@inproceedings{oai:jaxa.repo.nii.ac.jp:00013213,
 author = {宮沢, 豊 and 岡本, 美貴 and 藤井, 伸治 and 高橋, 秀幸 and 石岡, 憲昭 and 山崎, 丘 and 鎌田, 源司 and 嶋津, 徹 and Miyazawa, Yutaka and Okamoto, Miki and Fujii, Nobuharu and Takahashi, Hideyuki and Ishioka, Noriaki and Yamazaki, Takashi and Kamada, Motoshi and Shimazu, Toru},
 book = {宇宙利用シンポジウム, Space Utilization Research: Proceedings of Space Utilization Symposium},
 month = {Feb},
 note = {第26回宇宙利用シンポジウム(2010年1月25日-26日, 宇宙航空研究開発機構宇宙科学研究本部相模原キャンパス), The Twenty-sixth Space Utilization Symposium (January 25-26, 2010: ISAS/JAXA Sagamihara, Japan), Plant roots display not only gravitropism but also hydrotropism for determining their growth orientation. Previously, we found that gravitropism interferes with hydrotropism, which led us to prepare a spaceflight experiment for separating hydrotropism from gravitropism under microgravity condition, namely in KIBO module of International Space Station. Cucumber seeds are embedded in the water-absorbable plastic foam before launch. The cultivation chamber has two ports; one is for supplying water to this foam and the other is for supplying water or NaCl solution to a filter paper situated at the opposite side of the foam. Onboard, crew will connect plastic syringe and the port by tubing and supply water or NaCl solution for allowing seed germination and for controlling moisture gradient. Considering microgravity conditions, we were concerned about feasibility of these water- and salt-solution-delivery systems. We therefore conducted parabolic-flight-experiments to test these systems under altered gravity conditions. Under microgravity conditions, we injected 9.5 mL of water to the foam by using this system, and its absorption pattern was recorded by video camera and compared it with the result on the ground. The results showed that on the ground the injected solution tended to accumulate on the bottom flank of the foam and took longer than 90 seconds to be fully distributed into the foam. Under microgravity conditions, on the contrary, the solution rapidly distributed, and it took just 15 seconds to complete injection. These results allow us to properly calculate crew time required for onboard operation and to validate the systems to supply solutions into the chamber in space., 共催: 日本学術会議, joint hosting: The Science Council of Japan, 資料番号: AA0064730066},
 publisher = {宇宙航空研究開発機構宇宙科学研究本部, Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA)},
 title = {「Hydro Tropi」宇宙実験へ向けた給水システムのパラボリックフライトによる検証},
 volume = {26},
 year = {2010}
}