Magnetic Field Effects in Radical Pairs and Exciplexes Resulting From Spin-Dynamics Caused by Hyperfine Interaction, g-factor Variations as Well as Ferromagnetic Fringe Fields

2018 ◽  
pp. 91-142
Author(s):  
Markus Wohlgenannt
Keyword(s):  
Magnetic Field ◽  
Hyperfine Interaction ◽  
Spin Dynamics ◽  
Magnetic Field Effects ◽  
Radical Pairs ◽  
G Factor ◽  
Field Effects ◽  
Fringe Fields

scholarly journals Radical pairs may play a role in microtubule reorganization

2021 ◽  
Author(s):  
Hadi ZADEH-HAGHIGHI ◽  
Christoph Simon
Keyword(s):  
Magnetic Field ◽  
Radical Pair ◽  
Spin Dynamics ◽  
Radical Pair Mechanism ◽  
Magnetic Field Effects ◽  
Radical Pairs ◽  
Quantum Theories ◽  
Mechanism Model ◽  
Field Effects ◽  
Isotopic Dependence

The exact mechanism behind general anesthesia remains an open question in neuroscience. It has been proposed that anesthetics selectively prevent consciousness and memory via acting on microtubules (MTs). It is known that the magnetic field modulates MT organization. A recent study shows that a radical pair model can explain the isotope effect in xenon-induced anesthesia and predicts magnetic field effects on anesthetic potency. Further, reactive oxygen species are also implicated in MT stability and anesthesia. Based on a simple radical pair mechanism model and a simple mathematical model of MT organization, we show that magnetic fields can modulate spin dynamics of naturally occurring radical pairs in MT. We show that the spin dynamics influence a rate in the reaction cycle, which translates into a change in the MT density. We can reproduce magnetic field effects on the MT concentration that have been observed. Our model also predicts additional effects at slightly higher fields. Our model further predicts that the effect of zinc on the MT density exhibits isotopic dependence. The findings of this work make a connection between microtubule-based and radical pair-based quantum theories of consciousness.

Magnetic Field Effects and Spin Dynamics of Radical Reactions in Solution

2001 ◽  
Vol 74 (5) ◽  
pp. 773-783 ◽  
Author(s):  
Hisaharu Hayashi ◽  
Yoshio Sakaguchi ◽  
Masanobu Wakasa
Keyword(s):  
Magnetic Field ◽  
Spin Dynamics ◽  
Radical Reactions ◽  
Magnetic Field Effects ◽  
Field Effects

Time-resolved studies of radical pairs

2009 ◽  
Vol 37 (2) ◽  
pp. 358-362 ◽  
Author(s):  
Jonathan R. Woodward ◽  
Timothy J. Foster ◽  
Alex R. Jones ◽  
Adrian T. Salaoru ◽  
Nigel S. Scrutton
Keyword(s):  
Magnetic Field ◽  
Magnetic Fields ◽  
Chemical Reactions ◽  
Radical Pair ◽  
Radical Pair Mechanism ◽  
Magnetic Field Effects ◽  
Radical Pairs ◽  
Time Resolved ◽  
Field Effects ◽  
Field Sensitivity

The effect of magnetic fields on chemical reactions through the RP (radical pair) mechanism is well established, but there are few examples, in the literature, of biological reactions that proceed through RP intermediates and show magnetic field-sensitivity. The present and future relevance of magnetic field effects in biological reactions is discussed.

A practical approach to calculate the time evolutions of magnetic field effects on photochemical reactions in nano-structured materials

2015 ◽  
Vol 17 (15) ◽  
pp. 9737-9747 ◽  
Author(s):  
Tomoaki Yago ◽  
Masanobu Wakasa
Keyword(s):  
Magnetic Field ◽  
Spin Polarization ◽  
Practical Method ◽  
Photochemical Reactions ◽  
Magnetic Field Effects ◽  
Radical Pairs ◽  
Structured Materials ◽  
Field Effects ◽  
Chemically Induced ◽  
Dynamic Spin

A practical method to calculate time evolutions of magnetic field effects (MFEs) on photochemical reactions involving radical pairs is developed on the basis of the theory of the chemically induced dynamic spin polarization proposed by Pedersen and Freed.

Magnetic Field Effects on the Recombination Kinetics of Radical Pairs

1998 ◽  
Vol 102 (2) ◽  
pp. 464-472 ◽  
Author(s):  
B. van Dijk ◽  
J. K. H. Carpenter ◽  
A. J. Hoff ◽  
P. J. Hore
Keyword(s):  
Magnetic Field ◽  
Magnetic Field Effects ◽  
Radical Pairs ◽  
Field Effects ◽  
Kinetics Of ◽  
Recombination Kinetics
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