Content with the tag: “astrochemistry”
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Astrobiologists Reproduce RNA Component in Laboratory
NASA astrobiologists studying the origin of life have reproduced uracil, a key component of RNA, in the laboratory. They discovered that an ice sample containing pyrimidines exposed to ultraviolet radiation under space-like conditions produces this essential ingredient of life. The study appears in the September issue of Astrobiology.
“We have demonstrated for the first time that we can make uracil, a component of RNA, non-biologically in a laboratory under conditions found in space,” said Michel Nuevo, research scientist at NASA’s Ames Research Center. “We are showing that these laboratory processes, which simulate occurrences in...
Source: [NASA Press Release]
November 6, 2009 / Posted by: Daniella Scalice
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Astrobiologist Discusses Her Highly Cited Work in Astrochemistry
An analysis of publications in astrochemistry by Science Watch reveals that the work of astrobiologist Pascale Ehrenfreund of George Washington University’s Space Policy Institute is highly cited in other publications. It ranks at #5 by total cites, #6 by papers, and #5 by cites per paper. Her record in this analysis includes 20 papers cited a total of 445 times. Three of these papers are on the list of the 20 most-cited papers over the past decade, and one is on the list of the 20 most-cited papers over the past two...
Source: [Science Watch]
June 4, 2008 / Posted by: Daniella Scalice
Chemical Models of Nebular Processes
ROADMAP OBJECTIVES: 1.1
Module 1: The Building Blocks of Life
ROADMAP OBJECTIVES: 3.1, 3.2, 4.2, 7.1
Prebiotic Organics from Space
ROADMAP OBJECTIVES: 1.1, 2.1, 2.2, 3.1, 3.4, 4.3, 7.1, 7.2
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data laser laser desorption lassen lassen volcanic national park late accretion late bombardment late heavy bombardment ldn 673 left-handed lefty level of analysis lexen program life life and environment life elsewhere in the universe life in extreme life in our solar system life in the universe life on mars light lightning li isotopes lipids liquid liquid chromatography mass spectrometry lithic clasts lithophiles living in the microbial world: summer teacher enhancement - august 1999 lmt low-mass low-mass stars low albedo deposits lunar-like satellites lunar exploration lunar impacts mssbauer mafic maghemite magnesite magnet magnetic field magnetic fields magnetic fields - stars magnetite magnets main belt asteroids main belt comets maine malawimonas jakobiformis maps marco polo marine ecology marine sediments eukaryotes mars mars. mars analog mars analog. mars analogs mars analog site mars analogues mars atmosphere mars environmental chamber mars exploration mars express mars 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organic molecules organics organic synthesis origin of ion channels origin of life origin of transmembrane proteins origins of life origins of protein function orion nebula-like osmium isotopes osmosis outer solar system outgassing outreach oven ovens oxidation oxidative stress oxidize acetate anaerobicallly oxygen oxygenic photosynthesis oxygen isotopes ozone ozone production pah paleobiology paleoecology paleoproterozoic paleosol pan-starrs panspermia parachute parasitism past-ecosystem process model past-sea surface temperature past carbon cycle past climate past net primary production pavilion lake pbs pelagophytes pelobionts perchlorate perldbi permafrost permian peroxy defects petrology phage phenotypic changes philosophy phoenix phoenix mission phospholipid fatty acids phosphorus phosphorus limitation photo-dissociation photochemistry photosynthesis photosynthetic photosynthetic communities photsynthesis phyllosilicate phylogenetic phylogeny physiology pigments placozoa planetary accretion planetary disks planetary dynamics planetary formation planetary geology planetary geologyearly biosphere planetary habitability planetary oxidation planetary protection planetary protection. mars sample return planetary science planetary systems: formation planetary systems: protoplanetary disks planet formation planet formation. planet detection. planetary dynamics. planet migration planets planets and satellites plankton plant-fungal symbioses plants plasticity plate tectonics. playa pnas podcast polar drilling polar wander poles pollen analysis poly(a)-rna polycyclic aromatic hydrocarbons popularization population genetics poster pre–main‐sequence pre-biotic chemistry pre-main sequence stars prebiotic chemistry prebiotic molecules prebiotic soup precambrian precambrian redox environment precambrian research (journal) pre main-sequence - x-rays preservation primer primordial soup probe proceedings of the national academy of sciences (journal) prokaryote prokaryotes propane protein enzymes protein evolution proteins proteobacteria proterozoic proterozoic-cambrian proterozoic doushantuo formation proterozoic nama group proterozoic sediments protiens proto-metabolism protocells protocellular protocellular catalysts protoplanetary disk ps1 psi_blast psychrotolerant public pyrite pyrosequencing pyroxenes and olivine. pyruvic acid quantifying quantum quantum mechanics quartet radiation radiation chemistry radiative-transfer models radiative transfer radiative transfer model radio radioactivity radiolysis radio new york raman microscope raman spectroscopy raman spectroscopy` rdna reclinomonas americana redox redox-sensitive metals redox evolution redox processes reduction remote-sensing remote-sensing techniques remote sensing remote sensing database reptiles ribosomal gene ribosomal rna ribosomal rna phylogeny rio tinto rise of oxygen rna rna display rna world robatic robot robotic robotics robots rover rovers rrna saline salt sam (sample 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stars stars - x-rays stars: late-type steam atmosphere stellar flares steranes sterols stromatolites student internship sub-permafrost ecosystem subglacial volcanic lake subseafloor subseafloor hyperthermophiles subsurface subsurface biosphere subsurface life subsurface microbiology subterranean plants sulfate sulfate reducing bacteria sulfate reduction sulfide sulfide minerals sulfides sulfidic cave sulfidic mesoproterozoic ocean sulfur sulfuric acid speleogenesis sulfur isotopes sulfur mif summer camp summer school sun sun-like stars super-earths super earths supergiant star supergiant stars supertrees surface temperature and relative humidity svalbard symbioses symbiosis-specific genes symbiotic synchrotron szostak tardigrade targeted metal uptake tca cycle teachers technology worlds tectonics tega telomeres temperate-controlled mineral growth templates temporal frameworks teraforming terraforming terrestrial terrestrial atmospheres terrestrial planet finder (tpf) terrestrial planet 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molecular evolution at woods hole - august 1999 yeast yellowstone young binaries young stellar objects zircon zircons zoe
