silica nel dizionario PONS

Esempi monolingue (non verificati dalla Redazione di PONS)

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Prior to the mid-1970s, nearly all silica fume was discharged into the atmosphere.
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Various gelling agents are added to give it this property such as aminated bentonite, metallic soaps, or fumed silica.
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These so-called functionalized silica gels are also used in organic synthesis and purification as insoluble reagents and scavengers.
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They are often hardened relative to uncrusted soil due to the accumulation of salts and silica.
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Historically, one of the first successful catalysts was bismuth phosphomolybdate supported on silica as a heterogeneous catalyst.
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While there, he oversaw work on silica gel, phosphates, magnesium and powder metallurgy.
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Each silica tetrahedron shares 3 of its vertex oxygen atoms with other tetrahedra forming a hexagonal array in two-dimensions.
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This erosion released iron and silica into the waters of a new sea.
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The spicules are biologically-formed silica structures, also known as biosilica.
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The initial batch is melted together from silica, copper oxide, and other metal oxides to chemically reduce the copper ions to elemental copper.
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