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  • 1
    Electronic Resource
    Electronic Resource
    Transcription mapping of the Ori L region reveals novel precursors of mature RNA species and antisense RNAs in rat mitochondrial genome
    Amsterdam : Elsevier
    FEBS Letters 296 (1992), S. 311-316 
    Details
    ISSN: 0014-5793
    Keywords: Antisense RNA ; Mitochondrial DNA ; Regulation ; Replication ; Transcript processing
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0014-5793(92)80311-4
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  • 2
    Electronic Resource
    Electronic Resource
    Real-space multigrid methods for large-scale electronic structure problems (1997)
    New York, NY : Wiley-Blackwell
    International Journal of Quantum Chemistry 65 (1997), S. 531-543 
    Details
    ISSN: 0020-7608
    Keywords: Chemistry ; Theoretical, Physical and Computational Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: We describe the development and applications of a new electronic structure method that uses a real-space grid as a basis. Multigrid techniques provide preconditioning and convergence acceleration at all length scales and therefore lead to particularly efficient algorithms. The salient points of our implementation include: (i) new compact discretization schemes in real space for systems with cubic, orthorhombic, and hexagonal symmetry and (ii) new multilevel algorithms for the iterative solution of Kohn-Sham and Poisson equations. The accuracy of the discretizations was tested by direct comparison with plane-wave calculations, when possible, and the results were in excellent agreement in all cases. These techniques are very suitable for use on massively parallel computers and in O(N) methods. Tests on the Cray-T3D have shown nearly linear scaling of the execution time up to the maximum number of processors (512). The above methodology was tested on a large number of systems, such as the C60 molecule, diamond, Si and GaN supercells, and quantum molecular dynamics simulations for Si. Large-scale applications include a simulation of surface melting of Si and investigations of electronic and structural properties of surfaces, interfaces, and biomolecules.   © 1997 John Wiley & Sons, Inc. Int J Quant Chem 65: 531-543, 1997
    Additional Material: 10 Ill.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Structural researches on nitrato complexes of organotin compounds; The crystal and molecular structures of Nitratotriphenylstannyltin(II) and Nitratotris(triphenyl-stannyl)tin(IV) (1977)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 431 (1977), S. 250-260 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Strukturuntersuchungen an Nitratokomplexen von Organo-Zinn-Verbindungen; Kristall- und Molekülstruktur von Nitratotriphenylstannyl-Zinn(II) und Nitratotris(triphenylstannyl)-Zinn(IV)Zwei Nitratokomplexe von Organozinn-Verbindungen wurden isoliert, ihre IR-Spektren aufgenommen und die Röntgenstruktur bestimmt. Beide Verbindungen kristallisieren monoklin (Gitterkonstanten der ersten Verbindung: a = 10,42(1), b = 18,91(2), c = 9,09(1) Å und β = 98,3(1)°, Raumgruppe P21/c, 4 Molekeln in der Elementarzelle; Gitterkonstanten der zweiten Verbindung: a = 19,153(8), b = 13,957(6), c = 17,914(8) Å und β = 95,8(1)°, Raumgruppe P21/c, 4 Molekeln in der Elementarzelle). Die Struktur beider Verbindungen wurde mittels Röntgenstruktur-analyse aufgeklärt und die Verfeinerung wurde nach least squares durchgeführt. Die wichtigsten Struktur-Merkmale betreffen die Sn—Sn-Bindungen in den beiden Komplexen und ein tetranukleares System von Sn-Atomen in der zweiten Verbindung.
    Notes: Two nitratocomplexes of organotin compounds [Sn(NO3){(C6H5)3Sn}] and [Sn(NO3){(C6H5)3Sn}3] have been synthesized and their i.r. spectroscopic properties and X-ray structures have been studied. Crystals of both compounds are monoclinic (space group P21/c with unit cell dimensions: a = 10.42(1), b = 18.91(2), c = 9.09(1) Å, β = 98.3(1)°, Z = 4 for the first compound; space group P21/n with unit cell dimensions: a = 19.153(8), b = 13.957(6), c = 17.914(8) Å, β = 95.8(1)°, Z = 4 for the second compound). The structures have been solved by X-ray analysis and refined by least-squares techniques. The main structural features are the presence of tin-tin bonds in both compounds and of a tetranuclear system of tin atoms in the second one.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19774310128
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