文献一覧: CELSS journal (雑誌)

2 0 0 0 OA 植物生長におよぼす重力影響実験用重力制御型ファイトトロンの設計・製作

著者: 谷晃西浦芳史清田信村瀬治比古穂波信雄
出版者: 生態工学会
雑誌: CELSS JOURNAL (ISSN:09154353)
巻号頁・発行日: vol.6, no.2, pp.11-16, 1994-03-28 (Released:2010-12-16)
参考文献数: 5

A centrifugal phytotron was designed and fabricated to study the effects of gravity on the growth of plant. The magnitude of centrifugal force can be selected arbitrarily up to 4G by controlling angular velocity of cultivation drum (1 m diameter). Environmental factors in this phytotron such as temperature, humidity, CO2 concentration and light intensity can also be conditioned.On the earth, different magnitude and different direction of artificial gravity, which is centrifugal force plus 1G earth gravity, distribute over the cultivation drum. Results of spectral analysis on vibration of the cultivation drum showed that overall vibration changed with centrifugal force and ranged from 0.7 to 2.1G.Wind velocity over the cultivation drum increased with raising centrifugal force and ranged from 1.5 to 2.7 m s-1.Results of preliminary cultivation experiment with radish (Raphanus sativus L.) showed that mean dry weight of the plants cultivated under centrifugal force of 2G was not significantly different from that of the plants cultivated under centrifugal force of 1G, and root/total dry weight ratio increased with raising centrifugal force. These tendency, however, might be due to several physical factors described above.Isolation of gravitational effect on the plant growth from existing influential factors such as the vibration and wind will be required for further experiment.

2017-04-01 10:22:05
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1 0 0 0 OA アンドロメダ病原体が襲って来る今, なぜ宇宙検疫の国際的基準が必要か

著者: 小池惇平
出版者: 生態工学会
雑誌: CELSS JOURNAL (ISSN:09154353)
巻号頁・発行日: vol.8, no.1, pp.27-32, 1995-09-30 (Released:2010-12-16)
参考文献数: 11

We have studied on the ability of living organisms to survive under simulated extraterrestrial condition. The subject is not restricted to an academic curiosity, but concerns problems to prevent the contamination of extraterrestrial circumstance with terrestrial microorganisms carried by spaceprobes. Some species of terrestrial microorganisms can survive even after the exposure under a simulated space conditions.Samples of microb were harvested from air and wall surface in Mir station by Progress M-26 on Feb. 15, 1995. The population of microorganisms and resistace to proton radiation by accelerator and ultra violet were examined.