Latest Calcium carbonate Stories
An international team of researchers has uncovered the first evidence that marine creatures living in the Antarctic region are being affected by ocean acidification.
SINGAPORE, May 19, 2011 /PRNewswire-Asia/ -- NanoMaterials Technology Private Limited ("NMT") announced today that it has signed an agreement with Lagos Industria Quimica Ltda ("Lagos Brazil") for the use of its proprietary High Gravity Controlled Precipitation ("HGCP") Technology to manufacture, market and distribute nano-precipitated calcium carbonate ("NPCC") in South America and other parts of the world.
SHANGHAI, Feb. 28, 2011 /PRNewswire-Asia-FirstCall/ -- ShengdaTech, Inc. ("ShengdaTech" or the "Company") (NASDAQ: SDTH), a leading manufacturer of nano-precipitated calcium carbonate ("NPCC") in China, today announced that Mr. Xiangzhi Chen, the Company's chairman and CEO, Ms.
An international research team, with Spanish participation, has discovered a new species of mollusk, Polyconites hadriani, in various parts of the Iberian Peninsula.
NEW YORK, Dec.
In a striking finding that raises new questions about carbon dioxideâ€™s (CO2) impact on marine life, Woods Hole Oceanographic Institution (WHOI) scientists report that some shell-building creaturesâ€”such as crabs, shrimp and lobstersâ€”unexpectedly build more shell when exposed to ocean acidification caused by elevated levels of atmospheric carbon dioxide (CO2).
Stony Brook University researchers find elevated carbon dioxide concentrations impede growth and survival of bivalve larvae.
LAS VEGAS, Oct. 5 /PRNewswire-FirstCall/ -- Texas Wyoming Drilling, Inc.
Aragonite is a polymorph of the mineral calcite, both having the chemical composition CaCO3. Its structure differs from calcite and leads to a different crystal shape, an orthorhombic system with acicular crystals. By repeated twinning pseudo-hexagonal forms result. It may be columnar or fibrous, occasionally in branching stalactitic forms called flos-ferri (flowers of iron) from their association with the ores at the Carthinian iron mines. The type location for aragonite is Molina de...
Limestone is a sedimentary rock composed of the mineral calcite (calcium carbonate). The primary source of this calcite is usually marine organisms. These organisms secrete shells that settle out of the water column and are deposited on ocean floors as pelagic ooze (see lysocline for information on calcite dissolution). Secondary calcite may also be deposited by supersaturated meteoric waters (groundwater that precipitates the material in caves). This produces speleothems such as stalagmites...
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