Results 31 to 40 of about 207,666 (291)

COCKROACHES USE RADICAL PAIR MECHANISM TO DETECT MAGNETISM [PDF]

open access: yesJournal of Experimental Biology, 2009
![Figure][1] Restricted to our own suite of five senses, it is sometimes hard to imagine what the world is like for creatures that detect phenomena beyond our own capabilities. How many birds and insects negotiate the world by sensing the magnetic field that bathes our planet is a ...
openaire   +1 more source

Avian magnetoreception model realized by coupling a magnetite-based mechanism with a radical-pair-based mechanism [PDF]

open access: yesChinese Physics B, 2013
Many animal species were verified to use geomagnetic field for their navigation, but the biophysical mechanism of magnetoreception has remained enigmatic. This paper presents a special biophysical model that consists of magnetite-based and radical-pair-based mechanisms for avian magnetoreception. The amplitude of the resultant magnetic field around the
Lu, Yan, Song, Tao
openaire   +2 more sources

Direct Interaction of Avian Cryptochrome 4 with a Cone Specific G-Protein

open access: yesCells, 2022
Background: Night-migratory birds sense the Earth’s magnetic field by an unknown molecular mechanism. Theoretical and experimental evidence support the hypothesis that the light-induced formation of a radical-pair in European robin cryptochrome 4a ...
Katharina Görtemaker   +11 more
doaj   +1 more source

EPR Study of UV-irradiated Thymidine Microcrystals Supports Radical Intermediates in Spore Photoproduct Formation [PDF]

open access: yes, 2016
Spore photoproduct is a thymidine dimer formed when bacterial endospore DNA is exposed to ultraviolet (UV) radiation. The mechanism of formation of this thymidine dimer has been proposed to proceed through a radical-pair intermediate.
Hayes, Ellen C.   +3 more
core   +2 more sources

The Radical Pair Mechanism of Animal Magnetoreception

open access: yes, 2020
Animal magnetoreception is the phenomenon by which some night-migratory birds can make seasonal migrations by utilising a light-dependent response to the Earth’s magnetic field (MF) for directional information. At ~25-65µT, the geomagnetic field is generally considered impotent upon biological molecules [1].
D'Souza, Edeline M   +3 more
openaire   +1 more source

Searching for unity in diversity of animal magnetoreception: From biology to quantum mechanics and back

open access: yesThe Innovation, 2022
How animals sense the geomagnetic field remains a mystery today. A remarkable diversity has been revealed in animal magnetoreception and several sophisticated models have been put forward in the past few decades, but none have been commonly accepted yet.
Can Xie
doaj   +1 more source

Probing the photoreactivity of aryl chlorides with oxygen [PDF]

open access: yes, 2009
Molecular oxygen was used to probe the mechanism of the phototransformation of chlorobenzene and 4-chloroanisole in organic solvents. Laser. ash photolysis, electron paramagnetic resonance and product distribution studies clarified the reaction ...
Bennett   +39 more
core   +2 more sources

A combined "electrochemical-frustrated Lewis pair" approach to hydrogen activation: surface catalytic effects at platinum electrodes [PDF]

open access: yes, 2014
Herein, we extend our “combined electrochemical–frustrated Lewis pair” approach to include Pt electrode surfaces for the first time. We found that the voltammetric response of an electrochemical–frustrated Lewis pair (FLP) system involving the B(C6F5)3 ...
Ashley   +48 more
core   +2 more sources

Quantum measurement corrections to CIDNP in photosynthetic reaction centers

open access: yesNew Journal of Physics, 2013
Chemically induced dynamic nuclear polarization is a signature of spin order appearing in many photosynthetic reaction centers. Such polarization, significantly enhanced above thermal equilibrium, is known to result from the nuclear spin sorting inherent
Iannis K Kominis
doaj   +1 more source

Applications of the Conceptual Density Functional Theory Indices to Organic Chemistry Reactivity [PDF]

open access: yes, 2016
Indexación: Web of ScienceTheoretical reactivity indices based on the conceptual Density Functional Theory (DFT) have become a powerful tool for the semiquantitative study of organic reactivity.
Domingo, Luis R.   +2 more
core   +2 more sources

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