remains of diatoms, a type of hard-shelled microalgae. It is used as a filtration aid, mild abrasive in products including metal polishes and toothpaste, mechanical insecticide, absorbent for liquids, matting agent for coatings, reinforcing filler in plastics and rubber, anti-block in plastic films, porous support for chemical catalysts, cat litter, activator in coagulation studies, a stabilizing component of dynamite, a thermal insulator, and a soil for potted plants and trees as in the art of bonsai.