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  • 1
    Electronic Resource
    Electronic Resource
    Endoanal ultrasonography in the follow-up of anal carcinoma (1994)
    Springer
    Surgical endoscopy and other interventional techniques 8 (1994), S. 1186-1189 
    Details
    ISSN: 1432-2218
    Keywords: Anal carcinoma ; Endoanal sonography ; Staging ; Follow-up
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract As the modern treatment for anal carcinoma is either radiotherapy alone or combined radiochemotherapy, an exact histological staging is impossible. Therefore we have to depend on an accurate preoperative staging method. Endoanal ultrasonography enables imaging of the normal anal canal and its pathologies. In a prospective investigation we were able to confirm the histological proven diagnosis of an anal epidermoid carcinoma in 12 patients with a 10-MHz transducer covered with a sonolucent plastic cone. The depth of infiltration can be determined in relation to the normal layers of the anal canal. Six patients treated with radiotherapy alone or combined radiochemotherapy were followed and the success or failure of the treatment was documented. Endosonography of the anal canal allows an exact staging of a primary anal carcinoma and the follow-up in irradiated carcinomas. Besides digital palpation and proctoscopy with biopsy, endosonography complements the preoperative staging of anal carcinomas.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00591047
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  • 2
    Electronic Resource
    Electronic Resource
    Generation and investigation of various (alkylamino)phenylsilyllithium species - behaviour in coupling reactions with chlorosilanesDedicated to Professor G. Marx on the Occasion of his 60th Birthday (1998)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 340 (1998), S. 557-561 
    Details
    ISSN: 0941-1216
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The partially diethylamino substituted phenyl-chloromono- and -disilanes Cl2Ph(NEt2)Si(2) Cl2Ph(NEt2)2Si(3), [ClPh(NEt2)Si-]2 (7) and Cl(NEt2)PhSi—SiPh(NEt2)2 (8) were synthesized. 3 and 8 are able to react with lithium powder to form the corresponding silyllithium compounds. The resulting species were characterized in solution by 13C and 29Si NMR spectroscopy. To prove the expected substitution patterns of the silyllithium compounds some coupling reactions with chlorosilanes were carried out and the resulting new oligosilanes were characterized by means of NMR spectroscopy and MS.
    Additional Material: 3 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19983400609
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  • 3
    Electronic Resource
    Electronic Resource
    Darstellung und Charakterisierung oligomeree und polymerer Ethinylsilane mit Si2—Si4-Einheiten (1997)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 339 (1997), S. 603-606 
    Details
    ISSN: 0941-1216
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Preparation and Characterization of Oligomeric as well as Polymeric Ethynylsilanes Containing Si2—Si4 UnitsThe treatment of methylchlorodisilanes with ethynyldigrignard (BrMgC≡CMgBr) resulted in oligomeric as well as polymeric ethynyldisilanes. The kind of this products is related to the chloro functionality of the starting disilane. The reaction of SiClMe(SiCl2Me)2 as well as SiMe(SiCl2Me)3 yielded polymers beside small amounts of the monomeric products (HC≡C)MeSi[SiMe(C≡CH)2]2 and MeSi[SiMe(C≡CH)2]3.
    Additional Material: 5 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.199733901108
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