Results 11 to 20 of about 105,676 (166)
View, 2021 All elements with two or more isotopes show natural variation in their isotopic composition as a result of the isotope fractionation that accompanies (bio)chemical reactions and (bio)physical processes.
Frank Vanhaecke +1 more
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Sensors, 2010 We have developed an efficient and compact 3.4 μm difference-frequency-generation spectrometer using a 1.55 μm distributed feedback (DFB) laser diode, a 1.06 μm DFB laser diode, and a ridge-waveguide periodically poled lithium niobate. It is continuously
Hiroyuki Sasada +3 more
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Isotopic Ratio, Isotonic Ratio, Isobaric Ratio and Shannon Information Uncertainty [PDF]
Communications in Theoretical Physics, 2014 The isoscaling and the isobaric yield ratio difference (IBD) probes, which both are constructed by yield ratio of fragment, provide cancelation of parameters. The information entropy theory is introduced to explain the physical meaning of the isoscaling and IBD probes.
Ma, Chun-Wang, Wei, Hui-Ling
openaire +2 more sources
Methods in Ecology and Evolution, 2023 Water temperature is key to the study of aquatic ectotherm ecology, but precise measurements of individual‐based thermal experience remain difficult to validate. The stable isotope composition of oxygen in biominerals acts as a natural thermometer due to
Olivier Morissette +4 more
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Horticulturae, 2023 Viticulture around the world is currently affected by climate change, which is causing an increasing scarcity of water resources necessary for the maintenance of vineyards.
A. Sergio Serrano +6 more
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Precision evaluation of nitrogen isotope ratios by Raman spectrometry
Analytical Science Advances, 2022 We measured Raman spectra of N2 fluids obtained at 0.1–25 MPa at room temperature. The 14N15N peak in the Raman spectrum of a low‐pressure N2 fluid is difficult to detect because of the prevalence of a group of peaks attributed to rotational vibration of
Junji Yamamoto, Yuuki Hagiwara
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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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Correcting the impact of the isotope composition on the mixing ratio dependency of water vapour isotope measurements with cavity ring-down spectrometers [PDF]
Atmospheric Measurement Techniques, 2020 Recent advances in laser spectroscopy enable high-frequency in situ measurements of the isotope composition of water vapour. At low water vapour mixing ratios, however, the measured stable water isotope composition can be substantially affected by a ...
Y. Weng, A. Touzeau, H. Sodemann
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Uso da técnica HRICP-MS na avaliação dos isótopos de boro em eucalipto
Química Nova, 2011 The 10B isotope tracer technique is essential to study the B mobility in plants. Factors that can influence the quality of measured B isotope ratios were optimized experimentally using High Resolution Inductively Coupled Plasma Mass Spectrometry (HRICP ...
Edson Marcio Mattiello +3 more
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Agronomy, 2022 Drought is perhaps the most important abiotic stressor affecting plants. Grapevine (Vitis vinifera L.) is a drought-tolerant species, and this feature makes it a traditional crop in semi-arid climate areas.
A. Sergio Serrano +6 more
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