@article{oai:mue.repo.nii.ac.jp:00000260,
 author = {池山, 剛},
 journal = {宮城教育大学紀要, Bulletin of Miyagi University of Education},
 month = {Jan},
 note = {A simple experimental method to determine the oxygen concentration in the atomosphere is proposed. A disposable pocket heater is used as an oxygen  absorber without opening its inner packages. Volume of air and its change after the oxygen consumption is easily observed by using a plastic syringe in which the  disposable pocket heater is set. To finish the experiment in 15 minutes, some necessary technique is also proposed. By the simple experiment, the amount of the oxygen is shown to be approximately one-fifth of the air with an actual feeling of the volume decrease.},
 pages = {101--104},
 title = {空気中の酸素濃度の測定 : 使い捨てカイロを用いた簡易で実感を伴った実験},
 volume = {48},
 year = {2014}
}