thorium dioxide

thorium dioxide
thorium dioxide n a refractory crystalline compound obtained usu. as a dense white powder and formerly used as a contrast medium in radiography called also thorium oxide, thorotrast

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a contrast medium formerly used in radiography of the alimentary tract; its use was discontinued after it was linked to hepatic angiosarcoma.

Medical dictionary. 2011.

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  • Thorium dioxide — IUPAC name Thorium dioxide Thorium(IV) oxide …   Wikipedia

  • thorium dioxide — torio(IV) oksidas statusas T sritis chemija formulė ThO₂ atitikmenys: angl. thorium dioxide; thorium(IV) oxide rus. тория двуокись; тория диоксид; тория(IV) оксид ryšiai: sinonimas – torio dioksidas …   Chemijos terminų aiškinamasis žodynas

  • thorium dioxide — noun see thorium oxide …   Useful english dictionary

  • Thorium — (pronEng|ˈθɔːriəm) is a chemical element with the symbol Th and atomic number 90. As a naturally occurring, slightly radioactive metal, it has been considered as an alternative nuclear fuel to uranium.CharacteristicsWhen pure, thorium is a… …   Wikipedia

  • thorium — thoric /thawr ik, thor /, adj. /thawr ee euhm, thohr /, n. Chem. a grayish white, lustrous, somewhat ductile and malleable, radioactive metallic element present in monazite: used as a source of nuclear energy, as a coating on sun lamp and vacuum… …   Universalium

  • Thorium fuel cycle — The thorium fuel cycle is a nuclear fuel cycle that uses thorium 232 as fertile material and uranium 233 as fissile fuel. A major advantage of the thorium fuel cycle is that production of plutonium and other long lived actinides as radioactive… …   Wikipedia

  • thorium processing — Introduction       preparation of the ore for use in various products.       Thorium (Th) is a dense (11.7 grams per cubic centimetre), silvery metal that is softer than steel. It has a high melting temperature of approximately 1,750° C (3,180°… …   Universalium

  • thorium(IV) oxide — torio(IV) oksidas statusas T sritis chemija formulė ThO₂ atitikmenys: angl. thorium dioxide; thorium(IV) oxide rus. тория двуокись; тория диоксид; тория(IV) оксид ryšiai: sinonimas – torio dioksidas …   Chemijos terminų aiškinamasis žodynas

  • thorium oxide — noun or thorium dioxide : a refractory crystalline compund ThO2 obtained usually as a dense white powder by igniting thorium nitrate and used chiefly in incandescent gas mantles, in crucibles and refractories, in silica free optical glass, and in …   Useful english dictionary

  • thoriumdioxide — thorium dioxide n. A heavy white powder, ThO2, obtained from monazite and used mainly in ceramics, glass, and gas mantles and as a catalyst. Also called thoria. * * * …   Universalium

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