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Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
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Selective Interactions of Soil Organic Matter Compounds with Calcite and the Role of Aqueous Ca
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Plasma–liquid interactions in the presence of organic matter—A perspective
As investigations in the biomedical applications of plasma advance, a demand for describing safe and efficacious delivery of plasma is emerging. It is quite clear that not all plasmas are “equal” for all applications. This Perspective discusses limitations of the existing parameters used to define plasma in context of the need for the “right plasma” at the “right dose” for each “disease system.” The validity of results extrapolated from in vitro studies to preclinical and clinical applications is discussed. We make a case for studying the whole system as a single unit, in situ. Furthermore, we argue that while plasma-generated chemical species are the proposed key effectors in biological systems, the contribution of physical effectors (electric fields, surface charging, dielectric properties of target, changes in gap electric fields, etc.) must not be ignored.
Metabolic Constraints of Organic Matter Mineralization and Metal Cycling
Floodplains are poorly understood and dynamic components of the global carbon cycle that not are well represented in Earth system models. Further, they have a dominant influence on the cycling of important metals within critical transport conduits between surface waters and groundwater. The physical characteristics of floodplains make the hydrology and associated coupled biology and geochemistry particularly responsive to ongoing and impending changes in climate, river management, and land development
Representing Organic Matter Thermodynamics in Biogeochemical Reactions via Substrate-Explicit Modeling
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Microscale hydrogen, carbon, and nitrogen isotopic diversity of organic matter in asteroid Ryugu
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A new algorithm to retrieve chromophoric dissolved organic matter (CDOM) absorption spectra in the UV from ocean color
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Estimating the distribution of colored dissolved organic matter during the S outhern O cean G as E xchange E xperiment using four‐dimensional variational data assimilation
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Limitations of the Q 10 Coefficient for Quantifying Temperature Sensitivity of Anaerobic Organic Matter Decomposition: A Modeling Based Assessment
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Origin of Organic Matter in Early Solar System. I - Hydrocarbons
Formation of hydrocarbons by Fischer-Tropsch reaction involving carbon monoxide, hydrogen, and meteorites
Analytical techniques for identification and study of organic matter in returned lunar samples Semiannual report, 1 Oct. 1966 - 31 Mar. 1967
Development of computerized high resolution mass spectrometer and gas-liquid chromatographic facility for study of lunar soil samples
Origin of organic matter in early solar system - 2. nitrogen compounds.
Identification of nitrogenous compounds in orgueil meteorite
Origin of organic matter in early solar system - 1. hydrocarbons.
Identification of hydrocarbons in murray and orgueil meteorites
Extractable organic matter in Precambrian cherts
Precambrian cherts hydrocarbon and fatty acid concentrations and C and S stable isotope ratios, discussing biological evolution rate
Analytical techniques for identification and study of organic matter in returned lunar samples
The results of geochemical research are reviewed. Emphasis is placed on the contribution of mass spectrometric data to the solution of specific structural problems. Information on the mass spectrometric behavior of compounds of geochemical interest is reviewed and currently available techniques of particular importance to geochemistry, such as gas chromatograph-mass spectrometer coupling, modern sample introduction methods, and computer application in high resolution mass spectrometry, receive particular attention.
Thermal alteration of organic matter in recent marine sediments. 1: Pigments
Sediment from Tanner Basin, the outer continental shelf off Southern California, was analyzed for photosynthetic pigments and their derivatives, namely carotenes and chlorins. Samples of the sediment were also exposed to raised temperatures (65, 100, 150 C) for various periods of time (1 week, 1 month, 2 months). Analysis of the heat-treated sediment revealed the presence of alpha-ionene and 2,6-dimethylnapthalene, thermal degradation products of Betacarotente. Chlorins were converted to nickel porphyrins of both DPEP and etio series. Possible mechanisms of these transformations are presented.