Tag: "particles" at biology news
UF technique detects tiny, potentially harmful airborne particles
...iences building, that filters out relatively large particles
and pumps the air into a nearby lab. Next, the air...th of a meter. Hahn says his technique can measure particles
as small as one-tenth of a micron, determining both mass and composition. The technique also detects...
Turning down the Sun
...ick. Still closer to home, you could inject small particles
into near-Earth orbit or the upper atmosphere. Sul...erick Hyde to recalculate the details of releasing particles
into a near-Earth orbit, with modern engineering in mind. Surprisingly, they found it could cost a m...
New technique will improve delivery of drugs and gene therapy for cystic fibrosis patients
...ins researchers have successfully targeted aerosol particles
to smaller, harder to reach airways in the lungs o...eas, where the disease begins, because the aerosol particles
that contain the drug are too large to pass beyond airways that are partially obstructed by thick, s...
New patent will help improve cancer, transplant research
...ic cells by attaching magnetic particles
to antibodies that will seek out those cells and bind with them. Those cells are then delivered to a region of very high magnetic field. Researchers can identify the type of cell by measurin...
Penn State researchers unravel key facts about how a virus exits a host cell
...d his colleagues had the ability to recreate viral particles
in the lab and identify the parts of Gag that actually drive the budding process. Unfortunately, understanding how Gag works is half the story. Scientists also needed to know what the cell requires for budding to take place. This current research sho...
UF researcher: antioxidants play a role in deadly malnutrition disease
...r, their bodies undergo oxidative stress, in which particles
called free radicals destroy healthy cells, the researchers found. "Now that we've established that oxidative stress may be involved, simple oxidative therapies, like giving the children doses of various antioxidants, can help," Leeuwenburgh said...
Unprecedented fire season in southern Africa aids air quality, climate change research
...er, and investigate how the smoke and fine aerosol particles
affect clouds. "For the first time we were able to track this annual haze from its source and determine what happens to the aerosols in the haze," says Annegarn. "The measurements we have now of carbon transport in the haze, both as gases and pa...
2000 FALL MEETING: updated press conferences, press registration, and other information
...phasize the likely role of aerosols (e.g. airborne particles
from biomass burning, smoke, air pollution, and desert dust) in precipitation efficiency. Panelists: Edward J. Zipser, TRMM Science Team Field Campaign Coordinator; Department of Meteorology, University of Utah, Salt Lake City, Utah; Daniel Rosenf...
Microbes make mine-waste drinkable, Science researchers report
...r, they can each hold up to a billion zinc sulfide particles
and even contain trace amounts of selenium and arsenic. Many sulfate-reducing bacteria thrive in environments that totally lack oxygen, but some species actually thrive at low levels of aeration, in which sulfide precipitation should offer an e...
Hepatitis C drug overwhelms virus with flood of mutations - surprising mechanism may improve anti-viral treatments, UCSF study finds
...ns tested, only one out of every ten million virus particles
survived. The idea of error catastrophe is not new, Crotty said, but this is the first time it has been demonstrated as a mechanism for a working drug. Two pharmaceutical companies have already begun working with the study findings to develop a ...
...on of these hybrid nanodevices - the size of virus particles
- powered by the enzyme ATP, or adenosine triphosphate, the so-called energy of cellular life. Carlo Montemagno, associate professor of biological engineering, said their research shows that "the hybrid nanodevices can be assembled, maintained, and r...
Science's Top 10: genome sequencing named top scientific advance of 2000
..., has generally been thought to apply only to tiny particles
such as electrons. This year, researchers observed this phenomenon on a much larger scale, reporting that an electric current can flow around a superconducting loop of wire in both directions at the same time. And in January, a scientist challenged a...
Researchers discover gene responsible for cilia, lungs' natural cleaning system
...e ciliated, he said. They sweep mucous and trapped particles
and disease-causing organisms into the throat where they are usually swallowed and eliminated. Ciliated cells are injured and lost when flu viruses infect the lungs, for example. This reduces the ability of the lung to cleanse itself. Normal rec...
Atmospheric chemistry key to global and local air pollution
...r some pollutants so that they rain out as aerosol particles
or acid rain and clear the air. Other compounds remain in the air, changing, and changing again as other chemicals cause reactions. "Pollution from megacities and biomass burning, including precursor gases to hydrogen oxides such as acetone and forma...
Study: sea salt seasons chemical brew that destroys Arctic ozone
...carried into the snowpack in the form of tiny salt particles
by wind and waves. "Bromine and chlorine have long been suspected as major players in this series of chemical events, but the source of these chemicals was unknown," says Paul Shepson, professor of atmospheric chemistry at Purdue. "Our findings ...
Nagyvary's violin research to be celebrated Feb. 12
... last component - the varnish - probably contained particles
of powdered glass, porcelain or amber to add stiffness to the wood. Fruit tree extracts were likely used, he believes, in addition to oils. Stradivarius, Nagyvary believes, made violins that were extremely good, but not necessarily the best ever. "...
Atmospheric aerosols impact on smog formation being reassessed
...d the solar actinic flux -- is variable. Aerosols, particles
in the atmosphere, can extinguish light through scattering and absorption, reducing the rate of certain smog-forming reactions in the lowest layers of the troposphere, while sometimes enhancing their rates in the higher layers." Vuilleumier, Harley, ...
New study reveals a major cause of global warming - ordinary soot
...ature study. Human beings produce most of the soot particles
that pollute the atmosphere, observes Jacobson, an...ed on the premise that soot never mixes with other particles
in the atmosphere.`` But scientists have known for many years that floating soot particles
Card tricks and mathematics: Applying the magician's trade to numerical dilemmas
...cs that uses statistics to predict and explain how particles
interact. First, he spreads a deck of cards on ...c trick, really,`` says Diaconis. ``You have these particles
bouncing around, obeying Newton`s Laws, and somehow, instead of having to clock how they bounce arou...
Volcano helps meteorologists find answer to climate change mystery
...aerosols over eastern China are mostly carbon soot particles
from the burning of coal and wood for cooking and heating, and from unregulated industrial emissions," he said. Those aerosols tend to result in higher temperatures by absorbing solar radiation especially in the winter, when more coal and wood is bu...
1 2 3 4 5 6 7 8 9 10