Tag: "particles" at biology news
Vibrating Cells Could Be The Ultimate In Noninvasive Screening
...sed to a strong magnetic field. This makes charged particles
inthe tissue vibrate. If the frequency of the pulse is high enough, then thevibrations can be detected using ultrasound sensors. By monitoring the intensityand the phase difference between the two signals a high contrast 3D image of thetissue inside ...
Penn State Engineers Develop New Simulation For Ultrafine Particle Growth Process
...ramic membranes for gasseparation. The size of the particles
is important to the activity of themembrane in this application and nanosize particles
are difficult to obtain innon-aggregated form. He and his group have shown that stirring ind...
Oregon Scientists Discover A Second Blood-Brain Barrier; Important Finding For Patients With Brain Cancers And Neurological Disorders
...rapeutic genes to their target tissues.)Using iron particles
the same size as viruses, the Oregon researchers n...o assess thedistribution of these viral-sized iron particles
in patients with brain tumorsto determine the feasibility of gene therapy. ...
Sandia Decontamination Foam May Be Tomorrow's Best First Response In A Chem-Bio Attack
...e foam is insignificant.The foam neutralizes viral particles
in minutes, as well. "It has performed superbly for all the agents we have tested it against," Tadrossays. More tests planned for April will pit the foam against real anthrax and otherbacterial spores. "If you can kill spores, you can kill germinatin...
NCAR Scientists, Aircraft, Instruments Head To Indian Ocean For Climate ChangeExperiment; UCAR Directs Operations
...tering that occurs when solarradiation bounces off particles
in clear air. The indirect effects haveto do with sulfates' interactions with clouds. Globally, aerosols are an important source of nuclei around which clouddroplets can condense, and in the tropics they are the chief source. Themore cloud condensati...
INDOEX Researchers Document The Impact Of Pollutants On Climate Processes Over The Tropical Indian Ocean
...y less than a few micrometersin diameter. The haze particles
are primarily composed of soot, sulfates,nitrates,...ce that the haze layer iscaused by pollution. Haze particles
scatter solar radiation, a process that reduces the amount ofsunlight reaching the ocean surface, th...
Risks For Heart Disease Associated With Size Of LDL Particles
..., depending on thepopulation studied. LDL particles
carry the "bad cholesterol" through the bloodstream.Smaller LDL particles
may more easily become trapped in blood vessel walls thanlarger ones, possibly increasing risk for a...
Quarterly News Tipsheet -- Research Highlights From Pacific Northwest National Laboratory
...applications, including laser desorptionof aerosol particles
for atmospheric monitoring. This trap also improves the quality of data that can be obtained in a singlemeasurement, thus reducing the amount of averaging required for high qualitymeasurements.Pacific Northwest scientists tested the ion trap in 1998....
Mixing Radiation, Minerals, Toxic Waste Could Be Cleanup Boon -- Or Kaboom
...When mixed, HCB and similar chemicals tend to coat particles
of minerals orsalts. The study shows that when the particle is an oxide, like alumina, gammarays interact not with the chemical but with the oxide, activating it so that itcan catalyze the reaction that breaks down the chemical. Gray says the finding...
New Evidence On How Prions Turn Fatal
... say a newly determined structure of thebiological particles
called prions may help explain how they cause infectiousdeadly diseases. Aberrant prions cause scrapie in sheep, bovine spongiformencephalopathy (BSE or "mad cow disease") in cows, and various afflictions inpeople. The scientists say their finding ...
Sandia, University Of Montana Researchers Try Training Bees To Find Buried Landmines
... as bees forage for nectar and pollen, theyattract particles
of dust, soil, and pollen to their fuzzy,statically charged bodies and bring samples back to thehive. In doing so they provide a chemical survey of an areaextending a mile or more from the hive in all directions. "Bees are like flying dust mops," say...
Researchers Identify Molecule That May Be Key In Pheromone Processing
...ceptor. When they open, ion channels admit charged particles
into the cells, alteringthe cells' electrochemical makeup. In nerve cells like those in the VNO andMOE, opening of an ion channel is key to transforming a chemical signal into anerve impulse. In their analysis of VNO and MOE tissues from rats, ther...
Structure Of HDL Cholesterol Determined
...r for reprocessing or elimination. In thisway, HDL particles
are thought to play a crucial role in reducing the...e. Prior to this study, many scientiststhought HDL particles
consisted of two-layered disks of fatty molecules, orlipids, surrounded by a "picket fence" of prote...
Magnetic Fluids More Complex Than Previously Thought
...gnetic. "In the absence of a magnetic field, these particles
are randomly dispersedthroughout the liquid," says... they are exposed to amagnetic field, however, the particles
turn into tiny magnets and rapidlyform into long chains. A high magnetic field turns the suspension ...
Massive pollution documented over Indian Ocean
...nceFoundation, is investigating how tiny pollutant particles
called aerosols aretransported through the atmosph...The haze is caused by high concentrations of small particles
known asaerosols that are usually less than a few micrometers in diameter. Comprisedprimarily of so...
Home owners may sleep better because student overcame her fear of insects
...h their digestive system. We found they can filter particles
down toa micron, which is very small," explains Fell. Carpenter ants do not eat the wood they carve up. "We learned that food has tobe in liquid form or a form they can extract as liquid, such as a gel." Another important facet in understan...
Lab on a chip? Cheap, disposable UD biosensor uses gold-on-plastic design
...idge" between the electrodes, Velev says. Thelatex particles
can then pick up any targeted molecules in a sampl...art of the humanimmunoglobulin. Adding coated gold particles
to the sample turns the latex bridge into aconductor, thereby short-circuiting the electrodes. (To a...
When is a pollinator not a pollinator? Tales from an insect crime scene...
...fer between the scarlet giliaplants by placing dye particles
on flowers to imitate pollen. The number of dyeparticles deposited on flowers were compared in plants with low and high robbingrates. This was associated with the amount of pollen transferred bypollinators. The researchers found that highly-robbed...
African dust called a major factor affecting southeast U.S. air quality
... summer and constitute up to one half ofbreathable particles
in the air over Miami, Florida, according to a new...late matter) standard is based on the totalmass of particles
measuring 2.5 microns or less that may be observed in a 24hour period. Particles of this size can pe...
When opposites don't attract: Understanding why may support new biomaterials, Science paper suggests
...amines the interactions betweenmicroscopic charged particles
and oppositely charged synthetic membranes. One would expect that the particles
would adhere and cover the entire membranesurface. However, the experiments show that, frequently, o...
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