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  • 1
    Electronic Resource
    Electronic Resource
    Solution of torsion crack problem of an orthotropic rectangular bar by using computing compliance method (1997)
    Chichester : Wiley-Blackwell
    Communications in Numerical Methods in Engineering 13 (1997), S. 655-663 
    Details
    ISSN: 1069-8299
    Keywords: stress intensity factors ; computing compliance method ; Engineering ; Numerical Methods and Modeling
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mathematics , Technology
    Notes: For a cracked orthotropic torsion bar, the torsion compliance C is evaluated numerically in this paper. The dependence of the compliance C with respect to the crack length A will give the stress intensity factor at the crack tip. Numerical examples are given to demonstrate the influence of the elastic material constants of orthotropic materials. ©1997 John Wiley & Sons, Ltd.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Microvoltammetric and spectroelectrochemical studies of (TPP)Co oxidation/reduction in toluene and benzene solutions (1989)
    Weinheim : Wiley-Blackwell
    Electroanalysis 1 (1989), S. 113-116 
    Details
    ISSN: 1040-0397
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The microvoltammetry and spectroelectrochemistry of (TPP)Co (where TPP is the dianion of tetraphenylporphyrin) are reported in toluene and benzene solutions, and provide the first examples of spectroelectrochemistry in these two low dielectric constant solvents. (TPP)Co undergoes four reversible oxidation-reduction reactions in toluene or benzene. The reductions involve one-electron transfers and occur at E1/2 = -0.86 and -2.03 V vs. SCE in both solvents. The oxidations involve the successive reversible abstraction of two electrons and one electron from the initial (TPP)Co species and occur at E1/2 = 1.00 and 1.27 V vs. SCE in both solvents. Each electrode reaction was spectrally and electrochemically characterized in toluene and benzene, and the data in these two solvents are compared to data obtained in CH2Cl2 where (TPP)Co redox reaçtions have been extensively characterized in detail. Special emphasis is placed on comparing the thin-layer spectra of [(TPP)Co1] in toluene and benzene with that in other solvents commonly used for nonaqueous electrochemical studies.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/elan.1140010205
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  • 3
    Electronic Resource
    Electronic Resource
    The construction and utilization of a simple light-transparent FTIR spectroelectrochemical cell with thin-layer chamber (1989)
    Weinheim : Wiley-Blackwell
    Electroanalysis 1 (1989), S. 35-41 
    Details
    ISSN: 1040-0397
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The construction and utilization of a simple light-transparent NaCl thin-layer FTIR spectroelectrochemical cell for transparency measurements is reported. This cell has a 0.25-mm optical pathlength and a three-electrode configuration. The application of this cell for in situ FTIR measurements is demonstrated for the electrooxidation of (OEP)lr(CO)Cl, (TPP)Co(NO), and (TPP)Fe(NO) (where OEP and TPP are the dianions of octaethyl- and tetraphenylporphyrin, respectively) in methylene chloride solutions containing 0.1 M tetrabutylammonium perchlorate (TBAP). Under these solution conditions, spectral changes of the investigated compounds can be monitored between 2500 and 800 cm-1. Well-defined thin-layer cyclic voltammograms of these investigated complexes and diagnostic IR absorption peaks for bound CO and NO as well as for porphyrin π cation radicals are obtained in CH2Cl2 solutions containing 0.1 M TBAP. These in situ generated data are compared with literature IR data for chemically oxidized metalloporphyrins in the solid state.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/elan.1140010106
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  • 4
    Electronic Resource
    Electronic Resource
    Rate constants for abstraction of hydrogen from ethylene by methyl and ethyl radicals relative to abstraction from propane and isobutane (1989)
    New York, NY : Wiley-Blackwell
    International Journal of Chemical Kinetics 21 (1989), S. 1-20 
    Details
    ISSN: 0538-8066
    Keywords: Chemistry ; Physical Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: A method is described for the measurement of relative rate constants for abstraction of hydrogen from ethylene at temperatures in the region of 750 K. The method is based on the effect of the addition of small quantities of propane and isobutane on the rates of formation of products in the thermal chain reactions of ethylene. On the assumption that methane and ethane are formed by the following reactions, measurements of the ratio of the rates of formation of methane and ethane in the presence and absence of the additive gave the following results: \documentclass{article}\pagestyle{empty}\begin{document}$$\log (k_7 /k_2) = (- 0.50 \pm 0.4) + (3200 \pm 1000)/2.3T$$\end{document} \documentclass{article}\pagestyle{empty}\begin{document}$$\log (k_8 /k_3) = (- 0.20 \pm 0.4) + (2800 \pm 1000)/2.3T$$\end{document} \documentclass{article}\pagestyle{empty}\begin{document}$$\log (k_{11} /k_2) = (- 0.97 \pm 0.4) + (4600 \pm 1000)/2.3T$$\end{document} \documentclass{article}\pagestyle{empty}\begin{document}$$\log (k_{12} /k_3) = (- 2.0 \pm 0.4) + (6300 \pm 1000)/2.3T$$\end{document} Values for k2 and k3 obtained from these ratios are compared with previous measurements.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/kin.550210102
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