Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7986084 | Micron | 2018 | 15 Pages |
Abstract
We investigate a motion of diatom cells stimulated by a halogen lamp irradiation. Diatom cells are single-celled organisms which have chloroplast. Chloroplast contains photosynthetic pigment which absorbs blue light (wave length of the light is 400â¯nm-450â¯nm) and red one (650â¯nm-700â¯nm). Light intensity of the halogen lamp is fixed about 500â¯Lx during the experiment. We used colored films to cut the blue or red light and observed motion of diatom cells by using the optical microscope. We found that the speed of diatom cells decreases when the colored film is inserted, and it increases after ejecting the film. It is noted that the light intensity is constant during the experiment, which means that we change wave length of the irradiated light. Our results show that the average speed of diatom cells is influenced by not the light intensity but the wave length of the light.
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Physical Sciences and Engineering
Materials Science
Materials Science (General)
Authors
Hisao Taira, Shunsuke Kondo, Yoshikazu Kumashiro, Shigeki Mayama, Kazuo Umemura,