Results 31 to 40 of about 225,314 (391)

Surface Forces Apparatus Measurements of Interactions between Rough and Reactive Calcite Surfaces. [PDF]

open access: yesLangmuir, 2018
nm-Range forces acting between calcite surfaces in water affect macroscopic properties of carbonate rocks and calcite-based granular materials and are significantly influenced by calcite surface recrystallization. We suggest that the repulsive mechanical
J. Dziadkowiec   +4 more
semanticscholar   +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

Mg/Ca ratios in freshwater microbial carbonates: Thermodynamic, kinetic and vital effects [PDF]

open access: yes, 2014
The ratio of magnesium to calcium (Mg/Ca) in carbonate minerals in an abiotic setting is conventionally assumed to be predominantly controlled by (Mg/Ca)solution and a temperature dependant partition coefficient. This temperature dependence suggests that
Greenway, G.   +4 more
core   +2 more sources

FTIR-Based Crystallinity Assessment of Aragonite–Calcite Mixtures in Archaeological Lime Binders Altered by Diagenesis

open access: yesMinerals, 2019
Lime plaster and mortar are pyrotechnological materials that have been employed in constructions since prehistoric times. They may nucleate as calcite and/or aragonite under different environmental settings.
M. Toffolo   +4 more
semanticscholar   +1 more source

Body temperatures of modern and extinct vertebrates from ^(13)C-^(18)O bond abundances in bioapatite [PDF]

open access: yes, 2010
The stable isotope compositions of biologically precipitated apatite in bone, teeth, and scales are widely used to obtain information on the diet, behavior, and physiology of extinct organisms and to reconstruct past climate.
Eagle, Robert A.   +5 more
core   +2 more sources

Correlation of the entrainment factor with frother types and their mixtures in the column flotation

open access: yesCumhuriyet Science Journal, 2019
In flotation, entrainment is a mechanical mass transfer process and itis based on the changes depending on the establishment of linear relationshipbetween water and solid recovery. The present paper presents results obtainedin investigating the effect of
Hülya Kurşun
doaj   +1 more source

Influence of crystallographic orientation of biogenic calcite on in situ Mg XANES analyses [PDF]

open access: yes, 2008
Micro X-ray absorption near-edge spectroscopy at the Mg <i>K</i>-edge is a useful technique for acquiring information about the environment of Mg<sup>2+</sup> in biogenic calcite.
Cusack, M.   +3 more
core   +2 more sources

Optical alignment and spinning of laser-trapped microscopic particles [PDF]

open access: yes, 1998
Light-induced rotation of absorbing microscopic particles by transfer of angular momentum from light to the material raises the possibility of optically driven micromachines.
A Ashkin   +9 more
core   +2 more sources

Control of crystal polymorph in microfluidics using molluscan 28 kDa Ca2+-binding protein [PDF]

open access: yes, 2010
Biominerals produced by biological systems in physiologically relevant environments possess extraordinary properties that are often difficult to replicate under laboratory conditions.
Cusack, M.   +5 more
core   +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

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