中学校理科の光合成実験で用いられるインジゴカ-ミン法の改良

概要

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A reduced indigo carmine liquid turn easily from a transparent yellow color into a blue one by a oxidation. This principal is usually to the qualitative detection of oxygen evolved photosynthetically form plants in science of lower secondary school, However, thee method used at the science textbook has a disad- vantage that an air is apt to mix into the reduced indigo carmine solution on the way of experiment, and then the turning into blue color often occurs at the control experiment without the plant sample. Thus, it is difficult to detect whether the turned bllue color is brought about an oxygen evolved photosynthetically or not. Therefore, we attempted to improve the indigo carmine method and coule devise the apparatus capable of being avoided the mixing of air using a syringe as a reaction tube, Good results coule be obtained on the use of the present improved method. The improved indigo carmine method seems to be available to the photosynthetic experiment in science of lower secondary school.
長崎大学教育学部の論文