Zinc transporter ZnT3/Slc30a3 has a potential role in zinc ion influx in mouse oocytes

Zinc is an essential trace element for various physiological functions, including reproduction. The influx/efflux of zinc ions is regulated by zinc transporters (Zip1-14 and ZnT1-8, 10). However, the precise roles of zinc transporters and zinc dynamics in reproductive functions are unknown. In this study, ZnT3/Slc30a3 gene knockout (KO) mice were used to analyze the role of ZnT3. In ZnT3 KO mice, intracellular zinc ions in oocytes/zygotes were significantly reduced compared to those in controls, and free zinc ions did not accumulate in the oocyte cytoplasm. However, fertilization of these oocytes and the average litter size were comparable to those of control mice. Our results suggest that ZnT3 plays an important role in the accumulation of zinc ions in oocytes but not in the developmental ability of mice. ZnT3 KO mice will be useful for examining zinc dynamics in oocytes and other tissues.journal articl

駐車場所－駐車時間選択行動への離散－連続選択モデルの適用と駐車料金施策分析

In the central city area, the vehicles queuing to the parking lot and/or illegally parked on-street cause serious road traffic congestion. This study develops discrete-continuous choice model of parking location and duration in order to better understanding drivers’ parking behavior. We apply a simultaneous estimation technique to overcome an inconsistency of a conventional estimation result, and apply WESML estimator because of choice-based sample obtained from mail-in survey. As a result of the analysis concerning the parking price discount measure for reducing the illegal parking on-street, it was shown that the results with a discrete-continuous choice model were greatly different from those with a usual MNL model and a regression model.journal articl

Improved Search for νμ→νe Oscillation in a Long-Baseline Accelerator Experiment

journal articl

The effectiveness of sensitivity training focusing on emotional attunement to infants and children : for graduate students of clinical psychology

Training institutes, including graduate schools for clinical psychology have been producing qualified and skilled clinical psychologists in society. In order to become good clinical psychologists, the candidates need to have not only knowledge and skills in the subject area but should also have personal characteristics such as sensitivity, empathy, and introspection. In this study a sensitivity training program, which focused on emotional attunement to infants and children, was developed and its effectiveness was investigated using three questionnaires : the perceived coding ability scale, the interpersonal sensitivity measure, and the non-verbal sensitivity scale. Out of 60 graduate students, 18 participated in this program once a week at a nursery school for a period of 5 months. The results showed that the scores of the perceived coding ability scale were significantly increased for students who participated in this program but there was no difference in the scores of the other two scales. The results also showed that there were significant differences between the scores of students who participated in the program and those who did not, with respect to the perceived coding ability and interpersonal sensitivity scales. Students who participated in this program showed higher sensitivity scores even before participating in this program. Therefore, we concluded that the program needs to focus more on emotional attunement and the selection process must change such that all students participate in this program.departmental bulletin pape

方城鑛區右方稼行ノ方針

東京帝国大学工科大学種別:卒業論文thesi

Tuning the Nanoarea Interfacial Properties for the Improved Performance of Li-Rich Polycrystalline Li-Mn‑O Spinel

The nontoxicity and low cost make LiMn2O4 a competitive cathode material for lithium-ion batteries. LiMn2O4 has a high theoretical capacity (296 mAh g–1) when cycled in the 3 and 4 V regions. However, it displays a low practical capacity (∼120 mAh g–1) because of the unavailability of the 3 V region caused by severe Jahn–Teller distortion. The present work investigated the full utilization of LiMn2O4 in both 3 and 4 V by tuning the nanoscale interfacial properties. Li-rich structures at the surface and interface of the spinel material and nanograin strain were introduced to improve the performances and were achieved by grinding LiMn2O4 and Li2O at 700 rpm for 10 h under an argon atmosphere. The product shows a high initial discharge capacity of 287.9 mAh g–1 at 0.05 C between 1.2 and 4.6 V and retains 83.2% of the capacity after 50 cycles. The nanoscale interfacial structure was clarified by spherical aberration-corrected microscopy and XRD refinement, and complex occupancies of Li and Mn were found at the interface. A correlation between the interfacial properties and electrochemical performance was established, and the improved performance could be attributed to the polycrystalline nature of the material, the unique Li-rich interfacial structure, and the slightly elevated valence state of Mn. The present results may provide insight for further evaluating the complex mechanism of controlling the electrochemical performance of LiMn2O4

Tuning the Nanoarea Interfacial Properties for the Improved Performance of Li-Rich Polycrystalline Li-Mn‑O Spinel

The nontoxicity and low cost make LiMn2O4 a competitive cathode material for lithium-ion batteries. LiMn2O4 has a high theoretical capacity (296 mAh g–1) when cycled in the 3 and 4 V regions. However, it displays a low practical capacity (∼120 mAh g–1) because of the unavailability of the 3 V region caused by severe Jahn–Teller distortion. The present work investigated the full utilization of LiMn2O4 in both 3 and 4 V by tuning the nanoscale interfacial properties. Li-rich structures at the surface and interface of the spinel material and nanograin strain were introduced to improve the performances and were achieved by grinding LiMn2O4 and Li2O at 700 rpm for 10 h under an argon atmosphere. The product shows a high initial discharge capacity of 287.9 mAh g–1 at 0.05 C between 1.2 and 4.6 V and retains 83.2% of the capacity after 50 cycles. The nanoscale interfacial structure was clarified by spherical aberration-corrected microscopy and XRD refinement, and complex occupancies of Li and Mn were found at the interface. A correlation between the interfacial properties and electrochemical performance was established, and the improved performance could be attributed to the polycrystalline nature of the material, the unique Li-rich interfacial structure, and the slightly elevated valence state of Mn. The present results may provide insight for further evaluating the complex mechanism of controlling the electrochemical performance of LiMn2O4

Tuning the Nanoarea Interfacial Properties for the Improved Performance of Li-Rich Polycrystalline Li-Mn‑O Spinel

The nontoxicity and low cost make LiMn2O4 a competitive cathode material for lithium-ion batteries. LiMn2O4 has a high theoretical capacity (296 mAh g–1) when cycled in the 3 and 4 V regions. However, it displays a low practical capacity (∼120 mAh g–1) because of the unavailability of the 3 V region caused by severe Jahn–Teller distortion. The present work investigated the full utilization of LiMn2O4 in both 3 and 4 V by tuning the nanoscale interfacial properties. Li-rich structures at the surface and interface of the spinel material and nanograin strain were introduced to improve the performances and were achieved by grinding LiMn2O4 and Li2O at 700 rpm for 10 h under an argon atmosphere. The product shows a high initial discharge capacity of 287.9 mAh g–1 at 0.05 C between 1.2 and 4.6 V and retains 83.2% of the capacity after 50 cycles. The nanoscale interfacial structure was clarified by spherical aberration-corrected microscopy and XRD refinement, and complex occupancies of Li and Mn were found at the interface. A correlation between the interfacial properties and electrochemical performance was established, and the improved performance could be attributed to the polycrystalline nature of the material, the unique Li-rich interfacial structure, and the slightly elevated valence state of Mn. The present results may provide insight for further evaluating the complex mechanism of controlling the electrochemical performance of LiMn2O4

トンネル内の自動車排気ガス汚染

application/pdfpostprintOne of the trouble about tunnelis nuisance of auto exhaust gas for foot passenger. On account of few example of field measurement to polluted phenomena in tunnel, the technical countermeasure would not be considered easily. So that, as a means to improve such a state, a distribution of CO concentration was examined. Samples of 93 points in and around the tunnel of 270m length were collected and measured about CO by gas chromatography with reaction tube. The result shows as a distribution graph as follows. It was found that exhaust gas was sent out from tunnel and the complex pollution with high level was formed.departmental bulletin pape