Results 11 to 20 of about 267,019 (291)

Hyperspectral cathodoluminescence imaging of modern and fossil carbonate shells [PDF]

open access: yes, 2006
Optical cathodoluminescence (CL) is commonly used to identify diagenetically altered carbonate fossils, yet such an interpretation is problematic as present-day carbonate shells may also luminesce.
Martin, Robert   +19 more
core   +4 more sources

The crystallographic structure of dental enamel and related apatites [PDF]

open access: yes, 1964
PhDSynthetic, biological and mineralogical carbonate-containing apatites have been studied, principally by infra-red absorption spectroscopy (using polarised or unpolarised radiation), The substitution of a carbonate ion for two hydroxyl ions in the ...
Elliott, James Cornelis
core   +4 more sources

Carbon and Strontium Abundances of Metal‐poor Stars [PDF]

open access: yesThe Astrophysical Journal, 2007
We present carbon and strontium abundances for 100 metal-poor stars measured from R$\sim $7000 spectra obtained with the Echellette Spectrograph and Imager at the Keck Observatory. Using spectral synthesis of the G-band region, we have derived carbon abundances for stars ranging from [Fe/H]$=-1.3$ to [Fe/H]$=-3.8$.
Lai, David K.   +3 more
openaire   +2 more sources

Strontium carbonate in glazes from the SiO2–Al2O3–CaO–MgO–Na2O–K2O system, sintering and surface properties

open access: yesOpen Ceramics, 2022
In this study, the influence of the addition of SrO on sintering and selected parameters of the surface of the glazes from the SiO2–Al2O3–CaO–MgO–Na2O–K2O system were examined.
K. Kaczmarczyk   +3 more
doaj   +1 more source

Preparation of nano-structured strontium carbonate from Dasht-e kavir celestite ore via mechanochemical method [PDF]

open access: yesJournal of Ultrafine Grained and Nanostructured Materials, 2018
Strontium carbonate (SrCO3) is one of the most important strontium compounds that have been used in a variety of technological and industrial applications.
Erfan Alimohammadi   +2 more
doaj   +1 more source

Investigation of the radiopacity and cytotoxicity of Albo-Dent - novel strontium carbonate incorporated calcium silicate based dental cement [PDF]

open access: yesStomatološki glasnik Srbije, 2021
Introduction: Calcium silicate (CS) dental cements have numerous clinical indications in dentistry including pulp capping, root end surgery, perforation repair and apexification/apexogenesis treatment.
Despotović Ana   +4 more
doaj   +1 more source

Microbial formation of crystalline strontium carbonate [PDF]

open access: yesFEMS Microbiology Letters, 1994
Pseudomonas fluorescens appeared to grow in a mineral medium containing strontium (5 mM) complexed to citrate, the sole source of carbon, without any evident inhibition in cellular yield. Atomic absorption studies showed that the divalent metal was excluded from the cytoplasmic component and was initially found in the supernatant fluid in soluble form ...
Shawna Anderson, Vasu D. Appanna
openaire   +2 more sources

Strontium-loaded mineral bone cements as sustained release systems : Compositions, release properties, and effects on human osteoprogenitor cells [PDF]

open access: yes, 2011
This study aims to evaluate in vitro the release properties and biological behavior of original compositions of strontium (Sr)-loaded bone mineral cements.
Cédric Charvillat   +17 more
core   +1 more source

Toxicological response and bioaccumulation of strontium in Festuca rubra L. (red fescue) and Trifolium pratense L. (red clover) in contaminated soil microcosms

open access: yesEnvironmental Systems Research, 2023
Potentially toxic elements (PTE) from industrial activities remain a global concern for their environmental hazards. In particular, strontium is found in drinking water and food, primarily from contamination from the nuclear industry, petroleum ...
Phatchani Srikhumsuk   +3 more
doaj   +1 more source

The Precambrian marine carbonate isotope database: version 1.1. [PDF]

open access: yes, 2002
We present a compilation of strontium, carbon, and oxygen isotope compositions of roughly 10,000 marine carbonate rocks of Archean - Ordovician age (3800 Ma – 450 Ma).
Shields, GA   +5 more
core   +1 more source

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