science + technology news

Polymer breakthrough to boost smart drugs

September 12, 2005

Smart plastic films programmed to release a precise sequence of treatments are poised to revolutionize drug delivery, thanks to a breakthrough in polymer chemistry at MIT.

The films could be used to coat implants such as artificial hips and tissue scaffolds to deliver phased release over a period of hours or weeks.

The method calls for depositing very thin polymer films on objects of any shape. The scientists… read more

In the Forests of RNA Dark Matter

September 12, 2005

RNA is emerging as more important than previously thought. Its conformational versatility and catalytic abilities have been implicated at the very core of protein synthesis and possibly of RNA splicing.

And the dynamics of the RNA messages passed between nucleus and cytoplasm provide a complex and sophisticated layer of regulation to gene expression.

(Requires paid subscription)

Nanohelix structure provides new building block for nanoscale piezoelectric devices

September 9, 2005

A zinc oxide nanostructure that resembles the helical configuration of DNA could provide engineers with a new building block for creating nanometer-scale sensors, transducers, resonators and other devices that rely on electromechanical coupling.

Based on a superlattice composed of alternating single-crystal “stripes” just a few nanometers wide, the “nanohelices” get their shape from twisting forces created by a small mismatch between the stripes and are produced using a vapor-solid… read more

Nanochip emulates human brain

September 9, 2005

Mobile phones could one day have the memory capacity of a desktop computer thanks to a microchip that mimics the functioning of the brain.

Researchers are developing a new 3-D chip design using spintronics and a complex interconnected network of nanowires, with computing functions and decisions performed at the nodes where they meet — an approach similar to neurons and axons in the brain.

It combines the storage… read more

Clever artificial hand developed

September 9, 2005

Scientists have developed an ultra-light limb that they claim can mimic the movement in a real hand better than any currently available.

The Southampton Remedi-Hand can be connected to muscles in the arm via a small processing unit and is controlled by small contractions of the muscles which move the wrist. It uses six sets of motors and gears so each of the five fingers can move independently.… read more

Backpack generates a powerful punch

September 9, 2005

A backpack that generates electricity as its wearer walks generates up to 7 watts, more than enough to power cellphones or other devices, while reducing backpack load forces on walkers.

Brain May Still Be Evolving, Studies Hint

September 9, 2005

Two genes, microcephalin and ASPM, involved in determining the size of the human brain have undergone substantial evolution in the last 60,000 years, researchers say, leading to the surprising suggestion that the brain is still undergoing rapid evolution.

New Google ‘Evangelist’ to Spread Applications

September 9, 2005

Google has hired Internet pioneer Dr. Vinton G. Cerf as “chief Internet evangelist.”

“The Internet has a billion users, and we have 5.6 billion to go,” Dr. Cerf said. “Each will come to the Internet in different ways, like wirelessly, and Google needs to be receptive and adaptive to those different circumstances.”

Molecules used as information processors

September 8, 2005

Chemists at Queen’s University Belfast are exploring the capabilities of molecules that act like conventional computers but in spaces only a few nanometers across.

Molecular information processors placed in nano-spaces can gather, process and supply valuable data on how chemistry and biology function at this tiny scale. Molecules can also be used as information processors in medical and other applications.

Source: Engineering and Physical Sciences Researchread more

Nanotech researchers build brawny molecules

September 8, 2005

A breakthrough in nanotechnology could hasten the development of molecular machines that can act as artificial muscles or drug delivery systems in the body.

Chemists at Edinburgh University used ultraviolet light to stimulate human-made molecules to propel small droplets of liquid across flat and sloped surfaces.

The achievement, according to the researchers, is equivalent to a conventional machine lifting an object to more than twice the height of… read more

Nuclear stockpiles could create 300,000 bombs

September 8, 2005

The world has made enough explosives for more than 300,000 nuclear bombs, according to the latest scientific assessment of countries’ nuclear stockpiles.

Experts are worried that terrorists could steal enough to trigger a nuclear catastrophe.

Odd behavior and creativity may go hand-in-hand

September 7, 2005

New research on individuals with schizotypal personalities — people characterized by odd behavior and language but who are not psychotic or schizophrenic — offers the first neurological evidence that they are more creative than either normal or fully schizophrenic individuals, and rely more heavily on the right sides of their brains than the general population to access their creativity.

Deceit of the Raven

September 7, 2005

Science is chipping away at the case for human uniqueness, showing that animals and machines are more like us than we believed.

What happens, as these trends continue, to the familiar guideposts for deciding what is human?

Safecrackers open up the “deep Web”

September 7, 2005

Glenbrook Networks says it has a way to tunnel far into the “deep Web” and extract Web pages that are largely unreachable by most search engines because they are stored in databases that Web crawlers can’t access.

High Doses Of Vitamin E Boost Rat Survival Rate 40%; Brain Function, Neuromuscular Gains

September 7, 2005

Mice given high doses of vitamin E showed a 40% increase in median lifespan and increases in the ability to perform tests measuring neuromuscular performance and cognitive exploratory activity.

The results support the “free radical” theory of aging.

close and return to Home