UCSD researchers make first direct observations of biological particles in high-altitude ice clouds
A team of UC San Diego-led atmospheric chemistry researchers moved closer to what is considered the "holy grail" of climate change science when it made the first-ever direct detection of biological particles
within ice clouds.
The team, led by Kerri Pratt, a Ph.D. student of atmospheric chemist...
Dangerous printer particles identified
The identity and origin of tiny, potentially hazardous particles
emitted from common laser printers have been revealed by a new study at Queensland University of Technology.
Professor Lidia Morawska from QUT's International Laboratory for Air Quality and Health lead the study to answer questio...
When particles are so small that they seep right through skin
Scientists are finding that particles
that are barely there tiny objects known as nanoparticles that have found a home in electronics, food containers, sunscreens, and a variety of applications can breech our most personal protective barrier: The skin.
under scrutiny by Lisa DeL...
Mesothelin engineered on virus-like particles provides treatment clues for pancreatic cancer
New understanding of a protein that spurs the growth of pancreatic cancer could lead to a new vaccine against the deadly disease, said researchers at Baylor College of Medicine in Houston in a report appearing in the current edition of the journal Molecular Cancer Therapeutics.
The protein call...
Tiny dust particles from Asian deserts common over western United States
It has been a decade since University of Washington scientists first pinpointed specific instances of air pollution, including Gobi Desert dust, traversing the Pacific Ocean and adding to the mix of atmospheric pollution already present along the West Coast of North America.
Now a UW research...
MIT sculpts 3-D particles with light
CAMBRIDGE, Mass.--MIT engineers have used ultraviolet light to sculpt three-dimensional microparticles that could have many applications in medical diagnostics and tissue engineering. For example, they could be designed to act as probes to detect certain molecules, such as DNA, or to release drugs...
Worldwide atmospheric measurements will determine the role of atmospheric fine particles
The Finnish Meteorological Institute in Helsinki, Finland, will host the first annual meeting of the European Integrated Project on Aerosol Cloud Climate and Air Quality Interactions, EUCAARI, headed by Academy Professor Markku Kulmala, on 1922 November 2007. The purpose of EUCAARI is to significa...
Tiny airborne particles are a major cause of climate change
A scientist at the Weizmann Institute of Science and his colleagues caused a storm in the atmospheric community when they suggested a few years back that tiny airborne particles, known as aerosols, may be one of the main culprits causing climate change ?having, on a local scale, an even greater imp...
Picking particles faster than one at a time
Computer scientists and biologists at the Department of Energy's Lawrence Berkeley National Laboratory have developed software that can select tens of thousands of high-quality images of biological molecules from electron microgaphs, rapidly and automatically, with accuracy approaching that of expe...
Tiny particles could solve billion-dollar problem
New research from Rice University's Center for Biological and Environmental Nanotechnology finds that nanoparticles of gold and palladium are the most effective catalysts yet identified for remediation of one of the nation's most pervasive and troublesome groundwater pollutants, trichloroethene or ...
Carbon nanoparticles toxic to adult fruit flies but benign to young
...l mine. You get sick more from the effects of dust particles
than from specific toxins in the dust."
The sci...e test tube into another and deposited some of the particles
in the clean tube. That test showed how insects co...les, the Brown scientists noticed that some of the particles
ended up being stored in the flies' tissue. That m...
AGU journal highlights -- Aug. 6, 2009
4. Martian dust storms generate lightning
Dust storms on Earth build up an electric field as dust particles
collide, and then emit lightning as the electric field discharges. Some previous evidence suggested that Martian dust storms might also generate light...
Symposium to discuss geoengineering to fight climate change at the ESA Annual Meeting
...nderstanding, he says.
One global-scale geoengineering method, termed atmospheric seeding, would cool the climate by releasing light-colored sulfur particles
or other aerosols into the atmosphere to reflect the sun's rays back into space. This approach mimics what happens naturally when volcanoes erupt; in...
New insights into health and environmental effects of carbon nanoparticles
...terial "hot spots," or spills, near manufacturing facilities in the future could pick up and transport nanoparticles on their bodies, transferring the particles
to other flies or habitats in the environment. The study on carbon nanoparticles barely 1/5,000th the width of a human hair is scheduled for the Aug....
Brain difference in psychopaths identified
...magnetic resonance imaging (DT-MRI) tractography to analyse the UF in psychopaths.
They found a significant reduction in the integrity of the small particles
that make up the structure of the UF of psychopaths, compared to control groups of people with the same age and IQ. Also, the degree of abnormality wa...
Sustainable agriculture at the ESA Annual Meeting
...gher diversity of soil bacteria; conventional tilling produced lower bacterial diversity.
Kumar says that conventional tillage systems disrupt soil particles
and decrease soil pore size, which can lead to decreased water and soil access for microbes. Although he recognizes that tillage is necessary, he thin...
August 2009 Geology and GSA Today media highlights
...sia is often hit by severe dust storms. It has been suggested that the dust particles
are blown from the arid lands of northern China. However, scientists know l...ction of these dust particles. Li et al. constrain the origin of dust-storm particles
by the isotopic tracers of neodymium and strontium. They collected samples ...
Jet-propelled imaging for an ultrafast light source
...f solid material like glass invariably clog up, limiting droplets to at best 20 micrometers across. What Spence and his colleagues wanted was a jet of particles
less than a micrometer in size.
Back in 1878 Lord Rayleigh, a professor of experimental physics at Cambridge University, discovered that a smooth,...
Wildfires set to increase 50 percent by 2050
...system in the western US.
Significantly, the research also predicts a 40% increase in the western United States in the concentration of tiny soot particles
in the air, known to scientists as organic carbon aerosol. This will have important consequences on western US air quality and visibility.
All-in-1 nanoparticle: A Swiss Army knife for nanomedicine
...medical therapies to cook nearby cells.
But combine a quantum dot and a gold nanoparticle, and the effects disappear. The electrical fields of the particles
interfere with one another and so neither behaves as it would on its own. The two have been successfully combined on a surface, but never in a single ...
New supercomputer to reel in answers to some of Earth's problems
...d. For example, climate scientists who are trying to understand the tiniest particles
in the atmosphere or chemists watching how atoms tug at each other in a mol...orm stable clusters. The work also gives researchers insight into how small particles
in the air form clouds or break them up.
Bacterial transformers: Commun...
DOE-funded research projects win 46 R&D 100 Awards for 2009
...raphy Lens - The lens will help scientists measure the size and velocity of particles
ejected off a metal after it is hit by a shock wave. The physics of these particles
will be used to develop a theoretical model for nonnuclear experiments that...
Airway cells use 'tasting' mechanism to detect and clear harmful substances
The hair-like protrusions, called motile cilia, were already known to beat in a wave-like motion to sweep away mucus, bacteria and other foreign particles
from the lungs.
The study is the first to show that motile cilia on airway cells not only have this "clearing" function, but also use the receptor...
Improved air quality during Beijing Olympics could inform pollution-curbing policies
...a major source of black carbon emission during the summer in Beijing. These particles
are not only harmful to the lungs, but are also known to be a global warmin...7 readings. Carbon dioxide decreased 47 percent, and ultrafine carbon-based particles
those that measure less than 100 nanometers decreased 78 percent.
What scientists know about jewel beetle shimmer
...s cone-like structures and that has a helical arrangement of molecules.
Research suggests the cells come from spontaneous arrangement of glucose-like particles
called chitin molecules that form as cones like those in a cholesteric liquid crystal. When these cones solidify, they preserve their structures and p...
New windows opened on cell-to-cell interactions
... membrane lipids -- onto to tiny glass spheres about one-millionth of a meter in diameter to closely study colloidal interaction.
Colloids are tiny particles
found dispersed in liquids: in milk, paints, many food stuffs, cosmetics and pharmaceuticals. Compared to atoms and molecules colloids are big, and cr...
Scripps-led study shows ocean health plays vital role in coral reef recovery
...ripps graduate student and lead author on the study. "Similarly, a coral organism that must be constantly trying to clean itself from excess sediment particles
will have a more difficult time recovering after a stressful condition like bleaching."
Carilli and colleagues analyzed 92 coral cores collected ...
When children have breathing problems
...uickly the air pollution diminishes and to what extent children's health improves as a result. Whether the total mass of particulates or the number of particles
per cubic centimetre is more important in terms of health problems and how we can influence climate impacts are also very topical questions," says phy...
Chasing tiny vehicles
...uide them to where their cargo is needed. Magnetic particles
have already been tried in cancer therapies: They ...ighly sensitive method works by tagging individual particles
with a dye that acts like a "molecular lamp" to li...st author of the study. "We were able to watch the particles
in real-time and at high temporal and spatial reso...
The last supper of the hominids establishes the times they lived at the sites
...ly published in the Journal of Human Evolution , the researchers analyze the dental wear of the ungulates (herbivorous mammals) caused by microscopic particles
of opaline silica in plants. These marks appear when eating takes place and erase the previous ones. This is why they are so useful.
Thanks to th...
Baylor researchers unravel mystery of DNA conformation
... by normal cell functions such as DNA replication, transcription, repair and recombination. DNA is also accompanied by a cloud of counterions (charged particles
that neutralize the genetic material's very negative charge) and, of course, the protein macromolecules that affect DNA activity.
"Many models and ...
Clean fuels could reduce deaths from ship smokestacks by 40,000 annually
...d colleagues note that most oceangoing ships burn fuels with a high sulfur content that averages 2.4 percent. Their smokestacks emit sulfur-containing particles
linked to increased risks of lung and heart disease. A 2007 study by the researchers estimated that about 60,000 people died prematurely around the wo...
New way to make sensors that detect toxic chemicals
... to making the sensor work is how the nickel oxide particles
are made. Beach and Morris have devised a new synthesis method that yields very small particles
-- which give the sensor a large surface area to c...e chemical molecules from the air -- and very pure particles
-- which enable the sensor to detect even very sma...
New nanoparticles could revolutionize therapeutic drug discovery
...robust enough for experimental interrogation, has eluded scientists for decades, but is now available."
Using a polymer - styrene maleic acid lipid particles
(SMALPs), the researchers solubilised a pair of membrane proteins. They found that not only did the proteins maintain their folded structure, binding ...
American Chemical Society's Weekly Presspac -- June 17, 2009
...tific studies showing that this approach is effective in improving air quality, including a 98 percent reduction in air pollution from tiny, inhalable particles
of coal soot. Their study is scheduled for the July 15 issue of ACS' Environmental Science & Technology , a semi-monthly journal.
In the new stud...
Athletes, spectators faced unprecedented air pollution at 2008 Olympic Games
...ric particulate matter, researchers say, is a concern because various sized particles
have potentially toxic chemicals "sorbed" to them. The fine particles
have been linked to increased respiratory morbidity and mortality. In China...
Tips from the journals of the American Society for Microbiology
... A new study suggests that vaccination with 1918 H1N1 influenza virus-like particles
not only protected mice and ferrets against the lethal 1918 influenza virus... T.M. Tumpey. 2009. Intranasal vaccination with 1918 influenza virus-like particles
protects mice and ferrets from lethal 1918 and H5N1 influenza virus challen...
Shape matters in the case of cobalt nanoparticles
...also decreases gradually. On the other hand, the magnetization of the cubic particles
in the columns decreases in a much slower fashion until the particles
rearrange their magnetic moments from linear chains into small circular gro...
Nanocrystals reveal activity within cells
...r showed similarly strong luminescence from the nanocrystals within the mouse cell, without any measurable background signal.
"While these types of particles
have existed in one form or another for some time, our discovery of the unprecedented 'single-molecule' properties these individual nanocrystals posse...
Global sunscreen won't save corals
...s not enough to make a big difference."
A widely-discussed proposal for countering warming with geoengineering involves injecting small, reflective particles
into the upper atmosphere. This would partially block incoming sunlight before it reached the Earth's surface, lowering global temperatures just as vo...