10852 research outputs found
Sort by
マイレビュー : オレフィン重合触媒の開発《マイレビュー》
Get PDFNew olefin polymerization/oligomerization catalysts were developed by immobilizing metal complexes on layered clay minerals such as montmorillonite and fluorotetrasilicic mica. In the initial research stage, group 4 metallocene complex supported on acid-treated montmorillonite was prepared and tested in ethylene polymerization. The supported metallocene catalyst showed high catalytic activity and afforded polyethylene derived from a single-site catalyst. In the second stage, novel heterogeneous catalysts were developed by reacting a bi - or tri-dentate ligand and a late transition metal ion-exchanged mica (Fe3+-mica and Ni2+-mica). Those catalysts were readily activated by conventional alkyl aluminum compounds such as triethyl aluminum and triisobutyl aluminum, showing highly high catalytic activity for ethylene polymerization and oligomerization. In the final stage, hybrid ethylene polymerization catalysts consisting of two metal complexes with different specific properties were developed to improve melt processability by controlling PE's molecular weight distribution (MWD). Those catalysts were capable of controlling PE's MWD by adjusting the ratio of the supported metal complexes.textapplication/pd
理科教育における「Assessment as Learning」を促す「フィードバック」に関する研究 : 東井義雄の教育実践に着目して<教育科学>
Get PDFThis study aims to analyze teachers’ comments from the perspective of "self-evaluation" based on the characteristics of Toui's comments, and to clarify which characteristics of teachers' comments as "feedback" foster "Assessment as Learning" in science education. Specifically, I sort out the characteristics of Toui's comments as established by previous studies, and then, using these results, I look at the teacher’s comments in those instances in which "metacognition" was presumably enhanced in order to analyze them. I arrive at the following four points. The first is that the comments lead learners to become aware of how science views and thinks about the world. The second is that they encouraged learners to form "objects of learning". The third is that they fostered a relationship of trust between learners and teachers. The fourth is that they encouraged teachers to perform "self-evaluation" and contributed to the teachers’ own growth. From the above, I conclude that Toui style comments are effective tools to establish "Assessment as Learning" for both learners and teachers.textapplication/pd
Macroeconomic Stabilization through Long-term Fiscal Policy Anchor in Resource Rich Countries
Get PDF学位記番号 : 博人社甲第64号博士の専攻分野の名称 : 博士(経済学)
学位授与年月日 : 令和7年3月25日textapplication/pd
Characterization and the subsquent health hazards of polluted micro-plastics, polycyclic aromatic hydrocarbons and heavy metals in the bangladesh agricultural soils
Get PDF学位記番号 : 博理工甲第1372号博士の専攻分野の名称 : 博士（学術）
学位授与年月日 : 令和7年3月25日textapplication/pd
コーヒー粉残渣などの適正処理および有効利用技術に関する研究
Get PDF学位記番号 : 博理工甲第1374号博士の専攻分野の名称 : 博士（工学）
学位授与年月日 : 令和7年3月25日textapplication/pd