carbon nitrogen stable isotopes
Understanding trophic interactions in host parasite associations using stable isotopes of carbon and nitrogen
... Parasite and fish tissue (muscle without bones, intestine and liver) samples were freeze-dried using a freeze dryer (Heto PowerDry LL3000; Thermo Fisher Scientific, Waltham, USA) and subsequently powdered using a por- ...
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A new CF-IRMS system for quantifying stable isotopes of carbon monoxide from ice cores and small air samples
... liquid nitrogen temperature to condense the air released from ice ...both carbon (2–3‰) and oxygen (4‰), thus, these adsorbents were no longer ap- ...
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Using Stable Isotopes of Carbon and Nitrogen to Mark Wild Populations of Anopheles and Aedes Mosquitoes in South-Eastern Tanzania.
... enrichment. Stable isotopes were incorporated and fixed into the larval tissues and was retained to detectable levels in newly emerged ...with nitrogen than carbon (Figs 2 and ...because ...
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Stable isotopes of captive cetaceans (killer whales and bottlenose dolphins)
... [e.g. carbon isotopic values for migration (Rau et ...on nitrogen turnover in other species and none in marine ...cetacean nitrogen half-lives ...
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Environmental stress and eutrophication in freshwater wetlands: evidence from carbon and nitrogen stable isotopes in cattail (Typha domingensis Pers.)
... The cattail δ 15 N may be controlled by various factors in- cluding the sources of N with different δ 15 N values, the concentration of DIN, and the growth rate which is af- fected greatly by P availability, plant ...
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Determination of N2 and N2O Fixation Rates in Leguminous Plants and Three Different Soil Types by Labeling Experiments with Stable Nitrogen Isotopes
... free-living nitrogen fixing bacteria in forest soils than in grassland soils, which cannot be confirmed by the present experiment, because of similar uptake rates in both ...of carbon and their primary ...
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Adding stable carbon isotopes improves model representationof the role of microbial communities in peatland methanecycling
... DNDC is a process-based model devel- oped to quantify C sequestration as well as the emissions of C and nitrogen (N) gases from terrestrial ecosystems [Li et al., 1992a, 1992b, 2000]. The model has incorporated a ...
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Use of stable nitrogen isotopes and permeable membrane devices to study what factors influence freshwater mollusk survival in the Conasauga River
... water samples collected and analyzed two weeks later. Significant total phosphorus fluxes occurred over the daily sampling events similar to TN (Fig. 5a and b), and there were multiple exceedances of both the 75 μ g/l ...
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Effect of dietary stable isotopic ratios of carbon and nitrogen on the extent of their incorporation into tissues of rats
... heavier isotopes in the digestion and assimilation process [20,21]. Thus, stable isotope analysis is fre- quently used to quantify contributions of different food sources to an animal’s diet and nutrient ...
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Carbon and nitrogen stable isotope ratios can estimate anionic polyacrylamide degradation in soil
... Water-soluble anionic polyacrylamide (PAM) is applied to millions of hectares worldwide as a highly effective erosion-preventing and infiltration-enhancing polymer, when applied at rates of 1 to 2 kg ha − 1 (i.e., 1 to ...
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Long-term carbon and nitrogen dynamics at SPRUCE revealed through stable isotopes in peat profiles
... radio- carbon measurements (Iversen et al., 2014) to link the stable isotope measurements to the 11 000-year history of C and N dynamics at the SPRUCE experimental ...
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Evaluating larval mosquito resource partitioning in western Kenya using stable isotopes of carbon and nitrogen
... Anopheles gambiae G3 strain mosquitoes, obtained from Malaria Research and Reference Reagent Resource Center (http://www.mr4.org), were used in the laboratory experi- ments. Culex quinquefaciatus larvae reared on ...
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Altitudinal gradients of natural abundance of stable isotopes of nitrogen and carbon in the needles and soil of a pine forest in Nepal
... C-isotope (as well as the trend of N-isotope) might be attributed to the lower mineralisation rate and net nitrification rate at the higher altitude. The observed differences in isotopic N- and C-contents of needles and ...
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Stable Isotopes Labeling of Drugs in Pediatric Clinical Pharmacology
... of stable isotopes of a drug is ...several stable isotopes of a drug may create analytic difficulties by increasing problems with overlap and interference by endogenous ...of stable ...
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Stable isotopes as indicators of nitrate attenuation across landscapes
... (~1995- ~2005) (anthropogenic) and pre-industrial times (natural baseline). While in the pre- industrial era BNF was the primary pathway for available N creation (~89% of available N creation per annum), today BNF ...
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Evaluation of stable tungsten isotopes in the resolved resonance region
... Abstract. In the last decade benchmark experiments and simulations, together with newly obtained neutron cross section data, have pointed out deficiencies in evaluated data files of W isotopes. The role of W as a ...
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Stable vanadium isotopes as a redox proxy in magmatic systems
... heavier isotopes. Therefore the possibility of resolving transition metal stable isotope variations in high temperature settings has the potential to define mantle fO 2 more ...
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Using stable isotopes of water to infer wetland hydrological dynamics
... Generally, however, the variation in the isotope data described here illustrates the potential of stable isotopes to clarify hydrological dynamics within a headwater lowland wetland. The combination of a ...
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Spatial distribution of stable water isotopes in alpine snow cover
... the stable water isotopes 18 O and 2 H have been used to determine hydrological pathways and pro- cesses in catchment hydrology (McDonnell, ...used stable isotopes of water to determine ...
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A dynamic study of earthworm feeding ecology using stable isotopes
... All samples (bulked animal and replicate soil samples) were ground to a homogeneous powder using a SPEX liquid nitrogen cooled mill (Glen Creston Ltd., Stanmore, Mid- dlesex, UK) before being weighed using a ...
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