Technical Research on ISS Russian Segment
Experiment Toksichnost
As the expeditions to the manned complexes are increasingly scheduled for a longer period, the task to monitor permanently cosmonauts' habitable environment, primarily water, becomes urgent. On-line monitoring conducted by facilities being simple in operation is required. The test systems based upon biosensors, among which bioluminescent sensors are of special interest, meet such requirements. Relatively simple measuring instruments with electric output signal were developed on their basis. These measuring instruments together with the developed methods of biosensor conservation for long periods of time allow to execute on-line monitoring of toxicity of the solutions and water on the orbital station.
Objective:
- Verification of the characteristics of environmental monitoring of instrument Biotoks-10K intended for an integrated assessment of toxicity of the solutions and water with no conserving agents under microgravity conditions by means of measuring variation in luminescence intensity of microbial biosensor Ekolum during its interaction with the substances contained by a sample under test as compared with a standard measuring instrument and by comparing the findings with similar results produced under ground conditions.
- Development of the recommendations for nominal use of this device (or certification of this instrument as a nominal one) for on-line determination of the water integrated toxicity on the ISS RS.
Tasks:
- Identifying toxicity of water samples through measuring variation in luminescence intensity of microbial biosensor Ekolum during its interaction with the substances contained in a sample under test as compared with a standard measuring instrument.
- Modifying this instrument to be used under space flight conditions as a nominal equipment for on-line integrated assessment of toxicity of the ISS RS solutions and water.
Science Hardware Used:
Flight Equipment Used:
Consumables:
- Stowage of accessories and consumables Biotoks-10K.
Objects of study are samples of the water recovered from atmospheric water condensate after the ISS RS purification units prior to conserving agent Ag+ being introduced, as well as water samples delivered from the ground.
Expected Results:
- Development testing of the procedure for on-line integrated assessment of the ISS RS water toxicity.
- Development of nominal onboard system of water toxicity express monitoring on the ISS RS.
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