There are 122 publication entries for the NASA Ames Research Center   Albert, D.B., Hoehler, T., Bebout, B. & Des Marais, D.J.  (Submitted, 2006).  Diel Organic Acid Fluxes from Hypersaline Microbial Mats.  Applied and Environmental Microbiology. Beaty, D.W., Clifford, S.M., Borg, L.E., Catling, D., Craddock, R.A., Des Marais, D.J., Farmer, J.D., Frey, H.V., Haberle, R.M., McKay, C.P., Newsom, H.E., Parker, T.J., Segura, T. & Tanaka, K.L.  (2005).  Key Science Questions from the Second Conference on Early Mars: Geologic, Hydrologic, and Climatic Evolution and the Implications for Life.  Astrobiology, 5(6):663-689. Bernstein, M.P., Cruikshank, D.P. & Sandford, S.A.  (2005).  Near-Infrared Laboratory Spectra of Solid H2O/CO2 and CH3OH/CO2 Ice Mixtures.  Icarus, 179. Bernstein, M.P., Cruikshank, D.P. & Sandford, S.A.  (2006).  Near-Infrared Laboratory Spectra of Laboratory H2O-CH4 Ice Mixtures.  Icarus, 181. Bernstein, M.P., Mattioda, A.L., Sandford, S.A. & Hudgins, D.M.  (2005).  Laboratory Infrared Spectra of Polycyclic Aromatic Nitrogen Heterocycles: Quinoline and Phenanthridine in Solid Argon and H2O.  Astrophys. J., 626. Bernstein, M.P., Sandford, S.A. & Allamandola, L.J.  (2005).  The Mid-Infrared Absorption Spectra of Neutral Polycyclic Aromatic Hydrocarbons in Conditions Relevant to Dense Interstellar Clouds.  Astrophys. J. Suppl. Ser., 161. Bernstein, M.P., Sandford, S.A. & Walker, R.L.  (2005).  Laboratory IR Spectra of 4-Azachrysene in Solid H2O.  Adv. Space Research, 36. Bishop, J.L., Louris, S.K. & Rothschild, L.J.  (In Press, 2006).  Iron Oxide: An Early Sunscreen for Photosynthetic Microbes?.  International Journal of Astrobiology. Bishop, J.L., Rothschild, L.J. & Rogoff, D.A.  (2006).  Nanophase Iron Oxides as an Ultraviolet Sunscreen for Ancient Photosynthetic Microbes: A Possible Link Between Early Organisms, Banded-Iron Formations, and the Oxygenation of the Atmosphere [Abstract]: Astrobiology. Bradley, A.S., Grover, H., Sylva, S., Londry, K., Hayes, J.M. & Summons, R.  (2005).  Compound-specific isotope analysis of hydroxyarchaeols at the Lost City hydrothermal field and in cultured methanogenic Archaea [Abstract].  22 IMOG Seville, Spain. Bradley, A.S., Hayes, J.M. & Summons, R.E.  (2005).  Diethers enriched in 13C suggest carbon-limitation at the Lost City Hydrothermal Field. [Abstract].  NASA Exobiology PI Workshop. Bradley, A.S., Love, G.D., Brocks, J.J., Sievert, S.M. & Summons, R.E.  (2005).  Branched Alkanes with Quaternary Carbon Centers (BAQCs): Biomarkers for Ancient Microbes or Recent Microbial Activity? [Abstract].  Eos Trans. AGU, 86:52. Bradley, A.S., Shock, E., Meyer-Dombard, D. & Summons, R.E.  (2005).  Branched alkanes with quataernary carbon centers in a sulfidic Yellowstone mudpot. [Abstract]. NASA Astrobiology Institute Biennial Meeting. Bradley, J., Dai, Z.R., Erni, R., Browning, N., Graham, G., Weber, P., Smith, J., Hutcheon, I., Ishii, H., Bajt, S., Floss, C., Stadermann, F. & Sandford, S.  (2005).  The Astronomical 2175 Å Feature in Interplanetary Dust Particles.  Science, 307:244-247. Brownlee, D.E., Flynn, G., Hörz, F., Keller, L., McKeegan, K., Sandford, S., Tsou, P. & Zolensky, M.E.  (2006).  Comet Samples Returned by the Stardust Mission [Abstract].  Lunar and Planetary Science, XXXVII. Burry, L., Trivi, M. & D'Antoni, H.  (2006).  Paleocomunidades Vegetales en el Centro de la Isla Grande de Tierra del Fuego. [Abstract & Poster].  XIII Simposio Argentino de Paleobotánica y Palinología, May 22-25, 2006 (Bahia Blanca). Burry, L.S., D'Antoni, H.L. & Frangi, J.L.  (2005).  Polen y Vegetación en la Patagonia Extraandina Argentina a 45°S.  Anales del Jardín Botánico de Madrid, 62:2. Casillas-Martinez, L., Gonzalez, M.L., Fuentes, Z., Nieves, D., Hernandez, C., Ramirez, W., Sytsma, R.E., Perez-Jimenez, J. & Visscher, P.T.  (2005).  Community structure, geochemical characteristics and mineralogy of a hypersaline microbial mat, Cabo Rojo, PR.  Geomicrobiological Journal, 22. Cho, G.S. & Szostak, J.W.  (2006).  Directed evolution of new Zinc-finger ATP-binding proteins using mRNA display.  Chem. & Biol., 13:139-147. Cruikshank, D.P., Owen, T.C., Dalle Ore, C., Geballe, T.R., Roush, T.L., de Bergh, C., Sandford, S.A., Poulet, F., Benedix, G.K. & Emery, J.P.  (2005).  A Spectroscopic Study of the Surfaces of Saturn's Large Satellites: H2O Ice, Tholins, and Minor Constituents.  Icarus, 175. D'Antoni, H.L. & Skiles, J.W.  (2005).  Hindcasting Ecosystems: Exploring Links Between Astrobiology and Herat Science. [Abstract # 777].  Astrobiology, 5:2. D'Antoni, H.L.  (2005).  Astrobiología, el Origen de la Vida y el Cambio Global. [Abstract].  2 Jornadas Bioquímicas del Sudeste Bonaerense. D'Antoni, H.L.  (2005).  Astrobiología, el origen de la vida y el cambio global. [Front cover of the issue with Astrobiology illustration].  Acta Bioquím. Latinoam, 39:3. D'Antoni, H.L.  (2005).  Astrobiología, el Origen de la Vida y el Cambio Global: La Salud Pública.  [Abstract].  Parasitología Latinoamericana, 60:1. D'Antoni, H.L., Skiles, J.W., Mendonça, J.A. & Schultz, C.  (2006).  From Earth Science to Astrobiology [Abstract # 269].  Astrobiology, 6(1):135. Davis, S.  (2005).  Condensation Front Migration in the Protoplanetary Nebula.  ApJ, 620. Davis, S.  (2005).  Ice Forming Regions during Evolution of the Solar Nebula [Abstract].  Astrobiology, 5:2. Davis, S.  (2005).  The Minimum Mass Surface Density of the Solar Nebula using the Disk Evolution Equation [Abstract].  AAS Bulletin, 37:3. Davis, S.  (2005).  The Surface Density Distribution in the Solar Nebula.  ApJ, 627. Davis, S.  (2006).  Following the Water: the Evolution of Ice-forming Regions in the Early Solar Nebula [Abstract].  Astrobiology, 6:1. Decker, K.L.M. & Potter, C.S.  (2006).  A Modeling Investigation of Salinity Effects on Microbial Mat Ecology and Biogeochemistry [Abstract].  Astrobiology, 6(1):257. Decker, K.L.M., Potter, C.S. & Hoehler, T.M.  (2005).  A Modeling Comparison of Methanogenesis from Noncompetitive vs Competitive Substrates in a Simulated Hypersaline Microbial Mat [Abstract].  Eos Trans. AGU Fall Meeting Supplement, 86:52. Decker, K.L.M., Potter, C.S., Bebout, B.M., Des Marais, D.J., Carpenter, S., Discipulo, M., Hoehler, T.M., Miller, S.R., Thamdrup, B., Turk, K.M. & Visscher, P.T.  (2005).  Mathematical simulation of the diel O, S, and C biogeochemistry of a hypersaline mat.  FEMS Microbiology Ecology, 52. Decker, K.M., Potter, C. & Hoehler, T.M.  (2005).  A modeling comparison of methanogenesis from noncompetitive vs competitive substrates in a simulated hypersaline microbial mat [Abstract]. 2005 American Geophysical Union Meeting. Des Marais, D.J. & Athena-Science-Team, D.J.  (2005).  Astrobiology and the exploration of Gusev Crater by the Mars Exploration Rover Spirit [Abstract].  International Society for the Study of the Origins of Life, Beijing, China, 19-24 June 2005. Des Marais, D.J.  (2005).  Sea change in sediments.  Nature, 437(7060):826-827. Des Marais, D.J.  (2006).  Moving forward from Viking, Spirit, and Opportunity [Abstract #518].  AbSciCon 2006, Washington, DC.  Astrobiology, 6(1):168. Des Marais, D.J., Londry, K., Orphan, V., Turk, K., Bebout, B., Carpenter, S., Embaye, T., Hoehler, T.M., Jahnke, L. & Kubo, M.  (2005).  Carbon biogeochemistry in sulfate-rich environments [Abstract].  Exobiology Principal Investigators' Conference, NASA Ames Research Center, August 2005. Dominik, C., Ceccarelli, C., Hollenbach, D. & Kaufman, M.  (2005).  Gas-Phase Water in the Surface Layer of Protoplanetary Disks.  Astrophysical Journal Letters, 635. Dubrulle, B., Dauchot, O., Daviaud, F., Longaretti, P.Y., Richard, D. & Zahn, J.P.  (2005).  Stability and turbulent transport in Taylor-Couette flow from analysis of experimental data.  Physics of Fluid, 17:9. Dubrulle, B., Marie, L., Normand, C., Richard, D., Hersant, F. & Zahn, J.P.  (2005).  An hydrodynamic shear instability in stratified disks.  Astronomy and Astrophysics, 429:1. Dullemond, C., Hollenbach, D., Kamp, I. & D'Alessio, P.  (In Press, 2006).  Models of the Structure and Evolution of Protoplanetary Disks [invited review chapter].  In: B. Reipurth, D. Jewitt & K. Keil (Eds.).  Protostars and Planets V (pp. 1-18).  University of Arizona Press. Dupraz, C. & Visscher, P.T.  (2005).  Microbial lithification in modern marine stromatolites and hypersaline mats.  Trends in Microbiology, 13:9. Dyar, M.D., Treiman, A.H., Pieters, C.M., Hiroi, T., Lane, M.D. & O’Connor, V.  (2005).  MIL03346, the most oxidized Martian meteorite: A first look at petrography, mineral chemistry, and spectroscopy.  J. Geophys. Res., 110. Elsila, J.E., Hammond, M.R., Bernstein, M.P., Sandford, S.A. & Zare, R.N.  (2006).  UV Photolysis of Quinoline in Interstellar Ice Analogs.  Meteoritics and Planetary Science, 41. Finke, N., Hoehler, T.M. & Jørgensen, B.B.  (Submitted, 2006).  Anaerobic carbon degradation pathways in aquatic sediments controlled by H2 leakage in methanogens.  Applied and Environmental Microbiology. Fischer, D. & Laughlin, G.  (2006).  The N2K Consortium III. Short-Period Planets Orbiting HD 149143 and HD 109749.  Astrophysical Journal, 637:1. Foster, J.S., Rothschild, L.J. & Sherman, L.  (2006).  Differential gene expression during the transition from exponential to stationary phase in the cyanobacterium Synechocystis sp. Strain PCC 6803. [Abstract].  Astrobiology, 6(1):111. Freund, F.T., Freund, M.M. & Rothschild, L.J.  (2006).  A non-biological process leading to planetary oxidation. [Abstract].  Astrobiology, 6(1):201. Gallagher, K., Przekop, K.M., Baumgartner, L.K., Carson, E., Blackshear, A., Dupraz, C., Braissant, O., Decho, A.W., Vasconcelos, C., McKenzie, J.A. & Visscher, P.T.  (2006).  Lithification in microbial mats: The role of the sulfur cycle.  Astrobiology, 6:1. Golden, D.C., Ming, D.W., Lauer, H.V.J., Morris, R.V., Treiman, A.H. & McKay, G.A.  (2006).  Formation of "chemically pure" magnetite from Mg-Fe-carbonates: Implications for the exclusively inorganic origin of magnetite and sulfides in Martian meteorite ALH84001. [Abstract].  Lunar Planet. Sci., 37. Green, S.J., Smith, J.M., Hogan, M., Jahnke, L.L., Kelley, C.A., Bebout, B.M. & Prufert-Bebout, L.  (2006).  Effect of salinity and sulfate manipulations on the community composition and structure of sulfate-reducing prokaryotes in a hypersaline microbial mat [Abstract].  Abstracts American Society for Microbiology Annual Meeting. Orlando, FL., 106. Green, S.J., Smith, J.M., Hogan, M., Jahnke, L.L., Kelley, C.A., Bebout, B.M. & Prufert-Bebout, L.  (2006).  Effect of sulfate manipulations on carbon cycling and microbial community structure in hypersaline microbial mats [Abstract]. American Chemical Society Annual Meeting, Atlanta, GA. Gudipati, M.S. & Allamandola, L.J.  (2006).  Unusual Stability of Polycyclic Aromatic Hydrocarbon Radical Cations in Amorphous Water Ices up to 120 K- Astronomical Implications.  Astrophysical Journal, 638. Halasinski, T., Salama, F. & Allamandola, L.J.  (2005).  Investigation of the UV, Visible, and Near-IR Absorption Spectra of Hydrogenated Polycyclic Aromatic Hydrocarbons and their Cations.  Astrophysical Journal, 628. Haskin, L.A., Wang, A., McSween, H.Y., Clark, B.C., Des Marais, D.J., McLennan, S.M., Tosca, N.J., Hurowitz, J.A., Jolliff, B.L., Farmer, J.D., Yen, A., Squyres, S.W., Arvidson, R.E., Klingelhöfer, G., Schröder, C., A., d.S.J.P., D., M.R., Ming, D., Gellert, R., Zipfel, J., Brückner, J., Bell III, J.F., Herkenhoff, K., Christensen, P.R., Ruff, S., Blaney, D., Gorevan, S., Cabrol, N.A., Crumpler, L., Grant, J. & Soderblom, L.  (2005).  Water alteration of rocks and soils from the Spirit rover site, Gusev Crater, Mars.  Nature, 436(7047):66-69. Heldmann, J.L., Pollard, W.H., McKay, C.P., Andersen, D.T. & Toon, O.B.  (2005).  Annual development cycle of an icing deposit and associated perennial spring activity on Axel Heiberg Island, Canadian High Arctic.  Arct. Antarct. Alpine Res., 37:1. Heldmann, J.L., Toon, O.B., Pollard, W., Mellon, M., Pitlick, J., McKay, C.P. & Andersen, D.T.  (2005).  Formation of Martian gullies by the flow of liquid water flowing under current Martian environmental conditions.  J. Geophys. Res., 110. Hoehler, T.M.  (2005).  A "Follow the Energy" approach for astrobiology [Abstract]. Microbial Systems Exploration Initiative Meeting. Hoehler, T.M.  (2005).  Energetic consequences of physical and chemical gradients [Abstract]. First International Symposium on Biogeochemical Gradients. Hoehler, T.M.  (2006).  Modeling microbiological interactions with hydrothermal flow [Abstract]. 2006 Ridge Theoretical Institute. Hoehler, T.M., Albert, D.B. & Des Marais, D.J.  (2006).  An energy balance model to predict chemical partitioning in a photosynthetic microbial mat [Abstract]. 2006 Astrobiology Science Conference.  Astrobiology, 6(1):187. Hollenbach, D. & Gorti, U.  (In Press, 2006).  The Photoevaporation of Protoplanetary Disks by Their Central Stars [Abstract].  In: B. Reipurth, D. Jewitt & K. Keil (Eds.).  Protostars and Planets V (pp. 1).  University of Arizona Press. Hollenbach, D., Gorti, U. & t al., e.  (2005).  Formation and Evolution of Planetary Systems: Upper Limits to the Gas Mass in HD 105.  Astrophysical Journal, 631. Hollingsworth, J.L., Young, R.E., Schubert, G., Covey, C.C. & Grossman, A.S.  (2006).  A Simple-Physics Global Circulation Model for Venus: Sensitivity Assessments of Atmospheric Superrotation [Abstract].  AGU Chapman Conference on Exploring Venus as a Terrestrial Planet. Hudgins, D.M. & Allamandola, L.J.  (2006).  Steps toward Identifying PAHs: A Summary of Some Recent Results.  In: D.C. Lis, G.A. Blake & E. Herbst (Eds.).  Astrochemistry: Recent Successes and Current Challenges (pp. 443-454).  Cambridge University Press. Hudgins, D.M., Bauschlicher, J. & Allamandola, L.J.  (2005).  Variations in the Peak Position of the 6.2 μm PAH Emission Feature: A Tracer of N in the Interstellar PAH Population.  Astrophysical Journal, 632. Jahnke, L.L., Embaye, T. & Green, S.J.  (2006).  Cyanobacterial biomarker lipids in hypersaline microbial mats and environmental adaptation [Abstract].  Astrobiology, 6(1):151. Kappler, A.D., Emerson, D., Edwards, K., Amend, J., Gralnick, J., Grathwohl, P., Hoehler, T. & Straub, K.  (2005).  Microbial activity in biogeochemical gradients -- new aspects of research.  Geobiology, 3. Lashnits, E.W. & Rothschild, L.J.  (2006).  The role of nucleotide excision repair and photoreactivation repair genes in correcting UV induced DNA damage in S. cerevisiae. [Abstract].  Astrobiology, 6(1):277. Lissauer, J.J., Quintana, E.V., Adams, F.C. & Chambers, J.E.  (2006).  Terrestrial Planet Formation in Binary Star Systems [Abstract].  Special session on planets in binary star systems, American Astronomical Society Winter Meeting #207, Washington, DC., January 10, 2006, Abstract #84.04. Mansy, S.S., Zhang, J., Nilsson, M., Chou, J.J., Szostak, J.W. & Chaput, J.C.  (Submitted, 2006).  Analysis of the Evolutionary Optimization of a Non-Biological ATP Binding Protein.  J. Mol. Biol.. Mastrapa, R.M., Bernstein, M.P. & Sandford, S.A.  (2006).  Near Infrared Spectra of H2O/HCN Mixtures [Abstract].  Lunar and Planetary Science, XXXVII. Matta, J.L., Ramos, J.M., Armstrong, R.A. & D'Antoni, H.L.  (2005).  Environmental UV-A and UV-B Threshold Dose for Apoptosis and Necrosis in Human Fibroblasts.  Photochemistry and Photobiology, 81. Matta, J.L., Ramos, J.M., Armstrong, R.A. & D'Antoni, H.L.  (Submitted, 2006).  Response of Human Fibroblasts to Very Low Doses of Environmental UV Radiation.  Caribbean Journal of Dermatology and Therapeutics. Mattioda, A.L., Allamandola, L.J. & Hudgins, D.M.  (2005).  Experimental Near Infrared Spectroscopy of Polycyclic Aromatic Hydrocarbons Between 0.7 and 2.5 µm.  Astrophysical Journal, 629. Mattioda, A.L., Allamandola, L.J. & Hudgins, D.M.  (2005).  The Ultraviolet to Near-Infrared Optical Properties of PAHs: A Semi-Empirical Model.  Astrophysical Journal, 629. Mattioda, A.L., Hudgins, A.L., Bauschlicher, J. & Allamandola, L.J.  (2005).  Infrared Spectroscopy of Matrix-Isolated Polycyclic Aromatic Compounds and Their Ions.  7. Phenazine, a dual Substituted Polycyclic Aromatic Nitrogen Heterocycle.  Advances in Space Research, 36. Meyer-Dombard, D.R., Bradley, A.S., Havig, J.R., Amend, J.P., Shock, E.L. & Summons, R.E.  (2006).  Physiochemical Parameters of Streamer-forming Biofilm Communities (SBCs) in Terrestrial Hydrothermal Environment. [Abstract]. NASA Astrobiology Science Conference.  Astrobiology, 6(1):210. Musselwhite, D.S., Dalton, H.A., Kiefer, W. & Treiman, A.H.  (In Press, 2006).  Experimental petrology of the basaltic shergottite Yamato 980459: Implications for the thermal structure of the Martian mantle.  Meteor. Planet. Sci., 41. Norris, T.B. & Castenholz, R.W.  (In Press, 2006).  Endolithic photosynthetic [missing word(s) here] within ancient and recent travertine deposits in Yellowstone National Park.  FEMS Microbiol. Ecol.. Pavlov, A.A., Pavlov, A.K.., Mills, M.J., Ostryakov, V.M., I Vasilyev, G. & Toon, O.B.  (2005).  Catastrophic ozone loss during passage of the Solar system through an interstellar cloud.  Geophys. Res. Lett., 32. Pavlov, A.A., Toon, P.B., Pavlov, A.K., Bally, J. & Pollard, D.  (2005).  Passing through a giant molecular clouds-snowball glaciations produced by interstellar dust.  Geophys. Res. Lett., 32. Pieters, C.M., Hiroi, T., Dyar, M.D., Treiman, A.H., McCanta, M., Lane, M.D. & Bishop, J.L.  (2006).  Optical properties of Martian dunite NWA 2737: A record of Martian processes [Abstract].  Lunar Planet. Sci., 37. Pohorille, A. & Pratt, L.  (2006).  Water as amatrix of life [Abstract].  Astrobiology, 6:237. Pohorille, A.  (In Press, 2006).  Protocells as universal ancestors of living systems.  In: S. Rasmussen, M. Bedau, L. Chen, D. Deamer, D. Krakauer, N. Packard & P. Shuster (Eds.).  Protocells: Bridging Nonliving and Living Matter.  New York: MIT Press. Quintana, E.V. & Lissauer, J.J.  (2005).  Terrestrial Planet Formation Around Close Binary Star Systems [Abstract].  American Astronomical Society, DPS meeting #37, Cambridge, England, September, 2005, Abstract #25.03. Quintana, E.V. & Lissauer, J.J.  (Submitted, 2006).  Terrestrial Planet Formation Surrounding Close Binary Stars.  Icarus. Quintana, E.V., Lissauer, J.J., Adams, F.C., Chambers, J.E. & Duncan, M.J.  (2005).  Terrestrial Planet Formation in Binary Star Systems [Abstract].  Proceedings of the Conference: Protostars and Planets V, The Big Island, HI, October, 2005, LPI Contribution No. 1286.. Richard, D. & Davis, S.  (2005).  Chemical Evolution and Network Analysis in Protoplanetary Disks [Abstract].  AGU 2005 Fall Meeting, 1:1. Richard, D. & Davis, S.  (2006).  Chemical Evolution and Network Analysis in Protoplanetary Disks [Abstract].  Astrobiology, 6:1. Rodriguez-Gomez, D., Darve, E. & Pohorille, A.  (2006).  Computer modeling of protocellular functions: peptide insertion in membranes [Abstract].  Astrobiology, 6:244. Rothschild, L.J.  (2006).  Range of habitats for life on earth [Abstract].  Annual Meeting of the American Association for the Advancement of Science, St. Louis, February 2006.. Rothschild, L.J., Mancinelli, R.L., Landheim, R., Hock, A. & Rogoff, D.A.  (2006).  The Search for Interplanetary Pioneers: An unusual hypersaline community from Bolivia [Abstract].  Astrobiology, 6(1):226. Sandford, S.A.  (2005).  Organic Synthesis in Space.  In: M. Livio, N. Reid & W. Sparks (Eds.).  Astrophysics of Life (pp. 54-66).  Cambridge Univ. Press: Cambridge. Sandford, S.A.  (2006).  The Stardust Discovery Mission – Returning Unique Samples of Early Solar System Organics.  (Plenary talk abstract #550).  Astrobiology, 6:98. Sandford, S.A., Aleon, J., Alexander, C.M.O'D., Butterworth, A.L., Clemett, S.J., Cody, G.D., Cooper, G., Dworkin, J.P., Flynn, G.J., Gilles, M.K., Glavin, D.P., Jacobsen, C., Matrajt, G., Robert, F., Spencer, M.K., Stephan, T., Westphal, A., Wirick, S. & Zare, R.N.  (2006).  The Preliminary Examination of Organics in the Returned Stardust Samples from Comet Wild 2 [Abstract].  Lunar and Planetary Science, XXXVII. Sandford, S.A., McNamara, K. & Zolensky, M.  (2006).  The Recovery of the Stardust Sample Return Capsule [Abstract].  Lunar and Planetary Science, XXXVII. Sato, B., Fischer, D., Henry, G., Laughlin, G. & t al., e.  (2005).  The N2K Consortium II. A Transiting Hot Saturn around HD 149026 with a Large Dense Core.  Astrophysical Journal, 633:1. Seelig, B. & Szostak, J.W.  (Submitted, 2006).  Selection and Evolution of RNA Ligases from a Partially Randomized Non-Catalytic Scaffold.  Science. Summons, R.E., Bradley, A.S., Jahnke, L. & Waldbauer, J.R.  (2006).  Steroids, triterpenoids and molecular oxygen.  Philosophical Transactions of the Royal Society, 361. Summons, R.E., Bradley, A.S., Jahnke, L.L., Sherman, L.S. & Waldbauer, J.  (2006).  Steroids, Triterpenoids, and the Geologic Record of Oxygenic Photosynthesis [Abstract].  NASA Astrobiology Science Conference.  Astrobiology, 6(1):101. Summons, R.E., Jahnke, L.L., Bradley, A.S., Love, G.D., Sherman, L.S. & Waldbauer, J.R.  (2006).  Molecular Signatures for Cyanobacteria. [Abstract].  Agouron Conference on Oxygen. Summons, R.E., Meyer-Dombard, D.R., Bradley, A.S., Dibbell, A.K., Fredricks, H.F., Hinrichs, K., Jahnke, L.L., Shock, E. & Amend, J.P.  (2005).  Molecular Studies of Filamentous and Biofilm-Forming Hyperthermophilic Communities in Yellowstone National Park [Abstract].  Eos Trans. AGU, 86:52. Tang, C.M., Hoehler, T.M. & Kulik, L.  (2006).  Astrobiology exhibit design: Applying research (and researchers) in informal science education [Abstract].  NASA 2006 Astrobiology Science Conference.  Astrobiology, 6(1):163. Tian, F., Toon, O.B. & Pavlov, A.A.  (2006).  Response to comment on "A hydrogen-rich early Earth atmosphere".  Science, 311. Tian, F., Toon, O.B., Pavlov, A.A. & DeSterck, H.  (2005).  A hydrogen-rich early earth atmosphere.  Science, 308. Toon, O.B., Pavlov, A.A. & DeSterk, H.  (2005).  Transonic hydrodynamic escape of hydrogen from extrasolar planetary atmospheres.  Astrophys. J., 621:2. Toplin, J.A., Norris, T.B. & Castenholz, R.W.  (2005).  Diversity of thermo-acidophilic algae of the Cyanidiales in Yellowstone National Park. [Abstract].  Thermophiles 2005: from evolution to revolution. 8th International Conference on Thermophiles Research, Griffith University, Australia. Treiman, A.H., Musselwhite, D.S., Herd, C.D.K. & Shearer, C.K.J.  (In Press, 2006).  Light lithophile elements in pyroxenes of NWA817 and other Martian meteorites: Implications for water in Martian magmas.  Geochim. Cosmochim. Acta., 70. Trivi, M.E., Burry, L.S. & D'Antoni, H.L.  (2006).  Dispersión-Depositación del Polen Actual en Tierra del Fuego, Argentina. [Front cover of the issue with illustrations of the article].  Revista Mexicana de Biodiversidad, UNAM, 77:1. Trivi, M.E., Burry, L.S. & D'Antoni, H.L.  (Submitted, 2006).  Fechas Radiocarbónicas de una Turbera Holocénica del Centro de Tierra del Fuego.  Relaciones de la Asociación, Antropológica Argentina. Tsou, P., Brownlee, D.E., Flynn, G.J., Hörz, F., Keller, L., McKeegan, K., Sandford, S.A. & Zolensky, M.E.  (2006).  STARDUST's Comet Wild 2 and Contemporary Interstellar Stream Sample Status [Abstract].  Lunar and Planetary Science, XXXVII. Visscher, P.T., Dupraz, C., Braissant, O., Decho, A.W., Reid, R.P. & Paerl, H.W.  (In Press, 2006).  Geology, microbiology, chemistry and physics in the Bahamas: Learning our past, predicting our future. (Extended conference abstract).  Beyond Walls: Interdisciplinary Research on the Bahamas, Nassau, Bahamas. Vogel, M.B., Des Marais, D.J., Zinniker, D.J. & Moldowan, J.M.  (2005).  Branched alkanes in Precambrian manganese carbonates and modern hypersaline environments [Abstract].  22nd International Meeting of Organic Geochemists, Seville, Spain. Vogel, M.B., es Marais D.J., D. & Jahnke, L.L.  (2006).  Organosulfur Compounds (OSC) of sediment and microbial biomass from hypersaline ponds at Guerrero Negro, Mexico: Interpreting sulfurized biomarkers from a Martian analogue environment [Abstract].  Astrobiology, 6(1):214. Vogel, M.B., Moldowan, J.M. & Zinniker, D.  (2005).  Biomarkers from units in the Uinta Mountain and Chuar Groups.  Uinta Mountain Geology: Utah Geological Association Publication, 33. Vogel, M.B., Moldowan, J.M., Jahnke, L.L., Des Marais, D.J. & Dehler, C.M.  (2005).  Biomarkers From The Neoproterozoic Red Pine Shale, Uinta Mountain Group, Utah [Abstract].  Geological Society of America Abstracts with Programs, 37:7. Ward, D.M., Blumberg, B., Des Marais, D.J., Farmer, J., Hinman, N.W., Hoehler, T.M., Jahnke, L.L., Mancinelli, R.L., Rothschild, L.J. & Tsairides, C.J.  (2006).  Research on extremophiles and astrobiology to be showcased in a new Old Faithful visitor education center in Yellowstone National Park [Abstract]. 2006 Astrobiology Science Conference.  Astrobiology, 6(1):154. Ward, D.M., Blumberg, B.S., Des Marais, D.J., Farmer, J., Hinman, N., Hoehler, T., Jahnke, L., Mancinelli, R.L., Rothschild, L.J. & Tsairides, C.J.  (2006).  Research on extremophiles and astrobiology to be showcased in a new Old Faithful Visitor Education Center in Yellowstone National Park. [Abstract].  Astrobiology, 6(1):154. Wilson, M.A., Pohorille, A. & Schweighofer, K.  (2006).  Modeling a prebiotic, putative ATP-binding site [Abstract].  Astrobiology, 6:279. Wolf, A. & Laughlin, G.  (In Press, 2006).  A Determination of the Spin-Orbit Alignment of the Anomalously Dense Planet Orbiting HD 149026.  Astrophysical Journal.