Recently Added Most commented

Page 1 of 1,16312345678910last

Hawking offers new solution to ‘black hole information paradox’

New hope if you fall into a black hole
August 27, 2015

Nobel physics laureate Gerard 't Hooft of Utrecht University, the Netherlands, confers with Stephen Hawking at a weeklong conference at KTH Royal Institute of Technology on the information loss paradox. (photo credit: Håkan Lindgren)

Addressing a current controversy in physics about information in black holes, “I propose that the information is stored not in the interior of the black hole as one might expect, but on its boundary, the event horizon.”

The event horizon is a boundary around a black hole beyond which events cannot affect an outside observer, also known as “the point of no return” — where gravitational pull… read more

Omega-3 supplements fail to stem cognitive decline in the aged, NIH study shows

August 26, 2015

NIH study raises doubt about any benefits omega-3 and dietary supplements like these may have for cognitive decline. (credit: Photo courtesy of NEI)

While some research suggests that a diet high in omega-3 fatty acids can protect brain health, a large clinical trial by researchers at the National Institutes of Health found that omega-3 supplements did not slow cognitive decline in older persons.

With 4,000 patients followed over a five-year period, the study is one of the largest and longest of its kind. It was published Tuesday August 25 in… read more

3D-printed swimming microrobots can sense and remove toxins

Nanoparticles enable them to be self-propelled, chemically powered, and magnetically steered; could also be used for targeted drug delivery
August 26, 2015

3D-printed microfish contain functional nanoparticles that enable them to be self-propelled, chemically powered and magnetically steered. The microfish are also capable of removing and sensing toxins. (credit: J. Warner, UC San Diego Jacobs School of Engineering)

A new kind of fish-shaped microrobots called “microfish” can swim around efficiently in liquids, are chemically powered by hydrogen peroxide, and magnetically controlled. They will inspire a new generation of “smart” microrobots that have diverse capabilities such as detoxification, sensing, and directed drug delivery, said nanoengineers at the University of California, San Diego.

To manufacture the microfish, the researchers used an innovative 3D printing technology they developed,… read more

Anti-cancer vaccine uses patient’s own cancer cells to trigger immune responses

August 26, 2015

Cancerous melanoma cells shown with their cell bodies (green) and nuclei (blue) are nestled in tiny hollow lumens within the polymeric cryogel (red) structure. (credits: Thomas Ferrante, Sidi A. Bencherif / Wyss Institute at Harvard University)

A new biologically inspired “injectable cryogel whole-cell cancer vaccine” combines patient-specific harvested cancer cells and immune-stimulating chemicals or biological molecules to help the body attack cancer. It has been developed by scientists at Harvard’s Wyss Institute and Dana-Farber Cancer Institute.

This new approach is simpler and more economical than other cancer cell transplantation therapies, which harvest tumor cells and then genetically engineer them to trigger immune… read more

How to reprogram cancer cells back to normal

Restoring normal miRNA levels may potentially stop cancer growth, Mayo Clinic researchers have discovered
August 25, 2015

Schematic of cell adhesion (credit: Wikipedia)

A way to potentially reprogram cancer cells back to normalcy has been discovered by researchers on Mayo Clinic’s Florida campus.

The finding, published in Nature Cell Biology, represents “an unexpected new biology that provides the code, the software for turning off cancer,” says the study’s senior investigator, Panos Anastasiadis, Ph.D., chair of the Department of Cancer Biology on Mayo Clinic’s Florida campus.… read more

Anti-aging effects (in mice) of a dietary supplement called alpha lipoic acid

Alpha lipoic acid (ALA) can also stimulate telomerase, the enzyme that lengthens telomeres
August 25, 2015

Shortened telomeres, the protective caps at the ends of chromosomes, are both a sign of aging and contribute to it (credit: NIGMS)

Scientists at Emory University School of Medicine have found that the dietary supplement alpha lipoic acid (ALA) can stimulate telomerase, the enzyme that lengthens telomeres, with positive effects in a mouse model of atherosclerosis.

In human cells, shortened telomeres, the protective caps at the ends of chromosomes, are a sign of aging and also contribute to aging.

The discovery highlights… read more

‘Tricorder’-style handheld MouthLab detects patients’ vital signs, rivaling hospital devices

Could be used by people without special training at home or in the field
August 25, 2015

MouthLab ft

Inspired by the Star Trek tricorder, engineers and physicians at the Johns Hopkins University School of Medicine have developed a hand-held, battery-powered device called MouthLab that quickly picks up vital signs from a patient’s lips and fingertip.

Updated versions of the prototype could replace the bulky, restrictive monitors now used to display patients’ vital signs in hospitals and actually gather more data than is typically collected during… read more

Rechargeable batteries with almost infinite lifetimes coming, say MIT-Samsung engineers

Solid-state material could also make rechargeable batteries safer
August 24, 2015

Illustration of the crystal structure of a superionic conductor. The backbone of the material is a body-centred cubic-like arrangement of sulphur anions. Lithium atoms are depicted in green, sulfur atoms in yellow, PS4 tetrahedra in purple, and GeS4 tetrahedra in blue. Researchers have revealed the fundamental relationship between anion packing and ionic transport in fast lithium-conducting materials. (credit: Yan Wang)

MIT and Samsung researchers have developed a new approach to achieving long life and a 20 to 30 percent improvement in power density (the amount of power stored in a given space) in rechargeable batteries — using a solid electrolyte, rather than the liquid used in today’s most common rechargeables. The new materials could also greatly improve safety and last through “hundreds of thousands of cycles.”… read more

Why wind — and soon solar — are already cheaper than fossil fuels

August 24, 2015

Cost of energy from renewables expected to fall drastically over the next years (credit: Citigroup)

Citigroup has published an analysis of the costs of various energy sources called “Energy Darwinism II.” It concludes that if all the costs of generation are included (known as the levelized cost of energy), renewables turn out to be cheaper than fossil fuels and a “benefit rather than a cost to society,” RenewEconomy reports.

“Capital costs are often cited by the promoters of fossil fuels as… read more

Making hydrogen fuel from water and visible light at 100 times higher efficiency

A big step closer to hydrogen as a practical fuel to power vehicles and electrical devices
August 23, 2015

Test unit schematic for temperature-induced photocatalytic hydrogen production from H2O with methanol as a sacrificial agent: (1) thermocouple, (2) black Pt/TiO2 on SiO2 substrate, (3) quartz wool, (4) quartz tube reactor, and (5) electrical tube furnace (credit: Bing Han and Yun Hang Hu/Journal of Physical Chemistry)

Researchers at Michigan Technological University have found a way to convert light to hydrogen fuel more efficiently — a big step closer to mimicking photosynthesis.

Current methods for creating hydrogen fuel are based on using electrodes made from titanium dioxide (TiO2), which acts as a catalyst to stimulate the light–>water–>hydrogen chemical reaction. This works great with ultraviolet (UV) light, but UV comprises only… read more

Why you’re smarter than a chicken

August 21, 2015

(credit: Johnathan Nightingale via Flickr)

A single molecular event in a protein called PTBP1 in our cells could hold the key to how we evolved to become the smartest animal on the planet, University of Toronto researchers have discovered.

The conundrum: Humans and frogs, for example, have been evolving separately for 350 million years and use a remarkably similar repertoire of genes to build organs in the body. So what… read more

MIT researchers invent process for 3D-printing complex transparent glass forms

August 21, 2015

Printing molten glass (credit: John Klein et al./3D Printing and Additive Manufacturing)

An additive-manufacturing glass-printing process called G3DP (Glass 3D Printing) has been developed by researchers in the Mediated Matter Group at the MIT Media Lab in collaboration with the Glass Lab at MIT.

The platform is based on a dual heated-chamber concept. The upper chamber acts as a Kiln Cartridge (a thermally insulated heater) operating at about 1900°F to melt the glass, while the lower chamber serves… read more

The dilemma of human enhancement

August 20, 2015

Crosstalks

How far can science push the limits of human life?

That was the theme of a Crosstalks webcast today, “The dilemma of human enhancement,” available for download.

The show addressed questions like “Can we prevent people from dying? With implants, nanotechnology, artificial body parts and smart drugs we can enhance human physiology beyond our current limitations. But should we really pursue this? And can… read more

‘Diamonds from the sky’ approach to turn CO2 into valuable carbon nanofibers

Decreasing CO2 to pre-industrial-revolution levels is the goal
August 19, 2015

Researchers are generating carbon nanofibers (above) from CO2 , removing a greenhouse gas from the air to make products. (credit: Stuart Licht, Ph.D)

A research team of chemists at George Washington University has developed a technology that can economically convert atmospheric CO2 directly into highly valued carbon nanofibers for industrial and consumer products — converting an anthropogenic greenhouse gas from a climate change problem to a valuable commodity, they say.

The team presented their research today (Aug. 19) at the 250th National Meeting & Exposition of the American Chemical Societyread more

‘I think I know that person … or do I?’

Could help explain what goes wrong with memory in diseases like Alzheimer’s and could help to preserve people’s memories as they age
August 19, 2015

A cross-section of a rat's brain, showing where the key decisions are made about what is a new memory being made and what is old and familiar.A cross-section of a rat's brain, showing where the key decisions are made about what is a new memory being made and what is old and familiar. (credit: Johns Hopkins University)

Know that feeling when you see someone and realize you may know them (or not)? Now we know actually where in the brain that happens — the CA3 region of the hippocampus, the seat of memory, thanks to Johns Hopkins University neuroscientists.

“You see a familiar face and say to yourself, ‘I think I’ve seen that face.’ But is this someone I met five years ago, maybe… read more

Page 1 of 1,16312345678910last
close and return to Home