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Carbon isotope ratios

Method for the determination of concentration and stable carbon isotope ratios of atmospheric phenols

Method for the determination of concentration and stable carbon isotope ratios of atmospheric phenols

... of isotope ratios to substantiate the validity of ex- trapolation of smog chamber studies to atmospheric condi- tions (Irei et ...Stable carbon isotopic compositions of SOA precursors have been ...

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Detecting the fingerprint of drought across Europe’s forests: do carbon isotope ratios and stem growth rates tell similar stories?

Detecting the fingerprint of drought across Europe’s forests: do carbon isotope ratios and stem growth rates tell similar stories?

... not carbon isotope ratios and stem growth rates show coordinated responses to drought across Europe’s ...in carbon isotope ratios associated with stomatal regula- tion during ...

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Interpretation and application of carbon isotope ratios in freshwater diatom silica

Interpretation and application of carbon isotope ratios in freshwater diatom silica

... samples of lakes situated across central, north-west and northern Europe were analysed. These sediments were collected as part of a broader sampling campaign designed to study the relationship between methane ...

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Differences in Leaf Water Use Efficiency Among Soybean Cultivars not Well Correlated with Carbon Isotope Ratios

Differences in Leaf Water Use Efficiency Among Soybean Cultivars not Well Correlated with Carbon Isotope Ratios

... steady-state rates of leaf gas exchange could be measured within one minute of enclosing leaves in the cuvettes. Tests showed that stomatal conductance did not change within a minute of changing the water vapor or ...

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A method for stable carbon isotope ratio and concentration measurements of ambient aromatic hydrocarbons

A method for stable carbon isotope ratio and concentration measurements of ambient aromatic hydrocarbons

... stable carbon isotope ratios and concentration of ambient volatile organic compounds (VOCs) is ...and isotope ratio analysis by iso- tope ratio mass ...stable carbon isotope ...

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Pervasive aerobic nitrogen cycling in the surface ocean across the Paleoproterozoic Era

Pervasive aerobic nitrogen cycling in the surface ocean across the Paleoproterozoic Era

... Most units contain carbon isotope ratios that are depleted below the normal range for marine phytoplankton -26‰ ± 7‰; Schidlowski, 2001, perhaps reflecting heterotrophic degradation of s[r] ...

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Evaluation of Accuracy and Precision of IRMS by Using Standard Materials and Applications

Evaluation of Accuracy and Precision of IRMS by Using Standard Materials and Applications

... The isotope ratio mass spectrometer (IRMS) is an instrument that measures both of the elemental contents and isotope ratios of hydrogen, oxygen, carbon, nitrogen and sulfur in environmental ...

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New Identity of the Kimberlite Melt: Constraints from Unaltered Diamondiferous Udachnaya East Pipe Kimberlite, Siberia, Russia

New Identity of the Kimberlite Melt: Constraints from Unaltered Diamondiferous Udachnaya East Pipe Kimberlite, Siberia, Russia

... and carbon isotope ratios were determined at the Central Science Laboratory, University of Tasmania and at the Rafter Research Centre, Institute of Geological and Nuclear Sciences (New Zealand) using ...

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Contribution of larval nutrition to adult reproduction in Drosophila melanogaster

Contribution of larval nutrition to adult reproduction in Drosophila melanogaster

... stable isotope analysis were reared on either a cane-sugar- or beet-sugar-based diet as ...potential carbon sources for developing larvae and adult ...stable isotope analyses of ovaries from 1- to ...

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The first investigation of Wilms’ tumour atomic structure– nitrogen and carbon isotopic composition as a novel biomarker for the most individual approach in cancer disease

The first investigation of Wilms’ tumour atomic structure– nitrogen and carbon isotopic composition as a novel biomarker for the most individual approach in cancer disease

... level. Isotope Ratio Mass Spectrometry (IRMS) was used to directly assess the isotope ratios of nitrogen and carbon in 84 Wilms’ tumour tissue samples from 28 cases representing the ...

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Record of Early Toarcian carbon cycle perturbations in a nearshore environment: the Bascharage section (easternmost Paris Basin)

Record of Early Toarcian carbon cycle perturbations in a nearshore environment: the Bascharage section (easternmost Paris Basin)

... organic carbon (% TOC) content, and stable isotopes (carbon and oxygen) from car- bonate for the Bascharage ...in carbon isotope ratios, accompanied by an increase in the carbonate ...

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Identification and characterization of a tomato introgression line with reduced wilting under drought

Identification and characterization of a tomato introgression line with reduced wilting under drought

... transpiration rate (E). The delayed wilting of WELL is probably a physical expression of drought resistance, and more specifically, dehydration avoidance through limited plant water loss under conditions of low soil ...

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Continental carbonate facies of a Neoproterozoic panglaciation, north east Svalbard

Continental carbonate facies of a Neoproterozoic panglaciation, north east Svalbard

... Carbon and oxygen stable isotope data are presented here as δ13C and δ18O in parts per... and other isotope analyses will be presented elsewhere..[r] ...

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Chromium Isotopes Detection in their Ores with Minimal Errors

Chromium Isotopes Detection in their Ores with Minimal Errors

... fusions. Isotope assay of chromyl fl uoride under certain conditions was measured and the measurements of chromium isotopic anomalies ratios and isotope abundance of the chromite ores have been ...

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Oxygen isotope ratios in coexisting minerals of regionally metamorphosed rocks

Oxygen isotope ratios in coexisting minerals of regionally metamorphosed rocks

... Mineral size {mml comments equant Quartz 0.3 Oligoclase twinning uncommon 0.6 Muscovite 0.2 well-oriented 0.2 well-oriented Biotite Sphene < 0.1 anhedral Apatite < 0.1 subhedral Opaques [r] ...

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The Monoglyceride Pathway of Fat Absorption in Man

The Monoglyceride Pathway of Fat Absorption in Man

... the isotope ratios of the two components (glycerol and fatty acid) of the lymph glycerides with the ratios of these components of the original meal glyceride showed little change during the initial ...

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Multiple negative carbon-isotope excursions during the Carnian Pluvial Episode (Late Triassic)

Multiple negative carbon-isotope excursions during the Carnian Pluvial Episode (Late Triassic)

... organic carbon depends on a number of factors such as the source when fixed during photosynthesis by primary producers, the photosynthetic pathway used to fix the carbon, and the environmental conditions ...

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Nitrogen isotope ratios identify nitrate contamination sources

Nitrogen isotope ratios identify nitrate contamination sources

... 615Nconcentratlonswlth depth for Inorganic fertilizer, animal feedlot, septic tank on-site sewage disposal and natural soil organic matter sites In the Davis area southern Sacramento Val[r] ...

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Oxygen and Hydrogen Isotope Ratios in Sedimentary Rocks and Minerals

Oxygen and Hydrogen Isotope Ratios in Sedimentary Rocks and Minerals

... The clay mineral suites of the ocean sediments cannot therefore be interpreted as being entirely composed of minerals in isotopic equilibrium with sea water or w[r] ...

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Rapid CO2 mineralisation into calcite at the CarbFix storage site quantified using calcium isotopes

Rapid CO2 mineralisation into calcite at the CarbFix storage site quantified using calcium isotopes

... Ca isotope ratios in the post-injection samples are dominantly controlled by calcite precipitation, identical calculations can be performed as for the pre-injection ...

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