Clebsch representation of relativistic plasma and generalized enstrophy

The theory of relativistic plasmas is attracting interest as a model of high-energy astronomical objects. The topological constraints, built in the governing equations, play an essential role in characterizing the structures of plasmas. Among various invariants of ideal models, the circulation is one of the most fundamental quantities, being included in other invariants like the helicity. The conventional enstrophy, known to be constant in a two-dimensional flow, can be generalized, by invoking Clebsch variables, to the topological charge of a three-dimensional fluid element, which essentially measures circulations. Since the relativistic effect imparts space-time coupling into the metric, such invariants must be modified. The non-relativistic generalized enstrophy is no longer conserved in a relativistic plasma, implying that the conservation of circulation is violated. In this work, we extend the generalized enstrophy to a Lorentz covariant form. We formulate the Clebsch representation in relativity using the principle of least action and derive a relativistically modified generalized enstrophy that is conserved in the relativistic model

Catalytic Liquid-Phase Oxidation of Phenolic Compounds Using Ceria-Zirconia Based Catalysts

Catalytic liquid-phase oxidation using a catalyst and oxygen gas (Catalytic wet air oxidation, CWAO) is one of the most promising technology to remove hazardous organic compounds in wastewater. Up to now, various heterogeneous catalysts have been reported for phenolic compounds decomposition. The CeO2-ZrO2 based catalysts have been recently studied, because CeO2-ZrO2 works as a promoter which supplies active oxygen species from inside the lattice to the active sites. Since it is difficult to dissolve oxygen gas into water, the use of the promoter is effective for realizing the high catalytic activity at moderate conditions. Also, CeO2-ZrO2 shows high resistance for the metal leaching during the catalytic reaction in the liquid-phase. This article reviews the studies of the catalytic liquid-phase oxidation of phenolic compounds using CeO2-ZrO2 based catalysts

向精神薬服用患者の突然死症例におけるカリウムイオンチャネルに関する分子生物学的解析：QT延長症候群関連遺伝子の多型が危険因子となり得るか？

Psychotropic drugs can pose the risk of acquired long QT syndrome (LQTS). Unexpected autopsy-negative sudden death in patients taking psychotropic drugs may be associated with prolonged QT intervals and life-threatening arrhythmias. We analyzed genes that encode for cardiac ion channels and potentially associated with LQTS, examining specifically the potassium channel genes KCNQ1 and KCNH2 in 10 cases of sudden death involving patients administered psychotropic medication in which autopsy findings identified no clear cause of death. We amplified and sequenced all exons of KCNQ1 and KCNH2, identifying G643S, missense polymorphism in KCNQ1, in 6 of the 10 cases. A study analysis indicated that only 11% of 381 healthy Japanese individuals carry this polymorphism. Reports of previous functional analyses indicate that the G643S polymorphism in the KCNQ1 potassium channel protein causes mild IKs channel dysfunction. Our present study suggests that administering psychotropic drug therapy to individuals carrying the G643S polymorphism may heighten the risk of prolonged QT intervals and life-threatening arrhythmias. Thus, screening for the G643S polymorphism before prescribing psychotropic drugs may help reduce the risk of unexpected sudden death2013博士（歯学）松本歯科大

初年次基礎教育科目における予習課題および復習、Google Classroom を使用した小テストの学生の実施状況および学生からの評価

　初年次基礎教育科目「疾病治療概論」における予習課題、復習、Google Classroom を使用した小テストに対する評価を明らかにすることを目的として、A 大学の1 年生を対象にアンケート調査を行った。72 名より回答があり（回収率97.3％）、予習課題は授業内容の理解に役立ったかの質問には、“そう思う”が40.3％、“ややそう思う”が52.8％であった。復習は授業内容の理解に役立ったかの質問には、“そう思う”が61.4％、“ややそう思う”が38.6％であった。小テストは授業内容の理解に役立ったかの質問には、“そう思う”が56.3％、“ややそう思う”42.3％であり、今後の授業でもGoogle Classroom を使った小テストを希望する学生は65.3％であった。　web 経由でスマートフォンから手軽に解答できるツールは、授業内容の理解を高めることに有効であり、新型コロナウイルス感染症が流行している状況においても学習の継続に貢献できる可能性が示された