Phase structure of topological insulators by lattice strong-coupling expansion

The effect of the strong electron correlation on the topological phase structure of 2-dimensional (2D) and 3D topological insulators is investigated, in terms of lattice gauge theory. The effective model for noninteracting system is constructed similarly to the lattice fermions with the Wilson term, corresponding to the spin-orbit coupling. Introducing the electron-electron interaction as the coupling to the gauge field, we analyze the behavior of emergent orders by the strong coupling expansion methods. We show that there appears a new phase with the in-plane antiferromagnetic order in the 2D topological insulator, which is similar to the so-called "Aoki phase" in lattice QCD with Wilson fermions. In the 3D case, on the other hand, there does not appear such a new phase, and the electron correlation results in the shift of the phase boundary between the topological phase and the normal phase.Comment: 7 pages, 2 figures; Presented at the 31st International Symposium on Lattice Field Theory (Lattice 2013), 29 July - 3 August 2013, Mainz, German

Efficient retroviral transduction of human B-lymphoid and myeloid progenitors: marked inhibition of their growth by the Pax5 transgene

We applied a coculture system for the genetic manipulation of human B-lymphoid and myeloid progenitor cells using murine bone marrow stromal cell support, and investigated the effects of forced Pax5 expression in both cell types. Cytokine-stimulated cord blood CD34+ cells could be transduced at 85% efficiency and 95% cell viability by a single 24-h infection with RD114-pseudotyped retroviral vectors, produced by the packaging cell line Plat-F and bicistronic vector plasmids pMXs-Ig, pMYs-Ig, or pMCs-Ig, encoding EGFP. Infected CD34+ cells were seeded onto HESS-5 cells in the presence of stem cell factor and granulocyte colony-stimulating factor, allowing the extensive production of B progenitors and granulocytic cells. We examined the cell number and CD34, CD33, CD19, and CD20 lambda and kappa expressions by flow cytometry. Ectopic expression of Pax5 in CD34+ cells resulted in small myeloid progenitors coexpressing CD33 and CD19 and inhibited myeloid differentiation. After 6 weeks, the number of Pax5-transduced CD19+ cells was 40-fold lower than that of control cells. However, the expression of CD20 and the κ/λ chain on Pax5-transduced CD19+ cells suggests that the Pax5 transgene may not interfere with their differentiation. This report is the first to describe the effects of forced Pax5 expression in human hematopoietic progenitors

子供の家庭環境と生活習慣に関連した社会・健康問題：長時間メディア・低い学力・便秘

富山大学・富医薬博乙第74号・山田 正明・2019/08/28関連論文1．Masaaki Yamada, Michikazu Sekine, Takashi Tatsuse. Parental Internet Use and Lifestyle Factors as Correlates of Prolonged Screen Time of Children in Japan: Results From the Super Shokuiku School Project, Journal of Epidemiology, 2018, 28 巻, 10 号, p. 407-413, https://doi.org/10.2188/jea.JE201701002．Yamada, M., Sekine, M., Tatsuse, T. et al. Association between lifestyle, parental smoke, socioeconomic status, and academic performance in Japanese elementary school children: the Super Diet Education Project, Environ Health Prev Med (2019) 24: 22. https://doi.org/10.1186/s12199-019-0776-x 3．Masaaki Yamada, Michikazu Sekine, Takashi Tatsuse. Psychological Stress, Family Environment, and Constipation in Japanese Children: The Toyama Birth Cohort Study, Journal of Epidemiology, 2019, 29 巻, 6 号, p. 220-226, https://doi.org/10.2188/jea.JE201800164．Yamada, M., Sekine, M., Tatsuse, T. et al. Lifestyle, psychological stress, and incidence of adolescent constipation: results from the Toyama birth cohort study. BMC Public Health 21, 47 (2021). https://doi.org/10.1186/s12889-020-10044-5富山大

Country specific associations between social contact and mental health : evidence from civil servant studies across Great Britain, Japan and Finland

Peer reviewe

Filled skutterudite structure of europium ruthenium polyphosphide, EuRu4P12

The crystal structure of EuRu4P12 is isotypic with filled skutterudite structures of rare earth transition metal poly­phosphides: RFe4P12 (R = Ce, Pr, Nd, Sm and Eu), RRu4P12 (R = La, Ce, Pr and Nd) and ROs4P12 (R = La, Ce, Pr and Nd). The Ru cation is coordinated by six P anions in a distorted octa­hedral manner. The partially occupied Eu position (site occupancy 0.97) is enclosed by a cage formed by the corner-shared framework of the eight RuP6 octa­hedra