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There are a total of 28 record(s) matching your query.
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Charge Generation and Propagation in Igneous Rocks
Author(s): Freund, Friedemann
Abstract: Various electrical phenomena have been reported prior to or concurrent with earthquakes such as resistivity changes, ground potentials, electromagnetic (EM), and luminous signals. Doubts have been raised as to whether some ...
NASA Center: Ames Research Center
Publication Year: 2002
Added to NTRS: 2008-06-02
Document ID: 20010111483
Precise Chemical Analyses of Planetary Surfaces
Author(s): Kring, David; Schweitzer, Jeffrey; Meyer, Charles; Trombka, Jacob; Freund, Friedemann; Economou, Thanasis; Yen, Albert; Kim, Soon Sam; Treiman, Allan H.; Blake, David; Lisse, Carey
Abstract: We identify the chemical elements and element ratios that should be analyzed to address many of the issues identified by the Committee on Planetary and Lunar Exploration (COMPLEX). We determined that most of these issues ...
NASA Center: NASA (non Center Specific)
Publication Year: 1996
Added to NTRS: 2008-06-02
Accession Number: 96N34812; Document ID: 19960051149
Carboxylic and Dicarboxylic Acids Extracted from Crushed Magnesium Oxide Single Crystals
Author(s): Freund, Friedemann; Gupta, Alka D.; Kumar, Devendra
Abstract: Carboxylic and dicarboxylic acids (glycolic, oxalic, malonic and succinic) have been extracted with tetrahydrofuran (THE) and H2O from large synthetic MgO crystals, crushed to a medium fine powder. The extracts were ...
NASA Center: Ames Research Center
Publication Year: 1998
Added to NTRS: 2008-06-02
Document ID: 20020073387
Evolution of the Earth and Origin of Life: The Role of Gas/Fluid Interactions with Rocks
Author(s): Freund, Friedemann
Abstract: The work under the Cooperative Agreement will be centered on questions of the evolution of Life on the early Earth and possibly on Mars. It is still hotly debated whether the essential organic molecules were delivered to the ...
NASA Center: Ames Research Center
Publication Year: 2001
Added to NTRS: 2008-06-02
Document ID: 20010114456
Stimulated Mid-Infrared Luminescence Experiment: Contribution to the Study of Pre-Earthquake Phenomena and UV Absorption by Interstellar Dust
Author(s): Freund, Friedemann; Freund, Minoru M.; Tsay, Si-Chee; Ouzounov, Dimitar
Abstract: The work performed under this proposal is based on the experimentally supported observation - or inference - that a small fraction of the oxygen anions in silicate minerals in igneous and high-grade metamorphic rocks on ...
NASA Center: Goddard Space Flight Center
Publication Year: 2004
Added to NTRS: 2008-06-02
Document ID: 20040055393
Sources of Hydrogen as Food for Deep Microbial Communities
Author(s): Freund, Friedemann
Abstract: To survive in deep subsurface environments autolithotrophic microbial communities require a sustainable food supply. One possible source is H2 which forms when H2O reacts with ferrous iron at rock surfaces or mineral grain ...
NASA Center: Ames Research Center
Publication Year: 1998
Added to NTRS: 2008-06-02
Document ID: 20020073446
Physics and chemistry
Author(s): Moskovits, Martin; Allamandola, Lou; Becker, Christopher; Freund, Friedemann; Freund, M.; Haff, P.; Tarter, Jill; Walton, Otis; Weitz, David; Werner, Brad
Abstract: The following types of experiments for a proposed Space Station Microgravity Particle Research Facility are described: (1) rheology of assemblies of inelastic, frictional particles; (2) grain dynamics in zero gravity; (3) ...
NASA Center: Ames Research Center
Publication Year: 1987
Added to NTRS: 2008-05-30
Accession Number: 88N15359; Document ID: 19880005977
Hydrogen in rocks: an energy source for deep microbial communities
Author(s): Freund, Friedemann; Dickinson, J. Thomas; Cash, Michele
Abstract: To survive in deep subsurface environments, lithotrophic microbial communities require a sustainable energy source such as hydrogen. Though H2 can be produced when water reacts with fresh mineral surfaces and oxidizes ...
NASA Center: NASA (non Center Specific)
Publication Year: 2002
Added to NTRS: 2006-08-02
Document ID: 20040087963
Telltale Electric Currents During Impacts on Rocks
Author(s): Freund, Friedemann; Borucki, Jerome G.; Lise, Marshall
Abstract: Since all igneous rocks on Earth and presumably on Mars solidified from water-laden magmas, the presence of peroxy links deserves attention because, when peroxy links can break apart, they generate also known as positive ...
NASA Center: Ames Research Center
Publication Year: 1998
Added to NTRS: 2005-11-24
Document ID: 20040075787
Mineralogical Investigation of a Variety of Materials Using Analytical Electron Microscopy (AEM)
Author(s): Freund, Friedemann
Abstract: Understanding the origins of Life requires a good understanding of the physics and chemistry of biogenic low-z elements H, C, N, 0, P, S in terrestrial environments, on Mars, on extra-terrestrial bodies such as meteorite ...
NASA Center: Ames Research Center
Publication Year: 1997
Added to NTRS: 2005-08-25
Accession Number: 97N15860; Document ID: 19970010687; Report Number: NAS 1.26:203415, NASA-CR-203415
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