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Slim chance of tuning in to alien TV

August 6, 2007

Marko Horvat, a computer scientist at the University of Zagreb, calculated the odds of detecting alien civilizations of different lifespans from their radio signals. If, for example, 10 civilizations, each with a lifespan of 250,000 years, live within radio reach of Earth, the probability that one of them will be detected is about 9 per cent, assuming near-perfect radio telescopes scanning the sky constantly (not realistic).

If there are… read more

Slim, warm superconductors promise faster electronics n

October 30, 2009

A superconductor made from a layer of copper oxide material less than a nanometer thick, developed by Brookhaven National Labs, suggests a new possible route to faster electronic components.

Slimmer Nanorods Good Fit for Next-Gen 3-D Computer Chips

March 18, 2009

Researchers at Rensselaer Polytechnic Institute have developed a new technique for growing slimmer copper nanorods, a key step for advancing integrated 3-D chip technology.

Slimmer nanorods, by virtue of their smaller diameters, require less heat to anneal. These lower temperatures won’t damage or degrade the delicate semiconductors, leading to a less expensive, more reliable device.

‘Slow’ light to speed up the net

August 14, 2008

A huge increase in the speed of the Internet could be produced by using metamaterials to replace the bulky and slow electronics that do the routing of information carried on fiber cables, say researchers at University of California, Berkeley and the University of Oxford.

Metamaterials could be used to temporarily store light signals, with different delays for different light frequencies, achieving an “all-optical network.”

Slow-Healing Bones May Get Boost From Drug

April 15, 2009

Teriparatide (Forteo), a drug that boosts the body’s production of stem cells appears to “jump-start” the bone-healing process to a point that older adults’ bones heal as fast as young people’s, research at University of Rochester Medical Center suggests.

Slower white-matter development found in infants with autism

February 17, 2012

autism

The changes in brain development that underlie autism spectrum disorder (ASD) may be detectable in children as young as 6 months, according to University of North Carolina researchers.

While core behaviors associated with ASD (impaired social communication and repetitive behaviors) tend to be identified after a baby’s first birthday, researchers found clear differences in brain communication pathways as early as 6 months in infants who later received a… read more

Slowing down the aging process by ‘remote control’

September 10, 2014

Activating a gene called AMPK in the nervous system induces the anti-aging cellular recycling process of autophagy in both the brain and intestine. Activating AMPK in the intestine leads to increased autophagy in both the intestine and brain. Matthew Ulgherait, David Walker and UCLA colleagues showed that this 'inter-organ' communication during aging can substantially prolong the healthy lifespan of fruit flies. (Credit: Matthew Ulgherait/UCLA)

UCLA biologists have identified a gene that can slow the aging process throughout the entire body when activated remotely in key organ systems.

Working with fruit flies, the life scientists activated a gene called AMPK that is a key energy sensor in cells; it gets activated when cellular energy levels are low.

Increasing the amount of AMPK in fruit flies’ intestines increased their lifespans by about 30 percent… read more

Slowing the aging process using only antibiotics

May 27, 2013

Lightmatter_lab_mice

Why is it that within a homogeneous population of the same species, some individuals live three times as long as others?

EPFL researchers investigated this question and found the mechanism responsible for aging hidden deep within mitochondria.

The were able to dramatically slow aging down in worms by administering antibiotics to the young, achieving a lifespan extension of 60 percent.

Mitochondia: biological timekeepersread more

Slowly, Cancer Genes Tender Their Secrets

December 26, 2005

Scientists are now finding that untangling the genetics of cancer is not impossible and are basing new treatments on their findings.

The turning point came only recently: with microarrays, or gene chips that can be coated with all known human genes, scientists can now discover every gene that is active in a cancer cell and learn what portions of the genes are amplified or deleted.

With another method,… read more

Small epigenetic DNA modifications predict brain’s threat response

Stress may be passed down through generations, studies suggest
August 8, 2014

Threat-related amygdala reactivity associated with serotonin transporter epigenetic modification (credit: Yuliya S Nikolova/Nature Neuroscience)

The tiny addition of a chemical mark called called a methyl group atop a gene that is well known for its involvement in clinical depression and posttraumatic stress disorder can affect the way a person’s brain responds to threats, according to a new study by Duke University researchers.

The study results, published August 3 in Nature Neuroscience, go beyond genetics to help explain why some… read more

Small Matters

July 19, 2005

Nanotechnology could lead to the next arms race. Experts are debating how to prepare.

Small Molecule, Big Threat

November 27, 2006

MicroRNAs (miRNAs) play important roles in health and disease, and tiny amounts can cause heart failure.

Genetically erasing the miRNA that prompted heart failure could prevent it, scientists speculate.

Small RNAs Make Big Splash

December 19, 2002

Recent discoveries indicate that a class of RNA molecules called small RNAs operate many of the cell’s controls. They can shut down genes or alter their levels of expression.

In some species, truncated RNA molecules literally shape genomes, carving out chunks to keep and discarding others. There are even hints that certain small RNAs might help chart a cell’s destiny by directing genes to turn on or off during… read more

Small science to be big in 2005: analysts

January 21, 2005

“Nanotechnology” will be a much more familiar word to everyone in 2005, not just scientists, say analysts.

In 2005, people will start noticing its mundane uses, like making car paint shinier, windows that clean themselves, and smaller and better mobile batteries.

Small Thoughts for a Global Grid

September 2, 2003

Dr. Richard E. Smalley, discoverer of nanoscale buckyballs, has become increasingly hopeful about the potential of new technologies based on hydrogen and renewable energy sources like wind and solar power.

He believes carbon nanotubes could be woven into long wires that would be more efficient conductors than copper yet far lighter, making it much cheaper to move solar and wind power to places it is needed.

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