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  • 1
    Electronic Resource
    Electronic Resource
    The ethylene–carbon dioxide complex: A double internal rotor (1995)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 103 (1995), S. 7788-7795 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: A rotationally resolved near-infrared spectrum has been obtained for the ethylene–CO2 van der Waals complex. The structure obtained for this complex has the carbon dioxide lying above the plane of the ethylene molecule, with the CO2 axis parallel to this plane. The individual subbands observed in the spectrum are shifted from the expected rigid rotor positions, indicative of internal rotation of the two monomer units within the complex. A double rotor model is presented that accounts for the shifts and provides an estimate of the barrier to internal rotation. The results indicate that the complex is completely delocalized along the internal rotational coordinate. Ab initio calculations are also presented that are in good agreement with this picture. © 1995 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.470194
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  • 2
    Electronic Resource
    Electronic Resource
    The Ar–C2H2 intermolecular potential from high resolution spectroscopy and ab initio theory: A case for multicenter interactions (1993)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 99 (1993), S. 8585-8598 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Infrared spectra have been obtained for the Ar–C2H2 complex, which include a combination band associated with the low frequency bending mode. These data are used, together with ab initio calculations and the results of previous studies of this system, to construct a two-dimensional Hartree–Fock plus damped dispersion (HFD) intermolecular potential surface corresponding to the C–H stretch excited vibrational state. A high quality SCF surface, which includes ghost orbital corrections, has been used to fix the repulsive part of the potential. The remaining potential parameters were initially estimated with the aid of various combining rules and the collocation technique was used to solve the bound state problem for this potential and to calculate the spectrum of the Ar–C2H2 complex. To obtain good agreement between the calculated and experimental spectra it was necessary to distribute the dispersion interaction over the length of the acetylene subunit. The result is a double minimum potential upon which the complex executes wide amplitude bending motion.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.465582
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  • 3
    Electronic Resource
    Electronic Resource
    The structure of Ar–C2H4 from high resolution infrared spectroscopy and ab initio theory: The twofold barrier to C2H4 internal rotation (1993)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 98 (1993), S. 3754-3762 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The optothermal detection method has been used to obtain high resolution infrared spectra for both the ν9 and ν11 vibrational bands of Ar-ethylene. Analysis of these spectra reveals that the argon atom lies essentially in the plane of the ethylene, situated next to the carbon–carbon double bond. Although the rigid structure that best fits the measured rotational constants actually places the argon atom 15° out of the ethylene plane, the experimental and theoretical results are more consistent with a planar equilibrium geometry and wide amplitude in-plane and out-of-plane motion of the ethylene sub-unit. In both spectra the transitions appear as doublets, due to the fact that the ethylene sub-unit undergoes internal rotation between equivalent frameworks. Of the possible paths, only internal rotation about the C=C axis is consistent with the data. The barrier to internal rotation is estimated from the tunneling splitting to be 76 cm−1, which is compared with the results of ab initio calculations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.464054
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  • 4
    Electronic Resource
    Electronic Resource
    Erratum: Wide amplitude motion in the water–carbon dioxide and water–acetylene complexes [J. Chem. Phys. 96, 7321 (1992)] (1993)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 98 (1993), S. 10107-10107 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.465122
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  • 5
    Electronic Resource
    Electronic Resource
    Wide amplitude motion in the water–carbon dioxide and water–acetylene complexes (1992)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 96 (1992), S. 7321-7332 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The optothermal detection method has been used to obtain near-infrared spectra of the H2O–CO2 and H2O –HCCH van der Waals molecules in the 3 μm region. For H2O–CO2, the observed vibrational band correlates with the asymmetric O–H stretching vibration of the water monomer and gives a direct measurement of the internal rotation tunneling splitting, from which the height of the associated barrier is estimated. This experimental estimate is compared with results obtained from both a distributed multipole analysis and an ab initio calculation. In the case of H2O –HCCH, three different vibrational bands are observed. Although these spectra are not directly sensitive to the wide amplitude motion in this molecule, they are consistent with the quasiplanar picture suggested by the ab initio calculations. These calculations show the molecule to have a bent equilibrium structure, with a small barrier located at the planar geometry.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.462435
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  • 6
    Electronic Resource
    Electronic Resource
    Spectroscopic evidence for near-resonant intermolecular energy transfer in the vibrational predissociation of acetylene-HX and acetylene-DX (X = Cl, Br and I) complexes (1991)
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 95 (1991), S. 2881-2888 
    Details
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/j100160a044
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  • 7
    Electronic Resource
    Electronic Resource
    Structure of the ethylene dimer from rotationally resolved near-infrared spectroscopy: A quadruple hydrogen bond (1995)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 102 (1995), S. 3993-3999 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Reported here are the first rotationally assigned near-infrared spectra of the ethylene dimer. The vibrational bands observed in this study correlate with ν9 and ν11 of the ethylene monomer, corresponding to C–H stretching motion. The spectral patterns have been identified as due to the vibrational transitions of a symmetric top molecule with D2d symmetry. This structure of the dimer has been predicted by ab initio calculations as the most stable geometry due to the fact that it enables the formation of four equivalent hydrogen bonds. Both vibrational bands show considerable homogeneous broadening corresponding to vibrational predissociation lifetimes of 0.37 and 0.18 ns for ν9 and ν11 excitation, respectively. © 1995 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.468527
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  • 8
    Electronic Resource
    Electronic Resource
    Autoradiographic studies of the initial cellular response to injury
    Amsterdam : Elsevier
    Experimental Cell Research 30 (1963), S. 311-321 
    Details
    ISSN: 0014-4827
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/0014-4827(63)90302-1
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  • 9
    Electronic Resource
    Electronic Resource
    Specificity of symptoms in RDC endogenous depression
    Amsterdam : Elsevier
    Journal of Affective Disorders 16 (1989), S. 243-248 
    Details
    ISSN: 0165-0327
    Keywords: Endogenous depression ; Research Diagnostic Criteria
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Medicine , Psychology
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0165-0327(89)90079-7
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  • 10
    Electronic Resource
    Electronic Resource
    Patient compliance and therapeutic coverage: comparison of amlodipine and slow release nifedipine in the treatment of hypertension (1995)
    Springer
    European journal of clinical pharmacology 47 (1995), S. 477-481 
    Details
    ISSN: 1432-1041
    Keywords: Amlodipine ; Nifedipine ; Compliance ; slow release formulation ; hypertension ; therapeutic coverage
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Abstract To study patient compliance in hypertensive outpatients amlodipine (5 mg once daily) and slow release nifedipine (20 mg twice daily) were compared in an open, crossover study in general practices. Four methods of assessment for patient compliance (pill count, taking compliance, days with correct dosing, timing compliance) were used in both study arms. For the latter three assessment a special device, the medication event monitoring system, was used to record the time and date of each opening and closure of the container. The compliance of the 320 hypertensive patients with once-daily amlodipine was markedly superior to twice-daily slow release nifedipine. Therapeutic coverage was also significantly better for amlodipine in the hypertensive patients. Amlodipine was better tolerated than nifedipine slow release. Patient compliance and therapeutic coverage with the calcium antagonist amlodipine given once daily was superior to slow release nifedipine b. d. in hypertensive outpatients recruited in general practice. Statistical Unit: Léon Kaufmann, Marie-Paule Derde, Data Investigation Company Europe, Brussels Participating Investigators: D. Abbate, G. Armand, C.I. Authelet, J.L. Badot, J. Baeck, P. Baeck, P. Bastin, C.I. Bernard, P. Bernard, B. Beyssens, J. Bosly, P. Boudart, J. Bourdeaudhuy, W. Callens, L. Carolides, Y. Catry, E. Cerstelotte, F. Charlier, H. Charloteaux, J.M. Chaudron, L. Christiaen, G. Cornette, P. Cranskens, R. Creteur, N. De Cock, M. De Corte, A. De Vos, P. Defrance, P. Delhaye, G. Deneckere, M. Dobbeleir, A. Dufour, P. Dumont, L. D'Haen, H. D'Haenens, P. Eloy, P. Evrard, C. Fellemans, G. Geeraerts, L. Gielen, D. Grand, J. Grosjean, J. Guffens, R. Guillaume, R. Hacquaert, V. Hamoir, W. Hens, M. Hondeghem, M.C. Humblet-Koch, L. Leven, W. Janssens, L. Jeanfils, J. Jodogne, B. Jortay, W. Ketels, J.M. Krzesinski, E. Langendries, J. Lannoy, M. Leeman, J. Leire, P. Lempereur, L. Lenaerts, F. Lustman, R. Martens, Y. Maus, M. Meroueh, J.P. Meurant, P. Meurant, A. Michiels, E. Mievis, H. Moors, K. Naesens, P. Neels, J. Neven, W. Odeurs, W. Pardon, M. Peduzzi, J. Piette, D. Plessers, P. Putzeys, A. Quoidbach, A. Renaerts, G. Rits, M. Ruhwiedel, M. Salavracos, M. Seret, P. Sibille, M. Taziaux, J. Teucq, H. Therasse, F. Tihon, F. Vandenput, J. Van Elsen, J.P. Van Liefferinge, J. Van Neck, M. Van Pelt, T. Van Vlaenderen, G. Vandenbeylaardt, M. Vandewoude, F. Veldeman, D. Ven, F. Verbruggen, A. Vlaeminck, P. Werion, J. Westerlinck.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00193697
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