This system was created in 1964 by Beckman Instruments' Space Engineering Group for the United States Air Force's School of Aerospace Medicine. This prototype photosynthetic gas exchanger could support two adult, human test subjects in closed ecological system, while converting their exhaled carbon dioxide into oxygen via algae photosynthesis.
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Laursen, Rene. “Laboratory and Biostat Photosynthetic Gas Exchange System,” 1964. Beckman Historical Collection, Box 57, Folder 55. Science History Institute. Philadelphia. https://digital.sciencehistory.org/works/47429922r.
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