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1. Microbial Trace Metal Requirements: Limiting Nutrients and Potential Biosignatures

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2. TAXIC AND PHYLOGENETIC APPROACHES TO UNDERSTANDING THE LATE ORDOVICIAN MASS EXTINCTION AND EARLY SILURIAN RECOVERY

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3. MOLECULAR AND ISOTOPIC INVESTIGATIONS OF THE BIOGEOCHEMISTRY OF ARCHAEAL ETHER LIPIDS

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4. MICROBIAL ECOLOGY AND BIOGEOCHEMISTRY OF SULFIDIC KARST ECOSYSTEMS

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5. Geochemical Requirements of the anaerobic oxidation of methane in the Eel River Basin

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7. Bacteriohopanepoyols Across Environmental Gradients

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9. Methanosarcinales biogeochemistry, implications for methane cycling

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10. Biogeochemistry of Isoprenoid Production and Anaerobic Hydrocarbon Biodgeradation

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11. The Diversity and Coping Mechanisms of Life Inhabiting the Hypersaline Dead Sea

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12. Quantifying Subsurface Nitrate Transport and Remediation Using Gene Expression and Finite Element Models

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14. Intramolecular Isotopic Variation in Acetate from Soils and Sediments

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15. From Angstroms to Microns: Studies of Interfaces and Macromolecules with Geochemical Implications Using Computational and Nonlinear Optical Tools

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16. STRUCTURAL TRANSFORMATIONS OF BIRNESSITE (δ-MnO2) DURING BIOLOGICAL AND ABIOLOGICAL REDUCTION

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19. Exogenous and Endogenous Sources of Organic Compounds on the Early Earth: Investigating Carbonaceous Meteorites and Plausibly Prebiotic Complex Mixtures by Liquid Chromatography-mass Spectrometry

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20. Terrestrial planets under extreme radiative forcings: applications to habitable zones, early Mars, and a high-co2 Earth

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21. Culture-dependent and independent studies of sulfur oxidizing bacteria from the Frasassi Caves

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22. mechanisms of sulfur isotope fractionation during thermochemical sulfate reduction by amino acids: implications for the Mif-s record in archean rocks

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23. Assessment and advancement of approaches for the study of subseafloor microbial communities

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24. Metabolic Potential and Diversity of the Microbial Communities in a Sulfidic Cave System

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25. A molecular analysis of subsurface microbial communities across a hydrothermal gradient in Okinawa Trough sediments

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26. Micro-Scale Sulfur and Carbon Isotope and Trace Metal Analysis of a Neoarchean Stromatolite: Evidence for a Redox Transition in Epeiric Platform Carbonates Prior to the Great Oxidation Event

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27. Oxygen as a Biosignature on Terrestrial Planets

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28. Extremophiles in Built Environments

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29. THE REACTIVITY OF NITROGEN HETEROCYCLES IN COMPLEX PREBIOTIC MIXTURES: USING CHEMICAL TRENDS TO EVALUATE PLAUSIBLE STRUCTURES OF PRIMITIVE GENETIC MATERIAL ON EARLY EARTH

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30. CO2, O2, and the History of the Greenhouse Effect: Select Problems in the Evolution of Earth's Atmosphere and Climate

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31. Post-depositional Alteration of Organic Material: Implications for Interpreting Molecular Biosignatures

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32. Utilizing 234U/238U and 87Sr/86Sr to understand the provenance and fate of uranium in Shaver’s Creek, Pennsylvania

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33. Enhanced Evaluation of Martian Habitability in the Past and Present: The Search for Viable Electron Donors

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