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  • 1
    Electronic Resource
    Electronic Resource
    Representation of orientation and disorientation data for cubic, hexagonal, tetragonal and orthorhombic crystals (1991)
    [S.l.] : International Union of Crystallography (IUCr)
    Acta crystallographica 47 (1991), S. 780-789 
    Details
    ISSN: 1600-5724
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: A convenient method for the description of orientation data for cubic, hexagonal, tetragonal and orthorhombic crystals is given. The method can also be used for the representation of disorientation data, where disorientations between any two crystals of the specified symmetry lattices are considered. It is based on the quaternion formalism introduced into the discussion of orientations and disorientations by Grimmer [Acta Cryst. (1974), A30, 685–688], Frank [(1987). Proc. Int. Conf. on Texture of Materials 8 (INCOTOM 8), Santa Fé, USA, pp. 3–13] and others. Since orientations and disorientations can be interpreted as rotations which in turn can be represented by only three parameters a vector description is used. These vectors span a rotation space corresponding to the usual space of Eulerian angles. It is called Rodrigues vector space [Rodrigues (1840). J. Math. Pure Appl. 5, 380–440; Becker & Panchanadeeswaran (1989). Text. Microstruct. 10, 167]. The direction of a Rodrigues vector is parallel to the rotation axis and its length is tan (θ/2), where θ describes the rotation angle. A method for selecting a unique representative out of the numerous symmetrically equivalent Rodrigues vectors is given. Since these selection rules depend on the symmetry of the crystal lattices considered they yield compact domains in the Rodrigues vector space which are typical for each type of lattice or lattice pair. These domains are always bounded by planes. Frank (1987) called them fundamental zones and described them for the orientations of cubic, hexagonal and orthorhombic crystals.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0108767391006864
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  • 2
    Electronic Resource
    Electronic Resource
    Long-term observation of chronic subsutaneous administration of lisuride in the treatment of motor fluctuations in parkinson's disease (1992)
    Springer
    Journal of neural transmission 4 (1992), S. 291-301 
    Details
    ISSN: 1435-1463
    Keywords: Parkinson's disease ; continuous lisuride infusion ; motor fluctuations
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Twenty-nine patients with advanced Parkinson's disease were treated with subcutaneous lisuride infusion in addition to a basic therapy consisting of levodopa + PDI in all, and deprenyl in some patients. At the time of the report, 13 patients are still receiving lisuride infusion after 5–36 months, while 16 have dropped out after 0.5–30 months one because of psychosis, three because of insufficient efficacy, three due to death unrelated to treatment, three because of difficulties in handling the pump as outpatients, and six for other reasons. “Off”-periods and parkinsonian disability in “off” and in “on” were reduced significantly. These improvements remained constant throughout the observation period. Once the optimal dose regimen is established, only minor adjustments of the doses of lisuride and levodopa are required in the individual case.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02260078
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  • 3
    Electronic Resource
    Electronic Resource
    Continuous subcutaneous lisuride infusion in OPCA (1992)
    Springer
    Journal of neural transmission 90 (1992), S. 145-150 
    Details
    ISSN: 1435-1463
    Keywords: OPCA ; continuous dopaminergic stimulation ; dopaminergica ; dysphagia ; dysarthria
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Four patients with sporadic olivopontocerebellar atrophy (OPCA) and severe signs of Parkinsonism received continuous subcutaneous lisuride infusion via a small external pump. All 4 patients benefitted from this treatment: 3 showed an overall improvement in motor performance, in 1 patient mainly dysphagia and dysarthria improved. Therapeutic benefit lasted for at least 6 months of follow up. With a daily dose of 1.0 mg of subcutaneous lisuride, treatment limitations were reached in the form of dysphagia, probably due to oropharyngeal dystonia. Subcutaneous lisuride infusion should be taken into consideration in OPCA patients with signs of Parkinsonism if oral dopaminergic treatment has failed earlier on.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01250796
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  • 4
    Electronic Resource
    Electronic Resource
    On the correlation of implantation defects and implanted species (1992)
    Springer
    Microchimica acta 107 (1992), S. 179-187 
    Details
    ISSN: 1436-5073
    Keywords: silicon ; DLTS ; implantation ; impurity levels ; defects
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Using high-sensitive deep level transient spectroscopy (DLTS), we have determined ion-related defects in monocrystalline silicon in the asimplanted state. In comparison with secondary ion mass spectrometry (SIMS) data and neutron depth profiling (NDP) results it is demonstrated that the defect profiles and the chemical distributions have nearly identical shape. From these experimental facts it can be concluded that this electrical spectroscopy can be applied for the detection of very low concentrations (down to 1010 cm−3) of implanted ion species.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01244471
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  • 5
    Electronic Resource
    Electronic Resource
    Struktur der Triarymethyl-Dimeren (1970)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 103 (1970), S. 1101-1106 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Structure of Triarylmethyl DimersStructure 3 is confirmed for the dimer of triphenylmethyl (1) by 13C. n.m.r. spectra of [α-13C]triphenylmethyl dimer, the synthesis of which is described. The interpretation given for the proton resonance of 1-dimer2 is also supported by the 1H. n.m.r. spectrum of tris-(4-deuterophenyl)methyl dimer. However, for 9-phenylfluorenyl dimer the hexaarylethane structure 4 is proposed on the basis of the 1H. n.m.r. spectrum.
    Notes: 13C-NMR-Spektren des [α-13C]Triphenylmethyl-Dimeren, dessen Synthese beschrieben wird, beweisen die Struktur 3 für das dimere Triphenylmethyl (1). Das 1H-NMR-Spektrum des Tris-[4-deutero-phenyl]-methyl-Dimeren bestätigt ebenfalls die Interpretation der Protonenresonanz des 1-Dimeren2 im Sinne der Formel 3. Für das 9-Phenyl-fluorenyl-Dimere wird dagegen auf Grund des 1H-NMR-Spektrums die Struktur eines echten Hexaaryläthans 4 vorgeschlagen.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19701030414
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  • 6
    Electronic Resource
    Electronic Resource
    Zur Konjugation in makrocyclischen Bindungssystemen, XVIII. Benzo[12]annulene: 5.6.11.12-Tetradehydro-tribenzo[a.e.i]cyclododecen, 11.12.15.16-Tetradehydro-dibenzo[a.e]cyclododecen und 5.6.11.12.15.16-Hexadehydro-dibenzo[a.e]cyclododecen (1970)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 103 (1970), S. 1157-1167 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Conjugation in Macrocyclic Systems, XVIII. Benzo[12]annulenes: 5,6,11,12-Tetradehydrotribenzo[a,e,i]cyclododecene, 11,12,15,16-Tetradehydrotribenzo[a,e]cyclododecene and 5,6,11,12,15,16-Hexadehydrodibenzo[a,e]cyclododeceneThe syntheses of the title compounds 2, 6 and 5 are reported. In 2 and 6 the resonance of the inner olefinic hydrogen is shifted to τ -0.1 and τ -0.5. The relevance of this finding for the assumption of an induced paramagnetic ring current in the geometrically analogous monocyclic dehydro[12]annulene 4 is discussed.
    Notes: Über die Synthese der Titel-Verbindungen 2, 6 und 5 wird berichtet. Bei 2 und 6 ist die Resonanz des inneren olefinischen Protons durch den Anisotropie-Effekt der beiden Drei-fachbindungen bis τ -0.1 bzw. τ -0.5 verschoben. Die Relevanz dieses Befundes für die Annahme eines induzierten paramagnetischen Ringstroms in dem geometrisch analogen monocyclischen Dehydro [12]annulen 4 wird diskutiert.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19701030418
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  • 7
    Electronic Resource
    Electronic Resource
    Intramolekulare Wechselwirkungen zwischen Dreifachbindungen, XII. 2.2′-Bis-[alkin-(1)-yl]-biphenyle (1972)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 105 (1972), S. 2310-2319 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Intramolecular Interactions of Triple Bonds, XII. 2.2′-Bis(1-alkynyl)biphenylsThe preparation of 2.2′-diethynylbiphenyl (2, R = H) was achieved by double Wittig reaction from 2.2′-bis(bromomethyl)biphenyl via 2.2′-divinylbiphenyl which by bromine addition and elimination of hydrogen bromide yielded 2 (R = H). Two other syntheses of 2 (R = H) are reported. 2 (R = H) reacted with hydrogen bromide under cross-linkage of the triple bonds to 9.10-bis(bromomethyl)phenanthrene (6). By catalytic hydrogenation 9.10-dimethylphenanthrene (5) was obtained in small yields in addition to the normal hydrogenation product 4.2.2′-Bis(1-propynyl)biphenyl (2, R = CH3) and the cyclic diacetylenes 3 (n = 2, 3 and 4) were obtained from 2 (R = H) via the dilithium acetylide by alkylation with the corresponding alkyl iodides.For 3 (n = 2) the potential barrier for the ring inversion was determined from temperature dependent 1H n.m.r. to be 17.9 ± 0.2 kcal/mole at TC = 87° (in 1-chloronaphthalene). The conformational stability of 3 (n = 2) is discussed in comparison to 1.
    Notes: Zur Darstellung von 2.2′-Diäthinyl-biphenyl (2, R = H) wurde durch doppelte Wittig-Reaktion aus 2.2′-Bis-brommethyl-biphenyl und Formaldehyd 2.2′-Divinyl-biphenyl dargestellt, das durch Brom-Addition und Bromwasserstoff-Eliminierung 2 (R = H) ergab. Zwei weitere Synthesen von 2 (R = H) werden angegeben. 2 (R = H) reagierte bei der Bromwasserstoff-Addition unter Wechselwirkung der Dreifachbindungen zu 9.10-Bis-brommethyl-phenanthren (6). Ebenso entstand bei der katalytischen Hydrierung neben dem normalen Hydrierungsprodukt 4 in geringer Ausbeute 9.10-Dimethyl-phenanthren (5).Aus 2 (R = H) wurden über das Dilithiumacetylid durch Alkylierung mit den betreffenden Alkyljodiden 2.2′-Bis-[propin-(1)-yl]-biphenyl (2, R = CH3) und die cyclischen Diacetylene 3 (n = 2, 3 und 4) erhalten.Aus der Temperaturabhängigkeit des 1H-NMR-Spektrums wurde für 3 (n = 2) die Potentialbarriere für die Ringinversion zu 17.9 ± 0.2 kcal/Mol bei TC = 87° (in 1-Chlor-naphthalin) bestimmt. Die konformative Stabilität von 3 (n = 2) im Vergleich zu 1 wird diskutiert.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19721050724
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  • 8
    Electronic Resource
    Electronic Resource
    Großtechnische Lichtbogenöfen zur Stahl-ErzeugungVortrag auf der Tagung der GDCh-Fachgruppe „Angewandte Elektrochemie“, 4. u. 5. Okt. 1973 in Ludwigshafen/Rh. (1974)
    Weinheim : Wiley-Blackwell
    Chemie Ingenieur Technik - CIT 46 (1974), S. 136-138 
    Details
    ISSN: 0009-286X
    Keywords: Chemistry ; Industrial Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Es wird der Stand der Technik des Elektrostahlverfahrens aufgezeigt. Durch Einführung des UHP-Prinzips („Ultra High Power“ oder„ Ultra High Productivity“) wurde der Bau großer, leistungsstarker Ofeneinheiten ermöglicht, und wird es in Zukunft gelingen, neben legierten Stählen und Edelstählen in zunehmendem Maße Massenstähle sehr wirtschaftlich zu erzeugen. Elektrostahlwerke können außerdem wirksam zur Beseitigung von Konsumschrott beitragen. Zukunftsaspekte des Verfahrens liegen in der Kontichargierung der Öfen, in der Steuerung der Öfen durch Prozeßrechner, der Verwendung von direktreduzierten Eisenerzen sowie der Kopplung mit Hochtemperaturreaktoren.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cite.330460406
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  • 9
    Electronic Resource
    Electronic Resource
    Ein „intramolekulares Chinhydron“ (1973)
    Weinheim : Wiley-Blackwell
    Zeitschrift für die chemische Industrie 85 (1973), S. 831-832 
    Details
    ISSN: 0044-8249
    Keywords: Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ange.19730851818
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  • 10
    Electronic Resource
    Electronic Resource
    Cyclooctadeca [cdefg] phenanthren („[18] Annuleno [cdefg] phenanthren“) (1973)
    Weinheim : Wiley-Blackwell
    Zeitschrift für die chemische Industrie 85 (1973), S. 957-958 
    Details
    ISSN: 0044-8249
    Keywords: Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ange.19730852107
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