Process for preparing sterile solid propellants Patent
Using ethylene oxide in preparation of sterilized solid rocket propellants and encapsulating materials
Montgomery, L. C.↗
SEARCH · Engineering Papers
Results for “sterilization”
Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
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Planning, evaluation, and analytical studies in planetary quarantine and spacecraft sterilization Quarterly progress report, period ending 30 Sep. 1970
Planetary quarantine and spacecraft sterilization studies, with information systems development and mathematical models
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Quality assurance requirements manual for planetary spacecraft to be sterilized by heating
Information and guidelines on quality assurance requirements for production, assembly, and checkout of spacecraft to be sterilized by heating
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Clean assembly and sterilization laboratory Final report
Research and development of sterilization and clean room procedures for spacecraft assembly and planetary quarantine
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Long-term numerical recording of very small oxygen consumptions under sterile conditions
Coulometric microrespirometer for long term numerical recording of oxygen consumption in respiratory chamber under sterile conditions
Heusner, A. A.↗
Microbial sterilization in ultra-high vacuum and outer space - A kinetic comparison
Reaction kinetics of microbial sterilization in ultrahigh vacuum and in outer space
Brannen, J. P.↗
Biological Monitoring of the Capsule Mechanical Training Model During Assembly in the Sterilization Assembly Development Laboratory
Microbial burden sterilization assembly procedure development using rigorous monitoring program
Redmann, G. H.↗
Sterilization compatibility of growth media for extraterrestrial use
Dry heat spacecraft sterilization-compatibility tests of reagents and growth media for planetary biological exploration
Gelvin, D. E.↗
Methyl bromide as an aid to ethylene oxide sterilization
Ethylene oxide and methyl bromide sporicidal activity compared for spacecraft sterilization of B. subtilis var niger spores
Hoffman, R. K.↗
Mechanical sterilization of the applanation tonometer. II
Mechanical sterilization and cleansing of Goldmann applanation tonometer prisms contaminated with coliphage, comparing with germicidal immersion
Corboy, J. M.↗
Sterile chamber operation with bio-isolator suit system
Development and characteristics of protective suit to permit man to operate in biologically sterile environment are described. Construction of tunnel, flexible seals, and cooling system are analyzed. Illustration of isolation suit is provided.
Hueschen, R. M.↗
Planning, evaluation and analytical studies in planetary quarantine and spacecraft sterilization
The technical and analytical support used to aid in developing requirements for planetary quarantine are presented. The investigation was divided into 8 work tasks which are presented in tabular form. Data include methods of sterilization, safety margins for quarantine, revision of contamination logs for Mars and Venus, and estimates of encapsulated and 'free' microbial burden.
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A stochastic bioburden model for spacecraft sterilization.
Development of a stochastic model of the probability distribution for the random variable representing the number of microorganisms on a surface as a function of time. The first basic principle associated with bioburden estimation is that viable particles are removed from surfaces. The second notion important to the analysis is that microorganisms in environments and on surfaces occur in clumps. The last basic principle relating to bioburden modeling is that viable particles are deposited on a surface. The bioburden on a spacecraft is determined by the amount and kind of control exercised on the spacecraft assembly location, the shedding characteristics of the individuals in the vicinity of the spacecraft, its orientation, the geographical location in which the assembly takes place, and the steps in the assembly procedure. The model presented has many of the features which are desirable for its use in the spacecraft sterilization programs currently being planned by NASA.
Roark, A. L.↗
Heat-sterilized silver oxide-zinc cells: Cycle life studies
A JPL study was conducted to evaluate the cell design parameters that contribute to the cycle life of sealed, heat-sterilized silver oxide-zinc cells. Test cells having a rated capacity of 4.2 A-h were fabricated using zinc oxide electrodes prepared by the sintered Teflon process. Two separator variations were evaluated, one having acrylic acid and the other methacrylic acid grafted to irradiated polyethylene film. Significant results of this study include the following: (1) cycle life in excess of 300 cycles was attained; (2) a zinc oxide/silver stoichiometric ratio of 1.5 resulted in greater cycle life than a ratio of 1.1, and similar cycle life to cells having a ratio of 2; (3) cells having methacrylic acid grafted separators suffered somewhat less in capacity loss due to zinc electrode shape change than cells having acrylic acid type; (4) use of acrylic acid grafted separators was slightly superior to the methacrylic acid type in respect to silver penetration; and (5) the inclusion of a layer of potassium titanate paper adjacent to the zinc electrodes resulted in cells that achieved higher cycle life before any of the group failed than that reached by cells of any other construction.
Arms, J. T.↗
Protein sterilization method of firefly luciferase using reduced pressure and molecular sieves
The sterilization of the protein fruitfly luciferase under conditions that prevent denaturation is examined. Denaturation is prevented by heating the protein in contact with molecular seives and under a reduced pressure of the order of 0.00005 millimeters of mercury.
Chappelle, E. W.↗
The effect of sterilization on biological, organic geochemical and morphological information in natural samples
The loss of biological, organic geochemical, and morphological science information that may occur should a Mars surface sample be sterilized prior to return to earth is examined. Results of experimental studies are summarized.
Hochstein, L. I.↗
Study of the desorption of ethylene oxide fixed on various materials during sterilization by a new procedure
A continuous sterilization process using ethylene oxide was studied in comparison with a classical method in order to evaluate gas retention as a function of time and temperature on polyethylene, PVC, and rubber materials.
Lacomme, M.↗
Advances in Sterilization and Decontamination: a Survey
Recent technical advances made in the field of sterilization and decontamination and their applicability to private and commercial interests are discussed. Government-sponsored programs by NASA produced the bulk of material presented in this survey. The summary of past and current research discussed is detailed to enhance an effective transfer of technology from NASA to potential users.
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