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Infantile fibrosarcoma: radiological and clinical features (1994)

Vinnicombe, S. J. ; Hall, C. M.

Springer

Skeletal radiology 23 (1994), S. 337-341

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ISSN: 1432-2161

Keywords: Infantile Fibrosarcoma ; Computed tomography ; Magnetic resonance imaging

Source: Springer Online Journal Archives 1860-2000

Topics: Medicine

Notes: Abstract Two cases of infantile fibrosarcoma are described. This rare childhood malignancy of mesodermal origin usually affects the lower limbs, as it did in both of our cases. Previously, the only treatment option available involved some form of radical and often mutilating surgery. More recently, combination chemotherapy has given good results, with the effect that various imaging modalities have become important in assessing both the initial extent of disease and the response to treatment. Computed tomography has the advantage of demonstrating the amount of osseous involvement, but at the expense of a considerable dose of ionizing radiation. On the other hand, magnetic resonance imaging, with its multiplanar capacity, gives superior demonstration of breaching of tissue planes, which has important implications for planning of surgery. However, as in other soft tissue tumours, changes in signal characteristics with treatment have proved less specific than was originally anticipated.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/BF02416988

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Striking selectivity of anion incorporation into polypyrrole by competitive doping: perchlorate versus hexafluorophosphate (1994)

Walton, D. J. ; Hall, C. E. ; Mure, J. M. ; [et al.]

New York, NY : Wiley-Blackwell

Polymers for Advanced Technologies 5 (1994), S. 586-590

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ISSN: 1042-7147

Keywords: Conducting polymer ; Polypyrrole ; Competitive doping ; Anion selectivity ; Perchlorate ; Hexafluorophosphate ; Chemistry ; Polymer and Materials Science

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics

Notes: In the electro-oxidative preparation of polypyrrole films from electrolyte media containing both perchlorate and hexafluorophosphate anions a striking selectivity towards ClO4 was observed, with a three-fold preference for this anion in films from aqueous medium and a greater than ten-fold preference from MeCN. This result is of benefit towards the production of polypyrroles containing complex functionalized dopant anions, since the presence of PF6 to bolster electrolysis parameters will less readily carry over into the final polymer. PF6 is particularly useful for this purpose in MeCN, where ClO4 is inappropriate, being itself too readily incorporated into the polymer from this solvent system.

Additional Material: 1 Ill.