talc

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talc

The Columbia Encyclopedia, Sixth Edition | 2008 | The Columbia Encyclopedia, Sixth Edition. Copyright 2008 Columbia University Press. (Hide copyright information) Copyright

talc mineral ranging in color from white through various shades of gray and green to the red and brown of impure specimens, translucent to opaque, and having a greasy, soapy feel. It is a hydrous silicate of magnesium, Mg 3 Si 4 O 10 (OH) 2 , and usually contains small quantities of nickel, iron, and aluminum as impurities. It occurs commonly in folia (thin layers), but is also found in coarsely granular, finely granular, or cryptocrystalline masses. Soapstone , or steatite, is a massive, granular form of talc. French chalk is a fine-grained variety. Talc is usually associated with chlorite schists, serpentine, dolomite, and other metamorphic rocks; it is apparently a secondary mineral formed by the alteration of other magnesium silicates. There are important deposits of talc in Austria, Italy, France, and Canada and in the United States in California, North Carolina, Texas, Georgia, and Montana. Talc is used in making paper (as a filler), paints, face and talcum powder, soap, fireproof roofing, foundry facings, lubricants, linoleum and oilcloth, electrical insulation, and pottery.

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talc

A Dictionary of Nursing | 2008 | © A Dictionary of Nursing 2008, originally published by Oxford University Press 2008. (Hide copyright information) Copyright

talc (tal'k) n. a soft white powder consisting of magnesium silicate, used as a dusting powder.

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talc

The Oxford Pocket Dictionary of Current English | 2009 | © The Oxford Pocket Dictionary of Current English 2009, originally published by Oxford University Press 2009. (Hide copyright information) Copyright

talc / talk/ • n. talcum powder. ∎  a white, gray, or pale green soft mineral with a greasy feel, occurring as translucent masses or laminae and consisting of magnesium hydroxyl silicate. • v. (talced, talc·ing) [tr.] powder or treat (something) with talc. DERIVATIVES: talc·ose / ˈtalkōs/ adj. ( Geol. ). talc·y / ˈtalkē/ adj.

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Talc pleurodesis; acute normovolemic hemodilution; laparoscopic cholecystectomy; blood ultrafiltration.(EVIDENCE FOR PRACTICE)(Disease/Disorder overview)
Magazine article from: AORN Journal; 2/1/2007; ; 700+ words ; Pleurodesis using talc poudrage versus talc slurry European Journal of Cardio-thoracic Surgery December...Corynebacterium parvum, quinacrine, tetracycline, iodopovidone, and talc, numerous clinical studies have been published supporting the...
Talc: shape and form meet function.
Magazine article from: Paint & Coatings Industry; 1/1/2003; ; 700+ words ; ...a natural blend of talc, tremolite, serpentine...anthophyllite. Platy talcs can be further classified...chlorite in order for a talc product to attain...fineness. Tremolitic talcs exploit the properties...together with the talc. The platy talcs used by the coatings...
Talc for Pleurodesis? (editorial).
Magazine article from: Chest; 11/1/2002; ; 700+ words ; At the present time, talc is the agent for pleurodesis that is preferred...The reason for this preference is that talc, administered either by an aerosol...however, remain about the safety of talc. The primary worry is the observation...
Talc Preparations Used for Pleurodesis Vary Markedly From One Preparation to Another(*).
Magazine article from: Chest; 6/1/2001; ; 700+ words ; Background: At the present time, talc is the one of the agents most commonly...after the intrapleural administration of talc. The incidence of pneumonitis has varied...compare the physical characteristics of talc used for the production of pleurodesis...
Talc and Pyrophyllite
Magazine article from: Mining Engineering; 6/1/2001; ; 700+ words ; ...G.P. TOMAINO, Minerals Technologies Talc is a layered, hydrous magnesium silicate...soapy feel and typically a smooth texture. Talc is also known for its insulation, heat...absorption and strong covering quality. Talc, Mg^sub 3^Si^sub 4^O^sub 10...
Talc pleurodesis for the treatment of pneumothorax and pleural effusion.
Magazine article from: Chest; 10/1/1994; ; 700+ words ; ...Words: pleurodesis; poudrage; slurry; talc Early interest in the development of pleural...been renewed interest in bleomycin and talc as well as new investigation of tetracycline...pleurodesis(7)(8)(9) and low cost, talc has received substantial attention recently...
Talc and pyrophyllite
Magazine article from: Mining Engineering; 6/1/2000; ; 700+ words ; Talc is a layered, hydrous, magnesium-silicate...soapy feel and typically a smooth texture. Talc is known for its insulation, heat resistance...Pyrophyllite has physical properties similar to talc. Talc, Mg^sub 3^Si^sub 4^O^sub...
TALC AND PYROPHYLLITE
Magazine article from: Mining Engineering; 6/1/2005; ; 700+ words ; Talc is a layered, hydrous magnesium silicate...soapy feel and typically a smooth texture. Talc is also known for its insulation, heat resistance...oil absorption and strong covering quality. Talc, Mg^sub 3^Si^sub 4^O^sub 10...
Talc pleurodesis: A new technique
Magazine article from: The American Surgeon; 5/1/2001; ; 700+ words ; ...Although several chemical agents are used talc has only recently been advocated as the sclerosing agent of choice. Talc can be administered via open thoracotomy...technique of thoracoscopically applied talc pleurodesis that is easy, inexpensive...
Talc for pleurodesis: hero or villain? .(Letter to the Editor)
Magazine article from: Chest; 7/1/2003; 700+ words ; ...its editorial (2) (December 2002). Talc has been considered the most effective...Fraticelli et al (1) using calibrated talc (95% of particles > 5 [micro]m) and observing that the migration of talc, if it occurs, it is not significant...

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