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  • Inorganic Chemistry  (6)
  • AIDS  (2)
  • Gastrointestinal side effects  (1)
  • IR  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Ocular pseudo-myasthenic reaction induced by interferon in an AIDS patient (1991)
    Springer
    Journal of molecular medicine 69 (1991), S. 930-931 
    Details
    ISSN: 1432-1440
    Keywords: Interferon ; AIDS ; Ocular pseudomyasthenic reaction
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary A 32-year-old, HIV-positive homosexual with Kaposi's sarcoma was given subcutaneous interferon-A (IFN) for two- and a-half months. The patient complained of ocular symptoms (ptosis of the left eyelid and intermittent diplopia) after the application of IFN-A. These symptoms persisted for the period of treatment and subsided after therapy was stopped. However after IFN-A was resumed, ptosis and diplopia recurred. Intensive serological and neurological diagnostic investigations failed to present any reason for these ocular symptoms. From data and the clinical appearance we suppose that in this case the patient suffered a pseudo-myasthenic reaction to IFN-A.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01798543
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  • 2
    Electronic Resource
    Electronic Resource
    Remarkable improvement of neuropsychiatric symptoms in HIV-infected patients after AZT therapy (1991)
    Springer
    Journal of molecular medicine 69 (1991), S. 409-412 
    Details
    ISSN: 1432-1440
    Keywords: HIV ; AIDS ; AZT ; Neuropsychiatric symptoms
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Treatment of neuropsychiatric symptoms with AZT (Azidothymidine) seems to be effective in many AIDS patients. In earlier studies, 204 of 525 patients treated with AZT showed neuropsychiatric improvement. In this presentation, two patients with affective disorder and dementia are described. Both patients showed remarkable improvement of their severe psychiatric symptoms after AZT. The authors recommend treatment of AIDS-associated dementia and psychoorganic symptoms with AZT.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01647415
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  • 3
    Electronic Resource
    Electronic Resource
    Gastrointestinal type 1 hypersensitivity to azathioprine (1990)
    Springer
    Journal of molecular medicine 68 (1990), S. 50-52 
    Details
    ISSN: 1432-1440
    Keywords: Azathioprine ; Type 1 hypersensitivity ; Gastrointestinal side effects
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary We report the case of a 49-year-old patient with progressive sensomotor polyneuropathy who developed nausea, vomiting, and diarrhea after 21/2 months of azathioprine therapy. Administration of the drug was interrupted. These symptoms recurred immediately after rechallenge with azathioprine. A duodenal biopsy demonstrated a massive local eosiniphilia without peripheral blood eosinophilia. Cutane testing with azathioprine showed a positive type 1 reaction. We diagnosed a hypersensitive reaction type 1 in the duodenal mucosa on the basis of the histological features, the history, and the cutane reaction.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01648893
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  • 4
    Electronic Resource
    Electronic Resource
    Synthese von borylgekoppelten Cyclotri- und -tetrasilazanen und viergliedrigen Cycloborasilazanen - Thermischer Abbau zu SiC und BN (1994)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 620 (1994), S. 1093-1098 
    Details
    ISSN: 0044-2313
    Keywords: Cyclosilazanes ; Boryl-bridged Rings ; Crystal Structure ; Pyrolises ; SiC/BN Composites ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Synthesis of Boryl-coupled Cyclotri- and -tetrasilazanes and four-membered Cycloborasilazanes - Thermal Decomposition to SiC and BNDilithiated octamethylcyclotetrasilazane reacts with a difluoroboryl substituted cyclotrisilazane to give the BF coupled 6-8-6-membered cyclosilazane 1, with Me2SiHCl structural isomeric cyclotetra- and cyclotrisilazanes of the type I and II, and with Me3SiCl structural isomeric cyclodisilazanes of the type III and IV are formed. The dilithium derivatives of the cyclosilazanes I and II as well as III and IV react with BF3 and a BF2-substituted cyclotrisilazane to give four-membered cyclo-borasilazanes which are coupled with a cyclodisilazane via a SiMe2-group (2-4). The six-membered cycloborasilazane 5 is a byproduct in the reaction with BF3. The reaction mechanisms are discussed. The pyrolysis with formation of SiC and BN and a crystal structure analysis were carried out with 1.
    Notes: Dilithiiertes Octamethylcyclotetrasilazan reagiert mit einem Difluorboryl-substituierten Cyclotrisilazan zum BF-gekoppelten 6-8-6-gliedrigen Cyclosilazan 1, mit Me2SiHCl zu strukturisomeren Cyclotetra- und Cyclotrisilazanen des Typs I und II und mit Me3SiCl zu strukturisomeren Cyclodisilazanen des Typs III und IV. Die Dilithiumderivate der Cyclosilazane I und II bzw. III und IV reagieren mit BF3 und einem BF2-substituierten Cyclotrisilazan zu viergliedrigen Cycloborasilazanen, die über eine SiMe2-Gruppe mit einem Cyclodisilazan verbunden sind (2-4). In der Reaktion mit BF3 wird als Nebenprodukt das sechsgliedrige Cycloborasilazan 5 isoliert. Die Reaktionsmechanismen werden diskutiert. 1 wird pyrolytisch zu SiC und BN zersetzt. Die Kristallstruktur von 1 wird vorgestellt.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19946200624
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  • 5
    Electronic Resource
    Electronic Resource
    Die Kristall- und Molekülstrukturen von (Me2SiNCN)4 (1) und Me3SiNCNSiMe3 (2) (1994)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 620 (1994), S. 1357-1363 
    Details
    ISSN: 0044-2313
    Keywords: (Me2SiNCN)4 ; Me3SiNCNSiMe3 ; X-Ray ; NMR ; IR ; Raman ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Crystal and Molecular Structures of (Me2SiNCN)4 (1) and Me3SiNCNSiMe3 (2)Synthesis, spectroscopic characterization (NMR, IR, Raman and MS) and crystal structure of the novel compound 1 are described. The molecules form almost planar 16 membered rings with four SiMe2-groups connected to four NCN groups. The corresponding compound 2 exhibits a phase transition from the HT phase 2a to the LT phase 2b at 131 K. Consecutive X-ray structure determinations of the molecular structures of both modifications were performed on a crystal, grown in situ on the diffractometer at 231 K.
    Notes: Für die neuartige Verbindung 1 werden Synthese, spektroskopische Charakterisierung (NMR, IR, Raman und MS) und die Kristallstruktur beschrieben. Das Molekül besteht aus einem nahezu planaren 16gliedrigen Ring, in dem vier SiMe2-Gruppen mit vier NCN-Gruppen verknüpft sind. Die Vergleichsverbindung 2 zeigt eine Phasenumwandlung von der HT-Phase 2a in die TT-Phase 2b bei 131 K. Die Molekülstrukturen beider Modifikationen wurden nacheinander durch Röntgenstrukturanalyse an einem in situ bei 231 K auf dem Diffraktometer gezüchteten Kristall bestimmt.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19946200805
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  • 6
    Electronic Resource
    Electronic Resource
    Cyclosilazane als Precursoren für Si3N4-Keramiken (1991)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 596 (1991), S. 35-46 
    Details
    ISSN: 0044-2313
    Keywords: Cyclosilazanes ; Si3N4 ceramics ; preparation ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Cyclosilazanes as Precursors of Si3N4-CeramicsThe products obtained in the reaction of 1-trimethylsilyl-2,2,4,4,6,6-hexamethylcyclotrisilazane 1 with butyllithium and fluorosilanes depend on the reaction conditions.Lithiated 1 reacts with SiF3N(SiMe3)2 at low temperatures to give the mono- and disubstituted compounds (2, 3) and the 1,3,5,7-tetraaza-2,4,6,8-tetrasilabicyclo-[4.2.0] octane 4. The permethylated bicyclus 5 is formed in the analogous reaction with MeSiF2N(SiMe3)2. At room temperature the monolithium salt of 1 reacts with SiF3N(SiMe3)2 to give the cyclodisilazane 6. 6 forms with butyllithium the lithium derivate 7. 7 reacts with SiF3N(SiMe3)2 to give 8, an isomeric cyclodisilazane of 3. In the reaction of lithiated 1 with Me2SiF2 the silylcoupled cyclodisilazane 9 is obtained, which is a suitable precursor of Si3N4 ceramics.The results of the crystal structure determination of 7 and the results of the pyrolysis of 9 are reported.
    Notes: Die Produktbildung in der Reaktion von 1-Trimethylsilyl-2,2,4,4,6,6-hexamethylcyclotrisilazan 1 mit Butyllithium und Fluorsilanen ist durch die Reaktionsbedingungen steuerbar.Lithiiertes 1 reagiert mit F3SiN(SiMe3)2 bei tiefen Temperaturen unter Bildung der Mono- und Disubstitutionsverbindungen 2, 3 sowie des 1,3,5,7-Tetraaza-2,4,6,8-tetrasilabicyclo [4.2.0] octans 4. Ein permethylierter Bicyclus (5) entsteht in analoger Reaktion mit MeSiF2N(SiMe3)2. Bei Raumtemperatur reagiert das Monolithiumsalz von 1 mit F3SiN(SiMe3)2 unter Kontraktion zum Cyclodisilazan 6. 6 bildet mit Butyllithium das Lithiumderivat 7. 7 reagiert mit F3SiN(SiMe3)2 zu 8, dem zu 3 isomeren Cyclodisilazan. In der Reaktion von lithiiertem 1 mit Me2SiF2 wird das silylverbrückte Cyclodisilazan 9 erhalten, das in Pyrolysereaktionen ein geeignetes Ausgangsmaterial für Si3N4-Keramiken darstellt. Die Resultate der Röntgenstrukturanalyse von 7 und der Pyrolyse von 9 werden mitgeteilt.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19915960106
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  • 7
    Electronic Resource
    Electronic Resource
    Bis(dichlor-N-trimethylsily)cycloaminoalan Kristallstruktur und thermischer Abbau zu Aluminiumnitrid (1991)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 603 (1991), S. 119-127 
    Details
    ISSN: 0044-2313
    Keywords: Dimeric aminoalane ; preparation ; crystal structure ; thermal decomposition ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Bis(dichloro-N-trimethylsilyl)cycloaminoalane - Crystal Structure and Thermal Decomposition to AluminiumnitrideThe dimeric aminoalane II, (me3SiNHAlCl2)2, is obtained in the reaction of aluminium trichloride and HN(Sime3)2. A crystal structure analysis and the pyrolysis with formation of AlN were carried out with II. The decomposition products were measured and characterized as a function of the temperature.
    Notes: Das dimere Aminoalan II, (me3SiNHAlCl2)2, entsteht in der Reaktion von Aluminiumtrichlorid und HN(Sime3)2. Von II wurde eine Kristallstrukturanalyse und eine Pyrolyse unter Bildung von AlN durchgeführt. Die Abspaltprodukte der Pyrolyse wurden temperaturabhängig gemessen und charakterisiert.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19916030116
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  • 8
    Electronic Resource
    Electronic Resource
    Amin-Borane als Precursoren für Borcarbidnitrid (1992)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 610 (1992), S. 83-90 
    Details
    ISSN: 0044-2313
    Keywords: Amine-boranes ; pyrolysis ; boron carbonitrides ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Amine-Boranes as Precursors for Boron CarbonitrideAmine-Boranes have been investigated with respect to their thermal decomposition in the temperature range from rom temperature to 1050°C. The phase transformation of the pyrolytic residue derived from BH3 · C5H5N subsequently heat-treated at temperatures up to 2200°C was studied. The progress of the pyrolysis has been detected by thermal analysis (TGA) and mass spectroscopy. Chemical analysis and ESCA measurements show that the pyrolytic products are single-phase boron carbonitride (BxCyNz) which can be described as a boron and nitrogen containing pyrolytic carbon. This is also supported by means of analytical electron microscopy. Hot pressing of the pyridine-borane-derived BxCyNz at 1800°C and a pressure of 190 MPa yields whiskerlike crystals whose d-values are in accordance with that of BN and/or graphite.
    Notes: Die thermische Zersetzung von Amin-Boranen im Temperaturintervall von Raumtemperatur bis 1050°C sowie die Phasenumwandlung des aus BH3 · C5H5N erhaltenen Rückstands bei Temperaturen bis 2200°C wird untersucht. Der Pyrolyseverlauf wird thermogravimetrisch und massenspektroskopisch verfolgt. Nach elementaranalytischen und photoelektronenspektroskopischen (ESCA) Ergebnissen handelt es sich bei den Zersetzungsprodukten um einphasiges Borcarbidnitrid (BxCyNz), einem Bor und Stickstoff enthaltenden pyrolytischen Kohlenstoff. Dies wird auch durch die analytische Elektronenspektroskopie bestätigt. Durch nachfolgende „Auslagerung“ des aus Pyridin-Boran erhaltenen amorphen BxCyNz in einer Heißpresse bei 1800°C und 190 MPa Druck werden whiskerförmige Kristalle, deren d-Werte auf die Bildung von BN und/oder Graphit hinweisen, erhalten.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19926100114
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  • 9
    Electronic Resource
    Electronic Resource
    Bis(2,4,6-tri-t-butylphenyl)bicyclotetraphosphan (1987)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 551 (1987), S. 85-94 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Bis(2,4,6-tri-t-butylphenyl) bicyclotetraphosphaneThe reaction of white phosphorus with 2,4,6-tri-t-butylphenyllithium and 1-bromo-2,4,6-tri-t-butylbenzene yields bis (2, 4, 6-tri-t-butylphenyl) bicyclotetraphosphane 1 and bis (2, 4, 6-tri-t-butylphenyl) diphosphene 2. 1 is characterized by its nmr and mass spectra. The crystal and molecular structure are described.
    Notes: Bei der Umsetzung von weißem Phosphor mit 2,4,6-Tri-t-butylphenyllithium und 1-Brom-2,4,6-tri-t-butylbenzol entstehen Bis(2,4,6-tri-t-butylphenyl)bicyclotetraphosphan 1 und Bis(2,4,6-tri-t-butylphenyl)diphosphen 2. 1 ist durch seine NMR-und Massenspektren charakterisiert. Die Kristall- und Molekülstruktur werden beschrieben.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19875510809
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