Accession Number N20120015967
Title Antimicrobial Materials for Advanced Microbial Control in Spacecraft Water Systems.
Publication Date Oct 2012
Media Count 28p
Personal Author G. Newsham J. Caro M. Birmele M. Morford M. Roberts R. Wheeler
Abstract Microbial detection, identification, and control are essential for the maintenance and preservation of spacecraft water systems. Requirements set by NASA put limitations on the energy, mass, materials, noise, cost, and crew time that can be devoted to microbial control. Efforts are being made to attain real-time detection and identification of microbial contamination in microgravity environments. Research for evaluating technologies for capability enhancement on-orbit is currently focused on the use of adenosine triphosphate (ATP) analysis for detection purposes and polymerase chain reaction (peR) for microbial identification. Additional research is being conducted on how to control for microbial contamination on a continual basis. Existing microbial control methods in spacecraft utilize iodine or ionic silver biocides, physical disinfection, and point-of-use sterilization filters. Although these methods are effective, they require re-dosing due to loss of efficacy, have low human toxicity thresholds, produce poor taste, and consume valuable mass and crew time. Thus, alternative methods for microbial control are needed. This project also explores ultraviolet light-emitting diodes (UV-LEDs), surface passivation methods for maintaining residual biocide levels, and several antimicrobial materials aimed at improving current microbial control techniques, as well as addressing other materials presently under analysis and future directions to be pursued.
Keywords Adenosine triphosphate
Antiinfectives and antibacterials
Detection
Life support systems
Light emitting diodes
Microgravity
Microorganisms
Passivity
Silver
Spacecraft contamination
Sterilization
Water pollution
Weightlessness simulation


 
Source Agency National Aeronautics and Space Administration
NTIS Subject Category 84 - Space Technology
57E - Clinical Medicine
Corporate Author National Aeronautics and Space Administration, Cocoa Beach, FL. John F. Kennedy Space Center.
Document Type Conference proceedings
Title Note N/A
NTIS Issue Number 1314
Contract Number NNK11EA08C

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