Poster Annual Meeting Stable Isotope Spectrometry Users Group (SIMSUG), Bristol, UK, 14-16 April 2003. (rothamsted.ac.uk)
Bioaccumulation of pharmaceuticals and stimulants in macrobenthic food web in the European Arctic as determined using stable isotope approach. (uliege.be)
The Stable Isotope Ecology Laboratory of the Center for Applied Isotope Studies at the University of Georgia , offers a wide variety of analytical services to researchers associated with any bona-fide nonprofit research organization. (uga.edu)
Most elements of biological interest (including C, H, O, N, and S) have two or more stable isotopes, with the lightest of these present in much greater abundance than the others. (uga.edu)
Among stable isotopes the most useful as biological tracers are the heavy isotopes of carbon and nitrogen. (uga.edu)
We can analyze any parts of plants for nitrogen and carbon stable isotopes and total content. (uga.edu)
We analyze all types of soils for nitrogen and carbon stable isotopes and total content. (uga.edu)
Stable isotope and geochemical techniques have been used in groundwater studies of coastal aquifers worldwide [ 22 - 25 ] for determining the origins of groundwater salinization in aquifers and processes that affect water chemistry, such as rock weathering, evaporation, atmospheric precipitation, and cation exchange. (hindawi.com)
Consequently, studying stable isotope and geochemical techniques can significantly improve our understanding of groundwater hydrodynamical processes and chemical evolution [ 26 ]. (hindawi.com)
Groundwater1
The major ion hydrochemistry and environmental isotope composition ( δ 18 O, δ 2 H) were investigated to identify the recharge sources and processes that affect the groundwater salinization. (hindawi.com)
Mineralogy1
Reviews in Mineralogy and Geochemistry (2022) 88 (1): 167-189. (geoscienceworld.org)
Geochemical1
In addition to population and community changes, morphological and geochemical changes can also be detected in the ostracod carapace, which serves as a tracer of the water quality. (springer.com)
Radioactive2
Because of the specificity of its uptake by the human body, radioactive isotopes of iodine can also be used to treat thyroid cancer . (wikipedia.org)
Each has a heavy isotope ( 13 C and 15 N) with a natural abundance of ~1% or less and a light isotope ( l2 C and 14 N) that makes up all of the remainder, in the case of nitrogen, or virtually all in the case of carbon (carbon also has a radioactive isotope, 14 C. (uga.edu)
Aquifer1
Furthermore, understanding the SW-GW interactions through available methods (seepage meter, heat tracer, and environmental tracer) is useful in watershed management, that is, risk management and assessment of the aquifer system. (intechopen.com)
Mantle1
What is the real S isotope composition of Earth's mantle? (edu.au)
Environmental1
This review attempts to analyse the potential of ostracods as environmental tracers in recent freshwater ecosystems. (springer.com)
Atom2
For the most common isotope of hydrogen (symbol 1H) each atom has one proton, one electron, and no neutrons. (wikipedia.org)
Medical tracer studies of human physiology are most often reported in units of atom percent excess (APE). (uga.edu)
Studies1
We offer pre-isotope analysis lipid and urea extraction for diet and tracer studies. (uga.edu)
Fractionation2
The two isotopes are susceptible to separation (i.e., fractionation) in several natural processes including mineral formation (chemical precipitation), cation substitution (lithium substitutes for Mg and Fe in octahedral sites in micas and clay minerals, where 6Li is preferentially hosted over 7Li) and rock alteration, due to their relatively large difference in mass. (docslib.org)
The Cd concentrations of the growth solutions thereby had no significant impact on Zn isotope fractionation during root-to-shoot translocation. (imperial.ac.uk)
Atmos2
Xu, H., U. Tsunogai, F. Nakagawa , K. Sato, and H. Tanimoto (2022) Diagnosing the stratospheric proportion in tropospheric ozone using triple oxygen isotopes as tracers, Atmos. (nagoya-u.ac.jp)
Tanoue, M., H. Yashiro, Y. Takano, K. Yoshimura, C. Kodama, M. Satoh, Modelling water isotopes using a global non-hydrostatic model with explicit convection scheme : Comparison with a gridded dataset and site observations, submitted to JGR-Atmos. (u-tokyo.ac.jp)
Compositions5
H, O, B) isotope compositions, allows distinguishing the effects of different processes when dealing with environmental and volcanological studies and provides important clues on Earth's genesis , magma reservoirs and their dynamics. (docslib.org)
Based on their radiogenic isotope, major and trace element compositions, several geochemically-extreme mantle compositions are suggested to host components of recycled crust. (hal.science)
This study presents a new method for the determination of mass-dependent Te isotope compositions. (imperial.ac.uk)
Isotope mass balance and mixing equations performed in this study show that hypothetical mass-independent Te isotope effects of reasonable magnitude are unlikely to have a significant impact on the measured mass-dependent Te isotope compositions at the current level of analytical precision. (imperial.ac.uk)
To this end, the Cd and Zn isotope compositions of root, stem, leaf, and xylem sap samples were determined during metal uptake and translocation at different Cd and Zn concentrations. (imperial.ac.uk)
Composition5
The isotope composition (6Li/7Li) expressed in terms of δ7Li has been determined in dynamic and static mode for comparative purposes, by using two different types of thermal ionization mass spectrometers . (docslib.org)
Finally, this study presents the first precise mass-dependent Te isotope composition obtained for an iron meteorite, Canyon Diablo, and komatiite reference material KAL-1 using the double spike technique. (imperial.ac.uk)
By using a multivariable approach accounting for watershed characteristics and stream chemistry, USGS researchers were able to link the Hg isotope composition in fish to Hg sources in the northeastern U.S. (speciation.net)
By using a multivariable approach including watershed characteristics and stream chemistry parameters, the researchers were able to link the Hg isotope composition in fish to current and historic Hg sources and demonstrated that the approach is able to trace bioaccumulated mercury. (speciation.net)
Tanoue, M., K. Ichiyanagi, K. Yoshimura, J. Shimada, and Y. Hirabayashi, Estimation of the isotopic composition and origins of winter precipitation over Japan using a regional isotope circulation model, J. Geophys. (u-tokyo.ac.jp)
Oxygen2
Sambuichi, T., U. Tsunogai, M. Ito, F. Nakagawa (2023) First measurements on triple oxygen isotopes of dissolved inorganic phosphate in hydrosphere. (nagoya-u.ac.jp)
Inoue, T., F. Nakagawa , H. Shibata, U. Tsunogai (2021) Vertical changes in the flux of atmospheric nitrate from a forest canopy to surface soil using triple oxygen isotopes as tracers. (nagoya-u.ac.jp)
Mass-dependent2
This allows for precise (2SD = 0.07‰) determination of the mass-dependent 130Te/125Te isotope ratio using analyte solutions containing as little as 6 ng of natural Te. (imperial.ac.uk)
The researchers found that mass-dependent isotopes (δ202Hg) in prey and game fish were depleted at forested sites in comparison to urban-industrial settings. (speciation.net)
Isotopic3
Abstract: The low temperature realm such as the geothermal systems, characterized by a large variety of near-Earth surface processes, has been the object of several isotopic studies, some of them including lithium isotopes. (docslib.org)
This research is based on the use of chemical and isotopic data, whereas it does not include lithium isotopes. (docslib.org)
While fish isotopes were correlated with those in bed sediments, an isotopic offset between the two matrices was variable because of ecosystem-specific drivers controlling the formation of methylmercury and thereby bioaccumulation. (speciation.net)
Signatures1
The Hg isotope signatures in fish was strongly related to in-stream and watershed land-use indicator variables. (speciation.net)
Ratio1
A pilot study has been performed for the determination of lithium-isotope ratio by thermal ionization mass spectrometry (TIMS), a technique poorly employed with respect to other methods such as inductively coupled plasma mass spectrometry, being more time consuming. (docslib.org)
Metals1
A systematic enrichment of heavy Cd and light Zn isotopes was found in root-to-shoot translocation of the metals. (imperial.ac.uk)
Processes2
However, much work can still be done to systematically use lithium as tracer of geochemical processes in deep and shallow Earth reservoirs. (docslib.org)
In this case, one isotope is transported more rapidly than another in processes such as evaporation or diffusion along a chemical potential gradient. (docslib.org)
Sources1
A group of researchers from the US Geological Survey now utilized the mercury isotope distribution to relate sources of Hg to co-located fish and bed sediments from 23 streams in the northeastern U.S.. While the use of mercury isotope distribution as a source tracer has been used before, it is difficult to apply such approach across multiple waterbodies that contain diverse land cover as well as mercury sources. (speciation.net)
Water1
Kino, K., A. Cauquoin, A. Okazaki, T. Oki, K. Yoshimura, Heavy Water Isotope Precipitation in Inland East Antarctica Accompanied by Strong Southern Westerly Winds during the Last Glacial Maximum, submitted to GRL. (u-tokyo.ac.jp)
Reference1
This inter-laboratory cross-calibration is highly advantageous, as a well-calibrated isotope reference material is not yet available for Te. (imperial.ac.uk)