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Tag: "force" at biology news

'Sharp' older brains are not the same as younger brains

...had brains that had lost the ability to adjust the force of those synaptic communications, the older rats whose memories remained sharp still had that capacity. Interestingly enough, the successful older rats also relied far less than did younger rats on a synaptic receptor that is linked to a common mecha...

Marathon of nano-sprinters

...r motors move against an external load force, this force is shared among the pulling motors. One obvious co...ment of the cargo is slowed down. In addition, the force felt by each pulling motor strongly increases the unbinding probability for such a motor. Furthermor...

Role of microRNA identified in thyroid cancer

...s called microRNA (miRNA) is a powerful regulatory force in the development of cancer and other diseases. The study is published online in the Dec. 19 Proceedings of the National Academy of Sciences. Scientists already know that some people inherit a predisposition to developing papillary thyroid cancer (...

DNA self-assembly used to mass-produce patterned nanostructures

...ten with a protein that can be seen through atomic force microscopy (AFM). An image of the grids with the letter patterns is available at http://www.dukenews.duke.edu/mmedia/hires/dna.jpg >. The scientists, members of the Triangle-area TROIKA collaboration to construct computing devices using DNA, w...

Why Christmas trees are not extinct

...ic tubing, used an elevated reservoir's gravity to force water into one end of each twig, and then used an electronic balance to weigh water dripping out the other end. Then, based on the number of conduits and valves in twigs and their known dimensions, the biologists calculated the resistance to water fl...

Pulp mill devastates swans' sanctuary in Chile

...Although a series of lawsuits and other actions to force stronger action against the company have not so far succeeded, the case is now being heard by the Interamerican Court of Human Rights. "The sanctuary has suffered so much damage that we won't know, without more research, how long it may take to rest...

MIT researcher finds neuron growth in adult brain

...ering," Nedivi said. She believes the results will force a change in the way researchers think about how the adult brain is hard-wired. Nedivi had previously identified 360 genes regulated by activity in the adult brain that she termed candidate plasticity genes or CPGs. Her group found that a surprising...

Breath of the dragon: ERS-2 and Envisat reveal impact of economic growth on China's air quality

...nteractions with natural phenomena are the driving force in global climate change. "Next we are hoping for follow-up satellite missions, in particular from geostationary orbit to monitor atmospheric pollution, which has a strong diurnal variation and thereby determine objectively the changing atmospheric...

Einstein scientists discover how protein crucial for motion is synthesised at the right place in the cell

...vade other areas of the body. So a drug that could force tumor cells to express ZBP1 might prevent cancers from spreading." In addition to Dr. Singer, other Einstein researchers involved in the study are Dr. John Condeelis, professor and co-chair with Dr. Singer of Einstein's Department of Anatomy and Str...

Researchers learn how blood vessel cells cope with their pressure-packed job

...d to understand how cells can sense the mechanical force and achieve this beneficial effect through the activation of Rho, and we also need to identify other proteins that may be involved in this feedback control mechanism." ...

Master regulatory gene found that guides fate of blood-producing stem cells

...bone-marrow failure and for transplantation, or to force the cells to differentiate, in the case of leukemia, where too many HSCs are made. ...

UT Southwestern researchers develop screening test for cells that activate immune system

...tep toward developing a new class of vaccines that force or trick the natural immune system to kick on, or initiate an immune response that can be copied and initiated artificially. Other UT Southwestern researchers from dermatology involved in the study were Dr. Yasushi Ogawa, postdoctoral researcher, an...

Dalai Lama, top scientists to discuss science & clinical applications of meditation

...hese conferences. The Institute has been a driving force in the new and widespread acceptance of meditation in the West. Adam Engle, Chairman and co-founder with the Dalai Lama of the Mind & Life Institute, said, "Various applications of meditation have already made their way into the mainstream of me...

Molecular mechanism of feather formation found

...r-inhibitor model, Harris injected retroviruses to force the expression of either Shh or Bmp2 into the skin of six-day-old chick embryos. The virus infected only small patches of cells and allowed Harris to locally examine the effects of the treatment on barb patterning during feather development. To asse...

Computers close in on protein structure prediction

...uter then uses a detailed physical chemistry based force field which favors close packing of atoms and hydrogen bonding to more accurately compute the energy of the structure. "What seems to be critical is the packing of the molecule," Baker said. "The protein fits together perfectly with no holes in the ...

Muscle repair: Making a good system better, faster; implications for aging, disease

...ry muscle force. After 10 days, PAI-1 null muscle force remained significantly greater than WT (55% versus 40% of pre-injury force), with uPA null mice still showing little, if any, recovery. By day 20, the three mouse strains' relative muscle strength followed a similar pattern: PAI-1 null 90%, WT 75% an...

Can two killers make a cure?

...o it cannot replicate. All attempts in the lab to force such viruses to regain the ability to replicate have failed. Even if this did happen in the body, the resulting virus would resemble HIV, as the hybrid contains no Ebola genes - and HIV cannot infect lung cells. If it did get into the blood, where no...

Hopkins scientists uncover 'tags' that force proteins to cell surface

...ternal "shipping labels" that allow -- and perhaps force -- hundreds if not thousands of proteins to get to... you can't use this screening technique. If we can force proteins to the cell surface, we can overcome obstacles that have prevented laboratory study of some...

Chemical 'band-aid' prevents heart failure in mice with muscular dystrophy

... a device to allow the simultaneous measurement of force and intracellular calcium concentration in individ... on one fiber measures the amount of stretch and a force transducer on the other fiber measures the contractile force of the cell in response to that stretch...

Lance Armstrong through a physiological lens: hard training boosts muscle power 8%

...f maximum power and reduce the muscle and pedaling force required for each cycling stroke," it noted. As body matures, it gets "smarter" Coyle said increased muscle efficiency means that "for the same amount of cardiovascular and lung stress Armstrong is producing 8% more power, and yet producing less he...

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