Isotope Analyzer Articles & Analysis
13 articles found
The study of isotopes in soils has become an essential tool in understanding both geological time scales and contemporary environmental processes. By utilizing various isotopes, researchers can glean information about such varied topics as soil formation, nutrient cycling, and past climate conditions. This article focuses on prominent isotopic systems employed in soil studies, including ...
The analysis of archaeological artifacts through isotopic techniques has become a cornerstone of modern archaeological research. These methods allow for the investigation of the origins, movements, and interactions of ancient materials, thereby illuminating the complex relationships between humans and their environments over millennia. By employing various isotopic signatures, researchers can ...
Intact Protein Analysis However, for large molecules such as monoclonal antibodies (mAb) and Fc-Fusion, the isotopic abundance ratio of the mass spectrometer is too wide (~25 Da), so the heterogeneity due to deamidation (+1 Da), oxidation (+16 Da), dehydration (-18 Da), etc. cannot be resolved even with isotopic resolution. ...
Isotopic composition refers to how many different isotopes of an element are present and presented by highlighting the abundance of each isotope in atom percentage (%). This percentage indicates how many atoms in a sample are a specific isotope from all possible atoms in one element. Understanding isotopic ...
Mass Spectrometry Principle: The mass spectrometer can ionize the analyzed sample into charged ions. These ions are separated in space or time under the action of an electric or magnetic field. ...
Chemical and isotopic analyses of groundwater from piezometers localized around a reclaimed landfill were performed in order to identify the boundaries of groundwater contamination zone. Spatial distribution of dissolved inorganic carbon (DIC) concentration and stable carbon isotopes in the groundwater was used to distinguish the piezometers localized within the contaminated aquifer. Background ...
The coastal Sanshandao mine is threatened by the overlying Quaternary water and seawater. Following an introduction to the geology and hydrogeological conditions in the mine area, a detailed hydrogeological survey and sampling were conducted and hydrochemical and stable isotopic (δ2H and δ18O) tests on various waters were carried out to characterize the origin of water in the mine tunnels. ...
Climatic variation, including precipitation amounts and timing, have been linked to abundance and breeding success of many avian species. Less studied but also of significance is the consequence of climatic variability on the exposure and uptake of nutrients and contaminants by wildlife. We examined mercury (Hg) concentrations in nestling wood stork feathers in a coastal setting over a 16‐year ...
Since surface waters are mostly irregular and rare, groundwater in arid and semi–arid regions are submitted to high human constraints enhanced by severe climatic conditions. Multiple isotope analyses and chemical tracing of groundwater from the Essaouira basin (South–Western Morocco) and from the Jeffara basin (South–Eastern Tunisia) reveal that salinisation processes are mainly related to ...
Stable Au nanoparticles (nps) were synthesised in matrix of the self-supported plasticised polymer inclusion anion-exchange membrane using the ion-exchange route for loading AuCl4− anions in membrane and their subsequent reduction with BH4− anions. The compositions of membrane was varied by changing concentration of the anion exchanger, and also using different plasticiser. X-ray ...
Grain and stover yields were measured with grain analyzed for 13C isotopic discrimination () and N concentration. At V-12, 60% shade plants had increased chlorophyll and reduced leaf area and height compared to full sun plants. ...
Received for publication May 4, 2008. Denitrification hotspots in riparian aquifers often develop in a relatively narrow zone at the upland–riparian interface, where nitrate-rich ground water of upland origin interacts with available soil organic carbon. In riparian paddy fields, denitrification in the aquifer has received less attention than that in the surface water and soil. This study aimed ...
Estimation of the isotopic turnover rate in the tissues of organisms allows us to estimate the temporal relationship between the isotope ratio of an organism and its prey, and to analyze seasonal variations of food webs and migratory patterns of animals. We analyzed the isotopic turnover rate in the tissue of ...