Results 21 to 30 of about 70,075 (318)

Enhancing Computational Precision for Lattice Boltzmann Schemes in Porous Media Flows

open access: yesComputation, 2016
We reassess a method for increasing the computational accuracy of lattice Boltzmann schemes by a simple transformation of the distribution function originally proposed by Skordos which was found to give a marginal increase in accuracy in the original ...
Farrel Gray, Edo Boek
doaj   +1 more source

Identification and Current Palaeobiological Understanding of “Keratosa”-Type Nonspicular Demosponge Fossils in Carbonates: With a New Example from the Lowermost Triassic, Armenia

open access: yesLife, 2022
Structures similar to fossilized nonspicular demosponges have been reported in carbonates throughout the Phanerozoic and recently in rocks dating back to 890 Ma ago.
Cui Luo   +4 more
doaj   +1 more source

Carbon···Carbon Weak Interactions

open access: yesThe Journal of Physical Chemistry A, 2009
A theoretical study of the complexes formed by systems with electron-deficient and electron-excessive carbon atoms was carried out using DFT and ab initio methods up to the CCSD(T)/aug-cc-pVTZ computational level. Stable complexes with interaction energies between -6.0 and -22.8 kJ mol(-1) were obtained that correspond to weak C...C interactions.
Alkorta, Ibon   +5 more
openaire   +3 more sources

Carbonated Milk [PDF]

open access: yesScience, 1906
n ...
Van Slyke, L. L., Bosworth, A. W.
openaire   +2 more sources

THE GEOLOGICAL SIGNIFICANCE OF MAJSTORSKA CESTA – A HISTORICAL ROAD ON VELEBIT MT. WITH A SPECIAL REVIEW OF JURASSIC CARBONATE ROCKS

open access: yesRudarsko-geološko-naftni Zbornik, 2020
Majstorska Cesta is a historical road along Velebit Mt., NW of Sveti Rok, preserved in its original state since opening in 1832 and therefore added to the cultural heritage list of the Republic of Croatia in 2007.
Ivo Velić, Josipa Velić
doaj   +1 more source

Extended chronologies of aqueous alteration in the CM2 carbonaceous chondrites: evidence from carbonates in Queen Alexandra Range 93005 [PDF]

open access: yes, 2012
The Antarctic CM2 carbonaceous chondrite QUE 93005 contains four compositionally distinct carbonates, namely breunnerite, calcite, dolomite and a Ca-poor dolomite. These carbonates can form monomineralic grains, or may be intergrown as bimineralic grains
Alexander, C.   +4 more
core   +1 more source

Organocatalytic synthesis of vinylene carbonates

open access: yes, 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   +1 more source

Characterization and evaluation of ultra-deep fracture-pore tight sandstone reservoirs: A case study of Cretaceous Bashijiqike Formation in Kelasu tectonic zone in Kuqa foreland basin, Tarim, NW China

open access: yesPetroleum Exploration and Development, 2014
Taking the Cretaceous Basijiqike Formation sandstone reservoirs in the Kuqa foreland basin as an example, this paper studies the characterization and evaluation methods of fracture-pore (fracture-primary pore and fracture-dissolution pore) ultra-deep ...
Huiliang ZHANG   +6 more
doaj   +1 more source

Direct Synthesis of Vinylene Carbonates from Aromatic Aldehydes

open access: yes, 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   +1 more source

Dynamics of snap-off and pore-filling events during two-phase fluid flow in permeable media

open access: yesScientific Reports, 2017
Understanding the pore-scale dynamics of two-phase fluid flow in permeable media is important in many processes such as water infiltration in soils, oil recovery, and geo-sequestration of CO2.
Kamaljit Singh   +6 more
doaj   +1 more source

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