Stable Carbon Isotopes
Anaerobic carbon cycling pathways in the subseafloor investigated via functional genes, chemical gradients, stable carbon isotopes, and thermodynamic calculations
... (stable carbon isotopes, calculated in situ energy yields, inference of process rates from geochemical gradients), thereby helping to bridge the gap between the two approaches, and improving our ...
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Application of stable carbon isotopes in a subtropical North Atlantic mesocosm study: a new approach to assess CO2 effects on the marine carbon cycle
... Stable Carbon Isotopes Measurement Processing The three different instrument configurations used to perform stable carbon isotope analysis were calibrated by cross check measurements of ...
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Stable carbon isotopes of dissolved inorganic carbon for a zonal transect across the subpolar North Atlantic Ocean in summer 2014
... Le Quéré, C., Raupach, M. R., Canadell, J. G., Marland, G., Bopp, L., Ciais, P., Conway, T. J., Doney, S. C., Feely, R. A., Foster, P., Friedlingstein, P., Gurney, K., Houghton, R. A., House, J. I., Huntingford, C., ...
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Adding stable carbon isotopes improves model representationof the role of microbial communities in peatland methanecycling
... The simulations by the modified DNDC improved upon the predictions by the version without acetate dynamics, which failed to capture the observed relative contribution of methanogenic path[r] ...
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Stable carbon isotopes of tree rings as a tool to pinpoint the geographic origin of timber
... C (test) chronology from Kane Spring showed the highest t value with the reference chronology from Dry Canyon, which is 150 km away. The t values decreased gradually on the western side over the Colorado River drainage ...
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Stable carbon isotopes in exhaled breath as tracers for dietary information in birds and mammals
... after (C) they were fed mealworms. Before the experiment, bats had been maintained on a diet of mealworms with a stable carbon isotope signature of –24.1‰ (broken line in A). During the experiment, bats ...
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Low turnover rates of carbon isotopes in tissues of two nectar feeding bat species
... of carbon isotope turnover ranged from 100 to 134 days and did not differ significantly between blood and wing membrane, nor did it differ between the two ...of carbon isotopes in blood. The turnover ...
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Metabolic Stable Isotope Fractionation: Biogeochemical Approaches to Diagnosing Sickle Cell and Thalassemia Anemia in the Archaeological Record
... of carbon dioxide produced by CR, and therefore the concentration of both dissolved carbon dioxide and bicarbonate within the blood ...gaseous carbon dioxide at different rates than those without, ...
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Fluxes of dissolved organic matter from urban catchments in the Neuse River Basin
... precursor material can help in establishment of effective monitoring programs. DOM sources and concentrations were evaluated in this study using optical analyses (absorbance and fluorescence) and biomarkers (lignin and ...
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Investigation of tubular handling of bicarbonate in man A new approach utilizing stable carbon isotope fractionation
... abundance of stable carbon isotopes (13C, 12C) in the urinary total CO2. This novel methodology used mass spectrometric analysis of 13C/12C ratios in urinary total CO2 under normal conditions and ...
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Purifying Inorganic Phosphate using Sawdust Activated Carbon in Solid Phase Extraction for Stable Oxygen Isotope (δ18OPO4) Analysis: A Review on Different Methodological Approach
... activated carbon hinders its widespread ...activated carbon. The activation of carbon involves two important steps namely, the carbonization and ...activated carbon by chemical treatment on ...
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A brief warming event in the late Albian: evidence from calcareous nannofossils, macrofossils, and isotope geochemistry of the Gault Clay Formation, Folkestone, southeastern England
... sediment carbon and oxygen stable isotope record, which collectively indicate a brief period ( ∼ 500 kyr) of significant surface water warming (in excess of 6 ◦ C) at around ...
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Investigation of coral trout (Plectropomus spp.) movement patterns and resource use: a multidisciplinary approach using acoustic telemetry and dietary indicators
... Stable isotope comparisons between locations and periods are valuable as they highlight species-specific differences for a species group that is often treated as a single entity. The findings also suggest niche ...
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Changes in paleo-circulation and the distribution of ammonite faunas at the Coniacian–Santonian transition in central Poland and western Ukraine
... for carbon and oxygen stable isotope analy- ses were obtained from slabs of ...intervals. Carbon and oxygen stable isotope data were obtained automatically using a Thermo KIEL IV Carbonate ...
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Modelling stable water isotopes: Status and perspectives
... water isotopes have been implemented in a growing number of GCM and numerous studies have clearly demonstrated the potential of this approach for an improved interpretation of observed water isotope variability in ...
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Impact of Hurricane Floyd on Sediment Deposition, Erosion, and Benthic Nutrient Fluxes in Pamlico Sound, North Carolina
... After returning to the laboratory, the vibracore tubing was cut lengthwise using a circular saw and template. Cores were then split into halves using thin wire to cut through the sediments. One of the core halves was ...
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Siberian tree-ring and stable isotope proxies as indicators of temperature and moisture changes after major stratospheric volcanic eruptions
... The application of TRW, MXD, and cell wall thickness (CWT), as well as δ 13 C and δ 18 O, in tree cellulose chronolo- gies is a promising tool to disentangle hydroclimatic vari- ability as well as winter and early spring ...
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A secretive mechanical exchange between mantle and crustal volatiles revealed by helium isotopes in 13C depleted diamonds
... trial carbon cycle (Shirey et ...for carbon (Kaiser and Bond, ...the stable isotope values of carbon and nitrogen, where coupled δ 13 C-δ 15 N values can ...
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Evaluating larval mosquito resource partitioning in western Kenya using stable isotopes of carbon and nitrogen
... addition to a highly diverse menu for larvae in natural habitats, difficulties in identifying resource partitioning in natural habitats using stable isotope analysis alone is also likely due to the long term ...
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Long-term carbon and nitrogen dynamics at SPRUCE revealed through stable isotopes in peat profiles
... of carbon (C) and nitrogen (N) during peatland development from rich fen to ...peat carbon (rightmost top box); N flux from adjacent uplands influences productivity in the lagg region, peatland topography ...
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