 |
||||||||||
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
|
 |
|
|
|
|
|
|
|
|
|
|
23 -- Laboratory Analogue Environments for Studying Geochemical and Biological Processes on Planetary Surfaces
TWO ORAL SESSIONS
WEDNESDAY, April 16, 2008: AFTERNOON
Laboratory Analogue Environments for Studying Geochemical and Biological Processes on Planetary Surfaces: Atmospheric Processes on Mars and Titan
THURSDAY, April 17, 2008: MORNING
Laboratory Analogue Environments for Studying Geochemical and Biological Processes on Planetary Surfaces: Fate of Microbes and Molecules in Martian Regolith
Lisa Pratt
Indiana University
Bloomington, IN, USA
Andrew Schuerger
University of Florida
Kennedy Space Center, FL, USA
Melissa Trainer
University of Colorado
Boulder, CO, USA
Tullis Onstott
Princeton University
Princeton, NJ USA
Inge ten Kate
NASA Goddard Space Flight Center
Greenbelt, MD, USA
Description
Determining the prevalence and constitution of life forms in extraterrestrial environments is a fundamental challenge for astrobiology. Potentially habitable environments are anticipated under physical and chemical conditions with no natural analogues on Earth. Consequently, researchers around the world are conducting experiments under simulated environmental conditions for the purpose of identifying processes that could influence the fate of prebiotic molecules, biomarkers, and microorganisms on planetary bodies. Technical hurdles for this type of laboratory work necessitate innovations in equipment and instrumentation that unite this research community regardless of the particular planetary system under study. Experimental apparatuses are in the design, construction, or utilization phase for several planets and icy moons found within our Solar System. A specific focus area for this session will be work incorporating hypobaric chambers with UV and other types of ionizing radiation as analogues for processing occurring at or near the surface of Mars. Results from Mars-simulation experiments will provide data on interactions between minerals, aqueous species, gases and microorganisms. Integrated data sets will provide a rational basis for revising planetary protection procedures, for discriminating between space-craft contamination and indigenous biological signatures in samples collected on the Martian surface, and for identifying physiologies that could adapt to harsh surface environments. These experiments also provide crucial tests of sensitivity and reliability for instrumentation anticipated on current and future planetary missions. This session will bring together investigators with a common focus for discussion of laboratory protocols, chamber designs, instrument configurations, and experimental results with astrobiological implications.
ORAL SESSIONS
WEDNESDAY, April 16, 2008: AFTERNOON
Laboratory Analogue Environments for Studying Geochemical and Biological Processes on Planetary Surfaces: Atmospheric Processes on Mars and Titan
3:15 23-18-O. Laboratory Investigations on Discharge in the Martian Atmosphere
I. ten Kate, P. Mahaffy
3:35 23-19-O. Martian Ice Analogues as Possible CH4 Sources and Sinks
M. Trainer, C.P. McKay, M.A. Tolbert, O.B. Toon
3:55 23-06-O. Laboratory Studies of Water Ice Cloud Formation on Mars and Feedback
on Surface Water Availability L. Iraci, B. Phebus, B.M. Stone, A. Colaprete
4:10 23-14-O. Laboratory Measurements of Adsorbed Water on Dust under Martian
Atmospheric Conditions B. Phebus, L.T. Iraci, B.M. Stone, A. Colaprete
4:25 23-05-O. EUV-VUV Photochemistry in the Upper Atmospheres of Titan and the
Early Earth H. Imanaka, P. Douglas Archer, Jr., Emma L. O. Bakes, Mark A. Smith
4:40 BREAK
4:55 23-12-O. Hydrolysis of Laboratory Made Tholins in Solutions of Varying pH:
Implications for Prebiotic Chemistry on Titan C. Neish, Á. Somogyi, J. Lunine, M.Smith
5:10 23-04-O. Optical Properties of Titan and Early Earth Haze Analogs
C. Hasenkopf, M.R. Beaver, H.L. Dewitt, M.A. Tolbert, O.B. Toon, C. McKay
THURSDAY, April 17, 2008: MORNING
Laboratory Analogue Environments for Studying Geochemical and Biological Processes on Planetary Surfaces: Fate of Microbes and Molecules in Martian Regolith rs:r. Schuerger,
eOsn Kate
9:45 23-16-O. Creating Accurate Mars Surface Simulations: A Case Study
A.C. Schuerger
10:05 23-21-O. Effect of Shadowing on the Survival of Bacteria to Conditions
Simulating Martian Atmosphere and UV-Radiation [invited] K. Venkateswaran,
S. Osman, M.T. La Duc, Z. Peeters, P. Ehrenfreund, R. Mancinelli
10:25 23-09-O. Survival of Methanogens Following Desiccation at 6 mbar
T. Kral, T.S. Altheide
10:40 23-20-O. Laboratory Studying of Metabolic Activity of Terrestrial Bacteria in Subsurface Martian Environments M. Vdovina, A.K. Pavlov, V.N. Shelegedin,
V. T. Kogan, A.V. Tretyakov
10:55 BREAK
11:10 23-17-O. Survivability of Psychrobacter Cryohalolentis K5 in
Simulated
Martian
Surface Conditions
D.J. Smith, A.C. Schuerger, M.M. Davidson, S.W. Pacala, C. Bakermans, T.C. Onstott
11:30 23-13-O. The Stability of Amino Acids in Mars Regolith Analogues Z. Peeters,
R. Quinn, Z. Martins, L. Becker, J. Brucato, P. Willis, F. Grunthaner, P. Ehrenfreund
11:45 23-08-O. Environmental Protection: The Role of Brine Environments in the
Radiation Resistance of Microorganisms A. Kish, C. Robinson, R. Rosenblatt;
M. Dizdaroglu, J. DiRuggiero
POSTERS
23-01-P. The Effect of Short Wavelength UV Radiation on Uracil Thin Layer: An Application
of the "Mars Lamp" A. Bérces, M. Egyeki, H. Lammer, G. Kovács, C. Kolb, G. Rontó
23-02-P. Electrochemical Controls on Stable Isotope Fractionation J. Black, A. Kavner
23-03-P. Mineralogical Biosignatures: A Laboratory Model for Subsurface Sulfur and Iron
Respiring Martian Life J. Denson, M. Ivey
23-07-P. Redox-driven Stable Isotope Fractionation in Transition Metals: Application to Zn
Electroplating A. Kavner, S. John, S. Sass, E. Boyle
23-10-P. Binding Energies of Methane and Water-ice Systems R. Mastrapa, T. Cadarette,
S. Sandford
23-11-P. The NASA Ames Infrared Spectroscopic Database of Polycyclic Aromatic
Hydrocarbons A. Mattioda, L.J. Allamandola, C.W. Bauschlicher, D.M. Hudgins, A. Ricca,
J. Cami
23-15-P. Planetary and Space Simulation Facilities PSI at DLR for Astrobiology
E. Rabbow, P. Rettberg, G. Reitz, C. Panitz