Results 41 to 50 of about 612,314 (336)

Authenticity testing of organically grown vegetables by stable isotope ratio analysis of oxygen in plant-derived sulphate.

open access: yesFood Chemistry, 2019
Analytical methods for authenticity testing of organically grown vegetables are urgently needed. Here we present a novel method for organic authentication based on stable isotope ratio analysis of oxygen in plant-derived sulphate. We combined this method
Vlastimil Novak   +4 more
semanticscholar   +1 more source

mzMatch-ISO: an R tool for the annotation and relative quantification of isotope-labelled mass spectrometry data [PDF]

open access: yes, 2013
<p>Motivation: Stable isotope-labelling experiments have recently gained increasing popularity in metabolomics studies, providing unique insights into the dynamics of metabolic fluxes, beyond the steady-state information gathered by routine mass ...
Achuthanunni Chokkathukalam   +21 more
core   +5 more sources

Illuminating hydrological processes at the soil-vegetation-atmosphere interface with water stable isotopes [PDF]

open access: yes, 2016
Funded by DFG research project “From Catchments as Organised Systems to Models based on Functional Units” (FOR 1Peer reviewedPublisher PDFPublisher ...
Adomako   +287 more
core   +1 more source

Multimedia distributions, bioaccumulation, and trophic transfer of microcystins in the Geum River Estuary, Korea: Application of compound-specific isotope analysis of amino acids [PDF]

open access: yes, 2019
To determine distributions, bioaccumulation, and trophic transfer of freshwater cyanobacterial toxins such as microcystins (MCs), surface water, suspended solids, sediments, and coastal organisms were collected from seven stations in inner and outer ...
신경훈
core   +1 more source

Influence of palaeoweathering on trace metal concentrations and environmental proxies in black shales [PDF]

open access: yes, 2017
The mineralogical and chemical compositions of Lower Carboniferous (Tournaisian) marine black shale from the Kowala quarry, the Holy Cross Mountains, Poland, were investigated.
Agnieszka Pisarzowska   +128 more
core   +1 more source

Highlighting the effects of co‐eluting interferences on compound specific stable isotope analysis of polycyclic aromatic hydrocarbons using comprehensive two‐dimensional gas chromatography [PDF]

open access: yes, 2014
Accuracy is the most important issue when carrying out compound specific stable isotope analysis of polycyclic aromatic hydrocarbons extracted from complex samples.
Blessing   +16 more
core   +1 more source

An analytical system for stable isotope analysis on carbon monoxide using continuous-flow isotope-ratio mass spectrometry [PDF]

open access: yesAtmospheric Measurement Techniques, 2015
A fully automated system for the determination of δ13C and δ18O in atmospheric CO has been developed. CO is extracted from an air sample and converted into carbon dioxide (CO2) using the Schütze reagent.
S. L. Pathirana   +3 more
doaj   +1 more source

Ontogenetic Growth Changes in Mercury and Stable Isotope Ratios of Carbon, Nitrogen, and Oxygen in Male and Female Dalli-Type Dall’s Porpoises (Phocoenoides dalli) Stranded in Hokkaido, Japan

open access: yesJournal of Marine Science and Engineering
We investigated the ontogenetic growth changes in total mercury (THg) concentrations, δ13C, δ15N, and δ18O values, and body length (BL) of dalli-type Dall’s porpoises.
Tetsuya Endo   +5 more
doaj   +1 more source

Stable Carbon Isotope Ratio (δ13C) Measurement of Graphite Using EA-IRMS System

open access: yesMedžiagotyra, 2015
δ13C values in non-irradiated natural graphite were measured. The measurements were carried out using an elemental analyzer combined with stable isotope ratio mass spectrometer (EA-IRMS). The samples were prepared with ground and non-ground graphite, the
Andrius Garbaras   +2 more
doaj   +1 more source

Seasonal trends of the stable nitrogen isotope ratio in particulate nitrogen compounds and their gaseous precursors in Akita, Japan

open access: yesTellus: Series B, Chemical and Physical Meteorology, 2019
Particulate matter (PM) can have adverse effects on human health. Moreover, because the mechanisms of PM formation and behavior in the atmosphere are notably complicated, to reduce PM concentrations effectively and meet environmental standards, source ...
Hiroto Kawashima
doaj   +1 more source

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