Biotech

This smiley face tattoo is monitoring you

A Ph.D. student at the University of Toronto is using the same transfer paper currently affixing temporary tattoos to kids -- in conjunction with a common screen-printing technique -- to develop a medical sensor that keeps tabs on a person's exertion by monitoring the skin's pH levels.

Similar devices, which are called ion-selective electrodes (ISEs), are already common among athletic trainers and medical researchers to help spot fatigue, dehydration, or even metabolic diseases. But they tend to be bulky and don't stick well to sweaty skin.

The new sensor stays put and doesn't look so, … Read more

Got jet lag? Re-Timer eyewear could help

About to fly halfway around the world? You could pop some melatonin in hopes of easing your inevitable jet lag. Or you could don a pair of odd-looking goggles and pretend you're modeling the Ikea line of Geordi La Forge eyewear.

Re-Timer, a lightweight wearable device invented to reset the body's internal clock, launched last week. It emits a soft green light onto the eyes to stimulate the part of the brain responsible for regulating the body's 24-hour clock.

Light received by photoreceptors in our peepers sends a signal to our brains telling us to wake up and smell the alertness. But circumstances including jet lag, irregular work shifts, and lack of sunlight during winter months can mess with the light we need to maintain a well-timed body clock and natural energy levels.

Enter the Re-Timer, which is meant as an alternative to sleep-assisting drug therapy. … Read more

Nanotech device could step in for dogs to sniff out explosives

When it comes to detecting a wide range of extremely faint scents, including the primary vapor that emanates from TNT-based explosives, dogs are the gold standard. But researchers out of the University of California at Santa Barbara, report in the journal Analytical Chemistry that they just may have man's best friend beat -- in the form of a fingerprint-sized silicon microchip.

"Like a person, a dog can have a good day or a bad day, get tired or distracted," Carl Meinhart, a mechanical engineering professor who led the research, said in a school news release. "We … Read more

3D printing: The hype, the hopes, the hurdles

MARANA, Ariz. - Three-dimensional printing: hype, or hope?

That's the question industry leaders sought to answer at the Techonomy conference here in the sunny greater Tucson area. A panel of experts -- Geomagic's Ping Fu, Shapeways' Peter Weijmarshausen and PARC's Stephen Hoover, with CNET's own Paul Sloan moderating -- discussed the promises, pitfalls and potential of a technology that allows almost anyone to turn a digital file into a perfect copy of a physical object, from puzzle pieces to airplane wings, in materials such as plastic, metal and rubberlike polymers.

Can 3D printing change the world? … Read more

New e-skin is sensitive to touch and self-healing

The human skin, with all its frailties, turns out to be difficult to recreate, let alone improve on. The main challenge: It manages to be both self-healing and sensitive to the touch, enabling it to send vital information to the brain about temperature and pressure.

But chemists and engineers at Stanford say they are one step closer to developing an electronic skin that has both these properties, and they report this week in the journal Nature Nanotechnology that it could help lead to smarter prosthetics and more resilient, self-repairing electronics.

Their central task was to find a self-healing material (a … Read more

BeBionic 3: Watch a highly advanced bionic hand in action

Several months ago, my colleague Tim Hornyak wrote about the BeBionic 3 myoelectric prosthetic hand, a landmark prosthesis that enables a spectacular range of Terminator-like precise gripping and hand maneuverability.

A video making the rounds this week stars 53-year-old Nigel Ackland -- a wearer of the device -- who shows us that we've come extraordinarily far in prosthetic research, perhaps shockingly so if you don't keep up with the subject. … Read more

MIT figures out how to power tiny devices with... the ear

Devices that monitor inner ear activity could eventually be powered by the ear itself, according to research detailed in the current issue of the journal Nature Biotechnology by scientists from MIT, Massachusetts Eye and Ear Infirmary (MEEI), and the Harvard-MIT Division of Health Sciences and Technology (HST).

They say that for decades we have known the inner ear houses its own natural battery, but this is the first demonstration of its ability to power something external without compromising hearing.… Read more

Sensor promises disease detection with naked eye

British scientists have come up with a super-sensitive prototype sensor that lets doctors detect early stage diseases with the naked eye, an innovation that could prove valuable in countries that lack the resources for expensive diagnostic equipment.

The sensor, created at Imperial College London, relies on nanotechnology to analyze serum derived from blood samples.

A positive reaction to p24, a protein that indicates early HIV infection, or PSA, a protein that at certain levels can indicate prostate cancer, generates irregular clumps of nanoparticles that emit a blue color in a solution kept in a disposable container.

A negative reaction, however, … Read more

Detecting schizophrenia: The eyes have it

More than a century ago, doctors first realized that people with psychotic illnesses also suffer from impaired eye movements. Now researchers out of the University of Aberdeen in the U.K. have taken that observation and truly put it to the test with high resolution cameras and video software.

The result: a computer model based on a series of simple eye-tracking trials that has distinguished schizophrenics from healthy control subjects with 98.3 percent accuracy.

"It has been known for over 100 years that individuals with psychotic illnesses have a variety of eye movement abnormalities, but until our study, … Read more