Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 28 for “"astrobiology"”.
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Planetary Materials Science and Astrobiology
Planetary materials contain signatures of diverse processes in their mineralogy, chemistry, textures and assemblages. The record contained in planetary materials reflects the complex and commonly overprinting relationships between many processes. Discerning what mechanisms have operated to produce …
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SYNTHESIS, CHARACTERIZATION, AND THERMAL INVESTIGATION OF METAL PHOSPHITES AND POTENTIAL IMPLICATIONS FOR ASTROBIOLOGY
<p>The role of phosphorus in biochemistry is well understood. However, the route by which phosphorus was incorporated into early biomolecules on the prebiotic Earth is uncertain. Phosphate, the most prevalent species of phosphorus found in Earth’s geological record, is insoluble and unreactive with …
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Method Development for the Application of Vibrational Spectroscopy to Complex Organic-Inorganic Materials in Astrobiology. A Systematic Development of Raman Spectroscopy and Related Analytical Methods to the Structural Chemistry at Organic (Biological) and Inorganic (Mineralogical) Interfaces of Material Assemblies Relevant to Astrobiology and Inter-Planetary Science.
In the search for the conformation of extant or extinct life in an extraterrestrial setting the detection of organic molecular species which may be considered diagnostic of life is a key objective. These molecular targets comprise a range of distinct chemical species, with recognisable …
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Melvin Calvin : Nobel-Winning chemist and SETI scientist wannabe
… the origins of life in the universe. Astrobiology efforts peppered his career, from theorizing about chemical evolution to inspecting meteorites and moon rocks to joining the Order of the Dolphin at the first Search for Extraterrestrial Intelligence (SETI) conference in 1961.
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AcidopHiles : a not- so-basic life
… they have particular interest in the field of astrobiology, the search for extraterrestrial life.
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An Investigation Of Climate Patterns On Earth-Like Planets Using The NASA GISS Global Climate Model II
… worlds will provide a valuable resource to the astrobiology community in support of future detections of exoplanets with masses, sizes, and composition similar to Earth. At present, most studies involved the use of 1-D, or 2-D climate models to explore planetary climate on Earth-like planets. …
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The Search For Volatile Biogenic Emissions In Geothermal Areas
A primary discipline of astrobiology is the search for life outside of the earth’s ecosystem. Detecting biosignatures in outer space is one way this search is conducted. To understand the biosignatures to look for and study in space, it is useful to gain a better understanding of life in diverse …
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The Search For Volatile Biogenic Emissions In Geothermal Areas
A primary discipline of astrobiology is the search for life outside of the earth’s ecosystem. Detecting biosignatures in outer space is one way this search is conducted. To understand the biosignatures to look for and study in space, it is useful to gain a better understanding of life in diverse …
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Lateral Transfer of DNA in Protocell-like Synthetic Cells
… between primitive cells is a central problem in Astrobiology and Geobiology. This thesis investigates whether electroporation can mediate the transfer of DNA into and between synthetic cells, potentially enabling gene expression in initially DNA-free compartments. Both TXTL and PURE-based …
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The effect of chaotropic magnesium chloride on the growth of microbes
… microbes would have implications for astrobiology and in the search for extra-terrestrial life or the potential of life in chaotropic (or similar) extra-terrestrial environments.
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Tholins: A Gas Phase Computational Study of Methanimine and Related Species
… the case of Titan). Scientists in the fields of astrobiology and astrochemistry believe that Titan’s current atmospheric conditions could resemble that of the primordial Earth, and as such is being studied to further our understanding of how life forms. While Titan’s atmosphere contains an …
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Deep-Space Exploration Enabled by CubeSats with Staged Electrospray Propulsion
… by the decadal survey for planetary science and astrobiology: a swarm to visit the members of an asteroid family, and a swarm to visit a broad sample of the largest asteroids. The second part is addressed by leveraging the technologically mature CubeSat platform, which already solved many of the …
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Biosignature storage in sulfate minerals- synthetic and natural investigations of the jarosite group minerals
The discovery of jarosite on Mars in 2004 generated increased interest in the properties of the mineral related to the search for life on other planets. Several studies indicate that the formation of jarosite can be linked to biological activity on Earth and biomolecules such as amino acids have …
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Biosignature storage in sulfate minerals- synthetic and natural investigations of the jarosite group minerals
The discovery of jarosite on Mars in 2004 generated increased interest in the properties of the mineral related to the search for life on other planets. Several studies indicate that the formation of jarosite can be linked to biological activity on Earth and biomolecules such as amino acids have …
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Artificial Soil Formation And Stabilization Of Material Cycles In Closed Ecological Systems For Mars Habitats
<p>Scientists are increasingly pressured to investigate novel ways in which to feed astronauts for the first mission to Mars in the 2030s. It is the aim of this thesis to conduct a preliminary investigation for soil formation of NASA JSC Mars-1A Regolith Simulant in an environmentally closed …
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The Formation and Evolution of Habitable Worlds
The next generation of ground- and space-based telescopes will probe the atmospheres, and possibly the surfaces, of Earth-sized planets in the habitable zone (HZ). However, observing time will be both expensive and limited making it essential to target only the most promising planet candidates in …
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Last Call for Life: Habitability of Terrestrial Planets Orbiting Red Giants and White Dwarfs
As a star evolves, the orbital distance where liquid water is possible on the surface of an Earth-like planet, the habitable zone, evolves as well. While stellar properties are relatively stable on the main sequence, post-main sequence evolution of a star involves significant changes in stellar …
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Following Carbon's Evolutionary Path: From Nucleosynthesis to the Solar System
Studies of carbon's evolutionary path have been conducted via millimeter and submillimeter observations of circumstellar envelopes (CSEs), planetary nebulae (PNe), molecular clouds and comets. The 12C/13C isotope ratio was measured in Galactic molecular clouds using the CN isotopologs. A gradient …
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Tracing the horizons of habitability with Venus and warm rocky exoplanets
One of the primary objectives of astronomy and planetary science is the search for life beyond Earth. This search is conducted on two frontiers: one via exploration of extreme environments within the Solar System; the other via remote sensing of exoplanets that orbit distant stars. Venus, our …
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