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Self-powered nanoparticles instantly deliver healing drugs to bones

Bioelectric field pulls the negatively charged nanoparticles toward the bone crack
September 3, 2013

Sen_BoneHealing

A novel method for finding and delivering healing drugs to newly formed microcracks in bones has been invented by a team of chemists and bioengineers at Penn State University and Boston University.

The method involves the targeted delivery of the drugs, directly to the cracks, on the backs of tiny self-powered nanoparticles. The energy that revs the motors of the nanoparticles and sends them rushing… read more

Self-Powered Nanotechnology Closer to Reality

April 8, 2010

Piezoelectric nanoscale sensors that are self-powered by biomechanical motion (such as body movements) can now produce 2.4 volts, Georgia Tech scientist Zhong Lin Wang reports.

They could be useful for detecting molecular signs of disease in the blood, minute amounts of poisonous gases in the air, and trace contaminants in food — batteries not required.

Self-Powered Silicon Laser Chips

July 6, 2006

A new method of turning waste heat into electrical power could speed up communications inside computers — and mark another advance in the field of silicon photonics.

Self-Programming Hybrid Memristor/Transistor Circuit Could Continue Moore’s Law

February 27, 2009

Rsearchers from Hewlett-Packard Laboratories have fabricated and demonstrated a hybrid circuit with a memory resistor (or “memristor”) combined with a transistor circuit for the first time. The circuit can also alter its own programming.

A circuit containing both memristors and transistors could provide enhanced functionality with fewer components, minimizing chip area and power consumption.

Self-Propelling Bacteria Harnessed to Turn Gears

October 19, 2009

University of Rome researchers have attached self-propelling bacteria to a nanoscale cog, causing it to spin.

Applications could include self-propelling micro-machines, micropumps, mixers for microfluidics, and scaled up macrmachines.

Self-repairing aircraft could revolutionize aviation safety

May 20, 2008

A new technique, developed by Bristol University aerospace engineers, that mimics healing processes found in nature could enable damaged aircraft to mend themselves automatically, even during a flight.

If a tiny hole/crack appears in the aircraft (e.g. due to wear and tear, fatigue, a stone striking the plane etc), epoxy resin would “bleed” from embedded vessels near the hole/crack and quickly seal it up, restoring structural integrity. By mixing… read more

Self-Repairing Computers

May 22, 2003

Crashes happen. Researchers at Stanford University and the University of California at Berkeley are designing systems that recover rapidly when they do — the recovery-oriented computing (ROC) approach.

ROC design principles are based on speedy recovery, better tools to pinpoint fault sources, an “undo” function, test errors to permit evaluation of system behavior and assist in operator training, and selective rebooting to minimize loss of data.

“If the… read more

Self-repairing mechanism helps to preserve brain function in neurodegenerative diseases

June 20, 2014

Prion-infected tissue (credit: Dr. Al Jenny - Public Health Image Library)

Neurogenesis, the self-repairing mechanism of the adult brain by creating new neurons, can help to preserve brain function in neurodegenerative diseases such as Alzheimer’s, Prion, and Parkinson’s, new research led by scientists at the University of Southampton has found.

The progressive degeneration and death of the brain, occurring in many neurodegenerative diseases, is often seen as an unstoppable and irrevocable process.

But now, a research team,… read more

Self-replication of information-bearing nanoscale patterns

October 13, 2011

DNA tile sequences and structures (side and cross-section views) (credit: Tong Wang et al./Nature)

New York University researchers have created webs of DNA, which made copies of themselves. This is a step towards self-replication in materials fabrication.

They designed tile motifs so they formed a seven-tile seed sequence. They then used the seeds to instruct the formation of a first generation of complementary seven-tile daughter sequences. And finally, they used the daughters to instruct the formation of seven-tile granddaughter sequences identical to the… read more

Self-soldering nanotubes could replace silicon transistors for flexible electronics

November 27, 2013

Depiction of junction heating caused by current flow across resistive nanotube-nanotube junctions.’

University of Illinois researchers have developed a way to solder (connect) carbon nanotubes, which are too small for even the world’s tiniest soldering iron.

Researchers have been exploring using carbon nanotubes as transistors instead of traditional silicon, because they are easier to transport onto alternate substrates, such as thin sheets of plastic, for low-cost flexible electronics or flat-panel displays.

Carbon nanotubes are high-quality conductors, but creating single tubes… read more

Self-strengthening nanocomposite gets stronger from repeated stress

March 25, 2011

(Photo credit: Ajayan Lab/Rice University)

Researchers at Rice University have created a synthetic material that gets stronger from repeated stress, much like the body strengthens bones and muscles after repeated workouts, says Pulickel Ajayan, professor of mechanical engineering, materials science, and chemistry.

The researchers tested the high-cycle fatigue properties of a polymer-based nanocomposite with carbon nanotube fillers by infiltrating a forest of vertically aligned, multiwalled nanotubes with polydimethylsiloxane (PDMS), an… read more

Self-wiring supercomputer is cool and compact

June 1, 2005

An experimental supercomputer made from hardware that can reconfigure itself to tackle different software problems is being built by Edinburgh University researchers.

It will use Field Programmable Gate Array (FPGA) chips instead of conventional fixed, general-purpose processing devices.

The researchers say it could usher in a new generation of compact supercomputers over the coming decade that will be up to 100 times more energy efficient than a conventional… read more

Selfish genes may drive out diseases

March 30, 2007

Researchers have come up with a new way to establish desirable genes in insect populations. They created a synthetic selfish genetic element that propagates rapidly through Drosophila populations — an approach they say could also help drive malaria-resistance genes into mosquito populations.

Selling Stem Cells

April 10, 2008

BioTime, a California biotech company headed by Michael West, a prominent scientist and entrepreneur involved in stem cell research, plans to supply scientists working with stem cells the tool they most need to develop and test novel therapies–a reliable and reproducible source of the cells.

They plan to sell human embryonic progenitors, cells that have inched partway along the continuum from embryonic stem cell to differentiated adult cell and… read more

Semantic memory pinpointed in the brain

September 8, 2006

The part of the brain responsible for the way we understand words, meanings and concepts has been revealed as the anterior temporal lobe.

The findings may one day help researchers treat dementia by targeting gene therapy or administering drugs directly into the brain region responsible for specific types of memory loss.

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