Tag: "dioxide" at biology news
Duke Researchers Discover Central Role Of Nitric Oxide In Hemoglobin Action
...es oxygen tobody tissues and extracts waste carbon dioxide
while keeping vessels openand blood pressure stead... it can attractmolecules of carbon dioxide. Carbon dioxide
(CO2) is the waste gas producedfrom oxygen respiration. Hemoglobin binds CO2 and carries it to the l...
Researchers Use Hydrated Lime To Reduce Toxic Selenium Emissions
...studied forseveral years as a way to remove sulfur dioxide
from flue gas.But this is the first time studies have shown that hydrated limechemically removes selenium by means of an irreversible chemicalreaction. "The hydrated lime -- which is calcium-based -- forms withthe selenium to create calcium selenite,...
Photosystem I -- An Intermediate Step -- May Not Be Necessary For Plants
...gy of sunlight into chemical energy and use carbon dioxide
to produce sugars -- needs two intermediate light-...roduce compounds that ultimately react with carbon dioxide
to produce carbohydrates, lipids, proteins and nucleic acids -- the fundamental components of life. ...
Ocean Sediments Contain Record of Past Vegetation Fires in Africa
...ord as a major place to find out about past carbon dioxide
changes. If they've been making the wrong assumpt...bon is involved, then their estimates about carbon dioxide
in the oceans may be wrong." Current models have not been able to determine exactly how the ...
Changing Continental Runoff Patterns Could Change Ocean Circulation
...ges in deep water formation may also alter carbon dioxide
concentrations. "Cold water near the poles tha...water formation dissolves large amounts of carbon dioxide
from the atmosphere," says Bice. "It takes one to two thousand years for this carbon dioxide
NCAR Scientist Models Earth's Climate and Vegetation Patterns At Last Glacial Peak
...rees Celsius lower than now and atmospheric carbon dioxide
(a greenhouse gas) at just over half of today's levels. Felzer's study checks the NCAR model's reliability by simulating past climates and comparing its results to geological data, such as pollen deposited in lake sediments at the time, fossilized, a...
KU Researcher Eyes The Rain Forest Through The Trees
...he research shows how well plants are using carbon dioxide
and water in tropical forests that are normally in...he research shows how well plants are using carbon dioxide
and water in tropical forests that are normally inaccessible to measurement. "I am interested in the...
No Such Luck: Nitrogen From Air Pollution Unlikely to Moderate Global Warming
...ts, in turn, would absorb some of the extra carbon dioxide
in the atmosphere to moderate global warming. That scenario now seems unlikely, say scientists at the University of Toronto and the University of Minnesota. In the December 6th issue of the journal Science , Toronto's David Wedin and Minnes...
Methane Deep In Ocean Crust Could Feed Chemical-Hungry Microorganisms
...s fluids -- mainly water and fluids rich in carbon dioxide
-- that are present when magma chambers are filled with liquid rock. As the rock and tiny bubbles of these fluids cool to 500 C to 600 C, the fluids evolve into very methane-rich compositions. The second happens as the rock cools to temperatures...
Researchers Corral Millions Of Microscopic Membranes
...s to cover a surface of silica coated with silicon dioxide
with a pattern of microscopic squares. Each square was about five microns (about five thousandths of a millimeter) on a side. Its surface was treated to be chemically compatible with the membrane. The surface of the borders that separate the squares,...
Plants Need Vitamin C, Too
...lso showed that they were hypersensitive to sulfur dioxide
and ultraviolet B radiation. The plants that did not lack vitamin C stood firm against those environmental stresses, much like humans stand up well against external stresses when they consume vitamin C. Last believes this research shows that ascorb...
Purdue Researchers Prod Plants To Clean Up Pollution
...etly cleaning up behind us, recycling waste carbon dioxide
into life-giving oxygen for as long as humans have been breathing. Now Purdue University researchers are prodding them to take the cleanup a step further, to become phytoremediators -- plants that collect heavy metals and radioactive waste from pollu...
Duke researchers find existing drugs can stop fungus that attacks AIDS patients
...d in animals and people: a high pH and high carbon dioxide
environment. "This finding indicates that calcineurin is required for virulence,"Heitman said. Since pharmaceutical researchers have tested many calcineurin inhibitorsas treatments to prevent organ transplant rejection, Heitman tried sev...
Subtle Biotic Changes Have Big Environmental Impact
...ually, these processes lead to a surplus of carbon dioxide
in lakes. Excess carbon in a lake is released as a...f the processes that alter the exchange of carbon dioxide
between lakes and the atmosphere can be generalized to other ecosystems such as oceans. "Although...
UW Smogmobile Offers Cleaner, Safer Alternative To Gas Or Electric Cars
...ndenses. In the process, pollutants such as carbon dioxide
also are removed from the air and could be disposed of in a benign manner. Hertzberg pursued the smogmobile project in part to pull the plug on the electric car bandwagon being propelled by laws in California and elsewhere that require 10 percent of ...
New Mechanism To Explain Carbon Monoxide Poisoning Identified
...explanation for CO toxicity. "We found that carbon dioxide
binds tothe same sites on heme proteins as nitric oxide," notes Thom. Nitric oxide (NO)is a much-studied, naturally occurring vasodilator and gaseous signalingmolecule. An excess of NO, however, is deleterious to brain cells and othertissues. ...
New, Environmentally Friendly Technique For Separating Liquids Invented At UNC-CH
..."What we invented was a process that allows carbon dioxide
to be used toreplace these organic solvents in liq...ike surfactants into pressurized,or liquid, carbon dioxide
that form a 'microenvironment' which allows substancesnormally not soluble in the gas to become solu...
New Materials Remove Corrosive Gas In Coal-Gasification Process
...conserved and greenhouse-gas emissions like carbon dioxide
andacid-gas emissions like sulfur dioxide
and the nitrogen oxides can be reduced.To achieve maximum performance in coal-gasification plants, a...
Biodiversity Worth $2.9 Trillion
... products, ecotourism, and sequestration of carbon dioxide
that otherwise would contribute to global warming (see "Biotic Invoice," attached). The biotic beneficence would be even greater, the Cornell biologists observed, if human society took full advantage of nature's genetic offerings. For example, cu...
Termites' Attraction To Small Amounts Of Carbon Dioxide Lures Pests To Their Deaths
...tad found that termites' natural reliance oncarbon dioxide
to find food and shelter can also be used against ... believe termites are naturally attracted tocarbon dioxide
for two reasons. Rotting wood--the termites' main source offood--releases CO2, a process that likely...
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