Geckos, found in places with warm climates, have fascinated people for hundreds of years. Scientists have been especially intrigued by these lizards, and have studied a variety of features such as the adhesive toe pads on the underside of gecko feet with which geckos attach to surfaces with remarkable strength.
New research from Rice Univ. and the Univ. of Texas MD Anderson Cancer Center shows how ovarian tumors co-opt a specific type of adult stem cell from abdominal tissues to fuel their growth. The research, published online in Cancer Research, suggests a new way to target aggressive ovarian cancers by disrupting the metabolic processes that allow them to thrive.
First developed in China in about the year A.D. 150, paper has many uses, the most common being for writing and printing upon. Indeed, the development and spread of civilization owes much to paper’s use as writing material. According to some surveys, 90% of all information in businesses today is retained on paper, even though the bulk of this printed paper is discarded after just one-time use.
The house mouse, stickleback fish and honey bee appear to have little in common, but at the genetic level these creatures respond in strikingly similar ways to danger, researchers report. When any of these animals confronts an intruder, the researchers found, many of the same genes and brain gene networks gear up or down in response.
A pair of researchers from the Univ. of California, Los Angeles Henry Samueli School of Engineering and Applied Science has created the first surface texture that can repel all liquids, no matter what material the surface is made of. Because its design relies only on the physical attributes of the texture, the texture could have industrial or biomedical applications.
In recent years it has been established that copper plays an essential role in the health of the human brain. Improper copper oxidation has been linked to several neurological disorders. Copper has also been identified as a critical ingredient in the enzymes that activate the brain’s neurotransmitters in response to stimuli. Now, a new study has shown that proper copper levels are also essential to the health of the brain at rest.
Researchers at KU Leuven’s Centre for Surface Chemistry and Catalysis have successfully converted sawdust into building blocks for gasoline. Using a new chemical process, they were able to convert the cellulose in sawdust into hydrocarbon chains. These hydrocarbons can be used as an additive in gasoline, or as a component in plastics.
The 1962 Nobel Prize James Watson won for his role in the discovery of the structure of DNA is going on the auction block. The auctioneer says the gold medal could bring $2.5 to $3.5 million on Dec. 4. Christie's says it's the first Nobel medal to be offered at auction by a living recipient. Watson made the 1953 discovery with Francis Crick and Maurice Wilkins.
While the turkey you eat on Thursday will bring your stomach happiness and could probably kick-start an afternoon nap, it may also save your life one day. That’s because the biological machinery needed to produce a potentially life-saving antibiotic is found in turkeys. Looks like there is one more reason to be grateful this Thanksgiving.
The body responds to tuberculosis infection by locking the bacterial offenders into tiny clusters of immune cells called granulomas, which are a hallmark of the disease. This containment strategy succeeds at first, but eventually the bacteria manage to break out of these intercellular jails and spread throughout the body.
If you spot someone stuck to the sheer glass side of a building on the Stanford Univ. campus, it's probably Elliot Hawkes testing his dissertation work. Hawkes, a mechanical engineering graduate student, works with a team of engineers who are developing controllable, reusable adhesive materials that, like the gecko toes that inspire the work, can form a strong bond with smooth surfaces but also release with minimal effort.
Scientists have discovered that genes switch off as memories are being formed, allowing for new connections between nerve cells. The discovery could eventually lead to a key for treating conditions such as autism and dementia. Researchers studying honeybees during learning activities have shown that memory management in the bee brain is controlled by small genetic elements called microRNAs that help regulate gene expression.
A widely presumed problem of aging is that the brain becomes less flexible or plastic, and that learning may therefore become more difficult. A new study led by Brown Univ. researchers contradicts that notion with a finding that plasticity did occur in seniors who learned a task well, but it occurred in a different part of the brain than in younger people.
As the installation of photovoltaic solar cells continues to accelerate, scientists are looking for inexpensive materials beyond the traditional silicon that can efficiently convert sunlight into electricity. Theoretically, iron pyrite could do the job, but when it works at all, the conversion efficiency remains frustratingly low. Now, a Univ. of Wisconsin-Madison research team explains why that is.
Ample evidence of ancient rivers, streams and lakes make it clear that Mars was at some point warm enough for liquid water to flow on its surface. While that may conjure up images of a tropical Martian paradise, new research published in Nature Geoscience throws a bit of cold water on that notion.
Here’s another reason to pay close attention to microbes: Current climate models probably overestimate the amount of carbon that will be released from soil into the atmosphere as global temperatures rise, according to research from Lawrence Berkeley National Laboratory. The findings are from a new computer model that explores the feedbacks between soil carbon and climate change.
Researchers at the Univ. of Georgia have discovered that a chemical compound commonly found in coffee may help prevent some of the damaging effects of obesity. In a recently published paper published, scientists found that chlorogenic acid, or CGA, significantly reduced insulin resistance and accumulation of fat in the livers of mice who were fed a high-fat diet.
Researchers from the Queen Mary Univ. of London gave a computer program the outline of how a magic jigsaw puzzle and a mind-reading card trick work, as well the results of experiments into how humans understand magic tricks, and the system created completely new variants on those tricks which can be delivered by a magician.
From a mechanical perspective, granular materials are stuck between a rock and a fluid place, with behavior resembling neither a solid nor a liquid. Think of sand through an hourglass: As grains funnel through, they appear to flow like water, but once deposited, they form a relatively stable mound, much like a solid.
The continental margins of plates on either side of the Atlantic Ocean are thinner than expected, and an international team led by a Rice Univ. scientist is using an array of advanced tools to understand why. The viscous bottom layers of the continental shelves beneath the Gibraltar arc and northeastern South America are literally being pulled off by adjacent subducting oceanic plates.
A trawl through a library of more than 50,000 small molecules has identified a potential candidate to inhibit the spread of cancer cells throughout the body. Reported in Nature Communications, the molecule targets a mechanism of tumor development that had previously been considered “undruggable” and could open the door to further promising new candidates.
It’s not uncommon to see cameras mounted on store ceilings, propped up in public places or placed inside subways, buses and even on the dashboards of cars. Cameras record our world down to the second. This can be a powerful surveillance tool on the roads and in buildings, but it’s surprisingly hard to sift through vast amounts of visual data to find pertinent information, until now.
The “surfactant” chemicals found in samples of fracking fluid collected in five states were no more toxic than substances commonly found in homes, according to a first-of-its-kind analysis by researchers at the Univ. of Colorado Boulder. Fracking fluid is largely comprised of water and sand, but oil and gas companies also add a variety of other chemicals, including surfactants.
An electronic “tongue” could one day sample food and drinks as a quality check before they hit store shelves. Or it could someday monitor water for pollutants or test blood for signs of disease. With an eye toward these applications, scientists are reporting the development of a new, inexpensive and highly sensitive version of such a device in ACS Applied Materials & Interfaces.
Does synthetic biology hold the key to manned space exploration of the moon and Mars? Berkeley Lab researchers have used synthetic biology to produce an inexpensive and reliable microbial-based alternative to the world’s most effective anti-malaria drug, and to develop clean, green and sustainable alternatives to gasoline, diesel and jet fuels. In the future, synthetic biology could also be used to make manned space missions more practical.