Tag: "particles" at biology news
Team finds cell gene that helps viruses multiply
...make viral proteins to be assembled into new virus particles
which, in turn, go on to infect other cells," Díez says. Identifying the contributions made by host cells to invading viruses is a critical frontier in virology. Until now, intracellular factors involved in RNA viral infect...
Targeted Genetics presents advances in systemic gene delivery technology
...ipid shell. The resulting LPD formulation contains particles
of defined size, which have enhanced stability and gene transfer efficiency. Pre-clinical experiments in non-tumor bearing mice have shown that the LPD system is able to deliver genes systemically through intravenous administration. Backgroun...
Adding acetone to compost remediates chunk TNT contaminated soil
...n composting method to clean the soil leaves small particles
of the potentially carcinogenic substance. Researc...gunnery range. As a result of military activities, particles
of TNT ranging in size from about 56 grams to less than a hundredth of a gram contaminate about a th...
UC Irvine researchers discover how airborne sea salt particles may influence air pollution levels
...interactions have discovered how airborne sea salt particles
may be involved in helping to determine the levels...son-Pitts said. "Our study suggests that sea salt particles
may be a factor that needs to be taken into account in assessing levels of greenhouse gases and air ...
Gene defects tied to inability of cells to repair DNA damage
...mation of free radicals, short-lived highly active particles
that occur naturally during metabolism. These are also introduced into the body through smoking, inhaling environmental pollutants, or exposure to the sun's ultraviolet (UV) radiation. From numerous studies, free radicals are known to interact readil...
Oral exposure to anti-oxidant glutathione could help prevent flu infections
... They also have found that activation of the virus particles
could be controlled by oxidation reduction reactions. Knowing that glutathione is an anti-oxidant and that it is present in the mouth and nose linings, Dr. Jones exposed normal human airway epithelial cells in culture to flu virus either wi...
Mountains of variables: The effect of landscape features on atmospheric deposition
... retain needles year round. Those needles capture particles
more efficiently than do deciduous leaves. The pollutants that are trapped by these canopies are then deposited to the forest floor, when the captured precipitation falls to the ground and when the tree loses it needles. The research team in this s...
Potential gene therapy carriers created that mimic viruses, without the risk
...y in St. Louis have created tiny synthetic polymer particles
that mimic viruses and show potential for a new di...ial of the knedels as bio-scavengers. Because the particles
also are chemically similar to lipoproteins, which comprise cholesterol, it might be possible to con...
Ultrasensitive method for the diagnosis of prion diseases (Creutzfeldt-Jakob disease and BSE)
...isease (CJD) and BSE. By this method, single prion particles
can be identified inbody fluids. For the first tim..., the Gttingen scientists were able to label prion particles
in cerebrospinal fluid with fluorescent dyes. The single prion particles
could then be identifed wit...
Can heavy alcohol use lead to some kinds of cancer?
...foliated epithelial cells, most bacteria, and food particles
away from the teeth. Salaspuro's study proposes that the parotid glands are able to metabolize alcohol into acetaldehyde. Oral microflora may also produce acetaldehyde. Every individual has about 300 hundred different bacterial species in their mo...
Scientists record movement of herpes simplex virus in nerve cell
...to the squid axon. The study showed that the viral particles
travel at an "enormously" fast and consistent speed of 2.2 microns per second, which indicates a single mechanism for movement, Bearer said. "For a long time, it was believed that herpes traveled back to the central nervous system by infecting other ...
Life from the skies
...are also the same size as bacterial cells, as only particles
between 0.1 and 5 micrometres across make it to th... other way to test the theory. The size of aerosol particles
depends on gravity and atmospheric pressure, so it's possible to calculate how big they'd be on othe...
Scientists look to nature to cut greenhouse emissions
...ld more efficiently collect additional heavy metal particles
from the exhaust stream....
Summer 2000 techNotes
...n of chromium causes the material to cling to soil particles
and not migrate down to the water table. Without conversion, the toxic form of chromium moves quickly through soil into groundwater and possibly into rivers, where it can harm juvenile fish. Early demonstration of the technology shows potential for...
Trans-pacific air pollution is worse than was suspected,says new study
...fy the exact sources anddestinations of those tiny particles
of dust, sulfate andorganic matter. This information does not exist for much ofAsia and is badly needed by scientists trying to generatereliable predictions of global climate change. "Previous research has shown that every spring there aremassive dus...
Tiny particles of dirt really can kill
... and the US are dying young because of microscopic particles
in the air. Most of the concern about particulat...f the Harvard "Six Cities" study, which identified particles
with a diameter of less than 10 micrometres (PM10) as a threat to public health. A team of researche...
Catalytic converters fix one pollution problem, cause another
...ronmental Protection Agency recently targeted such particles
for regulation under Clean Air Act standards on the grounds that they endanger human health. Opposition to EPA's proposed regulation led to a legal case that the U.S. Supreme Court will hear this term. The researchers, led by Robert Harley, Ph.D., ...
UF researchers: technique cuts pollution from burning treated wood
...er, the arsenic vaporizes and forms extremely tiny particles
-- less than 1 micron in diameter, or more than 10...ller than the diameter of a human hair. These tiny particles
cannot be perfectly captured in traditional pollution control devices. The UF technique introduces...
The ultimate pocket protector--radiation detection made easy
...dles of massless energy called gamma rays and tiny particles
called neutrons. The device, called a dosimeter, ...r directions. "It's harder to detect the neutron particles
because they don't interact with matter in the same way that the gamma energy does," says Aryaeineja...
Faster coagulation rates found in natural systems could impact industrial processing
...f these groups collide with and capture additional particles
millions of times faster than predicted by existin... have been based on the analysis of single "ideal" particles
such as a sphere. However, Logan points out that most real aggregates of interest form particles
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