Results 1 to 10 of about 173,935 (289)
Exotic Structure of Carbon Isotopes [PDF]
Frontiers of Collective Motions, 2002 We studied firstly the ground state properties of C-isotopes using a deformed Hartree-Fock (HF)+ BCS model with Skyrme interactions. Shallow deformation minima are found in several neutron$-$rich C-isotopes.
Hagino, Kouichi +2 more
core +4 more sources
Carbon and Nitrogen Stable Isotopic Discrimination Factors Between Diet and Feces in Wild Giant Pandas [PDF]
BiologyStable isotope analysis is very useful for studying animal nutritional ecology. Feces are the most accessible and non-invasive samples for short-term dietary reconstruction.
Guoyan Long +4 more
doaj +2 more sources
Isotope Mass Spectrometry as a Tool for Identifying Organic Tomatoes (Solanum lycopersicum L.)
Техника и технология пищевых производств, 2023 Tomatoes (Solanum lycopersicum L.) are one of the most popular vegetables in the world. These days, Russian consumers prefer tomatoes labeled as organic. However, the agricultural industry often lacks instrumental methods to confirm the organic status of
Lev A. Oganesyants +5 more
doaj +1 more source
Shiyou shiyan dizhi, 2023 As an important technological measure to uncover complex sedimentary-diagenetic process, microzone in situ geochemical analysis has drawn more and more attention along with improving analytical and test levels.
Jun HAN +4 more
doaj +1 more source
Isotope Engineering of Carbon Nanotube Systems [PDF]
Physical Review Letters, 2005 4 pages, 4 ...
Simon, F. +7 more
openaire +3 more sources
Journal of Isotopes, 2022 Ethanol is a feasible medium for diffusion separation of carbon isotopes. In order to obtain the separation coefficient of gas diffusion separation of ethanol, the application of elemental analysis isotope ratio mass spectrometry (EA-IRMS) to measure the
WANG Fei;PAN Jianxiong;ZHOU Mingsheng;JIANG Dongjun;LI Junjie
doaj +1 more source
Sedimentary pyrite sulfur isotopes track the local dynamics of the Peruvian oxygen minimum zone
Nature Communications, 2021 To explore the importance of local vs. global sulfur-cycle controls on variations in pyrite sulfur isotopes, the authors couple carbon-nitrogen-sulfur concentrations and stable isotopes of sediments from the Peruvian oxygen minimum zone, identifying a ...
Virgil Pasquier +2 more
doaj +1 more source
Carbon Isotopic Measurements of Nanotubes to Differentiate Carbon Sources [PDF]
ACS Omega, 2019 Stable carbon isotope (δ(13C)) analysis can provide information concerning the starting materials and the production process of a material. Carbon nanotubes (CNTs) are produced using a variety of starting materials, catalysts, and production methods.
Chartrand, Michelle M. G. +3 more
openaire +3 more sources
Energy Exploration & Exploitation, 2023 C 5 –C 7 light hydrocarbons are important components in petroleum and are extensively employed as an auxiliary approach in petroleum research. Consensus on the mechanism of light hydrocarbon generation has not yet been achieved.
Chen Zhang +5 more
doaj +1 more source
Laser ablation molecular isotopic spectrometry of carbon isotopes [PDF]
Spectrochimica Acta Part B: Atomic Spectroscopy, 2015 Abstract Quantitative determination of carbon isotopes using Laser Ablation Molecular Isotopic Spectrometry (LAMIS) is described. Optical emission of diatomic molecules CN and C2 is used in these measurements. Two quantification approaches are presented: empirical calibration of spectra using a set of reference standards and numerical fitting of a ...
Bol′shakov, Alexander A. +4 more
openaire +1 more source