| Life Support Concepts for Space Travel II Raymond M. Wheeler Biological Sciences Branch Kennedy Space Center, FL |
| Plants and Bioregenerative Life Support |
| Slide 3 |
| Testing with Plants and Algae for Life Support |
| NASA Testing with Plants for Life Support |
| Plants and Life Support: Some Background |
| Early Studies Focused on
Algae and Cyanobacteria (1950s and 1960s) |
| Observations from Algae Studies: |
| Slide 9 |
| Bioregenerative Life Support for Space: |
| Testing with Higher
Plants and the CELSS Program |
| Considerations for Selecting Crops |
| Some Crops for Life Support |
| Some Findings from NASA
Testing ¨ Recirculating Hydroponics with Agronomic Crops: |
| Lettuce in Recirculating Hydroponics |
| Essential Elements for Plants and Humans |
| Porous Tube Watering System for Plants in Microgravity |
| Some Findings from NASA
Testing ¨ High Yields from High Light and CO2 Enrichment : |
| Effect of Light on Crop
Yield (Data from NASA Biomass Production Chamber) |
| Effect of Light on Photosynthesis |
| Slide 21 |
| Some Findings from NASA
Testing ¨ Closed System Studies: |
| Slide 23 |
| CO2 Effects on Photosynthesis |
| Plant Effects on CO2 and O2 Levels in a Closed System |
| Some Findings from NASA
Testing ¨ Whole Canopy Gas Exchange: |
| Some Findings from NASA
Testing ¨ Cultivar Selection and Development : |
| Continuing Challenges: |
| The Special Challenge of
Providing Light for Plants |
| Electric Lamp Considerations |
| High-Intensity Discharge Lamps for Plant Lighting |
| Plant Requirements for Blue Light |
| Slide 33 |
| Waste Recycling with Biological Systems |
| Plants for Water Purification |
| Sodium Recycling in Closed Systems |
| Biological Waste Processing Systems |
| Waste Recycling / Aquaculture |
| Constraints for Life
Support in Space: (ÒEconomicsÓ of Life Support) |