Results 21 to 30 of about 169,014 (352)

Crystallization of calcite from amorphous calcium carbonate: earthworms show the way [PDF]

open access: yes, 2008
No abstract ...
Canti   +5 more
core   +1 more source

Phase composition and biocompatibility of calcium phosphate coatings on titanium enriched with hydroxyapatite

open access: yesФизико-химические аспекты изучения кластеров, наноструктур и наноматериалов, 2023
Calcium phosphate coatings containing brushite, calcite, and apatite were obtained by electrochemical deposition on titanium plates at room temperature, pH 5, constant current density 30 mA/cm2, from CaCO3/Ca(H2PO4)2 suspension electrolyte.
A.E. Doroshenko   +6 more
doaj   +1 more source

Khirbet al-Batrawy ceramics. A systematic mineralogical and petrographic study for investigating the material culture [PDF]

open access: yes, 2017
The present paper reports the results of a mineralogical and petrographic study focused on the archaeometric characterization of Early Bronze Age pottery from the archaeological site of Khirbet al-Batrawy (Jordan), dated between 3000 and 2000 BC. Optical
Medeghini, Laura, Nigro, Lorenzo
core   +1 more source

Evaluating the Effect of 18O Incorporation on the Vibrational Spectra of Vaterite and Calcite

open access: yesCrystals, 2022
Calcium carbonates are critical in biomineralization processes and as functional materials. For many applications, isotope enrichment in these materials allows researchers to monitor reaction pathways and retrace environmental signatures.
Helen E. King   +2 more
doaj   +1 more source

Marine bivalve geochemistry and shell ultrastructure from modern low pH environments [PDF]

open access: yes, 2011
. Bivalve shells can provide excellent archives of past environmental change but have not been used to interpret ocean acidification events. We investigated carbon, oxygen and trace element records from different shell layers in the mussels Mytilus ...
Baggini, C   +8 more
core   +2 more sources

High P-T Calcite-Aragonite Phase Transitions Under Hydrous and Anhydrous Conditions

open access: yesFrontiers in Earth Science, 2022
The subduction of calcite into deep Earth and subsequent phase change are important for global carbon cycle. However, the study of the phase boundary between calcite and aragonite under high P-T conditions is insufficient due to sparse existing phase ...
Xia Zhao   +10 more
doaj   +1 more source

The origin of alteration “orangettes” in Dhofar 019: Implications for the age and aqueous history of the shergottites [PDF]

open access: yes, 2017
The shergottites are the largest group of Martian meteorites, and the only group that has not been found to contain definitive evidence of Martian aqueous alteration.
Hallis, L.J.   +3 more
core   +1 more source

The influence of surface roughness on the adhesive interactions and phase behavior of suspensions of calcite nanoparticles [PDF]

open access: yes, 2020
We investigate the impact of nanoparticle roughness on the phase behaviour of suspensions in models of calcium carbonate nanoparticles. We use a Derjaguin approach that incorporates roughness effects and interactions between the nanoparticles modelled ...
Brekke-Svaland, Gøran   +2 more
core   +2 more sources

Data report: late Miocene to early Pliocene coccolithophore and foraminiferal preservation at Site U1338 from scanning electron microscopy [PDF]

open access: yes, 2014
The late Miocene to early Pliocene carbonate-rich sediments recovered at Integrated Ocean Drilling Program (IODP) Site U1338 during the Expedition 320/321 Pacific Equatorial Age Transect (PEAT) program contain abundant calcareous nanno- and microfossils.
Drury, Anna Joy   +3 more
core   +1 more source

Home - About - Disclaimer - Privacy