Results 31 to 40 of about 36,700 (277)

Hydrogen-bond switching through a radical pair mechanism in a flavin-binding photoreceptor [PDF]

Proceedings of the National Academy of Sciences, 2006
BLUF (blue light sensing using FAD) domains constitute a recently discovered class of photoreceptor proteins found in bacteria and eukaryotic algae, where they control a range of physiological responses including photosynthesis gene expression, photophobia, and negative phototaxis.
Gauden, M.L., van Stokkum, I.H.M., Key, J.M., Luhrs, D.C., van Grondelle, R., Hegemann, P., Kennis, J.T.M.   +6 more
openaire   +3 more sources

Radical pair model for magnetic field effects on NMDA receptor activity

Scientific Reports
The N-methyl-D-aspartate receptor is a prominent player in brain development and functioning. Perturbations to its functioning through external stimuli like magnetic fields can potentially affect the brain in numerous ways.
Parvathy S. Nair, Hadi Zadeh-Haghighi, Christoph Simon   +2 more
doaj   +2 more sources

Development of electron spin polarization in photosynthetic electron transfer by the radical pair mechanism

Biophysical Journal, 1979
We have extended the radical pair theory to treat systems of membrane-bound radicals with g tensor anisotropy. Analysis of the polarized electron paramagnetic resonance (EPR) signals of P700+, originating from photosystem I of higher plants, in terms of the radical pair mechanism provides information about the sequence of early electron acceptors.
Friesner, R., Dismukes, G.C., Sauer, K.
openaire   +3 more sources

Quantum Sensing and Control of Spin-State Dynamics in the Radical-Pair Mechanism [PDF]

Physical Review Applied, 2021
Radical pairs and the dynamics they undergo are prevalent in many chemical and biological systems. Specifically, it has been proposed that the radical pair mechanism results from a relatively strong hyperfine interaction with its intrinsic nuclear spin environment.
Amit Finkler, Durga Dasari
openaire   +2 more sources

Radical pairs may explain reactive oxygen species-mediated effects of hypomagnetic field on neurogenesis.

PLoS Computational Biology, 2022
Exposures to a hypomagnetic field can affect biological processes. Recently, it has been observed that hypomagnetic field exposure can adversely affect adult hippocampal neurogenesis and hippocampus-dependent cognition in mice.
Rishabh Rishabh, Hadi Zadeh-Haghighi, Dennis Salahub, Christoph Simon   +3 more
doaj   +1 more source

Radical pairs may play a role in microtubule reorganization

Scientific Reports, 2022
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).
Hadi Zadeh-Haghighi, Christoph Simon
doaj   +1 more source

Radical pairs may play a role in xenon-induced general anesthesia

Scientific Reports, 2021
Understanding the mechanisms underlying general anesthesia would be a key step towards understanding consciousness. The process of xenon-induced general anesthesia has been shown to involve electron transfer, and the potency of xenon as a general ...
Jordan Smith, Hadi Zadeh Haghighi, Dennis Salahub, Christoph Simon   +3 more
doaj   +1 more source

Cryptochrome and quantum biology: unraveling the mysteries of plant magnetoreception

Frontiers in Plant Science, 2023
Magnetoreception, the remarkable ability of organisms to perceive and respond to Earth’s magnetic field, has captivated scientists for decades, particularly within the field of quantum biology.
Thawatchai Thoradit, Kanjana Thongyoo, Khwanchai Kamoltheptawin, Lalin Tunprasert, Lalin Tunprasert, Mohamed A. El-Esawi, Blanche Aguida, Nathalie Jourdan, Kittisak Buddhachat, Marootpong Pooam   +9 more
doaj   +1 more source

Chiral-induced spin selectivity in the formation and recombination of radical pairs: cryptochrome magnetoreception and EPR detection

New Journal of Physics, 2021
That the rates and yields of reactions of organic radicals can be spin dependent is well known in the context of the radical pair mechanism (RPM). Less well known, but still well established, is the chiral-induced spin selectivity (CISS) effect in which ...
Jiate Luo, P J Hore
doaj   +1 more source

Rotating Magnetic Fields Inhibit Mitochondrial Respiration, Promote Oxidative Stress and Produce Loss of Mitochondrial Integrity in Cancer Cells

Frontiers in Oncology, 2021
Electromagnetic fields (EMF) raise intracellular levels of reactive oxygen species (ROS) that can be toxic to cancer cells. Because weak magnetic fields influence spin state pairing in redox-active radical electron pairs, we hypothesize that they disrupt
Martyn A. Sharpe, Martyn A. Sharpe, Martyn A. Sharpe, David S. Baskin, David S. Baskin, David S. Baskin, David S. Baskin, Kumar Pichumani, Kumar Pichumani, Kumar Pichumani, Kumar Pichumani, Omkar B. Ijare, Omkar B. Ijare, Omkar B. Ijare, Santosh A. Helekar, Santosh A. Helekar, Santosh A. Helekar, Santosh A. Helekar   +17 more
doaj   +1 more source