Results 31 to 40 of about 34,873 (245)

Compound specific isotope analysis (CSIA) of phthalates and non-targeted isotope analysis (NTIA) of SPE-extractable organic carbon in dilute aquatic environments

open access: yesEnvironmental Advances, 2021
Isotope ratio analysis of total organic carbon (TOC) is well-established for the study of rivers, lakes, and oceans. Similarly, these aquatic systems are routinely surveyed to quantify natural and anthropogenic organic compounds and pollutants, including
Marcin Fiedziukiewicz, Quentin Hanley
doaj   +1 more source

The ALHAMBRA Survey: Bayesian Photometric Redshifts with 23 bands for 3 squared degrees [PDF]

open access: yes, 2014
The ALHAMBRA (Advance Large Homogeneous Area Medium Band Redshift Astronomical) survey has observed 8 different regions of the sky, including sections of the COSMOS, DEEP2, ELAIS, GOODS-N, SDSS and Groth fields using a new photometric system with 20 ...
Aguerri, J. A. L.   +34 more
core   +3 more sources

Platinum Group Element Traces of CAMP Volcanism Associated With Low‐Latitude Environmental and Biological Disruptions

open access: yesGeophysical Monograph Series, Page 263-304., 2021

Exploring the links between Large Igneous Provinces and dramatic environmental impact

An emerging consensus suggests that Large Igneous Provinces (LIPs) and Silicic LIPs (SLIPs) are a significant driver of dramatic global environmental and biological changes, including mass extinctions.
Jessica H. Whiteside   +3 more
wiley  

+2 more sources

Determination of δ13C of Trace Hydrocarbons in Natural Gas Using Syringe Solid Phase Extraction (SSPE) Coupled with Gas Chromatography/Isotope Ratio Mass Spectrometry (GC/IRMS)

open access: yesGeofluids, 2019
Sample preparation technique, for the analysis of δ13C ratios in oil and gas samples, has gradually been recognized as one of the most crucial steps of the whole analytical process.
Cancan Yan   +7 more
doaj   +1 more source

German crowd-investing platforms: Literature review and survey [PDF]

open access: yes, 2015
This article presents a comprehensive overview of the current German crowd-investing market drawing on a data-set of 31 crowd-investing platforms including the analysis of 265 completed projects. While crowd-investing market still only represents a niche
Andrus, Bogdan-Mihai   +3 more
core   +2 more sources

Isotope ratio mass spectrometry application for environmental investigations [PDF]

open access: yesE3S Web of Conferences, 2019
Stable isotope ratio mass spectrometry (IRMS) is a useful technique with a broad range of applications. Stable isotopes are important indicators of environmental changes (including climate), and can be used to explain the functioning of biogeochemical ...
Simonova Galina, Kalashnikova Daria
doaj   +1 more source

Numerical studies of the two- and three-dimensional gauge glass at low temperature

open access: yes, 2002
We present results from Monte Carlo simulations of the two- and three-dimensional gauge glass at low temperature using the parallel tempering Monte Carlo method. Our results in two dimensions strongly support the transition being at T_c=0.
A. P. Young   +23 more
core   +1 more source

Frequency division multiplexing for interferometric planar Doppler velocimetry [PDF]

open access: yes, 2014
A new method of acquiring simultaneously the signal and reference channels used for interferometric planar Doppler velocimetry is proposed and demonstrated.
Bledowski, Ian A.   +3 more
core   +1 more source

Development of a new method for hydrogen isotope analysis of trace hydrocarbons in natural gas samples

open access: yesJournal of Natural Gas Geoscience, 2016
A new method had been developed for the analysis of hydrogen isotopic composition of trace hydrocarbons in natural gas samples by using solid phase microextraction (SPME) combined with gas chromatography-isotope ratio mass spectrometry (GC/IRMS). In this
Xibin Wang   +6 more
doaj   +1 more source

An Improved Cr-EA-IRMS Method for the Effective Determination of the Hydrogen Isotopes in Coal Samples

open access: yesFrontiers in Chemistry, 2022
Hydrogen isotope analysis of coal is an important tool in the geochemical analysis of coal. The traditional method of hydrogen isotope analysis of coal requires the oxidation of organic matter bound hydrogen in coal to water by an oxidizing agent and ...
Hongwei Li   +3 more
doaj   +1 more source

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