Multielement systems of double slots in rectangular waveguide with partial dielectric filling
Resonance characteristics of narrow transversal slots, energetic and directional characteristics of an antenna array (AA) with single transversal slots and double ones cut in a rectangular waveguide, partially filled with dielectric are investigated. In the case of the single transversal slots and double transversal slots a dielectric layer is parallel to broad walls of the waveguide. It was shown the possibility to construct an AA with double transversal slots the pattern without diffraction lobes and high level of radiation power in the frequency band.
Slot radiators in a rectangular waveguide partly filled with dielectric
Resonance and power characteristics of narrow transversal and longitudinal slots in a rectangular waveguide with a dielectric layer are investigated. In the case of the transversal slots a dielectric layer is parallel to broad walls and for longitudinal slots it is parallel to narrow ones. It was shown the possibility of transversal slot resonance radiation in a singlemode operation when the waveguide wavelength is shorter than one in the free space. The validity of the algorithm built for the longitudinal slot is conformed. The reliability of numerical results are confirmed experimentally. The results are useful for slot antenna design and antenna array development that is important for radar hardware and technology applications.
Thorium-induced Anatomical and Histopathological Changes in Liver of Swiss Mice
ObjectivePresent study is aimed to investigate the anatomical and histopathological changes in liver tissues of Swiss albino male mice, one month after intravenous administration of thorium (232Th; 4 and 40 mg/kg).MethodsSynchrotron X-ray micro-CT imaging, CD31 immuno-cytochemistry, hematoxylin & eosin staining and Periodic acid-Schiff staining were performed to study changes in liver anatomy, blood vessels/capillaries, histology and glycogen content of liver, respectively.ResultsSynchrotron X-ray micro-CT imaging of liver showed loss of blood vessels in mice treated with thorium (4 mg/kg), which was more prominent at higher dose of thorium (40 mg/kg). These thorium-induced changes in liver were correlated with the decrease in CD31 positive cells and loss of tissue architecture. A dose-dependent increase in glycogen content was also observed in the liver of thorium-treated mice.ConclusionOur results provide novel insight about the effects of thorium on liver, which may have significant implications in understanding the mechanism of thorium thorium-induced hepatotoxicity.