Results 1 to 10 of about 105,676 (166)
Isotope ratio dual-comb spectrometer
Physical Review Research, 2022 We demonstrate the use of dual-comb spectroscopy for isotope ratio measurements. We show that the analysis spectral range of a free-running near-infrared dual-comb spectrometer can be extended to the midinfrared by difference frequency generation to ...
Alexandre Parriaux +4 more
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Energy expenditure and weight-related behaviors in youth with Down syndrome: a protocol
Frontiers in Pediatrics, 2023 BackgroundThe consequences of obesity are ominous, yet healthcare professionals are not adequately preventing or treating obesity in youth with Down syndrome (DS).
Michele Polfuss +14 more
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Absolute isotope ratios defining isotope scales used in isotope ratio mass spectrometers and optical isotope instruments [PDF]
Rapid Communications in Mass Spectrometry, 2020 Rationale The isotope delta is calculated from the isotope ratio of a sample and the absolute isotope ratio of the zero reference point defining each stable isotope international scale ( R std ). Therefore,
Grzegorz Skrzypek, Philip J. H. Dunn
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Proceedings, 2023 Forests in Latvia are crucial, covering over half of the country’s territory and expanding continuously through afforestation and natural growth [...]
Maris Bertins +11 more
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Frontiers in Medicine, 2021 Endotoxemia induced in vivo in mice by intraperitoneal injection of lipopolysaccharide (LPS) leads to (neuro)inflammation and sepsis. Also the homeostasis of mineral elements can be altered through mechanisms that still are poorly understood.
Rosa Grigoryan +5 more
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Interstellar nitrogen isotope ratios [PDF]
Symposium - International Astronomical Union, 1985 We report first results of a systematic study of the galactic interstellar nitrogen isotope ratios, based upon measurements of the (J,K) = (1,1) and (2,2) lines of the 14NH3 and 15NH3 molecules. We find significant deviations of the [14N]/[15N3] abundance ratio from the solar-system value (~270), with the most extreme enrichment in the galactic-center ...
R. Güsten, H. Ungerechts
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Data in Brief, 2021 The data presented in this work summarize the results of Eu isotope ratio of NIST3117a standard reagent collected between December 2017 and July 2020, which were used standard isotope ratio for calculating delta notation of Eu isotope ratio in the ...
Seung-Gu Lee, Tsuyoshi Tanaka
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Geographical Origin Authentication of Agri-Food Products: A Review
Foods, 2020 This study is a systematic literature review of geographical origin authentication by elemental analytical techniques. Authentication and certification of geographic origin of agri-food products is a useful tool toward the protection of the quality for ...
Katerina Katerinopoulou +4 more
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环境与职业医学, 2022 backgroundThe lead isotope ratios (LIR) differ among different sourced samples. Previous domestic and oversea studies on source tracing by LIR in human blood or urine mainly focused on the comparison of blood or urine samples from the same or different ...
Jieyan CAI +8 more
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Differentiation Among Romanian Wine Regions Based on Lead Isotope Signatures
Bulletin of University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca: Horticulture, 2019 The objective of this study is to determine the Pb concentration and 206Pb/204Pb, 206Pb/207Pb, 206Pb/208Pb from several Romanian winemaking regions, in order to highlight credible geographical markers of wine origin.
Florin Dumitru BORA +3 more
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