Results 11 to 20 of about 130,022 (84)
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
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Isotopes in pyrogenic carbon: a review [PDF]
Organic Geochemistry, 2012 Pyrogenic carbon (PC; also known as biochar, charcoal, black carbon and soot) derived from natural and anthropogenic burning plays a major, but poorly quantified, role in the global carbon cycle.
Aguilera +155 more
core +4 more sources
The Emergence of Carbon Isotope Exchange [PDF]
Angewandte Chemie International Edition, 2019 Significant progress in C-C bond activation with transition metals has recently enabled the development of several carbon isotope exchange reactions. These methods are based on C-C bond decarboxylative carboxylation reactions in the presence of selected transition metals and labelled carbon monoxide or carbon dioxide.
Hinsinger, Karen, Pieters, Gregory
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Carbon isotopic fractionation in molecular clouds [PDF]
Astronomy & Astrophysics, 2020 Context. Carbon fractionation has been studied from a theoretical point of view with different models of time-dependent chemistry, including both isotope-selective photodissociation and low-temperature isotopic exchange reactions. Aims. Recent chemical models predict that isotopic exchange reactions may lead to a depletion of 13C in nitrile-bearing ...
Francesco Fontani +5 more
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Carbon Isotopes Near Drip Lines in the Relativistic Mean-Field Theory [PDF]
, 1998 We have investigated the ground-state properties of carbon isotopes in the framework of the relativistic mean-field (RMF) theory. RMF calculations have been performed with the non-linear scalar self-coupling of the $\sigma$ meson using an axially ...
A. Mueller +35 more
core +5 more sources
Carbon Isotopic Chemistry [PDF]
Symposium - International Astronomical Union, 1992 Isotopic molecular abundances are used to interpret Galactic chemical evolution and the properties of interstellar clouds. The isotopic chemistry of carbon plays an important role in the interpretation of these measurements. This paper reviews the recent measurements of the carbon twelve to thirteen ratio across the Galaxy and the isotopic chemistry.
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Modern Strategies for Carbon Isotope Exchange
Angewandte Chemie, 2023 AbstractIn contrast to stable and natural abundant carbon‐12, the synthesis of organic molecules with carbon (radio)isotopes must be conceived and optimized in order to navigate through the hurdles of radiochemical requirements, such as high costs of the starting materials, harsh conditions and radioactive waste generation.
Alexandre Labiche +4 more
openaire +4 more sources
Carbon isotopic characterisation of dissolved organic mater during water treatment [PDF]
, 2014 Water treatment is a series of physio-chemical processes to aid organic matter (OM) removal, which helps to minimise the formation of potentially carcinogenic disinfection by-products and microbial regrowth.
Baker, Aandy +3 more
core +2 more sources
Isotopic Production Cross Sections in Proton-Nucleus Collisions at 200 MeV [PDF]
, 2006 Intermediate mass fragments (IMF) from the interaction of $^{27}$Al, $^{59}$Co and $^{197}$Au with 200 MeV protons were measured in an angular range from 20 degree to 120 degree in the laboratory system.
Aschman, D. G. +12 more
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Stable isotope values in modern bryozoan carbonate from New Zealand and implications for paleoenvironmental interpretation [PDF]
, 2004 Bryozoan carbonate contains useful geochemical evidence of temperate shelf paleoenvironments. Stable isotope values were determined for 103 modern marine bryozoan skeletons representing 30 species from New Zealand. δ18O values range from -1.4 to 2.8 VPDB,
Anderson T. F. +10 more
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