We describe for the first time an abiotic organic synthesis mechanism on Mars from studies of ALH84001.

Abiotic formation of hydrocarbons under hydrothermal conditions: ... Isotopic signatures of abiotic organic synthesis under geologic conditions [Abstract]. ...

Evaluating organic contamination in hydrothermal prebiotic synthesis experiments ...... Experimental abiotic synthesis of methanol in seafloor hydrothermal ...

Aug 10, 2011... chemical reactionsexist for the abiotic synthesis of organic compounds by mineral surfce-catalyzed Fischer-Tropsch Type (FTT) synthesi, ...

The high pH in parts of subduction zones may promote abiotic formation of carbohydrates like pentose sugars as well as amino acids, nucleosides and even nucleotides, since pyrophosphate is stable under alkaline conditions at low water-rocks ratios.

Although it is widely believed that production of organic compounds by Fischer Tropsch synthesis and related processes occurs in many geologic environments, unambiguous identification of compounds with an abiotic origin in natural samples has been hampered by a lack of means to discriminate between abiotic ...

The disequilibrium between seawater and igneous rocks engenders conditions for organic synthesis. In some cases, the process is strictly abiotic, as inferred from the Lost City hydrothermal system near the mid-Atlantic Ridge. In other cases, microorganisms take advantage of the thermodynamic drive for organic ...

The early history of life on earth may have been characterized by coevolution of microbial metabolism and atmospheric composition. Metabolic developments affected the composition of the atmosphere, and the resulting changes in the atmosphere stimulated the evolution of new metabolic capabilities. The first organisms eked out an existence by deriving energy from the ...

A variety of methods have been investigated in different laboratories for the polymerization of amino acids and nucleotides under abiotic conditions. They include (1) thermal polymerization, (2), direct polymerization of certain amino acid nitriles, amides or esters, (3) polymerization using polyphosphate esters, (4) polymerization under aqueous or drying conditions at ...

From the site: "Students will identify the abiotic factors that influence a river or stream and the organisms that live in it. Abiotic factors include: ... ...

It has become widely accepted among geochemists that methane and other organic compounds are readily synthesized in hydrothermal systems, and that the products of this synthesis make a significant contribution to the hydrocarbons observed in vapors and fluids from hydrothermal environments. The mechanism most frequently invoked for this ...

Numerous processes have been proposed for the abiotic synthesis of organic com- pounds deemed essential for life's origin. However, none of these pathways for abiotic synthesis on Earth result in the stereochemistry that is observed for all life on Earth. All experiments utilizing ...

Abiotic organic reactions, such as hydrolysis, elimination, substitution, redox, and polymerization reactions, can be influenced by surfaces of clay and primary minerals, and of metal oxides. This influence is due to adsorption of the reactants to surface...

In the presence of water, olivine of ultramafic rock is oxidized during the process referred to as `serpentinization'. Water in contact with the olivine is reduced to molecular hydrogen (H2) with the concomitant oxidation of Fe(II). The molecular hydrogen formed may be used as an energy source by lithotrophic bacteria, but may, at high temperature, also be combined with CO2 for the ...

The formation of organic compounds during the decomposition of iron oxalate dihydrate (IOD) was investigated as a possible analog for abiotic organic synthesis in geological systems. After heating at 330 degrees C for 2-4 days, IOD decomposed to a mixture of the minerals siderite and magnetite plus gas and ...

A method for assessing the abiotic efficiency of water-dispersed nano-sized silver particles is suggested. Nanoparticles were obtained by the method of biochemical synthesis in reversed micelles made from anionic surfactant bis-(2-ethylhexyl) sodium sulfosuccinate (AOT). A water dispersion of nanoparticles was prepared from the micellar solution in ...

Mar 1, 2011 ... Abiotic synthesis of purines and other heterocyclic compounds by the ... The total yields of the identified heterocyclic compounds are ...

... Bacterial growth and biodegradation of RDX and HMX ... it is possible that decomposition of the ... method for measuring bacterial protein synthesis ...

Original extracts from an unpublished 1958 experiment conducted by the late Stanley L. Miller were recently found and analyzed using modern state-of-the-art analytical methods. The extracts were produced by the action of an electric discharge on a mixture of methane (CH(4)), hydrogen sulfide (H(2)S), ammonia (NH(3)), and carbon dioxide (CO(2)). Racemic methionine was formed in significant yields, ...

Original extracts from an unpublished 1958 experiment conducted by the late Stanley L. Miller were recently found and analyzed using modern state-of-the-art analytical methods. The extracts were produced by the action of an electric discharge on a mixture of methane (CH4), hydrogen sulfide (H2S), ammonia (NH3), and carbon dioxide (CO2). Racemic methionine was formed in significant yields, together ...

The synthesis of purines and pyrimidines using Oparin-Urey-type primitive earth atmospheres has been