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  • 1990-1994  (10)
  • 1
    Electronic Resource
    Electronic Resource
    High-accuracy measurement of vibrational Raman bands of ozone at 266 and 270 nm excitations (1994)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 101 (1994), S. 1914-1922 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Resonance Raman spectra of ozone at two excitation wavelengths (266 and 270 nm) have been measured up to 11 000 cm−1. Band origins have been measured to high accuracy and determined to within a few cm−1. Several bands beyond the dissociation limit have been observed. All prominent bands observed in this work fit to a two-oscillator Darling–Dennison model. An analytical two-dimensional potential energy surface has been constructed based on the new experimental data.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.467701
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Unraveling of transition dipole and dynamical contributions to resonance Raman intensities (1993)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 99 (1993), S. 7267-7270 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The short-time behavior of resonance Raman correlation functions and the shape of the nuclear potential for the ground electronic state is shown to determine the shapes of both the excited state potential and the transition dipole moment. This is demonstrated for models involving large-amplitude vibrational motion.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.465420
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Spectroscopy and dynamics of resonance Raman scattering by iodobenzene excited in the B continuum (1992)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 96 (1992), S. 67-76 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Resonance Raman scattering in iodobenzene is studied for excitation in the region 219–233 nm (B 1A1←X 1A1). There is a rich Raman spectrum containing strong fundamentals of ring-based modes and the CI stretch. On resonance, overtones and combination bands of most modes are strongly enhanced. The modulation of the CI stretch activity as a function of wavelength is interpreted in terms of the initial dynamical evolution of the molecule in the excited state. A normal mode analysis is also made of the ground-state planar modes of iodobenzene in order to correlate the observations with the resonance Raman spectra in benzene.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.462452
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Photoexcitation spectra of transition region species in reactions of potassium with sodium halides (1992)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 96 (1992), S. 3559-3568 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Emission at 589.0 nm from Na atoms is observed when beams of K and NaX (X=Cl, Br, I) are crossed inside the cavity of a cw dye laser tuned to wavelengths not resonant with either the isolated reagents or products. This emission is interpreted as the signature of light absorption by a system in the process of chemical reaction, and the variation of this emission intensity with probe wavelengths is an excitation spectrum of "transition region species'' formed in these reactions. Each spectrum displays a "blue'' feature where the emission intensity increases sharply as the probe wavelength approaches the Na D lines. A second "red'' feature is also observed in all of the spectra. This feature appears as a well resolved maximum for the Br and I systems peaked at ∼610 nm, and is much broader for the Cl system with the maximum at ∼640 nm. Definitive assignment of these features is not yet possible, but several possible mechanisms are proposed which may give insight into the reaction dynamics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.461910
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Numerical solution of angular wave equations (1990)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 92 (1990), S. 574-584 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: A new adaptation of the Numerov–Cooley integration method is made for equations with both first and second derivatives, as commonly encountered in quantum mechanical problems involving angles. The associated second-order eigenvalue correction formula is also generalized. The new methods are demonstrated for the Legendre and Jacobi equations, large-amplitude polyatomic bending, and rotation of an asymmetric top (the Lamé equation).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.458568
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    Continuously scanned resonant Raman excitation profiles for iodobenzene excited in the B continuum (1993)
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 97 (1993), S. 2228-2235 
    Details
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/j100112a025
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    Paper (German National Licenses)
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  • 7
    Electronic Resource
    Electronic Resource
    Rational approximants as analytic polyatomic potential surfaces (1992)
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 96 (1992), S. 7619-7624 
    Details
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/j100198a024
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    Paper (German National Licenses)
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  • 8
    Electronic Resource
    Electronic Resource
    Elevated temperature alters the ionic dependence of amine-induced pacemaker activity in a conditional burster neuron (1992)
    Springer
    Journal of comparative physiology 170 (1992), S. 201-209 
    Details
    ISSN: 1432-1351
    Keywords: Conditional burster ; Temperature ; Stomatogastric ganglion ; Lobster ; Pyloric motor circuit ; Amines
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The anterior burster neuron of the lobster (Panulirus interruptus) stomatogastric ganglion is a conditional burster that functions as the primary pacemaker for the pyloric motor network. When modulatory inputs to this cell are blocked, it loses its bursting properties and becomes quiescent. Applications of the monoamines, dopamine, octopamine or serotonin restore rhythmic bursting in this cell (Flamm and Harris-Warrick 1986). At 15 °C, serotonin- and octopamine-induced oscillations depend critically upon sodium entry (blocked by low sodium saline or tetrodotoxin); dopamine-induced oscillations depend upon calcium entry (blocked by reduced extracellular calcium; Harris-Warrick and Flamm 1987). We show here that the ionic dependence of amine-induced oscillations in the anterior burster cell differs at 15 and 21 °C. At 21 °C, all amines have the potential to induce rhythmic oscillations in saline containing tetrodotoxin. At the elevated temperature and in tetrodotoxin, both calcium and sodium currents are essential for the maintenance of dopamine-induced oscillaions; serotonin-induced oscillations do not depend upon either calcium or sodium alone; octopamine-induced oscillations do not depend upon calcium and show a variable dependence upon sodium. Thus, multiple ionic mechanisms, which vary with both the modulator and the ambient temperature, can be recruited to support rhythmic activity in a conditional burster neuron.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00196902
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  • 9
    Electronic Resource
    Electronic Resource
    A simple adsorption/dilution model for rice herbicides (1991)
    Springer
    Bulletin of environmental contamination and toxicology 47 (1991), S. 244-250 
    Details
    ISSN: 1432-0800
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01688647
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    Paper (German National Licenses)
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  • 10
    Electronic Resource
    Electronic Resource
    Use of cluster and principal component analyses to profile areas in California where ground water has been contaminated by pesticides (1994)
    Springer
    Environmental monitoring and assessment 32 (1994), S. 269-288 
    Details
    ISSN: 1573-2959
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract An empirical approach to profiling areas of ground water contamination by pesticides was devised that did not rely upon determining the level of vulnerability between land areas and that did not assume any particular pathway for ground water contamination. Climatic and soil data were obtained for 1-square mile sections of land in California where pesticide residues had been found in well water samples and the detection was attributed to legal agricultural applications. These sections were designated as known contaminated (KC) sections. Climate and soil data were also obtained for sections which lacked either well sampling data or a positive pesticide detection. These sections were designated as candidate sections. Statistical procedures were used to cluster groups of KC sections first with respect to climate characteristics and then with respect to soil characteristics. Principal components analysis (PCA) was used to construct a statistical profile of soil variables for each cluster of KC sections. A method based on the PCA was developed to compare the similarity of soil profiles derived for each KC section cluster to individual candidate sections. Since the profiling scheme was based only on data from KC sections, candidate sections that did not match any KC cluster profile could only be considered dissimilar to contaminated sections, receiving a status of not-classified. This profiling method is flexible and it can be revised to incorporate updated well sampling information.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00546281
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    Paper (German National Licenses)
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