HCG36-01

Room:101B

Time:May 24 14:18-14:33

Utilization of a terrestrial cyanobacterium, Nostoc sp. HK-01, in closed bio-ecosystems
KIMURA, Shunta1∗ ; KIMURA, Yasuko2 ; KATOH, Hiroshi3 ; ARAI, Mayumi4 ; SATO, Seigo1 ;TOMITA-YOKOTANI, Kaori1
1

University of Tsukuba, 2 University of Tsukuba and Jumonji University, 3 Mie University, 4 National Museum of Emerging Science and Innovation
Cyanobacteria has been used as a traditional food resource in many parts of the world. Food production under severe conditions is important for life-support in closed bio-ecosystems.
A terrestrial cyanobacterium, Nostoc sp. HK-01 may be utilized for bio-chemical circulation in closed bio-ecosystems, including Mars. Nostoc sp. HK-01, has several ability; photosynthesis, nitrogen fixation and space environmental tolerance todrought, vacuum, heat, UV, gamma-ray and heavy particle beams. We propose the utilization of a terrestrial cyanobacterium,
Nostoc sp. HK-01, as food in closed bio-ecosystems.
In this study, we verified the utilization of terrestrial cyanobacterium Nostoc sp. HK-01 as a food resource on Mars, and willdiscuss technology for recycling this strain as a food resource in a closed bio-ecosystem.

Keywords: closed bio-ecosystems, cyanobacteria, food resources, Nostoc sp. HK-01

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HCG36-02

Room:101B

Time:May 24 14:33-14:48

Current Status on CELSS for Human Space Activities - An Introduction of ECLSS on
board ISS OHNISHI, Mitsuru1∗
1Japan Aerospace Exploration Agency

It is called ECLSS (Environmental Control and Life Support System) that provides suitable environment for human space
activities. The smallest ECLSS is a space suit. On the other hand, ISS (International Space Station) has one of the largest ECLSS
for long term stay. It looks like a very complicated chemical plant composed of several functions. Still, this ECLSS is a subset
of fully CELSS (Controlled Ecological Life Support System). CELSS consists of air revitalization, food production, thermal
control, waste disposal, and water recovery functions. The most important and difficult function is the food production. Current
ECLSS on board ISS racks this. However we can’t have achieved this CELSS even on the ground yet. Anyway this ECLSS cankeep the environment inside ISS comfortable, provide material requirement from human body, and process exhausting material
from that. Let’s introduce the ECLSS on board ISS as a step to the fully CELSS.

Keywords: CELSS, ECLSS

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HCG36-03

Room:101B

Time:May 24 14:48-15:03

Utilization of the terrestrial cyanobacteria
KATOH, Hiroshi1∗ ; KIMURA, Shunta2 ; YOKOSHIMA, Mika2 ; FURUKAWA, Jun2 ; TOMITA-YOKOTANI, Kaori2
1

Mie University, 2 University of Tsukuba

The terrestrial, N2 -fixing cyanobacterium, Nostoc commune has expected to utilize for agriculture, food and terraforming
cause of its extracellular polysaccharide, desiccation tolerance and nitrogen fixation. For isolation, many of bacteria, fungi,algae and cyanobacteria were obtained from natural Nostoc commune crusts. It may be suggesting that Nostoc commune has
potential of ”Cradle of Life”. In this report, we suggest possibility of agriculture, using the cyanobacterium. Further, wealso found radioactive compounds accumulated Nostoc commune (cyanobacterium) in Fukushima, Japan after nuclear accident.
Thus, it is investigated to remove radioactive compounds from soil by the cyanobacterium and showed to accumulate radioactive
compounds using the cyanobacterium. We will discuss utilization of terrestrial cyanobacteria under closed environment.
Keywords: desiccation, terrestrial cyanobacteria, bioremediation, agriculture, space agriculture

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HCG36-04

Room:101B

Time:May 24 15:03-15:18

Evaluation of nutritional utilization of Nostoc sp. HK-01, as a food resource in closed
bio-ecosystems
KIMURA, Yasuko1∗ ; KIMURA, Shunta2 ; KATOH, Hiroshi3 ; ARAI, Mayumi4 ; SATO, Seigo2 ;TOMITA-YOKOTANI, Kaori2
1

University of Tsukuba and Jumonji University, 2 University of Tsukuba, 3 Mie University, 4 National Museum of Emerging
Science and Innovation
We study life-support in closed bio-ecosystems to provide food and oxygen for habitation in severe environments. We propose
several species of organisms as candidate species. A terrestrial cyanobacterium, Nostoc sp. HK-01 has several unique abilities,photosynthesis, nitrogen fixation and tolerance to a space environment. Here, we propose to utilize Nostoc sp. HK-01 as a foodresource in space environments such as Mars. Nostoc sp. HK-01 appears to have high nutritional values for humans. We willdiscuss the nutritional utilization of Nostoc sp. HK-01 in closed bio-ecosystems. Our results may contribute to the supply offood resources under severe conditions for life-support in closed bio-ecosystems.
Keywords: closed bio-ecosystems, cyanobacteria, food resource, Nostoc sp.HK-01, nutritional utilization

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HCG36-05

Room:101B

Time:May 24 15:18-15:33

Possibility of tree utilization in closed bio-ecosystems - Proposal research in model tree
Prunus sp.
TOMITA-YOKOTANI, Kaori1∗ ; BABA, Kei’ichi2 ; KATOH, Hiroshi3 ; SUZUKI, Toshisada4 ;KATAYAMA, Takeshi4 ; COSMO, Bon1
1University of Tsukuba, 2 Kyoto University, 3 Mie University, 4 kagawa University

Living creatures on the earth have evolved since their origin. They are equipped with several important functions affecting
each other. Knowledge about these functions and interactions with the ecological factors is essential for secure design of aclosed-ecosystem with a limited number of living species under severe environments, such as space and deep sea or desert. We
have studied trees for using their materials in such environment. There are various utilizations of trees on the earth. Trees havenumerous abilities such as materials for several tools in a closed bio-ecosystem. Japanese flowering cherry trees, Prunus sp.,
have been studied as one woody plants in our research group. We carry out experiments to show actual usage in a closed bioecosystem by using a small bonsai, CosmoBon, that is easy to use physiological experiments after the selection of suitable andperfect strains of the tree. We will discuss the biological and technical systems for the establishment of closed systems.
Keywords: Closed bio-ecosystem, CosmoBon, Space experiment, Severe environment, Tree utilization

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