Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 37 for “"Carbon compounds."”.
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The carbon compounds of the primeval atmosphere
<p>The question of how and when life originated on t his planet has always been an intriguing one, exceeded perhaps in fascination only by that area of speculation which concerns itself with death and the afterlife . The latter problem has generally been approached along theological lines; the …
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Activated sludge metabolism of certain quaternary carbon compounds
Thesis (Sc. D.)--Massachusetts Institute of Technology, Dept. of Civil and Sanitary Engineering, 1959.
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The Biology of Eubacterium Limosum and Its Utilization of One-Carbon Compounds
Eubacterium limosum was isolated as the most numerous methanol-utilizing anaerobe (6.3 x 10('8) cells per ml) in the rumen fluid of two sheep fed a diet in which liquid molasses was a major component.
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Analysis of the MT1/MT2 Systems Involved in the Metabolism of One-Carbon Compounds in Methanosarcina Acetivorans C2A
Embargo set by: Seth Robbins for item 72686 Lift date: Forever Reason: Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs
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A generic biokinetic model for C-14 labelled compounds
Carbon-14, a radioactive nuclide, is used in many industrial applications. Due to its wide range of uses in industry, many workers are at risk of accidental internal exposure to 14C. Being a low energy beta emitter, 14C is not a significant external radiation hazard, but the internal consequences …
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Metabolic control of the ethylmalonyl-CoA pathway in Methylobacterium extorquens AM1
… methylotroph capable of growth on reduced carbon compounds with no carbon-carbon bonds, as well as multi-carbon compounds. M. extorquens AM1 is widespread in nature and is often associated with the plant phyllosphere, a heterogeneous environment with consistently changing substrate …
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Hydrogen Gas Production By a Species of Ectothiorhodospira
… acid, alanine, and serine; addition of reduced carbon compounds such as propionate and succinate; increasing reducing power by increasing sodium sulfide concentration; and increasing the energy charge (ATP) by increasing light intensity. The use of phototrophs in waste treatment with the …
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The Photosynthetic Action Spectra of the Phytoplankton and Their Role in Governing Spatial and Temporal Distribution: A Numerical Modeling Approach
… the relative size of diatom and dinoflagellate carbon synthesis along various marine light regime gradients. A radiative transfer model taking into account both Rayleigh and Mie atmospheric optical properties is employed to define the light regime incident on the sea surface. The hydrospheric …
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Trihalomethane-forming potential of algal extracellular products and biomass
… cell suspensions were analyzed for total organic carbon and chloroform produced after chlorination. Pure solutions of representative algal extracellular metabolites were analyzed in a similar manner. The highest-yielding (chloroform-carbon per total organic carbon) compounds were released during …
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Carbon and mineral transformations in seafloor serpentinization systems
… the transformation and distribution of carbon compounds in seafloor hydrothermal systems hosted in ultramafic rock. These processes have a direct impact on carbon budgets in the oceanic lithosphere and on the sustenance of microorganisms inhabiting hydrothermal vent ecosystems. Where …
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First-principles simulations of the oxidation of methane and CO on platinum oxide surfaces and thin films
… well as their reactivities towards oxidation of carbon compounds by means of first-principles atomistic thermodynamics calculations and molecular dynamics simulations based on density functional theory. On the Pt(111) surface the most stable superficial oxide phase is found to be a thin layer of …
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Carbon and mineral transformations in seafloor serpentinization systems
… the transformation and distribution of carbon compounds in seafloor hydrothermal systems hosted in ultramafic rock. These processes have a direct impact on carbon budgets in the oceanic lithosphere and on the sustenance of microorganisms inhabiting hydrothermal vent ecosystems. Where …
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METHYLATED AMINE-UTILISING BACTERIA AND MICROBIAL NITROGEN CYCLING IN MOVILE CAVE
… In the absence of light and with no fixed carbon entering the cave, life is sustained by non-phototrophic microorganisms such as sulfur and methane oxidisers. Also present are methylotrophs that use one-carbon compounds such as methanol and methylated amines as their sole source of carbon …
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Isotopic constraints on the sources and associations of organic compounds in marine sediments
… have investigated the relationship between radiocarbon (14C) age and the different modes of association in aquatic sediments and soils. Radiocarbon is a sensitive tracer of OM provenance, with variations in its natural abundance reflecting the age and origin of material. The main objective has …
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SALT EXPOSURE AND NITROGEN METABOLISM IN TOMATO (SOLANUM LYCOPERSICUM L.): IMPROVEMENT OF THE RESILIENCE TO ABIOTIC STRESS
… Cl− reduced the availability of key anions and carbon compounds, affecting biomass and Krebs cycle intermediates. These findings underscore the distinct impacts of specific ions on N and C metabolism under salt stress, advocating for tailored agronomic strategies. The third study focused on the …
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Some reactions of methylsilane catalysed by metals
… of hydrogen bonded to silicon, dissociation of carbon-silicon bonds, and dissociation of hydrogen bonded to carbon, the processes occurring in that order. The empirical composition of the adsorbed layer at complete coverage by methylsilane is reported for each metal.Isotope exchange in the silyl …
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Atmospheric photochemistry, surface features, and potential biosignature gases of terrestrial exoplanets
… surface emission of reducing gases; (2) volcanic carbon compounds (CH4 and CO2) are likely to be abundant in terrestrial exoplanet atmospheres; but volcanic sulfur compounds (H2S and SO2) are chemically short-lived and therefore cannot accumulate in virtually any types of terrestrial exoplanet …
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Processing and Characterization of Device Solder Interconnection and Module Attachment for Power Electronics Modules
… We found that organic contaminants such as hydrocarbons remain in the form of thin monolayers on the surface, even in the case of as-received devices from the manufacturer. Moreover, in the case of polyimide passivated devices, plasma cleaning introduced a few carbon constituents on the surface, …
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Identification and Characterization of the Enzymes Involved in Biosynthesis of FAD and Tetrahydromethanopterin in Methanocaldococcus jannaschii
… and produce methane from CO2 or other simple carbon compounds. Methanogenesis is a key process of the global carbon cycle and methanogens produce about 75-85% of all methane emissions. Besides the universally occurring coenzymes that are needed in normal metabolic pathways, such as biotin, …
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