堀 一繁

type:Article 大阪教育大学・教職実践演習ミニ講座「理科の実験・観察における安全」(2019年度)の受講者の「理科実験における危険予測力」のルーブリック評価について報告する。このミニ講座は,理科の実験・観察を安全に行うために必要な知識と,それを支える理論的根拠や経験知を学ぶための授業(全5回)で構成されている。本稿で報告する授業実践では,酸・塩基の中和実験(高校化学基礎)を撮影・編集した動画の中に現れる危険な行為や兆候を受講者に発見させる。そして,そのような危険な行為・兆候を受講者がどの程度発見できたかを,ルーブリック評価表を用いて数値化することにより,各受講者の理科実験における危険予測力を定量評価する。 This paper reports an evaluation of safety management capability in science experiments. In the present study, safety management capability in science experiments is evaluated through a rubric score of a practice to find indications of danger in a science laboratory that appear in a video in which an experiment on neutralization of acids and bases is conducted in a first grade high school chemistry class. The practice is assigned to prospective teachers (fourth grade students in Osaka Kyoiku University) in a class of a course held in 2019 to learn how to safely conduct scientific experiments and observations. A rubric score of the practice can be a measure of safety management capability in science experiments.

Partially overlapped dicarbazolophanes exhibit a planar chirality. In this study, C-2-symmetrical [3.3](3,9)dicarbazolophane derivatives (CZ1-CZ3) have been optically resolved by preparative chiral high-performance liquid chromatography for the first time. In their circular dichroism (CD) spectra, moderate Cotton effects (CEs) were observed for their L-1(b) and L-1(a) transitions (vertical bar Delta epsilon vertical bar = 10-12 and 51-57 M-1 cm(-1), respectively), while intense CEs were notified in their B-1 transitions (vertical bar Delta epsilon vertical bar = 156-216 M-1 cm(-1)), absorption dissymmetry (g(abs)) factors being in orders of 10(-2). Circularly polarized luminescence spectrum was also obtained for cyanamide derivative CZ1, with a comparative luminescence dissymmetry (g(lum)) factor of 0.013. A computational investigation was applied to address the factors for such remarkable chiroptical responses in these dicarbazolophanes of planar chirality. Absolute configurations were unambiguously determined by the comparison of experimental and theoretical CD spectra, which was affirmed by the X-ray crystal structural analysis of enantiomerically pure sulfonamide derivative CZ2.