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Latest Carbonic acid Stories

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...

2009-03-20 23:01:44

A U.S. biological oceanographer says acidification could be causing a slow-motion destruction of ocean ecosystems. Victoria Fabry, a visiting researcher at Scripps Institution of Oceanography at the University of California, San Diego, said tests show just 48 hours of exposure to slightly corrosive seawater causes mollusc shells to start to dissolve. The university said increasing levels of carbon dioxide could spell ecological disaster to industries dependent on the seas. About a third of...

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2009-01-30 08:55:00

The oceans of the world act as a shock absorber for the effects of climate change - absorbing a sizeable amount of the greenhouse gas carbon dioxide, according to a New York Times report. However, this assistance comes with a price: as the gas dissipates, it causes the seawater to become more acidic. As a result, an international board of marine scientists state that this acidity is growing so rapidly that it hurts the chances of the continued existence of coral reefs, shellfish and the...

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2008-11-25 08:15:00

Researchers now believe the ocean is growing more acidic faster than once thought, thanks to increasing levels of atmospheric carbon dioxide. University of Chicago scientists documented the phenomena in a paper published online in the Proceedings of the National Academy of Sciences. "Of the variables the study examined that are linked to changes in ocean acidity, only atmospheric carbon dioxide exhibited a corresponding steady change," said J. Timothy Wootton, the lead author of the study...

2008-08-27 03:00:48

By Krupa, Sagar Booker, Fitzerald; Bowersox, Van; Lehmann, Chris Topher; Grantz, David ABSTRACT Approximately 80 different crop species are grown in the United States in widely differing geographic areas, climatic and edaphic conditions, and management practices. Although the majority of cultivated acreage in the United States is planted with only about 10 primary crops, uncertainties associated with trace gas emissions arise from: (1) limited data availability, (2) inaccurate estimates...

2008-08-09 03:00:24

By Lapointe, Mathieu MacKenzie, Tyler D B; Morse, David The oceans globally constitute an important sink for carbon dioxide (CO2) due to phytoplankton photosynthesis. However, the marine environment imposes serious restraints to carbon fixation. First, the equilibrium between CO2 and bicarbonate (HCO^sub 3^-) is pH dependent, and, in normal, slightly alkaline seawater, [CO2] is typically low (approximately 10 mM ). Second, the rate of CO2 diffusion in seawater is slow, so, for any cells...

2008-06-24 03:02:21

By Ferreira, Fernando J Guo, Cathy; Coleman, John R Carbonic anhydrase (CA; EC 4.2.1.1) catalyzes the interconversion of CO^sub 2^ and HCO^sub 3^^sup -^ and is a major protein constituent of the C^sub 3^ higher plant chloroplast where it is presumed to play a role in photosynthetic carbon assimilation. In this study, we have used both RNA antisense and gene knockout lines to specifically reduce the activity of the chloroplast betaCA1 polypeptide (At3g01500) in the model plant Arabidopsis...

2008-06-24 03:02:20

By Carr, Herman Axelsson, Lennart When Zostera marina was irradiated after a period of darkness, initiation of photosynthetic O2 evolution occurred in two phases. During a lag phase, lasting 4 to 5 min, photosynthesis was supported by a diffusive entry of CO2. Photosynthesis then rapidly increased to its full rate. Tris buffer, at a concentration of 50 mM, completely inhibited this increase without affecting CO2-supported photosynthesis during the lag phase. These results verify that the...

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2008-06-09 11:10:00

A team of UK scientists has documented the affects of carbon dioxide on marine life.By studying naturally occurring carbon dioxide vents in the sea floor, researchers believe they were able to gauge how CO2 will impact marine life.Writing in the journal Nature, the scientists noted a declining number of species as well as snails with their shells disintegrating. They imply that these impacts could occur worldwide with the increasing levels of CO2 in the atmosphere.The team investigated these...

2008-02-09 03:00:22

By Chow, Judith C Doraiswamy, Prakash; Watson, John G; Chen, L-W Antony; Ho, Steven Sai Hang; Sodeman, David A ABSTRACT Recent improvements in integrated and continuous PM^sub 2.5^ mass and chemical measurements from the Supersite program and related studies in the past decade are summarized. Analytical capabilities of the measurement methods, including accuracy, precision, interferences, minimum detectable levels, comparability, and data completeness are documented. Upstream denuders...


Latest Carbonic acid Reference Libraries

Ocean Acidification
2013-04-01 10:32:20

Ocean acidification is the name that was given to the ongoing decrease in the pH of Earth’s oceans, a cause of the uptake of anthropogenic carbon dioxide from the atmosphere. About 30 to 40 percent of the carbon dioxide that is released by humans into the atmosphere dissolves into the lakes, oceans, and rivers. To maintain the chemical equilibrium, some of it reacts with the water to create carbonic acid. Some of these extra carbonic acid molecules react with a water molecule to provide a...

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Word of the Day
tesla
  • The unit of magnetic flux density in the International System of Units, equal to the magnitude of the magnetic field vector necessary to produce a force of one newton on a charge of one coulomb moving perpendicular to the direction of the magnetic field vector with a velocity of one meter per second. It is equivalent to one weber per square meter.
This word is named for Nikola Tesla, the inventor, engineer, and futurist.