Results 241 to 250 of about 12,126 (296)

Performance Evaluation of a Full‐Scale Anaerobic Internal Circulation Reactor Treating Calcium Rich Dairy Industry Wastewater

open access: yesWater and Environment Journal, Volume 40, Issue 2, Page 290-300, May 2026.
This study investigates the impact of calcium on the performance of a large‐scale internal circulation (IC) reactor treating calcium‐rich dairy wastewater. Excessive calcium concentrations (400‐600 mg L−1) resulted in calcification of the anaerobic sludge, reactor walls, and pipes, suggesting a 17% and 25% reduction in biogas and methane production ...
O. D. Yepez‐Ceron   +4 more
wiley   +1 more source

Apatite saturation revisited: new model formulations and applications to igneous rocks. [PDF]

open access: yesContrib Mineral Petrol
Klein BZ   +3 more
europepmc   +1 more source

Apatite and the Apatite Supergroup

Rocks & Minerals, 2020
Most mineral collectors are familiar with apatite, a calcium phosphate, and know that there is a group of minerals with the same root name, which includes fluorapatite, hydroxylapatite, and chlorap...
John Rakovan, Jeffrey A. Scovil
openaire   +1 more source

Water on apatites

Calcified Tissue International, 1986
Adsorption of water was studied gravimetrically at 23 degrees C in an open system at several relative humidities on a variety of apatitic calcium phosphates including enamel, deproteinized enamel, and bone mineral. The amount of adsorbed water increases linearly with the surface areas of the synthetic apatites and does not appear very sensitive to ...
openaire   +2 more sources

Chitosan/apatite composite beads prepared by in situ generation of apatite or Si-apatite nanocrystals

Acta Biomaterialia, 2010
The objective of this work was to develop nanocrystalline apatite (Ap) dispersed in a chitosan (CHI) matrix as a material for applications in bone tissue engineering. CHI/Ap composites of different weight ratios (20/80, 50/50 and 80/20) and with CHI of different molecular weights were prepared by a biomimetic stepwise route.
Natalia, Davidenko   +4 more
openaire   +2 more sources

A Study of Sintered Apatites

Journal of Dental Research, 1974
Hydroxyapatite, fluorapatite, and chlorapatite materials were synthesized and their sintering characteristics were studied. The compressive strength of the apatites was determined and is given as a function of density. Scanning electron micrographs of the typical material structure are given.
W R, Rao, R F, Boehm
openaire   +2 more sources

The Lunar Apatite Paradox

Science, 2014
Wetted Apatite The long-running story of the dry Moon was rewritten a few years ago when hydrogen-bearing glass spherules were discovered. The highest water contents are found in lunar apatite, at levels suspiciously comparable to the water content of Earth apatites. Boyce et al.
J W, Boyce   +4 more
openaire   +2 more sources

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