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  • 1
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Phytochemistry 34 (1993), S. 391-392 
    ISSN: 0031-9422
    Keywords: 28-homoteasterone ; Cruciferae ; Raphanus sativus ; brassinosteroids ; seeds ; teasterone.
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Phytochemistry 36 (1994), S. 175-177 
    ISSN: 0031-9422
    Keywords: 24-epicastasterone ; Beta vulgaris ; Chenopodiaceae ; brassinosteroids ; castasterone ; phytosterols. ; seeds ; triterpenoids
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Phytochemistry 32 (1993), S. 1614-1615 
    ISSN: 0031-9422
    Keywords: 24-epi-castasterone ; GC-mass spectrometry. ; Leguminoseae ; Ornithopus sativus ; brassinosteroids ; castasterone ; seeds
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Phytochemistry 30 (1991), S. 364-365 
    ISSN: 0031-9422
    Keywords: Brassicaceae ; Raphanus sativus ; brassinolide. ; brassinosteroids ; castasterone ; seeds
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Phytochemistry 33 (1993), S. 506-507 
    ISSN: 0031-9422
    Keywords: 7-hydroxysterols. ; 7-oxosterols ; Leguminoseae ; Ornithopus sativus ; seeds ; sterols ; β-amyrin
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Computing 36 (1986), S. 335-342 
    ISSN: 1436-5057
    Keywords: 65D07 ; 41A15 ; 90C20 ; Convexity conditions ; weakly coupled system of inequalities ; numerical algorithms ; quadratic programming ; unconstrained dual program with tridiagonal Hessian
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science
    Description / Table of Contents: Zusammenfassung Während die Aufgabe der konvexen Interpolation im Falle kubischer Splines im allgemeineen nicht lösbar ist, kann jetzt gezeigt werden, daß sie bei Verwendung von Exponentialsplines Lösungen besitzt sofern die vorkommenden Parameter hinreichend roß sind, und es werden konkrete hinreichende und notwendige Lösbarkeitsbedingungen hergeleitet. Da eindeutige Lösbarkeit in der Regel nicht vorliegt, wird eine Auswahlfunktion eingeführt und das entstehende quadratische Optimierungsproblem nach Dualisierung numerisch behandelt.
    Notes: Abstract Sufficient and necessary conditions are derived under which interpolating splines are convex if the data set is in convex position. In order to select one of the interpolants, by means of a well-known objective function a quadratic optimization problem is stated which can be solved effectively by passing to a dual program.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Computing 35 (1985), S. 219-229 
    ISSN: 1436-5057
    Keywords: 65K05 ; 65D07 ; 90C20 ; 41A15 ; Existence conditions ; quadratic programming ; dual optimization problem ; tridiagonal Hessian ; Newton's method
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science
    Description / Table of Contents: Zusammenfassung Das Problem, konvexe Interpolationssplines mit minimaler mittlerer Krümmung zu ermitteln, führt auf eine speziell strukturierte quadratische Optimierungsaufgabe. In der vorliegenden Note wird eine zugehörige duale Aufgabe aufgestellt, die ohne Nebenbedingungen auskommt, deren Zielfunktion stückweise quadratisch ist und die daher eine effektive numerische Behandlung erlaubt.
    Notes: Abstract The problem of finding convex spline interpolants with minimal mean curvature leads to a quadratic optimization problem of special structure. In the present note a corresponding dual problem without constraints is derived. Its objective function is piecewise quadratic and therefore admits an effective numerical treatment.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Springer
    Computing 39 (1987), S. 133-140 
    ISSN: 1436-5057
    Keywords: 65D10 ; 41A15 ; 90C20 ; Specially structured optimization problem ; Fenchel dualization ; return-formula
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science
    Description / Table of Contents: Zusammenfassung Es wird die Aufgabe betrachtet, eine vorgegebene Datenmenge durch konvexe kubischeC 1-Splines zu approximieren. Zu diesem Problem wird eine zugehörige duale Optimierungsaufgabe konstruiert, welche den Vorteil hat, daß keine Nebenbedingungen auftreten, und welche sich daher effektiver als das Ausgangsproblem numerisch behandeln läßt.
    Notes: Abstract In the present paper the problem of approximating given data sets by convex cubicC 1-splines is considered. To this programming problem a dual program is constructed which is unconstrained. Therefore an efficient computational treatment is possible.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 578 (1989), S. 81-88 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: On Phosphole Complexes of 3d Transition MetalsThe 2-ethoxy-, 2-cyclohexanoxy-, 2-phenoxy-, 2-(4′-methylphenoxy)- and 2-(4′-chlorphenoxy)-benzo[1,3,2]-dioxaphospholcomplexes of chromium(III), iron(II), cobalt(II), and nickel(II) are synthesized and characterized by N.M.R., I.R. and U.V.-VIS spectroscopy and by magnetic investigations. When titanium(IV) ore copper(II) halides are used redox-reactions can be observed. The corresponding copper(I) complexes are isolated.
    Notes: Es werden 2-Ethoxy-, 2-Cyclohexanoxy-, 2-Phenoxy-, 2-(4′-Methylphenoxy)- und 2-(4′-Chlorphenoxy)benzo[1,3,2]dioxaphospholkomplexe des Chrom(III), Eisen(II), Cobalt(II) und Nickel(II) synthetisiert und mittels NMR-, IR- und UV-VIS-Spektroskopie sowie durch magnetische Untersuchungen charakterisiert. Im Falle des Titan(IV) und des Kupfer(II) werden Redoxreaktionen beobachtet, es werden entsprechende Kupfer(I)-Komplexe isoliert und im Falle des 2-(4′-Chlorphenoxy)-benzol[1,3,2]dioxaphospholliganden der Kupfer(II)-Komplex nachgewiesen.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 348 (1966), S. 257-260 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: The crystal structure of the modification of TiBr4 stable at 20°C has been determined by X-ray methods. Its lattice is monoclinic, space group C2h5=P 21/c, with \documentclass{article}\pagestyle{empty}\begin{document}$$ {\rm a}_0 \, = \,10.17\,{\rm {\AA}};\,\,\,{\rm b}_{\rm 0} \, = \,7.09\,{\rm {\AA}};\,\,\,\,{\rm c}_{\rm 0} \, = \,10.41\,{\rm {\AA}};\,\,\beta \, = \,101^ \circ 58' $$\end{document}.The structure is an isotype of that of SnBr4.
    Notes: Die Kristallstruktur der bei 20°C stabilen Modifikation des TiBr4 wurde röntgenographisch untersucht. Sie ist monoklin, Raumgruppe C2h5—P 21/c, mit den Gitterkonstanten \documentclass{article}\pagestyle{empty}\begin{document}$$ {\rm a}_0 \, = \,10,17\,{\rm {\AA}};\,\,\,{\rm b}_{\rm 0} \, = \,7,09\,{\rm {\AA}};\,\,\,\,{\rm c}_{\rm 0} \, = \,10,41\,{\rm {\AA}};\,\,\beta \, = \,101^ \circ 58' $$\end{document}.Die Kristallstruktur ist der des SnBr4 isotyp.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
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