Search Results - "Cody, G. D"

Re-conceptualizing the origins of life by Walker, Sara I., Packard, N., Cody, G. D.

“…Over the last several hundred years of scientific progress, we have arrived at a deep understanding of the non-living world. We have not yet achieved an…”
Get full text

Elemental, isotopic, and structural changes in Tagish Lake insoluble organic matter produced by parent body processes by Alexander, C. M. O'D., Cody, G. D., Kebukawa, Y., Bowden, R., Fogel, M. L., Kilcoyne, A. L. D., Nittler, L. R., Herd, C. D. K.

“…Here, we present the results of a multitechnique study of the bulk properties of insoluble organic material (IOM) from the Tagish Lake meteorite, including…”
Get full text

Young poorly crystalline graphite in the >3.8-Gyr-old Nuvvuagittuq banded iron formation by Papineau, D., De Gregorio, B. T., Cody, G. D., O’Neil, J., Steele, A., Stroud, R. M., Fogel, M. L.

“…Carbonaceous minerals in 3.8-billion-year-old rocks from West Greenland have been used as evidence for early life on Earth. Geochemical analyses of similar…”
Get full text

Primordial Carbonylated Iron-Sulfur Compounds and the Synthesis of Pyruvate by Cody, George D., Boctor, Nabil Z., Filley, Timothy R., Hazen, Robert M., Scott, James H., Sharma, Anurag, Yoder, Hatten S.

“…Experiments exploring the potential catalytic role of iron sulfide at 250°C and elevated pressures (50, 100, and 200 megapascals) revealed a facile,…”
Get full text

XANES analysis of organic residues produced from the UV irradiation of astrophysical ice analogs by Nuevo, M., Milam, S.N., Sandford, S.A., De Gregorio, B.T., Cody, G.D., Kilcoyne, A.L.D.

“…Organic residues formed in the laboratory from the ultraviolet (UV) photo-irradiation or ion bombardment of astrophysical ice analogs have been extensively…”
Get full text

Solid-state ( 1 H and 13 C) nuclear magnetic resonance spectroscopy of insoluble organic residue in the Murchison meteorite: a self-consistent quantitative analysis by Cody, G.D., Alexander, C.M.O’D., Tera, F.

“…Complementary, double- and single-resonance solid-state (H-1 and C-13) nuclear magnetic resonance (NMR) experiments were performed on a solvent extracted and…”
Get full text

Lignin demethylation and polysaccharide decomposition in spruce sapwood degraded by brown rot fungi by FILLEY, T. R, CODY, G. D, GOODELL, B, JELLISON, J, NOSER, C, OSTROFSKY, A

Get full text

The Origin of Intermediary Metabolism by Morowitz, Harold J., Kostelnik, Jennifer D., Yang, Jeremy, Cody, George D.

“…The core of intermediary metabolism in autotrophs is the citric acid cycle. In a certain group of chemoautotrophs, the reductive citric acid cycle is an engine…”
Get full text

The origin and evolution of chondrites recorded in the elemental and isotopic compositions of their macromolecular organic matter by Alexander, C.M.O’D., Fogel, M., Yabuta, H., Cody, G.D.

“…Extraterrestrial organic matter in meteorites potentially retains a unique record of synthesis and chemical/thermal modification by parent body, nebular and…”
Get full text

Deuterium enrichments in chondritic macromolecular material—Implications for the origin and evolution of organics, water and asteroids by Alexander, C.M.O’D., Newsome, S.D., Fogel, M.L., Nittler, L.R., Busemann, H., Cody, G.D.

“…Here we report the elemental and isotopic compositions of the insoluble organic material (IOM) isolated from several previously unanalyzed meteorites, as well…”
Get full text

Geochemical roots of autotrophic carbon fixation - Hydrothermal experiments in the system citric acid, H2O-(+/-FeS)-(+/-NiS) by Cody, G D, Boctor, N Z, Hazen, R M, Brandes, J A, Morowitz, H J, Yoder Jr, H S

“…Recent theories have proposed that life arose from primitive hydrothermal environments employing chemical reactions analogous to the reductive citrate cycle…”
Get full text

Organic thermometry for chondritic parent bodies by Cody, G.D., Alexander, C.M.O'D., Yabuta, H., Kilcoyne, A.L.D., Araki, T., Ade, H., Dera, P., Fogel, M., Militzer, B., Mysen, B.O.

“…A unique spectroscopic feature has been identified in a study of twenty-five different samples of meteoritic insoluble organic matter (IOM) spanning multiple…”
Get full text

Abiotic nitrogen reduction on the early Earth by Brandes, Jay A, Boctor, Nabil Z, Cody, George D, Cooper, Benjamin A, Hazen, Robert M, Yoder, Hatten S

“…The production of organic precursors to life depends critically onthe form of the reactants. In particular, an environment dominated by N2 is far less…”
Get full text

Particle granular temperature in gas fluidized beds by Cody, G.D., Goldfarb, D.J., Storch, G.V., Norris, A.N.

“…In this paper we introduce and validate a novel non-intrusive probe of the average kinetic energy, or granular temperature, of the particles at the wall of a…”
Get full text

Determination of chemical-structural changes in vitrinite accompanying luminescence alteration using C-NEXAFS analysis by Cody, G.D., Ade, H., Wirick, S., Mitchell, G.D., Davis, A.

“…The phenomenon of luminescence alteration has been shown to correlate with the thermal maturity of Type III kerogens (vitrinites). In order to establish a…”
Get full text

Disorder and the Optical-Absorption Edge of Hydrogenated Amorphous Silicon by Cody, G. D., Tiedje, T., Abeles, B., Brooks, B., Goldstein, Y.

Get full text

Nature of polymerization and properties of silicate melts and glasses at high pressure by Lee, Sung Keun, Cody, George D., Fei, Yingwei, Mysen, Bjorn O.

“…The structures of sodium silicate and aluminosilicate glasses quenched from melts at high pressure (6–10 GPa) with varying degrees of polymerization (fractions…”
Get full text

Assaying the catalytic potential of transition metal sulfides for abiotic carbon fixation by Cody, G.D, Boctor, N.Z, Brandes, J.A, Filley, T.R, Hazen, R.M, Yoder, H.S

“…A suite of nickel, cobalt, iron, copper, and zinc containing sulfides are assayed for the promotion of a model carbon fixation reaction with relevance to local…”
Get full text

Microbial Activity at Gigapascal Pressures by Sharma, Anurag, Scott, James H., Cody, George D., Fogel, Marilyn L., Hazen, Robert M., Hemley, Russell J., Huntress, Wesley T.

“…We observed physiological and metabolic activity of Shewanella oneidensis strain MR1 and Escherichia coli strain MG1655 at pressures of 68 to 1680 megapascals…”
Get full text

Solubility and solution mechanism of H2O in alkali silicate melts and glasses at high pressure and temperature by Mysen, B O, Cody, G D

“…The solubility behavior of H2O in melts in the system Na2O-SiO2- H2O was determined by locating the univariant phase boundary, melt = melt + vapor in the 0.8-2…”
Get full text