Biosingularity

Archive for November 2007

Vase or face” When presented with the well known optical illusion in which we see either a vase or the faces of two people, what we observe depends on the patterns of neural activity going on in our brains.

“In this example, whether you see faces or vases depends entirely on changes that occur in your brain, since the image always stays exactly the same,” said John Serences, a UC Irvine cognitive neuroscientist.
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According to a new study published in Journal of Thrombosis and Haemostasis, regular participation in sports reduces the risk of developing blood clots by 39 percent in women and 22 percent in men.
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Acclaimed stem cell researcher Shinya Yamanaka, MD, PhD, has reported that he and his Kyoto University colleagues have successfully reprogrammed human adult cells to function like pluripotent embryonic stem (ES) cells. Because it circumvents much of the controversy and restrictions regarding generation of ES cells from human embryos, this breakthrough, reported in the journal Cell, should accelerate the pace of stem cell research.

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A team of physicists at the University of California, San Diego and biologists at Catholic University of America, Washington D.C. has shown that a tiny viral motor generates twice as much power, relative to its size, as an automobile engine. The finding explains why even very large viruses can self-assemble so rapidly.

In the study, published October 23 in the journal Proceedings of the National Academy of Sciences, the researchers used laser tweezers to measure the forces generated by a nanoscale motor that packs DNA into a virus during the assembly of an infectious virus particle. They discovered that the motor is considerably stronger than any known molecular motors, including those responsible for muscle contraction. The researchers say this power allows the virus to reel in its long genome with remarkable speed Read the rest of this entry »

MIT researchers have devised a novel way to create tiny colonies of living human liver cells that model the full-sized organ. The work could allow better screening of new drugs that are potentially harmful to the liver and reduce the costs associated with their development.
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Junk food junkies take notice. What you eat does more than influence your gut. It also may affect your brain. Increasing evidence shows that mom was right: You should eat your vegetables, and your blueberries and walnuts, too.

Scientists are confirming that this age-old adage is worth following. And new studies show that diet may have implications for those who suffer from certain brain ailments.

Diets containing two percent, six percent, or nine percent walnuts, when given to old rats, were found to reverse several parameters of brain aging, as well as age-related motor and cognitive deficits, says James Joseph, PhD, of the U.S. Department of Agriculture Human Nutrition Research Center at Tufts University in Boston.
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Neuroscientists have significantly advanced brain-machine interface (BMI) technology to the point where severely handicapped people who cannot contract even one leg or arm muscle now can independently compose and send e-mails and operate a TV in their homes. They are using only their thoughts to execute these actions.

Thanks to the rapid pace of research on the BMI, one day these and other individuals may be able to feed themselves with a robotic arm and hand that moves according to their mental commands.
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