Results 21 to 30 of about 57,188 (237)
Measurement and validation of uranium isotope ratio in uranium ore for isotopic fingerprinting
Radiation Protection and Environment, 2017 Accurate determination of uranium isotope ratio can act as an efficient fingerprint in the nuclear forensics to identify source and intended use of illicit trafficking of uranium material. In this context, a rapid chemical separation technique to isolate
Suchismita Mishra +3 more
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Method for the determination of concentration and stable carbon isotope ratios of atmospheric phenols [PDF]
Atmospheric Measurement Techniques, 2013 A method for the determination of the stable carbon isotopic composition of atmospheric nitrophenols in the gas and particulate phases is presented. It has been proposed to use the combination of concentration and isotope ratio measurements of precursor ...
M. Saccon +7 more
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Nitrogen isotopic analyses by isotope-ratio-monitoring gas chromatography / mass spectrometry [PDF]
Journal of the American Society for Mass Spectrometry, 1994 Amino acids containing natural-abundance levels of 15N were derivatized and analyzed isotopically using a technique in which individual compounds are separated by gas chromatography, combusted on-line, and the product stream sent directly to an isotope-ratio mass spectrometer. For samples of N2 gas, standard deviations of ratio measurement were better
Merritt, Dawn A., Hayes, J.M.
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Emerging techniques in vegetable oil analysis using stable isotope ratio mass spectrometry
Grasas y Aceites, 2002 As the practice of vegetable oil adulteration becomes more sophisticated, the possibility to subvert detection using established techniques such as capillary gas chromatography is increasing.
Simon D. Kelly, Christopher Rhodes
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Pyrolysis-gas chromatography–isotope ratio mass spectrometry of polyethylene [PDF]
Journal of Chromatography A, 2015 Polyethylene is probably the most used plastic material in daily life and its accurate analysis is of importance. In this communication the chemical structure of polyethylenes is studied in detail using conventional analytical pyrolysis (Py-GC/MS), bulk stable isotopic analysis (IRMS) and pyrolysis compound specific stable isotopic analysis (Py-CSIA ...
González-Pérez, José Antonio +4 more
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Rhabdomyosarcoma in children in the light of isotope ratio mass spectrometry
Polish Journal of Pathology, 2015 Rhabdomyosarcoma is the third most common solid tumor in children and the most common soft tissue sarcoma in this age group. However, 5-year survival is only observed in approximately 70% of cases, and the prognosis for patients with progressive disease is still poor.
Katarzyna, Taran +4 more
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Frontiers in PhysiologyPurposeThe Alaska Mountain Wilderness Ski Classic (AMWSC) is a self-supported and self-oriented winter expedition that occurs in the remote North American Brooks Range, ∼200 km north of the Arctic Circle.
Melynda S. Coker +6 more
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A New Method for Silicon Triple Isotope Analysis With Application to Siliceous Sponge Spicules
Geochemistry, Geophysics, Geosystems, 2023 Multiple isotope ratios of elements disclose information on the fractionation mechanism that cannot be obtained from a single isotope ratio alone.
Andreas Pack +3 more
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eFood, 2021 The zero-added exogenous monosodium glutamate (MSG) soy sauce market is developing rapidly, but its authenticity remains a challenge for the industry. In this study, carbon stable isotope ratio mass spectrometry was utilized to determine 13C/12C ratio ...
Jianbo Xiao, Mingfu Wang, Jian-Lin Wu
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Scientific Reports, 2020 The high growth rate of Ulva seaweeds makes it a potential algal biomass resource. In particular, Ulva meridionalis grows up to fourfold a day. Here, we demonstrated strong carbon fixation by U.
Shuntaro Tsubaki +4 more
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