Results 21 to 30 of about 78,627 (266)
ISOTOPIC MASS SPECTROMETRY OF THE ELEMENTS [PDF]
, 1963 The Analytical Mass Spectrometry Section at Oak Ridge National Laboratory has, for many years, been determining relative isotopic abundances from solid samples. Thus, useful analytical mass spectrometer experience with every pertinent element has been obtained.
Spitzer, E.J., Sites, J.R., comps.
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Frontiers in Environmental ChemistryLong-lived radionuclides in our environment provide important information on natural and anthropogenic processes. Their presence and concentration reflect the balance of production and decay.
Sebastian Fichter +7 more
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Yankuang ceshi, 2021 BACKGROUND Before analyzing the carbon isotopes of n-alkanes by gas chromatography-gas isotope mass spectrometry (GC-IRMS), it is necessary to pre-separate and enrich n-alkanes and isoparaffins in saturated hydrocarbon samples. Whether the carbon isotope
DONG Hao-wei +6 more
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Multiple Isotopic Labels for Quantitative Mass Spectrometry [PDF]
Analytical Chemistry, 2008 Quantitative mass spectrometry is often performed using isotopically labeled samples. Although the 4-trimethylammoniumbutyryl (TMAB) labels have many advantages over other isotopic tags, only two forms have previously been synthesized (i.e., a heavy form containing nine deuteriums and a light form without deuterium).
Cain, Morano +2 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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Yankuang ceshi, 2020 BACKGROUND The conventional method for the measurement of sulfur isotopes in sulfate includes mainly barite conversion coupled with dual-inlet SO2 methods. These methods are facile and reliable.
GAO Jian-fei +4 more
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The use of nitrogen-15 in microbial natural product discovery and biosynthetic characterization
Frontiers in Microbiology, 2023 This mini-review covers the use of nitrogen-15 in bacterial and fungal natural product discovery and biosynthetic characterization from 1970 to 2022. Nitrogen is an important element in a number of bioactive and structurally intriguing natural products ...
Kalindi D. Morgan
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Protein pyrophosphorylation by inositol pyrophosphates — detection, function, and regulation
FEBS Letters, EarlyView.Protein pyrophosphorylation is an unusual signaling mechanism that was discovered two decades ago. It can be driven by inositol pyrophosphate messengers and influences various cellular processes. Herein, we summarize the research progress and challenges of this field, covering pathways found to be regulated by this posttranslational modification as ...
Sarah Lampe +3 more
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A cosmogenic 10Be anomaly during the late Miocene as independent time marker for marine archives
Nature CommunicationsCosmogenic nuclide dating relies on the constancy of production and incorporation of radionuclides in geological archives. Anomalous deviations from constancy during the Holocene or Pleistocene are frequently used as global benchmarks to harmonize ...
Dominik Koll +9 more
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Isotope Mass Spectrometry in Meat Identification
Техника и технология пищевых производствMeat and meat products are consumed by a large proportion of the population. As a result, food scientists keep inventing new methods for meat identification, e.g., isotope mass spectrometry.
Lisitsyn Andrey +5 more
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