Results 21 to 30 of about 218,762 (405)
The coordination of Mg in foraminiferal calcite [PDF]
Earth and Planetary Science Letters, 2013 The Mg/Ca ratio of foraminiferal calcite is a widely accepted and applied empirical proxy for ocean temperature. The analysis of foraminifera preserved in ocean sediments has been instrumental in developing our understanding of global climate, but the mechanisms behind the proxy are largely unknown.
Oscar Branson +6 more
openaire +3 more sources
Testing the impact of diagenesis on the delta O-18 and delta C-13 of benthic foraminiferal calcite from a sediment burial depth transect in the equatorial Pacific [PDF]
, 2013 Stable oxygen and carbon isotope (δ18O and δ13C) values measured in foraminiferal calcite are one of the primary tools used in paleoceanography. Diagenetic recrystallisation of foraminiferal calcite can act to reset primary isotopic values but its ...
Edgar, Kirsty M. +2 more
core +3 more sources
Physical and Mechanical Characterization of Artificial Stone with Marble Calcite Waste and Epoxy Resin [PDF]
Materials Research, 2017 The incorporation of calcite marble waste in epoxy resin for the production of artificial stone can represent a technical-economical method and environmentally viable, reducing the amount of discarded residue in the environment, and adding economic value
Fernanda Souza Silva +2 more
doaj +2 more sources
Buildings, 2021 Determining the age of ancient architectural and cultural monuments is a significant scientific problem. An approach based on the transformation of portlandite into calcite and subsequent recrystallization of calcite is considered, which allows for ...
Vladimir Kotlyar +5 more
doaj +1 more source
Neptunium(V) Coprecipitation with Calcite [PDF]
Environmental Science & Technology, 2007 Coprecipitation experiments of Np(V) and U(VI) with calcite were performed in mixed-flow reactors under steady state conditions at room temperature for up to 400 h at precipitation rates of 1.0 x 10(-8) to 6.8 x 10(-8) mol/(m2 s). The saturation index with respect to calcite varied between 0.04 and 0.95.
Heberling, F. +2 more
openaire +5 more sources
Assessment of crystallographic influence on material properties of calcite brachiopods [PDF]
, 2008 Calcium carbonate biominerals are frequently analysed in materials science due to their abundance, diversity and unique material properties. Aragonite nacre is intensively studied, but less information is available about the material properties of ...
A. Pérez-Huerta +3 more
core +1 more source
Crystallography of calcite in pearls
European Journal of Mineralogy, 2014 Mineralization in pearls is used as a ‘study model’ to understand basic mechanisms of calcium carbonate biomineralization. In addition to nacre formation, vaterite and calcite can be found in pearls, with the occurrence of calcite being the least studied. In this study, two calcite microstructures, prisms and “pseudo-prisms”, are described.
Perez-Huerta, A. +3 more
openaire +2 more sources
Arsenite sorption and co-precipitation with calcite [PDF]
, 2006 Sorption of As(III) by calcite was investigated as a function of As(III) concentration, time and pH. The sorption isotherm, i.e. the log As(III) vs.
A. Fernández-Martínez +43 more
core +3 more sources
Sand and silty-sand soil stabilization using bacterial enzyme–induced calcite precipitation (BEICP)
Canadian geotechnical journal (Print), 2019 This paper examines the bio-derived stabilization of sand-only or sand-plus-silt soils using an extracted bacterial enzyme application to achieve induced calcite precipitation (ICP).
T. Hoang +4 more
semanticscholar +1 more source
Rapid CO2 mineralisation into calcite at the CarbFix storage site quantified using calcium isotopes
Nature Communications, 2019 The engineered removal of atmospheric CO2 is now considered a key component of mitigating climate warming below 1.5 °C. Mineral carbonation is a potential negative emissions technique that, in the case of Iceland’s CarbFix experiment, precipitates ...
Philip A. E. Pogge von Strandmann +9 more
semanticscholar +1 more source