Tag: "soot" at biology news
Livermore research in accelerator mass spectrometry highlighted at ACS meeting
...iam Pitz have used kinetic modeling to observe the soot
production chemistry involved. The chemical kinetic models used in studying soot
production during munitions destruction were originally developed in Livermore's studies on soot
Climate change Qs & As
...rsity of Michigan. Various types of aerosols--from soot
and dust to sulfur--can either cool or warm the climate, she explained. Warming is associated with absorbing black carbon emissions such as soot, while non-absorbing aerosols are tied to cooling, which scientists call "negative forcing." "In the long...
New reactor puts hydrogen from renewable fuels within reach
...only 50 milliseconds and eliminates the flames and soot
that commonly accompany ethanol combustion. In a typical ethanol-water fuel mixture, one could ideally get five molecules of hydrogen for each molecule of ethanol. Reacting ethanol alone would yield three hydrogen molecules. So far, the Schmidt team...
Astronomers unravel a mystery of the Dark Ages
... explosion was such that it enveloped the earth in soot
and ash, blocking out the sunlight and causing the very cold weather. This effect is known as a plume and is similar to that which was seen when comet Shoemaker-Levy-9 hit Jupiter in 1995. Historical references from this period - known as the Dark Ag...
NIEHS-funded researchers find low-level ozone increases respiratory risk of asthmatic children
...ulate matter, which includes dust, dirt, smoke and soot
from a variety of natural and man-made sources, can significantly aggravate asthma symptoms. Repeated exposures to ozone and fine particles at or above the federal standards can irritate or damage sensitive tissue in the airways and lungs, making ...
Fe-TAML(R) activators developed at Carnegie Mellon remove recalcitrant sulfur from automotive fuels
... other technologies designed to prevent release of soot
particles. As a result, these particles are released into exhaust fumes, along with sulfur contaminants (sulfur oxides). The particles have been linked to asthma, while sulfur oxides contribute to acid rain. Fe-TAMLs (TAML stands for tetra-amido macr...
A global 'catastrophe' -- coal fires threaten environment, human health
... large volumes of greenhouse and noxious gases and soot
particles into the atmosphere. While researchers have yet to measure coal fires' emissions, the large-scale burning in coal producing countries may be making a significant contribution to global and regional climate change, as well as regional air ...
Imaging apparatus characterizes drops in 'dirty' laboratory environments
...system also have the capability of detecting small soot
particles." In operation, large drops of water or ...l system could track large drops and the resulting soot
particles through the flame. "To get these drops to break up and vaporize, we need a longer combust...
Most definitive study yet shows tiny particles in air are linked to lung cancer
... contains high concentrations of tiny particles of soot
and dust significantly increases the risk of dying...16-year period. Previous studies have linked soot
in the air to many respiratory ailments and even death, but the new study is the most definitive yet...
The K-T impact extinctions: Dust didn't do it
... sulfate aerosols produced from impacted rocks and soot
from global fires that could have shut down photosynthesis and caused global cooling. The original studies of the clay layer found at the K-T boundary assumed much or all of this layer was derived from fine impact dust, he said. More recent studies ...
Urban air pollution linked to birth defects for first time; UCLA research links two pollutants to increased risk of heart defects
...dentify the chemical components of the microscopic soot
that is contained in vehicle tailpipe emissions. The UCLA School of Public Health-based center, one of four major particulate centers funded by federal officials, has identified compounds that researchers suspect could affect human health....
Anthrax dectectors are coming
...howed that common substances such as road dust and soot
behaved differently than bacteria, Small said. Dr. Small has successfully tested biological particles ranging in size from 1 to 10 microns by using lasers and acoustic sensors to detect and identify microbes. In the research, laser pulses were used t...
New system developed for removing contaminants from storm run-off
...ss streets and highways, picking up oil, gasoline, soot
and other contaminants and eventually depositing it in rivers, streams and bays. While a variety of methods have been used to remove the contaminants before they reach local waters, their effectiveness varies. Thomas Boving, assistant professor of ...
New technology reduces noxious emissions
...ests also have shown the potential for significant soot
reduction. The soot
portion of exhaust consists of tiny particles of carbon and organics that are potentially harmful to...
Volcano helps meteorologists find answer to climate change mystery
..."The aerosols over eastern China are mostly carbon soot
particles from the burning of coal and wood for co...and his colleagues found that the amount of carbon soot
pollution over China increased during the last half century, at the same time average annual tempera...
New study reveals a major cause of global warming - ordinary soot
.... According to a new study in the journal Nature, soot
may be the second biggest contributor to global wa.... 8 Nature study. Human beings produce most of the soot
particles that pollute the atmosphere, observes Jacobson, an assistant professor of civil and enviro...
Building better engines through natural selection
...t reduces nitric oxide emissions by three-fold and soot
emissions by 50 percent over the best available technology. At the same time, the model reduced fuel consumption by 15 percent. Six engine performance measures were studied, including fuel injection timing, injection pressure, and amount of exhaus...
Toxicologists discover traces of diesel exhaust in the body
... now, the risk of lung cancer from inhaling diesel soot
particles has been assessed on the basis of cases ...f the larger particles contained in air consist of soot
particles from diesel exhaust fumes. The WHO has designated such particles as "suspected of causing ...
Large air pollution center established at NYU School of Medicine
...cles known as particulate matter form the haze and soot
fouling the air in major urban centers. On hazy days in many big cities, the minute flecks of matter, measuring far less than the width of a human hair, obscure the view of skyscrapers. The particles are a result of the emissions from smokestacks, ve...
Feeding the world by cleaning the air: study ties heavy regional haze to reductions in China's crop production
...na uses to fire much of its industry produces soot
and fine particles. Fuel for cooking and home heating also tends to be dirty. Agricultural practices involve burning crop debris at the end of the growing season. And China gets hit each spring with dust from desert regions in the west...