Results 201 to 210 of about 766,114 (261)
The reference-probe model for a robust and optimal radical-pair-based magnetic compass sensor
The Journal of Chemical Physics, 2020 Radical-pair reactions have been suggested to be sensitive to the direction of weak magnetic fields, thereby providing a mechanism for the magnetic compass in animals. Discovering the general principles that make radical pairs particularly sensitive to the direction of weak magnetic fields will be essential for designing bioinspired compass sensors and
Procopio, Maria, Ritz, Thorsten
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Effect of radio frequency fields on the radical pair magnetoreception model
Physical Review E, 2014Although the radical pair (RP) model is widely accepted for birds' orientation, the physical mechanism of it is still not fully understood. In this paper we consider the RP model in the total angular-momentum representation and clearly show a detailed mechanism for orientation.
Bao-Ming, Xu +4 more
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The Journal of Physical Chemistry C, 2016
Magnetic field effects (MFEs) on triplet pairs generated by singlet fission (SF) in an organic crystal, 1,6-diphenyl-1,3,5-hexatriene, were studied by steady-state fluorescence measurements under ultrahigh magnetic fields of up to 10 T and by time-resolved fluorescence measurements with subnanosecond time resolution in the presence of magnetic field of
Tomoaki Yago +3 more
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Magnetic field effects (MFEs) on triplet pairs generated by singlet fission (SF) in an organic crystal, 1,6-diphenyl-1,3,5-hexatriene, were studied by steady-state fluorescence measurements under ultrahigh magnetic fields of up to 10 T and by time-resolved fluorescence measurements with subnanosecond time resolution in the presence of magnetic field of
Tomoaki Yago +3 more
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Watson–Crick Base Pair Radical Cation as a Model for Oxidative Damage in DNA
The Journal of Physical Chemistry Letters, 2017The deleterious cellular effects of ionizing radiation are well-known, but the mechanisms causing DNA damage are poorly understood. The accepted molecular events involve initial oxidation and deprotonation at guanine sites, triggering hydrogen atom abstraction reactions from the sugar moieties, causing DNA strand breaks.
Linda Feketeová +6 more
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High-Field Supercage Model for Radical Pair Reactions in Micelles
The Journal of Physical Chemistry A, 1997An analytic expression for the escape yield of a radical pair (RP) in a micelle under high magnetic fields is derived by the supercage model. This model is a two time scale model which divides the time evolution into two consecutive stages. The short time stage describes the initial separation of the partners of the RP, and the magnetic field ...
J. Boiden Pedersen +1 more
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Green’s function calculation of radical pair recombination: I. Gyroscopic model formalism
Chemical Physics, 2006Abstract A general gyroscopic model description of radical pair recombination in high magnetic fields is formulated. Recombination is allowed to occur simultaneously from the singlet and triplet states. The description is valid for any diffusion model, symmetry of the system, and exchange interaction, as well as for any rate of recombination ...
A.B. Doktorov, J. Boiden Pedersen
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The diffusion model of radical pair recombination in micellae in high magnetic fields
Chemical Physics, 1985Abstract The radical pair (RP) recombination probability inside micellae is calculated for high magnetic fields when the ST 0 approximation holds. The recombination probability is analyzed as a function of intramicellar viscosity, size and surface properties of micellae. The results obtained are compared with a theory of homogeneous solutions.
K. Luders, K.M. Salikhov
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Photochemistry and Photobiology, 1994
Abstract: A model for magnetic field effects in biological systems is proposed. This model employs the basic concepts of the radical pair mechanism, and predicts that magnetic fields will increase the average radical concentration, lengthen their lifetime and enhance the probability of radical reactions with cellular components. The relevance of these
J C, Scaiano, F L, Cozens, J, McLean
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Abstract: A model for magnetic field effects in biological systems is proposed. This model employs the basic concepts of the radical pair mechanism, and predicts that magnetic fields will increase the average radical concentration, lengthen their lifetime and enhance the probability of radical reactions with cellular components. The relevance of these
J C, Scaiano, F L, Cozens, J, McLean
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Photochemistry and Photobiology, 1995
Abstract— The effect of an alternating current (AC) magnetic field (MF) on radical behavior is identical to that exerted by a direct current (DC) field of the same instantaneous strength provided that the frequency is low enough in comparison with radical pair dynamics. This criterion is easily met by environmental fields.
J C, Scaiano, F L, Cozens, N, Mohtat
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Abstract— The effect of an alternating current (AC) magnetic field (MF) on radical behavior is identical to that exerted by a direct current (DC) field of the same instantaneous strength provided that the frequency is low enough in comparison with radical pair dynamics. This criterion is easily met by environmental fields.
J C, Scaiano, F L, Cozens, N, Mohtat
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Journal of the American Chemical Society, 1995
Supramolecular systems synthesized to model the photosynthetic reaction center (RC) are designed to mimic several key properties of the RC protein. Thus far, most RC models fulfill only a subset of these criteria, with very few reports employing time-resolved electron paramagnetic resonance spectroscopy (TREPR).
Kobi Hasharoni +5 more
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Supramolecular systems synthesized to model the photosynthetic reaction center (RC) are designed to mimic several key properties of the RC protein. Thus far, most RC models fulfill only a subset of these criteria, with very few reports employing time-resolved electron paramagnetic resonance spectroscopy (TREPR).
Kobi Hasharoni +5 more
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