Results 11 to 20 of about 86,603 (302)
Fractionation of carbon and oxygen isotopes in 13C-rich Palaeoproterozoic dolostones in the transition from medium-gradegreenschist facies: a case study from the Kola Superdeep Drillhole [PDF]
, 2003 Samples from the Kola Superdeep Drillhole (12 262 m), a deep drillhole (1060 m), and from the surface, seaprated by only around 10 km, provided a unique opportunity for direct tracing of delta(13)C and delta(18)O changes through a low- to high-grade ...
Fallick, A.E. +3 more
core +8 more sources
Late Pleistocene to Middle Holocene record of sedimentation and carbonate content in the Zervynos paleolake-dune complex, Lithuania [PDF]
Estonian Journal of Earth Sciences, 2022 The Late Pleistocene to the Holocene is a time interval that covers the climate transition from a cold to a warm interglacial regime. In the Baltic region, many studies have focused on estimating environmental responses to climatic forcing using ...
Liudas Daumantas +5 more
doaj +3 more sources
Energies, 2022 Understanding the phase behaviour of (CO2 + water + permanent gas) systems is critical for implementing carbon capture and storage (CCS) processes, a key technology in reducing CO2 emissions.
Yolanda Sanchez-Vicente +1 more
doaj +1 more source
Organocatalytic synthesis of vinylene carbonates [PDF]
, 2021 The organocatalytic synthesis of vinylene carbonates from benzoins and acyloins was studied using diphenyl carbonate as a carbonyl source. A range of N-Heterocyclic Carbene (NHC) precursors were screened and it was found that imidazolium salts were the ...
Sébastien, Norsic +5 more
core +2 more sources
Direct Synthesis of Vinylene Carbonates from Aromatic Aldehydes [PDF]
, 2021 Substituted vinylene carbonates were directly prepared from aromatic aldehydes following a one-pot Benzoin condensation / transcarbonation sequence under solvent-free conditions. The combination of a N-phenyl substituted triazolium salt NHC precursor and
Leyli, Ibrahimli +2 more
core +2 more sources
A Combined Model for Kinetic Clumped Isotope Effects in the CaCO3‐DIC‐H2O System
Geochemistry, Geophysics, Geosystems, 2022 Most Earth surface carbonates precipitate out of isotopic equilibrium with their host solution, complicating the use of stable isotopes in paleoenvironment reconstructions. Disequilibrium can arise from exchange reactions in the DIC‐H2O system as well as
James M. Watkins, Laurent S. Devriendt
doaj +1 more source
Crystals, 2022 This manuscript deals with the analysis of significant rare earth elements (REE) minerals such as eudialyte, lorenzenite, loparite, perovskite, titanite, apatite, and carbonates.
Miłosz Huber +3 more
doaj +1 more source
Carbon for soils, not soils for carbon
Global Change Biology, 2023 AbstractThe role of soil organic carbon (SOC) sequestration as a ‘win‐win’ solution to both climate change and food insecurity receives an increasing promotion. The opportunity may be too good to be missed! Yet the tremendous complexity of the two issues at stake calls for a detailed and nuanced examination of any potential solution, no matter how ...
Gabriel Y. K. Moinet +3 more
openaire +5 more sources
Thermo, 2022 Seasonal oscillations in the partial pressure of carbon dioxide (pCO2) in the Earth’s atmosphere, stronger in northern latitudes, are assumed to show that terrestrial photosynthesis exceeds respiration in summer, reducing the pCO2 in air but increasing ...
Ivan R. Kennedy +3 more
doaj +1 more source
Carbon nanofibers based carbon–carbon composite fibers
Discover Nano, 2023 AbstractTextile grade polyacrylonitrile (PAN) was used as a precursor material for carbon fiber preparation. E-beam irradiated polyacrylonitrile grafted carbon nanofibers were dispersed in polyacrylonitrile solution (dissolved in dimethyl formamide).
Nitilaksha Hiremath +6 more
openaire +3 more sources