Tag: "particles" at biology news
Engineers develop technology to reduce industry emissions
...d membrane electrostatic precipitator collects the particles
before they can be released into the air via the s...ssociate professor of mechanical engineering. "The particles
otherwise can't be efficiently treated by conventional electrostatic precipitators that use steel pl...
Researchers discover new way to block HIV transmission by removing cholesterol from cell membrane: Hopkins study finds HIV requires cholesterol to infect
...e material. They then exposed these cells to virus particles
and cells infected with HIV. To their surprise, the scientists discovered that cholesterol was not only crucial for the virus' exit but also for its entrance into a cell. When exposed to the virus, treated cells resisted HIV infection. Upon further...
Feeding fish use crossflow filtration
...t through gill slits in the side of the head. Food particles
in the water are trapped and swallowed. Fish don't... biologists assumed that the rakers collected food particles
as water flowed through them. This sieving model raised a number of questions, such as why the filt...
Harnessing the autoimmune response
...iral components, to form a population of viruslike particles
(VLPs). They have now developed a versatile technique by which peptides can be conjugated to VLPs, a form in which even normally nonimmunogenic self epitopes can elicit high titers of specific antibodies. Vaccination of mice with VLP-conjugated TNF...
Ohio State chemist wins national award for study of reactive intermediates
...ch and I are working on methods to kill pathogenic particles
in blood products before they can be transfused, said the chemist. We are studying compounds which bind pathogenic nucleic acid [the building blocks of genetic material], absorb visible light, generate reactive intermediates which damage the nucleic...
Dust from Africa leads to large toxic algae blooms in Gulf of Mexico, study finds
... generates clouds of dust that originate from fine particles
in the arid topsoil. Easterly trade winds carry the dust across the Atlantic Ocean and into the Gulf of Mexico. "Because iron is one of the most common elements in most soils, a certain percentage of the dust contains iron," said Lenes. The study us...
Researchers explore wood smoke's threat to Great Lakes environment
...tive 24-hour sampling periods. They then extracted particles
from the filters and exposed each sample extract to a population of a hundred water fleas, which are used as a standard model for testing wastewater toxicity. For each site sampled, extract concentrations as low as 10-15 milligrams of particulate ma...
Slight molecular tweak, and flu virus becomes a killer
...eadly to mammals as it is to birds. As few as two particles
of the virus isolated from human victims of the 1997 outbreak were enough to kill a mouse, Kawaoka says. The less virulent form of the virus, isolated from patients who suffered only mild respiratory symptoms, was also less pathogenic in mice. Flu v...
Wind-borne pollutants may travel thousands of miles
...in goes first through a filter that holds back the particles
present in the rain and then through an absorbent ...sured The air sampler contains a filter to collect particles
in the air (dust) and polyurethane foam plugs that trap gaseous air pollutants. Wade and his collabo...
Smallest silicon particles light way for new sensors, materials
...Energy is then emitted in the form of light as the particles
move back to their former state. In the process of...erstood in physics, also occurs in nanocrystalline particles
of some other materials such as titanium dioxide, which is used in solar cell applications. Using wh...
Virtual lung models every breath you take - and its impact
...model is sufficiently detailed to track individual particles
as they move within the rats respiratory system. ...tegrated information to show how airflows carrying particles
might move inside the imaged respiratory tract during breathing. The grid program allows us to t...
Student discovers well-preserved embryo in dinosaur egg
... chalk sediments on the ocean floor. Because chalk particles
are so tiny, fossils preserved in them reveal much more delicate features than those preserved in grittier sediments. Chalk's alkalinity also helps buffer the fossils against destructive acids. The egg is believed to be the only one in the world p...
NASA unveils spectacular suite of new global data products
...we have an unprecedented ability to separate small particles
that result from human activities and biomass burning from coarse particles
that result naturally, such as sea salts and desert dust." According to King, MODIS allows scientist...
Anthrax - Trail of terror
...US. Important clues also come from the size of the particles
used in the attacks.According to reports last week, they had been milled down to a few micrometres, which is optimal for causing the inhalation form of the disease. "The terrorists at least had access to considerable know-how," concludesMichael Power...
Anthrax dectectors are coming
...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 to excite light-absorbing substances that release energy as heat. Heat-induced solvent expansion genera...
Dupont donates patents to UCSD
... Tacky Dot as a way to rapidly and precisely mount particles
on surfaces. So-called tacky, or adhesive, dots, comprised of photopolymer materials, are created in precise patterns, so the mounting process can be as simple as dusting the sample onto the surface saving valuable time and materials. The technolog...
Rutgers-led research team finds Hudson River is cleaning itself
...rinteracting with other metals or minerals to form particles
that end upin sediment. There, microscopic organisms drive processes that tend totransform the metals into less toxic forms. When storms, spring runoff and tidal forces stir up the sediment andsuspend it in the river's water column, the already alte...
Compounds in garlic fight malaria and cancer
...o absorb damage caused by oxygen and other harmful particles
when needed. The glutathione system is of partic...s or malaria-infected cells, because these harmful particles
are natural by-products of metabolism. Ajoene, the disulfide that naturally occurs in garlic, is...
Science: nanoscale 'Trojan Horse' attacks cancer cells from within
...nd produces extremely small but potent radioactive particles
that destroy those cells without apparent toxic si...iving off alpha particles--very small, high-energy particles
that rip through the cell and destroy it. Actinium's decay produces a series of three "daughter" ato...
Nanoparticles in air bad news for people
OAK RIDGE, Tenn., Tiny airborne particles
too small to see are more plentiful and may pose a...e National Laboratory researcher studying airborne particles
in the Great Smoky Mountains and beyond. Recent evidence in scientific literature suggests that a re...
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