The Experts below are selected from a list of 30036 Experts worldwide ranked by ideXlab platform
V. Yu. Spivak - One of the best experts on this subject based on the ideXlab platform.
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Transmission of Mössbauer rays through ferromagnets in radio-frequency magnetic field
Hyperfine Interactions, 2013Co-Authors: A. Ya. Dzyublik, E. K. Sadykov, G. I. Petrov, V. V. Arinin, F. G. Vagizov, V. Yu. SpivakAbstract:The transmission of Mössbauer radiation through a thick ferromagnetic crystal, exposed to a radio-frequency (rf) magnetic field, is studied. The quantum-mechanical dynamical scattering theory is developed, taking into account the periodical reversals of the magnetic field at the nuclei. The Mössbauer forward scattering (FS) spectra of the weak ferromagnet FeBO_3 placed into rf field are measured. It is found that the coherent Gamma Wave in the crystal absorbs or emits only couples of the rf photons. As a result, the FS spectra consist of equidistant lines spaced by twice the frequency of the rf field in contrast to the absorption spectra.
A. Ya. Dzyublik - One of the best experts on this subject based on the ideXlab platform.
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Transmission of Mössbauer rays through ferromagnets in radio-frequency magnetic field
Hyperfine Interactions, 2013Co-Authors: A. Ya. Dzyublik, E. K. Sadykov, G. I. Petrov, V. V. Arinin, F. G. Vagizov, V. Yu. SpivakAbstract:The transmission of Mössbauer radiation through a thick ferromagnetic crystal, exposed to a radio-frequency (rf) magnetic field, is studied. The quantum-mechanical dynamical scattering theory is developed, taking into account the periodical reversals of the magnetic field at the nuclei. The Mössbauer forward scattering (FS) spectra of the weak ferromagnet FeBO_3 placed into rf field are measured. It is found that the coherent Gamma Wave in the crystal absorbs or emits only couples of the rf photons. As a result, the FS spectra consist of equidistant lines spaced by twice the frequency of the rf field in contrast to the absorption spectra.
Ekkasit Kumarnsit - One of the best experts on this subject based on the ideXlab platform.
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Gamma Wave oscillation and synchronized neural signaling between the lateral hypothalamus and the hippocampus in response to hunger.
Journal of Physiological Sciences, 2015Co-Authors: Nifareeda Samerphob, Dania Cheaha, Surapong Chatpun, Ekkasit KumarnsitAbstract:The lateral hypothalamus plays an important role in homeostasis. It is sensitive to negative energy balance and believed to interact with other brain regions to mediate food seeking behavior. However, no neural signaling of hunger in the lateral hypothalamus has been studied. Male Swiss albino mice implanted with intracranial electrodes into the lateral hypothalamus and the hippocampus were randomly treated with drinking water for control condition, 18–20 h deprivation of food for hunger condition, and fluid food for satiety condition. Therefore, local field potential (LFP) and locomotor activity of animals were simultaneously recorded. One way ANOVA with Tukey’s post hoc test was used for statistical analysis. Frequency analysis of LFP revealed that food deprivation significantly increased the power of Gamma oscillation (65–95 Hz) in the lateral hypothalamus and the hippocampus. However, satiety did not change the oscillation in these regions. Moreover, no significant difference among groups was observed for locomotor count and speed. The analysis of coherence values between neural signaling of these two brain areas also confirmed significant increase within a frequency range of 61–92 Hz for hunger. No change in coherence value was induced by satiety. In summary, this study demonstrated neural signaling of the lateral hypothalamus in response to hunger with differential power spectrum of LFP and the interplay with the hippocampus. The data may suggest critical roles of the lateral hypothalamus in detection of negative energy balance and coordination of other higher functions for food related learning or behaviors through the connectivity with the hippocampus.
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Low Gamma Wave oscillations in the striatum of mice following morphine administration
The Journal of Physiological Sciences, 2015Co-Authors: Chayaporn Reakkamnuan, Siriphun Hiranyachattada, Ekkasit KumarnsitAbstract:Functional role of the striatum in motor control has been widely studied. In addition, its involvement in reward function as a brain area in the dopamine system has also been mentioned. However, neural signaling in the striatum in response to consumption of emotional enhancing substances remained to be explored. This study aimed to investigate local field potential (LFP) of the striatum following morphine administration. Male Swiss albino mice implanted with electrode into the striatum were given an intraperitoneal injection of either saline or morphine (5 or 15 mg/kg). LFP and locomotor activity of individual animals were simultaneously recorded in the recording chamber following the administration. The inspection of LFP tracings revealed the increase in fast Wave induced by morphine particularly at a high dose. Statistical analyses were performed using a one way ANOVA followed by Tukey post hoc test. Frequency analysis using Fast Fourier transform also confirmed a significant elevation of low Gamma (30-44.9 Hz) activity. When analyzed in time domain, significant increase in low Gamma power was observed from the 15^th to 65^th min following 15 mg/kg morphine treatment. Moreover, morphine treatment also exhibited a stimulating effect on locomotor speed. However, regression analyses revealed no significant correlation between low Gamma power and locomotor speed. In summary, this study demonstrated the increase in low Gamma oscillation in the striatum and this effect was not associated with locomotor activity of animals. Thus, it is possible that low Gamma oscillation induced by morphine treatment is related with the reward function.
F. G. Vagizov - One of the best experts on this subject based on the ideXlab platform.
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Transmission of Mössbauer rays through ferromagnets in radio-frequency magnetic field
Hyperfine Interactions, 2013Co-Authors: A. Ya. Dzyublik, E. K. Sadykov, G. I. Petrov, V. V. Arinin, F. G. Vagizov, V. Yu. SpivakAbstract:The transmission of Mössbauer radiation through a thick ferromagnetic crystal, exposed to a radio-frequency (rf) magnetic field, is studied. The quantum-mechanical dynamical scattering theory is developed, taking into account the periodical reversals of the magnetic field at the nuclei. The Mössbauer forward scattering (FS) spectra of the weak ferromagnet FeBO_3 placed into rf field are measured. It is found that the coherent Gamma Wave in the crystal absorbs or emits only couples of the rf photons. As a result, the FS spectra consist of equidistant lines spaced by twice the frequency of the rf field in contrast to the absorption spectra.
V. V. Arinin - One of the best experts on this subject based on the ideXlab platform.
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Transmission of Mössbauer rays through ferromagnets in radio-frequency magnetic field
Hyperfine Interactions, 2013Co-Authors: A. Ya. Dzyublik, E. K. Sadykov, G. I. Petrov, V. V. Arinin, F. G. Vagizov, V. Yu. SpivakAbstract:The transmission of Mössbauer radiation through a thick ferromagnetic crystal, exposed to a radio-frequency (rf) magnetic field, is studied. The quantum-mechanical dynamical scattering theory is developed, taking into account the periodical reversals of the magnetic field at the nuclei. The Mössbauer forward scattering (FS) spectra of the weak ferromagnet FeBO_3 placed into rf field are measured. It is found that the coherent Gamma Wave in the crystal absorbs or emits only couples of the rf photons. As a result, the FS spectra consist of equidistant lines spaced by twice the frequency of the rf field in contrast to the absorption spectra.
