Results 31 to 40 of about 70,075 (318)

Influence of Lithofacies and Diagenetic Processes on the Physical and Mechanical Properties of Carbonate Rocks - Case Study from Sinawin-Sha'wa Area, Libya

Rudarsko-geološko-naftni Zbornik, 2015
Geological investigations were carried out in the Sinawin-Sha'wa area, in northwestern Libya, in order to find suitable rocks for aggregate in asphalt mixtures for Nalut - Ghadamis Road reconstruction.
Uroš Barudžija, Ana Maričić, Vlatko Brčić   +2 more
doaj   +1 more source

Chemostratigraphy of Neoproterozoic carbonates: implications for 'blind dating' [PDF]

, 2001
The delta C-13(carb) and Sr-87/Sr-86 secular variations in Neoproteozoic seawater have been used for the purpose of 'isotope stratigraphy' but there are a number of problems that can preclude its routine use.
Gorokhov, I.M., Fallick, A.E., Anthony E. Fallick, Fallick, A, Igor M. Gorokhov, Kuznetsov, A.B., Victor A. Melezhik, Melezhik, V.A., Anton B. Kuznetsov   +8 more
core   +1 more source

A carbon–carbon hybrid – immobilizing carbon nanodots onto carbon nanotubes

Chemical Science, 2015
The thrust of this work is to integrate small and uniformly sized carbon nanodots (CNDs) with single-walled carbon nanotubes of different diameters as electron acceptors and electron donors, respectively, and to test their synergetic interactions in terms of optoelectronic devices.
Volker Strauss, Johannes T. Margraf, Timothy Clark, Dirk M. Guldi   +3 more
openaire   +5 more sources

Determination of carbon-carbon connectivities, assignment of quaternary carbons, and extraction of carbon-carbon coupling constants by carbon-relayed hydrogen-carbon spectroscopy

Journal of Magnetic Resonance (1969), 1985
Nowadays many possibilities exist to elucidate carbon-carbon connectivity. In hydrogen-bearing carbon systems C-C connectivities can be traced out most conveniently in an indirect way by a combination of H-H COSY (I) and H-C CQSY (2). In case of overlapping ‘proton signals ambiguities can be removed by heteronuclear relayed spectroscopy (3) and ...
Kessler, Horst, Bermel, W., Griesinger, Christian   +2 more
openaire   +2 more sources

Identification du rythme annuel de précipitation des carbonates pariétaux pour un calage micro-chronologique des occupations archéologiques pyrogéniques : cas de la Grotte Mandrin (Malataverne, Drôme, France)

BSGF - Earth Sciences Bulletin, 2021
Dans les abris-sous-roche et grottes, la lecture géoarchéologique des sédiments peut permettre, dans des cas favorables, une étude micro-chronologique des traces d’activités anthropiques et en particulier de l’usage du feu.
Vandevelde Ségolène, Lacour Jean-Luc, Quéré Céline, Marie Lionel, Petit Christophe, Slimak Ludovic   +5 more
doaj   +1 more source

Remote Sensing Analysis of Recent Carbonate Platforms, East of Sabah: Potential Analogues for Miocene Carbonate Platforms of the South China Sea

Indonesian Journal on Geoscience, 2014
DOI: 10.17014/ijog.v7i3.141Recent carbonate platforms may provide useful analogues for fossil platforms and reefs, and could allow the generation of quantitative tools for the prediction of facies distribution, reservoir volumes, and reservoir quality ...
Aicha Chalabi, B. Pierson, Jasmi Ab Talib   +2 more
doaj   +1 more source

Carbon Emission Reduction—Carbon Tax, Carbon Trading, and Carbon Offset [PDF]

Energies, 2020
The Paris Agreement was signed by 195 nations in December 2015 to strengthen the global response to the threat of climate change following the 1992 United Nations Framework Convention on Climate Change (UNFCC) and the 1997 Kyoto Protocol [...]
openaire   +2 more sources

Leaching kinetic of copper oxide ore containing carbonate gangue in the acid condition

工程科学学报, 2016
This article is focused on the leaching kinetic of copper oxide ore containing carbonate gangue.The effects of temperature,acid concentration,particle size,liquid-to-solid ratio and stirring rate on leaching of the copper oxide ore were determined.The ...
WU Ai-xiang, HU Kai-jian, WANG Yi-ming, WANG Shao-yong, XU Heng   +4 more
doaj   +1 more source

Discriminating cool-water from warm-water carbonates and their diagenetic environments using element geochemistry: the Oligocene Tikorangi Formation (Taranaki Basin) and the dolomite effect

, 2004
Fields portrayed within bivariate element plots have been used to distinguish between carbonates formed in warm- (tropical) water and cool- (temperate) water depositional settings.
Nelson, Campbell S., Hood, Steven D., Campbell S. Nelson, Kamp, Peter J.J., Steven D. Hood, Peter J. J. Kamp   +5 more
core   +1 more source

Construction of Hierarchical Porous Polycyanurate Networks with Cobaltoporphyrin for CO₂ Adsorption and Efficient Conversion to Cyclic Di- and Tri-Carbonates

, 2022
A new porphyrin-based cyanate monomer 5,10,15,20-tetrakis­(4-cyanatophenyl)-porphyrin (TCP) was synthesized, from which a porous polycyanurate network PCN–TCP was constructed by means of one-step thermal cyclotrimerization reaction.
Gen Li (743590), Xue Zhou (68629), Zhonggang Wang (1585960)   +2 more
core   +1 more source