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  • Analytical Chemistry and Spectroscopy  (4)
  • Engineering  (2)
  • COMPOSITE MATERIALS
  • 1970-1974  (6)
  • 1
    Electronic Resource
    Electronic Resource
    Letters to the editor (1973)
    Chichester [u.a.] : Wiley-Blackwell
    International Journal for Numerical Methods in Engineering 6 (1973), S. 454-456 
    Details
    ISSN: 0029-5981
    Keywords: Engineering ; Engineering General
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mathematics , Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/nme.1620060320
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  • 2
    Electronic Resource
    Electronic Resource
    Use of characteristics for boundaries in time dependent finite difference analysis of multidimensional gas dynamics (1972)
    Chichester [u.a.] : Wiley-Blackwell
    International Journal for Numerical Methods in Engineering 5 (1972), S. 91-101 
    Details
    ISSN: 0029-5981
    Keywords: Engineering ; Engineering General
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mathematics , Technology
    Notes: Relations form the theory of characteristics are used to connect boundary and interior points in the numerical analysis of multidimensional, unsteady gas dynamics.Since specification of all variables on the boundaries does not occur, it is necessary to employ at least some of the differential equations for boundary points. The objective is to avoid the use of non-central finite differences and the subsequent generation of a pseudo-boundary layer.Boundaries consisting of a moving shock wave, a solid wall and a surface in a supersonic, downstream region are considered. The numerical procedure for determining variables on boundaries is described in datail for the hypersonic, blunt body problem.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/nme.1620050109
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  • 3
    Electronic Resource
    Electronic Resource
    Mass spectrometric studies - VIII.For Part VII see Q. N. Porter and Christine C. R. Ramsay, Tetrahedron in press. Double hydrogen migration in 1,1-dimethyl-2,2-dibenzoyl hydrazine (1970)
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 4 (1970), S. 361-363 
    Details
    ISSN: 0030-493X
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The m/e 226 peak in the mass spectrum of 1,1-dimethyl-2,2-dibenzoylhydrazine is formed by loss of C2H4N from the molecular ion, a process involving concerted transfer of two hydrogen atoms from the same methyl group as an accompaniment to N—N bond fission.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/oms.1210040138
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  • 4
    Electronic Resource
    Electronic Resource
    Analysis of fine splittings in the fourier transform 1H magnetic resonance spectra of some 15N labeled borazine derivatives (1974)
    Chichester : Wiley-Blackwell
    Organic Magnetic Resonance 6 (1974), S. 456-460 
    Details
    ISSN: 0030-4921
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Proton NMR spectra are reported for 15N enriched borazine and a series of 15N enriched derivatives: N-methyl-borazine, N,N′-dimethylborazine and a new photochemical product, 1-methyl-2-aminoborazine. Chemical shifts for the ring (15N—H) protons have been measured. Using a Fourier transform spectrometer, fine structure in the 15N—H doublet is resolved. Ortho and meta ring proton and three-bond 15N to H coupling constants have been determined. Substituent effects on chemical shifts and coupling constants for borazine derivatives are compared with those for analogous benzene derivatives.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mrc.1270060814
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  • 5
    Electronic Resource
    Electronic Resource
    Mass spectrometric studies-VI:Part V, Australian J. Chem. 22, 405(1969). Aziridines (1970)
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 3 (1970), S. 1259-1282 
    Details
    ISSN: 0030-493X
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The mass spectra of C-alkylaziridines show that generally β-cleavage is the most important fragmentation, although α-cleavages also occur as do γ-, and δ- and ∊-cleavages in appropriate examples. A surprising rearrangement of the β-cleavage ions has been explained as the result of a four-centre cyclization followed by fragmentation. Other decompositions occur via transannular cleavages with and without hydrogen transfer. α-Cleavage appears to be the most important fragmentation of N-alkylaziridines. N-Phenylaziridine shows very marked 1,2-phenyl-migration before fragmentation.
    Additional Material: 13 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/oms.1210031006
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  • 6
    Electronic Resource
    Electronic Resource
    High intensity excitation sources for X-ray energy spectroscopy (1973)
    New York, NY [u.a.] : Wiley-Blackwell
    X-Ray Spectrometry 2 (1973), S. 85-89 
    Details
    ISSN: 0049-8246
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Physics
    Notes: The use of secondary targets with commercially available high power X-ray spectroscopy tubes has been investigated as a means of providing an excitation source for X-ray energy spectroscopy. A comparison has been made between the secondary target mode of excitation and the use of the tube directly. Results from this comparison show the superiority of the secondary target technique. Examples of analysis using the secondary target excitation are given to illustrate the high data rates and low background this technique has to offer.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/xrs.1300020208
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