Magnetic field dependent yield of geminate radical pair recombination in micelles

Pedersen, J. Boiden; Shushin, A. I.; Jørgensen, Jørgen S.

doi:10.1016/0301-0104(94)00328-9

Cited by 29 publications

(31 citation statements)

References 18 publications

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“…The approach that radicals undergo a diffusive relative motion in a short potential well can be described by the stochastic Liouville equation (SLE), in other words, we take into account for effects of attraction (or repulsion) between the radicals a and b, which includes the combined spin-space evolution of the RP out and inside of an mathematical device called micelles [7,8]. The main effect of a micelle is to confine the RP to a finite volume (cage effect, Figure 3a), approximately in spherical shape, where are kept at small and fixed relative distance for a long time due to a strong interradical interaction for their study.…”

Section: Hyperfine Interactionmentioning

confidence: 99%

Possible action mechanism of the electromagnetic fields in the liver cancer development: A mathematical proposal

Jiménez-García¹,

Godina-Nava²

2012

AIP Conference Proceedings

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A possible mathematics for the unification of quantum mechanics and general relativity Abstract. Currently it is known that electromagnetic field exposure can induce biological changes, although the precise effects and action mechanism of the interaction between the electromagnetic field and biological systems are not well understood. In this work we propose a possible action mechanism, concerning the effect that the extremely low frequency electromagnetic field exposure has on the early stage of liver cancer development. The model is developed studying the phenomena called oxidative stress that it appears after it is applied a carcinogenic agent used to induce hepatic cancer chemically in an experimental animal model. This physical-chemical process involves the movement of magnetic field dependent free charged particles, called free radicals. We will consider the use of the radical pairs theory as a framework, in which we will describe the spin density operator evolution by implementing the stochastic Liouville equation with hyperfine interaction. This describes how the selectivity of the interaction between spin states of the free radicals with the applied electromagnetic field, influences the development of pre-neoplastic lesions in the liver.

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Section: Hyperfine Interactionmentioning

confidence: 99%

Possible action mechanism of the electromagnetic fields in the liver cancer development: A mathematical proposal

Jiménez-García¹,

Godina-Nava²

2012

AIP Conference Proceedings

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“…We will follow the standard approach [1,[21][22][23], and take as a starting point the well-known Liouville equation P = -i[M,P] -Z s (Psp +PPs) -kP (3) where p is the spin density matrix, cW is spin Hamiltonian of the complex. The second term in Eq.…”

Section: Modelmentioning

confidence: 99%

“…The validity of the approach was discussed in [23]. Due to weak dependence of the reaction yield Y on Jo and Js we can set them to zero (JS = Jo = 0).…”

Section: Kinetic Approximationmentioning

confidence: 99%

A Model of spin catalysis in bacterial photosynthetic reaction centres

1999

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A model of influence of non-heme Fe 21 ion on kinetics of electron transfer between quinone anion-radicals Qp and QB in bacterial reaction centres is proposed and investigated. Physical mechanism of the influence is associated with singlet-triplet transitions in QAQB pair caused by interactions with paramagnetic Fe z . The model incorporates exchange couplings between the particles and zero-field splittings in high-spin Fe 2 '. These interactions are shown to catalyze electron transfer in triplet pairs and alter the reaction yield significantly.

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“…The Johnson-Merrifield approximation (JMA) [5,6] reduces the problem by excluding all off-diagonal elements of the spin density matrix in the basis that diagonalizes the free Hamiltonian. Consequently it cannot describe coherent effects, such as the usual singlet triplet (Q) mixing and its applicability appears to be restricted to systems with exponential time dependences, such as micelles, and to incoherent mixing of states (relaxation).…”

Section: Introductionmentioning

confidence: 99%

Recombination yield of geminate radical pairs in low magnetic fields – A Green’s function method

2006

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Magnetic field dependent yield of geminate radical pair recombination in micelles

Cited by 29 publications

References 18 publications

Possible action mechanism of the electromagnetic fields in the liver cancer development: A mathematical proposal

Possible action mechanism of the electromagnetic fields in the liver cancer development: A mathematical proposal

A Model of spin catalysis in bacterial photosynthetic reaction centres

Recombination yield of geminate radical pairs in low magnetic fields – A Green’s function method

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