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Strains on Nature Are Growing, Report Says

March 30, 2005

Humans are damaging the planet at a rapid rate and raising risks of abrupt collapses in nature that could spur disease, deforestation or “dead zones” in the seas, the international Millennium Ecosystem Assessment report says.

Strange food for thought

June 17, 2004

The brain-gain revolution is already under way. But will these “neural enhancement” drugs turn us into Einsteins or Frankensteins?

Streaming CES: How We Did It

January 10, 2011

TechCrunch TV has revealed how it managed to provide more than 20 hours of live CES video coverage, using backpack systems instead of a satellite truck with or special expensive (and fixed-location) video fiber circuit.

“We used a LiveU mobile package provided by our live streaming partner, Ustream. The livepack fits in a custom designed backpack. It takes a firewire input containing video and audio from a… read more

Streaming video could strain Internet’s capacity

December 3, 2010

A report by Internet network management firm Sandvine estimates that as much as 43 percent of peak Internet traffic is eaten up by real time entertainment, mostly streaming video. As that grows rapidly, it imperils the ability to pipe entertainment to neighborhoods.

Netflix traffic alone makes up more than 17 percent of the data on the Web.

Street-fighting robot challenge announced

January 26, 2007

Nanoscale “drum skins” have been created using one-atom-thick sheets of graphene. The layers of the material vibrate when electrified, an effect that could ultimately be used to make sensors capable of weighing single atoms, one at a time.

Strength is but skin deep at the nanoscale

March 4, 2008

University of Pennsylvania engineers studying models of nanoscale wires have found that while metals tend to be stronger at nanoscale volumes, their strengths saturate at around 10-50 nanometers diameter, at which point they also become more sensitive to temperature and strain rate.

Nanoscale materials with relatively large surface areas are now routinely employed in microchips and nanoscience and technology, and their mechanical properties can differ greatly from their macroscale… read more

Strengthening fragile forests of carbon nanotubes

October 31, 2012

A carbon-nanotube forest (credit: BYU)


Brigham Young University (BYU) researchers have created stronger microstructures that can form precise, tall and narrow 3-D shapes for microelectromechanical systems (MEMS).

MEMS are ultra-tiny devices, often built on the scale of microns (millionths of a meter). Conventional MEMS structures tend to be made out of silicon-based materials familiar to the micro-electronics industry, but this ignores a suite of useful materials such… read more

Stress can be fattening, study finds

July 2, 2007

Studies of mice and monkeys show that repeated stress — and a high-fat, high-sugar diet — release a hormone, neuropeptide Y, that causes a buildup of abdominal fat, researchers from Georgetown University reported Sunday.

Manipulating levels of that hormone could melt fat from areas where it is not desired and accumulate it where it is needed, the researchers say in the journal Nature Medicine.

Stress hormone impacts memory, learning in diabetic rodents

February 18, 2008

A National Institutes of Health study finds increased levels of the stress hormone cortisol temporarily disrupts healthy hippocampus functions in diabetic rats, a step in understanding why diabetes impairs the cognitive health of people.

Both Type 1 and Type 2 diabetic rats exhibited learning and memory deficits when cortisol levels were elevated due to impaired plasticity and declines in new cell growth.

NIH/National Institute on Agingread more

‘Stress’ protein could halt aging process, say scientists

May 25, 2010

Excessive amounts of HSP10 (Heat Shock Protein) inside mitochondria (energy generators in cells) can halt the body’s aging process by preserving muscle strength, University of Liverpool and the University of California have found.

Stress turns ordinary cells pluripotent [RESEARCHER MISCONDUCT FOUND]

Implications for regenerative medicine, aging, cancer
January 30, 2014


UPDATE: April 4, 2014 — A committee organized by the RIKEN Center for Developmental Biology has concluded that RIKEN’s Haruko Obokata, Ph.D., the lead researcher of this study, is guilty of scientific misconduct, according to a news article in Genetic Engineering & Biotechnology News


Breakthrough findings by Haruko Obokata and colleagues at the RIKEN Center for Developmental Biology (CDB) look to upset the fundamental… read more

Stress-generated cortisol found to cause premature aging of immune system

July 16, 2008
Immune cells (stained blue) end in protective caps called telomeres (stained yellow) that are shorter in the elderly -- and in persons suffering chronic stress. A new UCLA study suggests cortisol is the culprit behind premature aging of the immune system in stressed-out people. (UCLA/Effros lab)

A new UCLA study suggests cortisol is the culprit behind premature aging of the immune system in stressed-out people.

UCLA scientists found that the stress hormone cortisol suppresses immune cells’ ability to activate their telomerase, an enzyme within the cell that keeps immune cells young by preserving their telomere length and ability to continue dividing. This may explain why the cells of persons under chronic stress have… read more

Stressed Mice Quicker To Get Skin Cancer

December 15, 2004

Johns Hopkins Kimmel Cancer Center scientists have found that stress can speed up the onset of skin cancer in mice.

Their study shows that mice exposed to stressful conditions and cancer-causing UV light developed skin cancers in less than half the time it took for non-stressed mice to grow tumors.

The investigators say that if what they are seeing in mice has relevance in man, stress-reducing programs like… read more

Stressed-DNA repair protein identified

June 17, 2011

Vera Gorbunova and Andrei Seluanov of the University of Rochester have found that human cells undergoing oxidative stress caused by environmental chemicals or routine cellular processes produce a protein (SIRT6) that stimulates cells to repair DNA double-strand breaks, thought to be associated with premature aging and cancer.

The team first measured levels of SIRT6 in stressed cells, then treated a second… read more

Stretchable Displays

May 11, 2009

Researchers at the University of Tokyo have developed a stretchable display by connecting organic light-emitting diodes (OLEDs) and organic transistors with a new rubbery conductor.

The display can be folded in half or crumpled up without incurring any damage, and can also cover complex three-dimensional objects, unlike other stretchable displays.

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