force 2 2

Tag: "force" at biology news

Renegade RNA -- Clues to cancer and normal growth

... as an experimental tool. For example, he plans to force other microRNAs and siRNAs into the nucleus to turn off specific sets of genes. Mendell's team is actively hunting for additional hidden microRNA elements that control other aspects of their behavior in cells. They also are curious to figure out ...

Penn study on olfactory nerve cells shows why we smell better when we sniff

...ll is synchronized with inhaling. "The driving force for such synchronization remained a mystery for more than 50 years," says senior author Minghong Ma, PhD, Assistant Professor of Neuroscience. "These results help us understand how the mammalian olfactory system encodes and decodes odor information i...

Why aren't humans furry? Stone-Age moms could be the answer

...d of parental selection may have been an important force in evolution. If Stone Age people believed that hairless babies were more attractive than hairy ones, this could explain why humans are the only apes lacking a coat of fur. Harris suggests that Neanderthals must have been furry in order to survive th...

Shedding new light on proteorhodopsin

...bserved the response to light of the proton motive force (pmf), the electrochemical potential of protons across cellular membranes that bacteria use as the energy source to, among other functions, power the rotary flagellar motor which enables them to swim. "We found that if we shined light on our E. co...

Indicators for risk of heart disease are higher in passive smokers

...ng ban applying to all UK public spaces comes into force on July 1, 2007. ...

Yale biologists 'trick' viruses into extinction

...e logic by trying to trap viruses in habitats that force their extinction, according to a report in Ecology Letters. To avoid going extinct a population must not only survive, but also reproduce. Paul Turner , associate professor of ecology and evolutionary biology at Yale, tested the practicality of...

Is there a pilot in the insect?

...ced. Thus its optic flow regulator will constantly force it to reduce altitude so that the optic flow always remains at the reference value. The insect has to make a forced landing against the wind, but a safe landing, because it takes place at a vertical speed of zero. Reactions of this type to a headwind...

Study to explore using magnets to correct 'sunken chest'

...vestigator of the study. "We needed to apply a force to gradually remodel the chest wall without pierci...Harrison said. "A better idea is to apply a little force over a longer time, like the orthodontist moves your teeth." The use of the magnets has been deem...

Exploring the molecular origin of blood clot flexibility

...ed strands of fibrinogen molecules using an atomic force microscope. This alpha-helical coiled-coil "spring...t to unfold under the stress induced by the atomic force microscope," notes Brown. Once the origins of the mechanical properties of clots are well underst...

Carnegie Mellon University research shows how sensory-deprived brain compensates

...e, hear, smell or touch on one side of the body to force the same sense on the other side of the body to expand its activity within the brain, thereby remodeling it to perceive a limited sensation much better. This kind of "forced use" therapy is already applied in the clinic for patients with motor...

Dual gene therapy suppresses lung cancer in preclinical test

...Research paper reports that FUS1 works with p53 to force the lung cancer cells to kill themselves - a process known as apoptosis. Further analysis showed that the combination achieved greater cell suicide because FUS1 suppresses a gene that expresses a protein known to rapidly degrade p53, says senior a...

Einstein's tea leaves inspire new blood separation technique

...y a zero-velocity condition at the base, an inward force near the bottom of the liquid is generated, suppressing the centrifugal force there. Thus the microscopic particles spiral inward toward the bottom of the chamber like a miniatur...

Birth rate, competition are major players in hominid extinctions

...sources, they all required the crunching, grinding force of its teeth. Unfortunately, bush pigs and hyenas had great grinding and crushing teeth, too, and went after the same food. Paranthropus could not compete because it produced one offspring a year at most, while the others had large litters and coul...

Nanotechnology shows promise as next wrinkle fighter

...sive forces on a plane and redirect them. Once the force is reduced below the critical buckling strain, the film will not buckle. No buckles, no wrinkles. The nanoparticles in the film can be stress busters without affecting the neighboring layers. "The wrinkle-free films will automatically absorb or de...

Stretching DNA to the limit

... and his colleagues have conducted single-molecule force spectroscopy measurements on viral DNA, which show...of the DNA strands. Upon exposure to UV light, the force profile of the viral DNA changes dramatically in a dose-dependent manner. The force curve of intact ...

Short chromosomes put cancer cells in forced rest

... eventually - when the chromosomes get too short - force the cell to essentially commit suicide. Such cell death is natural, and when it fails to happen, the result may be unbridled cell growth, or cancer. The first generation pups born to these mice contained no telomerase and very long telomeres. The...

Engineering the heart piece by piece

...that it has achieved a doubling of the contracting force in just seven days, by stretching the BEHM at 1 Hertz. The growing of heart muscle, heart valve and blood vessel tissue in the lab also requires careful control of conditions such as temperature, oxygen and carbon dioxide levels, nutrients and pH...

Faster, low cost sequencing technologies needed to drive era of personalized medicine

...nded DNA probes attached to a chip. An atomic force microscope (AFM), like a caffeinated speed reader, can then rapidly scan the surface of the chip to see where DNA from the sample has hybridized to the probes. Wherever sample DNA binds to the probes, the sequence is registered. "Traditional appr...

Penn researcher shows that DNA gets kinky easily at the nanoscale

...mall lengths. They used a technique called atomic force microscopy to determine the amount of energy neces...ues used a technique called high-resolution atomic force microscopy to obtain a direct measurement of the energy it would take to bend lengths of DNA just a ...

Gold nanoparticles prove to be hot stuff

... picoscale mechanics by using lasers to both apply force to and track the position of fragile biomolecules ... for temperature-sensitive experiments or applying force to molecules. But the heating effect could be useful in raising local temperatures in certain experi...

1 2 3 4 5 6 7 8