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New analytical technology reveals nanomechanical surface traits

August 27, 2014 | by Emil Venere, Purdue Univ. | Comments

Researchers have discussed the merits of surface-stress influence on mechanical properties for decades. Now, a new research platform, called nanomechanical Raman spectroscopy and developed at Purdue Univ., uses a laser to measure the "nanomechanical" properties of tiny structures undergoing stress and heating.

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Evolution used similar molecular toolkits to shape flies, worms, humans

August 28, 2014 1:35 pm | by Bill Hathaway, Yale Univ. | Comments

Although separated by hundreds of millions of years of evolution, flies, worms and humans share ancient patterns of gene expression, according to a massive Yale Univ.-led analysis of genomic data. Two related studies led by scientists at Harvard and Stanford,tell a similar story: Even though humans, worms and flies bear little obvious similarity to each other, evolution used remarkably similar molecular toolkits to shape them.

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Sensory-tested drug delivery vehicle could limit spread of HIV, AIDS

August 28, 2014 12:33 pm | by Jeff Mulhollem, Penn State Univ. | Comments

A unique method for delivering compounds that could positively impact the global battle against HIV and AIDS may be possible, thanks to researchers in Penn State's College of Agricultural Sciences. A semi-soft vaginal suppository made from the seaweed-derived food ingredient carrageenan and loaded with the antiviral drug Tenofovir provides a woman-initiated, drug delivery vehicle that can protect against the spread of STIs.

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From nose to knee: Engineered cartilage regenerates joints

August 28, 2014 11:59 am | Comments

Cartilage lesions in joints often appear in older people as a result of degenerative processes, and appear in younger people after injuries and accidents. Such defects are difficult to repair and often require complicated surgery and long rehabilitation times. Researchers in Switzerland have reported that cells taken from the nasal septum are able to adapt to the environment of the knee joint and can thus repair articular cartilage defects.

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Synthesis produces new antibiotic

August 28, 2014 10:10 am | by Mike Williams, Rice Univ. | Comments

A fortuitous collaboration at Rice Univ. has led to the total synthesis of a recently discovered natural antibiotic. The laboratory recreation of a fungus-derived antibiotic, viridicatumtoxin B, may someday help bolster the fight against bacteria that evolve resistance to treatments in hospitals and clinics around the world.

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U.S. to begin safety testing Ebola vaccine next week

August 28, 2014 9:25 am | by Seth Borenstein - AP Science Writer - Associated Press | Comments

Federal researchers next week will start testing humans with an experimental vaccine to prevent the deadly Ebola virus. The National Institutes of Health announced Thursday that it is launching the safety trial on a vaccine developed by the agency's National Institute of Allergy and Infectious Diseases and GlaxoSmithKline.

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Astronomers see the birth of a massive galaxy, hidden by dust

August 28, 2014 9:17 am | by Jim Shelton, Yale Univ. | Comments

Yale Univ. astronomers have discovered a window into the early, violent formation of the cores of the universe’s monster galaxies, obscured behind walls of dust. After years of searching, scientists have observed one such turbulent, starbursting galactic core in the young universe using the NASA/ESA Hubble Space Telescope and a telescope from the W.M. Keck Observatory in Hawaii.

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New DARPA program aimed at developing customized therapies

August 28, 2014 9:11 am | Comments

DARPA’s new Electrical Prescriptions (ElectRx) program was among the initiatives the White House highlighted this week as President Barack Obama addressed the need for new and more effective strategies for improving the health of service members, veterans and others. ElectRx goes beyond medication, aiming to explore neuromodulation of organ functions to help the human body heal itself.

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Encyclopedia of how genomes function gets much bigger

August 28, 2014 9:07 am | Comments

A big step in understanding the human genome has been unveiled in the form of three analyses that provide the most detailed comparison yet of how the genomes of the fruit fly, roundworm, and human function. The research compares how the information encoded in the three species’ genomes is “read out,” and how their DNA and proteins are organized into chromosomes. The results add billions of entries to the archive of functional genomic data.

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Scientists learn to control reactions with rare-earth catalyst

August 28, 2014 9:06 am | by Dawn Levy, Oak Ridge National Laboratory | Comments

Scientists at Oak Ridge National Laboratory have discovered they can control chemical reactions in a new way by creating different shapes of cerium oxide, a rare-earth-based catalyst. Their finding holds potential for refining fuels, decreasing vehicle emissions, producing commodity chemicals and advancing fuel cells and chemical sensors.

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Nanodiamonds are forever

August 28, 2014 9:03 am | by Julie Cohen, UC Santa Barbara | Comments

An international group of scientists posit that a comet collision with Earth played a major role in the extinction of most of North America’s megafauna close to 13,000 years ago. In a new study, they have focused on the character and distribution of nanodiamonds, which are produced during such an extraterrestrial collision. The researchers found an abundance of these tiny diamonds distributed over 50 million km2 in the Northern Hemisphere.

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Cool roofs in China can save energy, reduce emissions

August 28, 2014 8:49 am | by Julie Chao, Lawrence Berkeley National Laboratory | Comments

Working with Chinese researchers, Lawrence Berkeley National Laboratory has conducted the first comprehensive study of cool roofs in China and concluded that they would be effective in substantially reducing energy use and greenhouse gas emissions in climate zones with hot summers.

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Leading scientists call for a stop to non-essential use of fluorochemicals

August 28, 2014 8:27 am | Comments

A number of leading international researchers, among others from the National Food Institute, Technical University of Denmark, have recommended that fluorochemicals should only be used where absolutely essential, until better methods exist to measure the chemicals and more is known about their potentially harmful effects.

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Neuroscientists reverse memories’ emotional associations

August 28, 2014 8:27 am | by Anne Trafton, MIT News Office | Comments

Most memories have some kind of emotion associated with them. A new study from Massachusetts Institute of Technology neuroscientists reveals the brain circuit that controls how memories become linked with positive or negative emotions. Furthermore, the researchers found that they could reverse the emotional association of specific memories by manipulating brain cells with optogenetics.

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Experiments explain why some liquids are fragile and others are strong

August 27, 2014 4:37 pm | by Diana Lutz, Washington Univ. in St. Louis | Comments

Only recently has it become possible to accurately “see” the structure of a liquid. Using x-rays and a high-tech apparatus that holds liquids without a container, a professor at Washington Univ. in St. Louis was able to compare the behavior of glass-forming liquids as they approach the glass transition.

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Rubber meets the road with ORNL carbon, battery technologies

August 27, 2014 3:22 pm | by Ron Walli, Oak Ridge National Laboratory Communications | Comments

Recycled tires could see new life in lithium-ion batteries that provide power to plug-in electric vehicles and store energy produced by wind and solar, say researchers at Oak Ridge National Laboratory. By modifying the microstructural characteristics of carbon black, a substance recovered from discarded tires, a team of researchers is developing a better anode for lithium-ion batteries.

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