The polymorphic phase transformation of thermally treated pearl powder was investigated by X-ray diffraction and thermoanalytical techniques. The phase transformation was based on quantification of the calcite content at various temperatures using Rietveld refinement analysis. The results show that the
Chemical communications (Cambridge, England), 49(30), 3134-3136 (2013-03-13)
A simple synthetic method is presented for the precipitation of high purity, dry amorphous calcium carbonate (ACC) based on freeze-drying saturated, counter ion free CaCO3 solutions, where the ACC produced shows an extended atmospheric stability. Translation of the methodology to
From quarry to temple.
Heather Pringle
Science (New York, N.Y.), 340(6134), 805-805 (2013-05-21)
Materials science. Creating flexible calcite fibers with proteins.
Ingo Sethmann
Science (New York, N.Y.), 339(6125), 1281-1282 (2013-03-16)
Annals of allergy, asthma & immunology : official publication of the American College of Allergy, Asthma, & Immunology, 110(5), 335-339 (2013-04-30)
Nondietary exposure to milk proteins may be a risk for children who do not outgrow milk allergy by school age. To study the allergenicity of casein containing chalk. A 6-year-old, milk allergic child developed asthma and rhinoconjunctivitis while in school.
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