A short review of the main trends in neurophysiological research of the gating mechanism of pain perception is presented. The original model of Melzack and Wall has been modified in two aspects. First - postsynaptic inhibition and increased concentration of potassium ions in the extracellular space play a role in the modulation of impulse transmission at the segmental level of the spinal cord. ...

We report measurements of the infrared optical response of thin black phosphorus under field-effect modulation. We interpret the observed spectral changes as a combination of an ambipolar Burstein-Moss (BM) shift of the absorption edge due to band-filling under gate control, and a quantum confined Franz-Keldysh (QCFK) effect, phenomena that have been proposed theoretically to occur for black ph...

The design and application of an H2O/temperature sensor based on scanned calibration-free wavelength modulation spectroscopy (CF-WMS) and a single tunable diode laser at 1.4 μm is presented. The sensor probes two H2O absorption peaks in a single scan and simultaneously retrieves H2O concentration and temperature by least-squares fitting simulated 1f-normalized 2f-WMS spectra to measured 2f/1f-W...

This study evaluates the role of glycine in in vivo modulation of the activity of excitatory amino acid receptors sensitive to N-methyl-D-aspartate (NMDA) in the rabbit hippocampus. Changes of extracellular calcium concentration were studied by the microdialysis technique combined with 45Ca-utilizing clearance method. The steady state level of amino acids in the dialysate was analyzed with HPLC...

Photo-modulation voltammetry with a 325-nm beam from a He-Cd laser was applied to an examination of a photochemical reaction of p-aminodiphenylamine. The photo-modulation voltammogram exhibited a peaked wave proportional to the concentration of p-aminodiphenylamine, and essentially agreed with a difference between linear scan voltammograms under irradiation and non-irradiation. From the absorpt...

In this paper, we describe a method of optimum temperature modulation of metal oxide semiconductor (MOS) based gas sensor, operated in dynamic temperature measurement for identification of gas. The volatile organic compound (VOC) sample space consists of fourteen laboratory chemicals sampled at various concentration. We have used eleven number of gas sensors, manufactured by Figaro sensors, Jap...

In this letter, we demonstrate that random Brownian forces can be used for effective trapping and manipulation of nanoparticles and molecules on surfaces in the presence of strong temperature modulation. Substantial (~ 2 orders of magnitude) increase in the modulation of particle concentration (trapping efficiency) compared to thermophoresis in a bulk medium is predicted and explained by a peri...

We study the tunneling into the edge of the Luttinger liquid with periodically modulated concentration of electrons. It is shown that the modulation, by causing a gap in the spectrum of plasmons, leads to an additional anomaly in the density of states at frequency corresponding to the center of the gap. The shape of the anomaly depends strongly on the phase of the modulation. The sensitivity to...

Electrical transport in a modulation doped heterostructure of I~.~.s3G~.,,As/In,52Alo.48as grown on Si by molecular beam epitaxy has been measured. Quantum Hall effect and Subnikov-De Haas oscillations were observed indicating the two-dimensional character of electron transport. A mobility of 20 000 cm’/V s was measured at 6 K for an electron sheet concentration of 1.7X10” cm-’ . Transmission e...