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  • 1
    Electronic Resource
    Electronic Resource
    Die Preßdruckprobe als Herzleistungsprüfung (1929)
    Springer
    European journal of applied physiology 1 (1929), S. 614-624 
    Details
    ISSN: 1439-6327
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Zusammenfassung Herzleistungsprüfungen mit Hilfe der Preßdruckproben zeigen, daß das Herz der Sportsleute auf Steigerungen des intrapulmonalen Drucks in charakteristischer Weise reagiert. Die durch laufende Messungen des Blutdrucks und der Steigerung des intrapulmonalen Drucks gewonnene typische Kurve wird als der Ausdruck charakteristischer Anpassung des Kreislaufsystems der Sportsleute an akute Anstrengungen gedeutet. Auch die wechselnde Frequenz des Herzens nach Steigerung des intrapulmonalen Drucks ist für diese Anpassungsfähigkeit des Herzens an akute Anstrengungen charakteristisch. Nach großen Anstrengungen (Marathonlauf) verliert das Herz diese Fähigkeit der schnellen Anpassung an wechselnde Druckverhältnisse im Brustinnenraum.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02008939
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  • 2
    Electronic Resource
    Electronic Resource
    Vibrational spectra and normal coordinate analysis of trifluoromethyl compounds. 37. Molecular structure, vibrational spectra, and normal coordinate analysis of the perfluoromethylamines CF3NF2 and (CF3)2NF (1982)
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 86 (1982), S. 664-670 
    Details
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/j100394a015
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  • 3
    Electronic Resource
    Electronic Resource
    The Hydrate Nature of Soap (1945)
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 49 (1945), S. 417-428 
    Details
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/j150443a002
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  • 4
    Electronic Resource
    Electronic Resource
    Overtone spectrum of stannane: experiment and theoretical analysis (1990)
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 94 (1990), S. 5222-5226 
    Details
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/j100376a009
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  • 5
    Electronic Resource
    Electronic Resource
    The vibrational spectrum and rotational constants of difluoroethyne FC 3/4 CF. Matrix and high resolution infrared studies and ab initio calculations (1991)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 95 (1991), S. 5660-5669 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Infrared spectra of the short-lived difluoroethyne molecule have been recorded in neon and argon matrices between 200 and 5000 cm−1. Fourier transform infrared spectra with a resolution of 0.004 cm−1 have been measured in the gas phase around 1350 cm−1 (ν3, ν2+ν4+ν5, hot bands) and 2150 cm−1 (ν2+ν3, ν1−ν5, hot bands). The high resolution study yields rotational parameters of the ground and all singly excited vibrational states. The interpretation of the experimental data has been guided by ab initio calculations at the SCF (self-consistent-field) level and the correlated MP2 level (Moller–Plesset second order perturbation theory) employing three different large basis sets. The theoretical calculations provide the SCF and MP2 harmonic fields as well as the SCF anharmonic force field of FCCF. The agreement between the available theoretical and experimental results is generally quite good, with the exception of the spectroscopic constants involving the trans-bending mode ν4 where more theoretical work is required. The combined use of theoretical and experimental information leads to an estimate of the equilibrium structure [D∞h, re(CC)=1.1865 A(ring), re(CF)=1.2832 A(ring)] and to recommended "best'' values for the wave numbers of all fundamental vibrations based on the matrix and high resolution infrared data and some ab initio anharmonicity constants. The present study demonstrates the advantages of a combined theoretical and experimental approach to the spectroscopy of short-lived molecules.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.461640
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  • 6
    Electronic Resource
    Electronic Resource
    High-resolution rotation–vibration spectroscopy of difluorophosphorane: A combined theoretical and experimental study (1990)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 93 (1990), S. 4603-4614 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The harmonic and anharmonic force fields of PH3F2 have been calculated at the ab initio self-consistent-field level using polarized split-valence and triple-zeta basis sets. PH3F2 has been prepared in pure form and identified unambiguously in the gas phase by Doppler-limited Fourier transform infrared spectroscopy. Guided by the theoretical predictions for the rotation–vibration spectra and the spectroscopic constants, the observed bands have been assigned and several of them rotationally analyzed, in particular ν4/2ν±27, ν2+ν4/ν2+2ν±27, and ν5/ν3+ν8. PH3F2 is found to have a D3h structure, ro(PH)=1.394(4) A(ring) and ro(PF)=1.6468(2) A(ring). The theoretical results are in good agreement with experiment, both for the structure and for the available spectroscopic constants. The present study demonstrates the advantages of a combined theoretical and experimental approach to the spectroscopy of reactive molecules.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.458700
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  • 7
    Electronic Resource
    Electronic Resource
    Local-mode effects on the rotational structure of the first stretching overtone band system of stibine, SbH3 (1991)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 95 (1991), S. 7099-7107 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: A high-resolution Fourier-transform infrared spectrum, resolution about 0.006 cm−1, of the first stretching overtone band system of stibine has been measured and rotationally analyzed in detail up to J'=22 for both 121SbH3 and 123SbH3 isotopic species. The rotational levels of the A1 and E vibrational states have been analyzed simultaneously by including vibration–rotation coupling terms in the Hamiltonian for the two isotopic species. The A1/E vibrational energy-level separation has been found to be 0.0727(8) cm−1 for 121SbH3 and 0.0763(8) cm−1 for 123SbH3 with the A1 state being higher in energy in both cases. Fits including 1445 transitions with the standard deviation of 0.0024 cm−1 for 121SbH3 and 1322 transitions with the standard deviation of 0.0022 cm−1 for 123SbH3 have been obtained by optimizing altogether 33 upper-state parameters in both cases. A simple local-mode model is shown to account very well for the vibrational dependence of the rotational constants and the coefficients of vibrationally off-diagonal H22 operators.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.461819
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  • 8
    Electronic Resource
    Electronic Resource
    Rotational analysis of the (2000) stretching vibrational band system of 116SnH4 (1990)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 93 (1990), S. 1607-1612 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: A high resolution Fourier transform infrared spectrum, resolution (FWHM) 10.5×10−3 cm−1, of the (2000, A1/F2) stretching vibrational band system of 116SnH4 has been measured and analyzed in detail up to J=20. The rotational levels of the two vibrational states A1 and F2 are treated simultaneously by including vibration–rotation coupling terms in the Hamiltonian. 1290 infrared transitions from the ground vibrational state to the excited (2000) states have been included as data in the least squares optimization of 21 Hamiltonian parameters. The standard deviation of the fit obtained is 1.1×10−3 cm−1. The upper state vibrational energy level separation has been determined to be 0.0908 (5) cm−1 with the A1 state being higher in energy than the F2 state. The effective rovibrational parameters are found to satisfy closely the local mode constraints.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.459088
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  • 9
    Electronic Resource
    Electronic Resource
    On the construction of coarse-grained models for linear flexible polymer chains: Distribution functions for groups of consecutive monomers (1991)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 95 (1991), S. 6014-6025 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Coarse-grained models for linear flexible polymers are constructed defining effective segments by taking together n successive chemical monomers of a polymer chain, for n=1,2,3,... . The distribution function Pn(l) for the length l of such effective segments is studied as well as the distribution function Pn(cursive-theta) of the angle between successive effective segments. If n is large enough, all these distribution functions tend towards universal limiting functions. For small n, information on chemical structure and effective potentials for the various degrees of freedom of the polymer chains is still preserved. Using polyethylene (PE) as one example, it is shown that these distribution functions for small n depend somewhat on the choice of the model for the effective potential (and the degrees of freedom included). Bisphenol-A-polycarbonate (BPA-PC) as a second example, serves to study to which extent these distribution functions Pn(l) and Pn(cursive-theta) differ for chemically different polymers, such as PE and BPA-PC. Consequences for the molecular modeling of polymeric materials are briefly discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.461826
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  • 10
    Electronic Resource
    Electronic Resource
    Micro-pellet injection into tokamak plasma by laser acceleration (1994)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 65 (1994), S. 426-429 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: Different methods are tested for the injection of small (〈100 μm) pellets into tokamak plasmas using laser acceleration. In one type of method the pellets are formed in the random fragmentation process of a foil, while in another series of experiments aluminum granules were accelerated. In the first case pellet velocities up to 4 km/s were achieved, but the reproducibility was found to be poor. In the second case the reproducibility was much better, and pellets with diameters in the ten micron range were accelerated to 200–300 m/s velocity. With some further improvements, this technique may become a simple source of impurities for transport studies in fusion plasmas.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1145150
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