Tag: "forces" at biology news
Next phase reached in definition of Mars Sample Return mission
...space exploration, and has been one of the driving forces
behind the efforts to explore the planet Mars. This investigation, key to unlocking the 'big' question regarding life in the universe, is increasing in pace and is already beginning to provide answers. This is also one of the leading scientific threa...
Oh, what a feeling - dancing on the ceiling!
...Stanislav Gorb used optical sensors to measure the forces
applied by each leg of a fly whilst walking freely on a smooth ceiling. They found that the best attachment force occurred when at least one leg from each side of the fly's body was in contact with the surface. These principles were then proven using...
Researchers explore new technique to treat high blood pressure, kidney damage
...he rate of pressure in the arteries when the heart forces
blood into the vessels over the rate of the heart at rest, is considered high if it rises above a 140/90. Cold weather can elevate blood pressure. Because of this, heart attacks and strokes are often more common in winter. To simulate cold-induced hy...
Inflammation and drugs to control this activity studied in a variety of tumors sites
...fectious agent, for example, the body calls on the forces
of inflammation to fight and defeat the intruder. But when the biochemical processes of the immune system are either misdirected or chronically turned on, inflammation can lead to adversity, including some forms of cancer. For this reason, scientist...
Flying tip of bees: Leave your legs dangling!
...o achieve maximal speed, and the legs produce lift forces
to either side that help prevent the bee from roll...aving the legs extended generates stabilizing lift forces
and helps reduce the moment of inertia and the slow rolling, similar to when a spinning figure-skate...
APS lecturer shows rare video of 'teacher-student' immune cell interactions in live animal
... Andrian videos, as the immune system marshals its forces
to fight off a new infection. His laboratory hones in on how dendritic cells -- professional antigen-presenting cells -- teach T cells to respond to an infection. "This had never been observed in a live system before we obtained it," von Andrian said...
First direct mechanical communication of mitochondria, cardiomyocyte nucleus shown
...ate a sensitivity of nuclei to external mechanical forces
and suggest that nuclear deformation could influence gene expression processes. Thus, we hypothesize that drugs or intracellular conditions inducing mitochrondrial swelling could by mechanical means influence gene expression. "More studies are neede...
The Amazon in 2050: Implementing the law could save a million square kilometers of rainforest
Economic and political forces
are rapidly transforming the forests of the Amazon...ussed is a business-as-usual scenario in which the forces
of destruction continue unopposed. Specifically, this scenario (abbreviated as BAU) assumes that the...
Biggest physics meeting of the year
...echnique. The simulation approach employs magnetic forces
that can be directed to pull in tandem with gravity's forces
to create enhanced gravity or to push in opposition to gravity to create weakened and even inverted ...
USC, Rice to develop bacteria-powered fuel cells
...outhern California and Rice University are joining forces
to create bacteria-powered fuel cells that could power spy drones that fit in the palm of a hand. The Air Force has long been interested in micro-scale air vehicles some as small as insects but it has been stymied by the lack of a suitable, compact...
Subsidized killing of carnivores fails to protect US sheep industry
...Conservation Society (WCS), which says that market forces
not predators are responsible for the drop-off in sheep numbers. The study, which appears in the latest issue of the journal Conservation Biology, says that more than 80 years of federally subsidized predator control with a total investment of more...
To avoid doing more harm than good, land trusts must consider market forces when acquiring property
...n should consider the impact of real estate market forces
when acquiring land, according to a new study to b..., it is time for conservationists to heed economic forces
with the same vigor they heed biodiversity trends," Daily says. "The ecological value of lands outsi...
Computer simulation hints at new HIV drug target
...ed are governed by Newtonian physics, the electric forces
among atoms, the complementarity or clash of the different shapes that the enzyme takes, and penalties or bonuses for creating or relieving geometric strain. The scientists depict the protease enzyme in a brightly colored cartoon, with features that ...
Pesticides in the nation's streams and ground water
...response to such factors as regulations and market forces
and findings from this decade-long study need to be examined in relation to changes in use during and after the study. For example, levels of the herbicide alachlor declined in streams in the Corn Belt (generally including Illinois, Indiana, Iowa, Ne...
Study reveals mass migration of mormon crickets driven by hunger, fear
... and experimentation to determine that two driving forces
are behind the migration: a need for protein and a fear of cannibalism. Their results reveal a different model for collective motion, with the crickets' migration in effect a forced march. The constant threat of cannibalism from the rear appears to...
Story tips from the Department of Energy's Oak Ridge National Laboratory
...l advances along with strong societal and economic forces
make the timing perfect for development of biorefineries for the production of biofuels and biomaterials from renewable energy crop resources. The integration of bioenergy crop development and biorefinery conversion technology will "lead to a new man...
Ernst Mayr's theory illustrated in genetic epidemiology studies
...g interaction between natural selection and random forces
in a founder population. "Mayr felt that the inter...his model, it's the interaction of the random that forces
the natural selection that creates the evolutionary change," Templeton said. "Although the initial ...
Less is more, gene study shows
...long ago, it was hard to pinpoint the evolutionary forces
behind the loss. So the researchers focused their attention on another human-specific pseudogene, CASPASE12. Work by other researchers had shown that the gene has completely lost its function in non-Africans, but a small percentage of Africans and ...
Environmental impact statement planned for USAMRIID facilities at Fort Detrick
...therapies, and diagnostics -- to protect our armed forces
and citizens from biological threats. The bioconta...luation for medical solutions to protect our armed forces
from biological threats they may encounter on the battlefield. In addition, USAMRIID has been assign...
Clawed frog helps Fanconi anemia research make leaps
...primarily affects children. The lab already joined forces
with other labs to isolate several of the dozen genes known to exist in the Fanconi pathway. "Really, there are not a whole lot of labs using the Xenopus extract approach yet," Stone said. "There are so many experiments we'd like to do now." For exa...
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