バライト共沈に伴う元素分配機構の解明とその地球化学・環境学的な応用

広島大学(Hiroshima University)博士(理学)Doctor of Sciencedoctora

Subaru and Gemini High Spatial Resolution Infrared 18 Micron Imaging Observations of Nearby Luminous Infrared Galaxies

We present the results of a ground-based, high spatial resolution infrared 18 micron imaging study of nearby luminous infrared galaxies (LIRGs), using the Subaru 8.2-m and Gemini South 8.1-m telescopes. The diffraction-limited images routinely achieved with these telescopes in the Q-band (17-23 micron) allow us to investigate the detailed spatial distribution of infrared emission in these LIRGs. We then investigate whether the emission surface brightnesses are modest, as observed in starbursts, or are so high that luminous active galactic nuclei (AGNs; high emission surface brightness energy sources) are indicated. The sample consists of 18 luminous buried AGN candidates and starburst-classified LIRGs identified in earlier infrared spectroscopy. We find that the infrared 18 micron emission from the buried AGN candidates is generally compact, and the estimated emission surface brightnesses are high, sometimes exceeding the maximum value observed in and theoretically predicted for a starburst phenomenon. The starburst-classified LIRGs usually display spatially extended 18 micron emission and the estimated emission surface brightnesses are modest, within the range sustained by a starburst phenomenon. The general agreement between infrared spectroscopic and imaging energy diagnostic methods suggests that both are useful tools for understanding the hidden energy sources of the dusty LIRG population.Comment: 17 pages, 3 figures, accepted for publication in AJ (No. 141, 2011 May issue). Higher resolution version is available at http://optik2.mtk.nao.ac.jp/~imanishi/Paper/20um/20um.pd

A Case Study on the Effectiveness of the Trial Teaching in Physical Education for the Initial Teacher Training : The elements that students find out through watching the film of teaching in physical education

This study aims to propose the outline of the elements which students find out by watching the test film of physical education teaching after experiences of their trial teaching. The test film was developed by us and consisted of two students' trial physical education teaching on gymnastics. The results are summarised as follows. 1. The outline was consisted of the four upper categories "Performance of teaching", "Planning of teaching", "Environment of learning" and "Attitude of teacher". 2. The first upper category "Performance of teaching" consisted of three middle categories "Teaching activities", "Learning activities" and "Unfolding of teaching, gathering and transfer". 3. The first and second middle categories "Teaching activities" and "Learning activities" consisted of the four lower categories "Teaching skill", "Communication between a teacher and pupils", "Organization of mutual communication for pupils" and "Pupils' learning". 4. If students fail to find out the categories of the framework by watching the test film after experiences of their trial physical education teaching, it seems that the trial teaching should be improved concerning its methods and contents

Fluorobissulfonylmethyl Iodides: An Efficient Scaffold for Halogen Bonding Catalysts with an sp³‑Hybridized Carbon–Iodine Moiety

The halogen-bond donors FBSM-I and FBDT-I, which contain an sp³-hybridized carbon–iodine (C_sp³–I) moiety, were designed and synthesized. The highly electron-withdrawing nature of the fluorobissulfonyl-methane scaffold leads to the generation of σ-holes on the surface of the iodine atoms in FBSM-I and FBDT-I. Mukaiyama aldol reactions and hydrogen-transfer reductions are efficiently catalyzed by FBSM-I and FBDT-I under neutral and mild reaction conditions. The driving force for these transformations should be the halogen bonding induced by FBSM-I and FBDT-I, which was confirmed by DFT calculations, single-crystal X-ray diffraction analyses, and NMR titrations

Neoadjuvant chemotherapy for locally advanced gastric cancer in Japan: Consensus meeting at the 77th general meeting of the Japanese Society of Gastroenterological Surgery

Abstract Treatment strategy for locally advanced gastric cancer differs worldwide. Neoadjuvant chemotherapy (NAC) is considered one of the promising treatment options for locally advanced gastric cancer, even in Japan, and clinical trials have been conducted or are ongoing. A consensus meeting was organized at the 77th general meeting of the Japanese Society of Gastroenterological Surgery in 2022, in which the current status and future prospects of NAC for locally advanced gastric cancer were discussed. Participants at the meeting looked forward to the results of the JCOG1509 trial, providing solid evidence regarding NAC. The optimal indications and regimens for NAC were also debated. Patients with cStage III gastric cancer are the main targets of NAC in Japan, and a doublet regimen of S‐1 and oxaliplatin was preferred by the participants. However, the feasibility of a triplet regimen with S‐1, oxaliplatin, and docetaxel, and that with 5‐FU, leucovorin, oxaliplatin, and docetaxel has been demonstrated, and these could become treatment options in Japan. Other points of discussion include perioperative chemotherapy to avoid peritoneal recurrence and for patients with dMMR/MSI‐high tumors. The panel regarded NAC as a promising treatment option, and NAC will become the standard treatment for cStage III gastric cancer in Japan if an ongoing clinical trial successfully demonstrates its efficacy