Content with the tag: “amino acids”
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NASA Researchers Make First Discovery of Life's Building Block in Comet
This is an artist's concept of particle hits on the aerogel collection grid. The greenish areas represent the aerogel. Hits are the light green teardrop-shaped areas. Particles are represented by dots at the tips of the teardrops. Credit: NASA/JPLNASA scientists have discovered glycine, a fundamental building block of life, in samples of comet Wild 2 returned by NASA’s Stardust spacecraft.
“Glycine is an amino acid used by living organisms to make proteins, and this is the first time an amino acid has been found in a comet,” said Dr. Jamie Elsila of NASA’s Goddard Space Flight Center in Greenbelt, Md. “Our discovery supports the theory that some of life’s ingredients formed in space and were delivered to Earth long ago by meteorite and comet impacts.”
Elsila is the lead author of a paper...
Source: [Link]
August 17, 2009 / Posted by: Daniella Scalice
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Meteorites a Rich Source for Primordial Soup
Scientists from NAI’s Carnegie Institution of Washington Team have a new paper in Meteoritics and Planetary Science detailing their discovery of amino acids in two meteorites at concentrations ten times higher than levels previously measured in other similar meteorites. The result suggests that the early solar system was far richer in the organic building blocks of life than scientists had thought, and that fallout from space may have spiked Earth’s primordial broth. Click here to download the paper.
March 13, 2008 / Posted by: Daniella Scalice
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Mineral Surfaces and Life
Robert Hazen, from NAI’s Carnegie Institution of Washington Team, published his 2005 Presidential Address to the Mineralogical Society of America in this month’s American Mineralogist. The address reviews the role of mineral surfaces on the self-assembly of lipids, the polymerization of amino acids and nucleic acids, and the selective adsorption of organic species, including chiral molecules, onto mineral surfaces.
Source: [Link]
November 20, 2006 / Posted by: Shige Abe
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Amino Acids Found in Antarctic Meteorites
Researchers from NAI’s NASA Goddard Space Flight Center Team and their colleagues publish their analysis of two meteorites in the current issue of Meteoritics and Planetary Science. Their study revealed a suite of amino acids present in the meteorites that are not present in the Antarctic ice on which they were found.
Source: [Link]
June 19, 2006 / Posted by: Shige Abe
A search for primordial water from deep in the Earth's mantle
ROADMAP OBJECTIVES: 1.1, 4.1
A Self-Perpetuating Catalyst for the Production of Organics in Protostellar Nebulae
ROADMAP OBJECTIVES: 1.1, 3.1
Acquisition and Installation of a new Cameca ims 1280 ion microprobe
ROADMAP OBJECTIVES:
Advancing Techniques for in situ Analysis of Complex Organics
ROADMAP OBJECTIVES: 2.1, 2.2, 3.1, 3.2, 7.1
Application of U-tube and fiber-optic distributed temperature sensor to characterize the chemical and physical properties of a deep permafrost and sub-permafrost environment at High Lake, Nunavut, Canada.
ROADMAP OBJECTIVES: 2.1, 5.2, 5.3, 7.1
Astrobiology Sample Analysis Program (ASAP)
ROADMAP OBJECTIVES:
Biological potential of Mars
ROADMAP OBJECTIVES: 2.1, 3.1
Biosignatures in chemosynthetic and photosynthetic systems
ROADMAP OBJECTIVES: 2.1, 4.1, 5.1, 5.2, 6.1, 7.1, 7.2
Breakdown of methane due to electric discharge: A Laboratory Investigation with Relevance to Mars
ROADMAP OBJECTIVES: 2.1
Chemical Models of Nebular Processes
ROADMAP OBJECTIVES: 1.1
Composition of Parent Volatiles in Comets: Oxidized Carbon
ROADMAP OBJECTIVES:
Current Status and Future Bioastronomy with the Large Millimeter Telescope
ROADMAP OBJECTIVES: 3.1
Early Metabolic Pathways
ROADMAP OBJECTIVES: 2, 3
Early Metabolic Pathways
ROADMAP OBJECTIVES: 3.2, 3.4
Fingerprinting Late Additions to the Earth and Moon via the Study of Highly Siderophile Elements in Lunar Impact Melt Rocks
ROADMAP OBJECTIVES: 1.1
Formation and Detection of Hot-Earth Objects in Systems with Close-in Jupiters
ROADMAP OBJECTIVES: 1.1, 1.2
Formation of Planetesimals in a Dynamically Evolving Nebula
ROADMAP OBJECTIVES: 1.1
Genes that regulate photosymbiotic relationships
ROADMAP OBJECTIVES: 2
Habitable Planets
ROADMAP OBJECTIVES: 1.1, 1.2, 2.1, 4.3
Icelandic subglacial lakes
ROADMAP OBJECTIVES: 2.1, 4.1, 5.3, 6.2
Interplanetary Pioneers
ROADMAP OBJECTIVES: 5.3, 6.2
Microbial Communities and Activities in the Deep Marine Subsurface
ROADMAP OBJECTIVES: 5.1, 5.3, 6.1, 6.2
Modeling grain surface reaction pathways for large organic molecules
ROADMAP OBJECTIVES: 3.1
Organic and Inorganic Acids from Ion-irradiated Ices
ROADMAP OBJECTIVES: 2.2, 3.1, 7.1
Origin and Evolution of Organics
ROADMAP OBJECTIVES: 1.1, 2.1, 3.1
Origin and Evolution of Organics in Planetary Systems
ROADMAP OBJECTIVES: 1.1, 3.1, 3.2
Origin of Irregular Satellites
ROADMAP OBJECTIVES: 1.1
Prebiotic Organics from Space
ROADMAP OBJECTIVES: 1.1, 2.1, 2.2, 3.1, 3.4, 4.3, 7.1, 7.2
Protist diversity in extreme environments
ROADMAP OBJECTIVES: 6, 7
Recovery of comet 85P/Boethin for the Deep Impact Extended Mission
ROADMAP OBJECTIVES: 2.2
Research Activities in the Astrobiology Analytical Laboratory
ROADMAP OBJECTIVES: 1.1, 2.1, 2.2, 3.1, 7.1
Sediment-buried basement deep biosphere
ROADMAP OBJECTIVES: 1.1, 3.3, 4.1, 5.1, 5.2, 5.3, 6.1, 6.2
Societal and Philosophical Aspects of Astrobiology
ROADMAP OBJECTIVES: 18
Studies in Planetary Formation and Evolution
ROADMAP OBJECTIVES: 11, 12, 8, 9
Studies of Organic Matter and Water in Meteorites
ROADMAP OBJECTIVES: 1, 11, 8, 9
The Main Belt distribution of basaltic asteroids
ROADMAP OBJECTIVES: 2.2
THE VYSOS PROJECT
ROADMAP OBJECTIVES: 1.2
Ultra-violet processing of ices in the Rosette Nebula
ROADMAP OBJECTIVES: 3.1
Understanding the Microbial Ecology of Geologically-based Chemolithoautotrophic Communities
ROADMAP OBJECTIVES: 2.1, 4.1
Biological Studies of Hydrothermal Systems
ROADMAP OBJECTIVES: 6, 7
Mars Meteorite Focus Group (Pending)
ROADMAP OBJECTIVES: 8
Studies of Organic Matter and Water in Meteorites
ROADMAP OBJECTIVES: 1, 11, 8, 9
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