More Like this

1. Anthropogenic CO 2 accumulation and uptake rates in the Pacific Ocean based on changes in the 13 C/ 12 C of dissolved inorganic carbon: Anthropgoenic 13 C Change Pacific Ocean

   https://doi.org/10.1002/2016GB005460  

   Quay, P. ; Sonnerup, R. ; Munro, D. ; Sweeney, C. ( January 2017 , Global Biogeochemical Cycles)
2. Recombination between 13 C and 2 H to Form Acetylide ( 13 C 2 2 H – ) Probes Nanoscale Interactions in Lipid Bilayers via Dynamic Secondary Ion Mass Spectrometry: Cholesterol and GM 1 Clustering

   https://doi.org/10.1021/acs.analchem.2c01336  

   Grusky, Dashiel S. ; Moss, Frank R. ; Boxer, Steven G. ( July 2022 , Analytical Chemistry)
3. Variation in δ 15 N and δ 13 C values of forages for Arctic caribou: effects of location, phenology and simulated digestion: Variation in δ 15 N and δ 13 C values of forages for Arctic caribou

   https://doi.org/10.1002/rcm.7849  

   Vansomeren, Lindsay L. ; Barboza, Perry S. ; Gustine, David D. ; Syndonia Bret-Harte, M. ( May 2017 , Rapid Communications in Mass Spectrometry)
4. Temperature Cycling Enables Efficient 13 C SABRE-SHEATH Hyperpolarization and Imaging of [1- 13 C]-Pyruvate

   https://doi.org/10.1021/jacs.1c09581  

   TomHon, Patrick ; Abdulmojeed, Mustapha ; Adelabu, Isaiah ; Nantogma, Shiraz ; Kabir, Mohammad Shah ; Lehmkuhl, Sören ; Chekmenev, Eduard Y. ; Theis, Thomas ( January 2022 , Journal of the American Chemical Society)
5. Two-bond 13 C– 13 C spin-coupling constants in saccharides: dependencies on exocyclic hydroxyl group conformation

   https://doi.org/10.1039/d1cp03320d  

   Lin, Jieye ; Meredith, Reagan J. ; Oliver, Allen G. ; Carmichael, Ian ; Serianni, Anthony S. ( October 2021 , Physical Chemistry Chemical Physics)

   Seven doubly 13 C-labeled isotopomers of methyl β- d -glucopyranoside, methyl β- d -xylopyranoside, methyl β- d -galactopyranoside, methyl β- d -galactopyranosyl-(1→4)-β- d -glucopyranoside and methyl β- d -galactopyranosyl-(1→4)-β- d -xylopyranoside were prepared, crystallized, and studied by single-crystal X-ray crystallography and solid-state 13 C NMR spectroscopy to determine experimentally the dependence of 2 J C1,C3 values in aldopyranosyl rings on the C1–C2–O2–H torsion angle, θ 2 , involving the C2 carbon of the C1–C2–C3 coupling pathway. Using X-ray crystal structures to determine θ 2 in crystalline samples and by selecting compounds that exhibit a relatively wide range of θ 2 values in the crystalline state, 2 J C1,C3 values measured in crystalline samples were plotted against θ 2 and the resulting plot compared to that obtained from density functional theory (DFT) calculations. For θ 2 values ranging from ∼90° to ∼240°, very good agreement was observed between the experimental and theoretical plots, providing strong validation of DFT-calculated spin-coupling dependencies on exocyclic C–O bond conformation involving the central carbon of geminal C–C–C coupling pathways. These findings provide new experimental evidence supporting the use of 2 J CCC values as non-conventional spin-coupling constraints in MA′AT conformational modeling of saccharides in solution, and the use of NMR spin-couplings not involving coupled hydroxyl hydrogens as indirect probes of C–O bond conformation. Solvomorphism was observed in crystalline βGal-(1→4)-βGlcOCH 3 wherein the previously-reported methanol solvate form was found to spontaneously convert to a monohydrate upon air-drying, leading to small but discernible conformational changes in, and a new crystalline form of, this disaccharide. 

   more » « less