نتایج جستجو برای: protons
تعداد نتایج: 22490 فیلتر نتایج به سال:
Copious x-ray production is shown to attend the collisions of suprathermal (?MeV) protons with ambient electrons,via a process of inverse bremsstrahlung. Such suprathermal protons have been detected in cosmic rays and in solar f lare events; the inverse bremsstrahlung of such cosmic ray protons is expected to make a significant contribution to the diffuse sky background of x-rays and supratherm...
The electromechanical response of a Nafion membrane immersed in water was probed using electrochemical strain microscopy (ESM) to redistribute protons and measure the resulting local strain that is caused by the movement of protons. We also measured the relaxation of protons from the surface resulting from proton diffusion. Using this technique, we can visualize and analyze the local strain cha...
Stimulating presynaptic terminals can increase the proton concentration in synapses. Potential receptors for protons are acid-sensing ion channels (ASICs), Na(+)- and Ca(2+)-permeable channels that are activated by extracellular acidosis. Those observations suggest that protons might be a neurotransmitter. We found that presynaptic stimulation transiently reduced extracellular pH in the amygdal...
Estimation of extrinsic (kex) and intrinsic (krc) exchange rate constants for labile protons of proteins is indispensable to determine the residuespecific free energies. While kex of labile protons in proteins are determined by experimental methods, the krc of those protons are calculated based on the parameters derived from the model compound studies, in general. We, herein, describe a computa...
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