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Latest Calcium carbonate Stories

Ocean Acidification Threatens Antarctic Marine Wildlife
2012-11-26 05:01:08

redOrbit Staff & Wire Reports - Your Universe Online An international team of researchers has uncovered the first evidence that marine creatures living in the Antarctic region are being affected by ocean acidification. That evidence was discovered in 2008, when researchers from the British Antarctic Survey (BAS), the University of East Anglia (UEA), the Woods Hole Oceanographic Institution (WHOI) and the National Oceanic and Atmospheric Administration (NOAA) observed that the shells...

2011-05-19 02:00:00

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. NPCC is a functional additive in a wide range of applications such as paper,...

2011-02-28 07:30:00

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. Anhui Guo, COO and acting CFO and Mr. A. Carl Mudd, lead independent director, will attend the Rodman & Renshaw Annual China Investment Conference to be held from March 6-8, 2011 in Shanghai. The date, time,...

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2011-02-23 10:56:19

An international research team, with Spanish participation, has discovered a new species of mollusk, Polyconites hadriani, in various parts of the Iberian Peninsula. The researchers say this species, which is the oldest in its genus, adapted to the acidification of the oceans that took place while it was in existence. This process could now determine the evolution of modern marine systems. The new species Polyconites hadriani, which was discovered in 2007, has been crowned the oldest in the...

2009-12-08 12:40:00

NEW YORK, Dec. 8 /PRNewswire/ -- Reportlinker.com announces that a new market research report is available in its catalogue: Calcium Carbonate - A Global Market Report http://www.reportlinker.com/p0164401/Calcium-Carbonate---A-Global-Market-Report.html Calcium carbonate is primarily used in the paper industry. The material is also extensively used in paint, plastic and rubber industries for enhanced product quality and cost reduction. Strong and continued growth is forecast in the global...

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2009-12-02 10:22:33

In a striking finding that raises new questions about carbon dioxide's (CO2) impact on marine life, Woods Hole Oceanographic Institution (WHOI) scientists report that some shell-building creatures"”such as crabs, shrimp and lobsters"”unexpectedly build more shell when exposed to ocean acidification caused by elevated levels of atmospheric carbon dioxide (CO2). Because excess CO2 dissolves in the ocean"”causing it to "acidify" "”researchers have been concerned about the...

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2009-10-26 15:28:49

Stony Brook University researchers find elevated carbon dioxide concentrations impede growth and survival of bivalve larvae Relatively minor increases in ocean acidity brought about by high levels of carbon dioxide have significant detrimental effects on the growth, development, and survival of hard clams, bay scallops, and Eastern oysters, according to researchers at Stony Brook University's School of Marine and Atmospheric Sciences. In one of the first studies looking at the effect of ocean...

2009-10-05 05:00:00

LAS VEGAS, Oct. 5 /PRNewswire-FirstCall/ -- Texas Wyoming Drilling, Inc. (Pink Sheets: TWDL) a publicly traded company on Pink Sheets, has announced that it has entered into a joint venture agreement with Legacy Rock Company, a Nevada based corporation, to mine and distribute Calcium Carbonate from properties owned by Legacy Rock Company. TWDL will be in charge of operations and profits will be divided on an equal basis, after TWDL recovers its costs. The properties are currently...

2009-05-28 15:26:08

U.S. marine scientists say they have discovered that rising levels of atmospheric carbon dioxide are threatening shellfish populations in many ecosystems. The researchers, led by ecologist Whitman Miller of the Smithsonian Environmental Research Center, said the increasing CO2 levels are contributing to the acidification of open ocean, coastal and estuarine waters. For shellfish and other organisms having calcium carbonate shells and structures, the problem begins when atmospheric CO2...


Latest Calcium carbonate Reference Libraries

28_3f12abda63415a07ee5b6c5d30ef8239
2005-05-26 12:17:18

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...

28_af149e6f4821ab4ec3c213f12d27e305
2005-05-26 09:38:30

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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Word of the Day
ramage
  • Boughs or branches.
  • Warbling of birds in trees.
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