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  • 1
    Electronic Resource
    Electronic Resource
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 113 (2000), S. 11159-11175 
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: In this work we apply a generalized Zusman model to study the influence of an external periodic electric field on the dynamics of electron transfer (ET) reactions coupled to an overdamped reaction coordinate which is treated semiclassically. Being nonperturbative in the tunneling coupling this approach goes beyond the conventional Golden Rule description and includes both adiabatic and nonadiabatic electron transfer regimes. Explicit expressions for the ET rates are derived in the high-frequency driving regime and compared with exact numerical results. Our novel analytical findings constitute a useful approximation scheme, as long as the dynamics can be characterized by a single exponential relaxation. We further demonstrate that the Golden Rule description becomes drastically improved in the presence of strong, fast oscillating fields. Moreover, we discuss interesting phenomena such as an inversion of populations and a driving induced transition from an adiabatic to a nonadiabatic reaction dynamics. © 2000 American Institute of Physics.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 115 (2001), S. 3969-3969 
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 109 (1998), S. 2635-2643 
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The tunneling dynamics of a dissipative two-level system that is strongly driven by elliptically polarized electric fields is investigated. The dissipative dynamics is governed within the noninteracting-blip-approximation for the stochastic forces by a generalized master equation (GME). With the focus being on viscous friction, we compare exact numerical solutions of the GME with analytical approximations to both the transient and the asymptotic, long-time periodic dynamics. Novel phenomena are identified: These are a selective control on localization (or, as well, on delocalization) of the tunneling dynamics, or the inversion of an initially induced localization by a static bias via multiphoton-assisted tunneling. These effects can be selectively tuned as a function of the eccentricity parameter p=Ey/Ex of corresponding field amplitudes. In particular, the case of a circularly polarized driving field with p=±1 yields a dramatic enhancement of the relaxation rate at resonances, when an integer multiple of the angular driving frequency matches the asymmetry energy induced by a static bias. © 1998 American Institute of Physics.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    The @journal of organic chemistry 26 (1961), S. 1588-1596 
    ISSN: 1520-6904
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Bulletin of environmental contamination and toxicology 1 (1967), S. 219-224 
    ISSN: 1432-0800
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Medicine
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Psychological research 3 (1923), S. 319-396 
    ISSN: 1430-2772
    Source: Springer Online Journal Archives 1860-2000
    Topics: Psychology
    Notes: Zusammenfassung 1. Verschmelzung zweier Reize ist das phänomenale Korrelat der Koppelung zweier dynamischer Geschehensabläufe, die das Ganze des optischen Sektors betreffen. 2. Die Verschmelzungsschwelle hängt ab a) von der Intensität nach einem Exponentialgesetz, b) den zeitlichen Verhältnissen der Reize in quantitativ bestimmter Weise, und c) von der Expositionsform. 3. Sie hängt ferner ab von der Breite (allgemein der Größe) und der peripheren Erstreckung der Reizfigur. 4. Sie wird beeinflußt durch Ermüdung und Dunkeladaptation. 5. Sie erweist sich in meßbarem Betrage als bedingt durch Eigenschaften der den Reizfiguren entsprechenden phänomenalen Gestalten, bzw. ihrer physiologischen Korrelate. 6. β-Bewegung, γ-Bewegung und die Vorstadien der Verschmelzung (sowie diese selbst) lassen eine gemeinsame Erklärungsgrundlage zu.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 5 (1963), S. 331-345 
    ISSN: 0006-3592
    Keywords: Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: These experiments show that ABS can be adsorbed and desorbed from microbial cell surfaces. The adsorption equilibria between the free and adsorbed phases are primarily influenced by the pH of the system. The effects of ABS upon the biochemical activities of bacteria depended upon the amount of ABS adsorbed and the type of bacteria present. The behaviour of ABS is essentially the same whether in the presence of pure or mixed bacterial cultures. Two desorption experiments with soil from a reclaimed water spreading basin which has received sewage over a six month period showed that at least 82% of the ABS “loss” was recoverable from the soil. In all the experiments carried out in this study no evidence was obtained for the biochemical degradation of ABS.
    Additional Material: 15 Ill.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 587 (1954), S. 207-212 
    ISSN: 0075-4617
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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