The Race for EVs
|Bernie DeGroat||June 12th 2013|
Making cars more fuel-efficient is great for reducing greenhouse gas emissions, but rather than promoting sales of electric and other alternative-fuel vehicles, policymakers should turn their focus to cutting emissions in other energy sectors—from oil wells and power plants to farms and forests affected by biofuels production—says a University of Michigan researcher.
"While the rush to get alternative fuels on the road has become dogma in many policy circles, such haste cannot be justified by careful analysis," said John DeCicco, a research professor at the U-M Energy Institute and professor of practice at the School of Natural Resources and Environment.
Alternative fuel vehicles have been promoted for decades—plug-in electric cars as well as those powered by ethanol, natural gas, hydrogen or other nonpetroleum fuels. Federal tax credits for electric vehicles range up to $7,500 per car and many other alternative fuels are also subsidized. Read more ..
The Healthy Edge
Activating an enzyme known to play a role in the anti-aging benefits of calorie restriction delays the loss of brain cells and preserves cognitive function in mice, according to a study published in the May 22 issue of The Journal of Neuroscience. The findings could one day guide researchers to discover drug alternatives that slow the progress of age-associated impairments in the brain.
According to a release from the Massachusetts Institute of Technology, previous studies have shown that reducing calorie consumption extends the lifespan of a variety of species and decreases the brain changes that often accompany aging and neurodegenerative diseases such as Alzheimer’s. There is also evidence that caloric restriction activates an enzyme called Sirtuin 1 (SIRT1), which studies suggest offers some protection against age-associated impairments in the brain.
In the current study, Li-Huei Tsai — director of the Picower Institute for Learning and Memory and Picower Professor of Neuroscience at MIT — along with postdoc Johannes Gräff and others at MIT tested whether reducing caloric intake would delay the onset of nerve cell loss that is common in neurodegenerative disease, and if so, whether SIRT1 activation was driving this effect. The group not only confirmed that caloric restriction delays nerve cell loss, but also found that a drug that activates SIRT1 produces the same effects.
“There has been great interest in finding compounds that mimic the benefits of caloric restriction that could be used to delay the onset of age-associated problems and/or diseases,” says Dr. Luigi Puglielli, who studies aging at the University of Wisconsin, Madison, and was not involved in this study. “If proven safe for humans, this study suggests such a drug could be used as a preventive tool to delay the onset of neurodegeneration associated with several diseases that affect the aging brain." Read more ..
The Edge of Space
|Daniel Stolte||June 8th 2013|
University of Arizona
As part of an international team of exoplanets hunters, astronomers at the University of Arizona are developing a technique to detect faint dust clouds around other stars, many of which might hide Earth-like planets.
If one looks only for the shiniest pennies in the fountain, chances are one misses most of the coins because they shimmer less brightly. This, in a nutshell, is the conundrum astronomers face when searching for Earth-like planets outside our solar system.
Astronomers at the University of Arizona are part of an international team of exoplanets hunters developing new technology that would dramatically improve the odds of discovering planets with conditions suitable for life – such as having liquid water on the surface. The team presented its results at a scientific conference sponsored by the International Astronomical Union in Victoria, British Columbia. Read more ..
The Edge of Geology
|Alda Olafsson||June 7th 2013|
Spanish National Research Council
Every 6.6 years, the comet Giacobini-Zinner circulates through the inner solar system and passes through the perihelion, the closest point to the Sun of its orbit. Then, the comet sublimates the ices and ejects a large number of particles that are distributed in filaments. The oldest of these particles have formed a swarm that the Earth passes trough every year in early October. The result is a Draconid meteor shower –meteors from this comet come from the northern constellation Draco–, which hits the Earth's atmosphere at about 75,000 km/h, a relatively slow speed in comparison with other meteoric swarms.
Josep Maria Trigo, researcher from the CSIC Institute of Space Sciences (ICE), states: "When a comet approaches the Sun, it sublimates part of its superficial ice and the gas pressure drives a huge number of particles that adopt orbits around the Sun, forming authentic swarms. The study shows that in the evening from October 8th to 9th 2011, the Earth intercepted three dense spindles of particles left behind by the comet when it crossed through the perihelion". Read more ..
The Edge of Evolution
|Jim Erickson||June 6th 2013|
Efforts to restore sturgeon in the Great Lakes region have received a lot of attention in recent years, and many of the news stories note that the prehistoric-looking fish are "living fossils" virtually unchanged for millions of years.
But a new study by University of Michigan researchers and their colleagues reveals that in at least one measure of evolutionary change—changes in body size over time—sturgeon have been one of the fastest-evolving fish on the planet.
"Sturgeon are thought of as a living fossil group that has undergone relatively slow rates of anatomical change over time. But that's simply not true," said Daniel Rabosky, assistant professor in the U-M Department of Ecology and Evolutionary Biology and a curator of herpetology at the Museum of Zoology. Read more ..
The Edge of Medicine
|Laura J. Williams||June 6th 2013|
University of Michigan researchers have determined how a gene that is known to be defective in Down syndrome is regulated and how its dysregulation may lead to neurological defects, providing insights into potential therapeutic approaches to an aspect of the syndrome.
Normally, nerve cells called neurons undergo an intense period of extending and branching of neuronal protrusions around the time of birth. During this period, the neurons produce the proteins of the gene called Down syndrome cell-adhesion molecule, or Dscam, at high levels. After this phase, the growth and the levels of protein taper off.
However, in the brains of patients with Down syndrome, epilepsy and several other neurological disorders, the amount of Dscam remains high. The impact of the elevated Dscam amount on how neurons develop is unknown.
Bing Ye, a faculty member at U-M's Life Sciences Institute, found that in the fruit fly Drosophila, the amount of Dscam proteins in a neuron determines the size to which a neuron extends its protrusions before it forms connections with other nerve cells. An overproduction of Dscam proteins leads to abnormally large neuronal protrusions.
Ye also identified two molecular pathways that converge to regulate the abundance of Dscam. One, dual leucine zipper kinase (DLK), which is involved in nerve regeneration, promotes the synthesis of Dscam proteins. Another, fragile X mental retardation protein (FMRP), which causes fragile X syndrome when defective, represses Dscam protein synthesis. Because humans share these genes with Drosophila, the DLK-FMRP-Dscam relationship presents a possible target for therapeutic intervention, Ye said. Read more ..
The Edge of Space
|Suzanne Presto||June 5th 2013|
The U.S. space agency NASA is preparing to launch a new mission to study the sun. The Interface Region Imaging Spectrograph, or IRIS, will observe the way solar material gathers energy and heats up as it moves through the sun's lower atmosphere.
The upper layer of the sun's atmosphere, known as the corona, is thousands of times hotter than the sun's surface.
Scientists want to figure out how that happens, so they are preparing a mission to study the sun's so-called interface region, the area between the sun's photosphere and its corona. Energy and plasma that flow through the interface region have an impact on us here on Earth. That region is the source of the sun's ultraviolet emission, which has an effect on our planet's climate, as well as the near-Earth space environment. Energy that seeps through the interface region drives solar wind. Read more ..
The Water's Edge
|Terrence Sterling||June 4th 2013|
Woods Hole Oceanographic Institution
Acidifying oceans could dramatically impact the world's squid species, according to a new study led by Woods Hole Oceanographic Institution (WHOI) researchers and soon to be published in the journal PLOS ONE. Because squid are both ecologically and commercially important, that impact may have far-reaching effects on the ocean environment and coastal economies, the researchers report.
"Squid are at the center of the ocean ecosystem—nearly all animals are eating or eaten by squid," says WHOI biologist T. Aran Mooney, a co-author of the study. "So if anything happens to these guys, it has repercussions down the food chain and up the food chain."
Research suggests that ocean acidification and its repercussions are the new norm. The world's oceans have been steadily acidifying for the past hundred and fifty years, fueled by rising levels of carbon dioxide (CO2) in the atmosphere. Seawater absorbs some of this CO2,turning it into carbonic acid and other chemical byproducts that lower the pH of the water and make it more acidic. As CO2 levels continue to rise, the ocean's acidity is projected to rise too, potentially affecting ocean-dwelling species in ways that researchers are still working to understand. Read more ..
The Healthy Edge
|Diego DiGhero||June 3rd 2013|
|Model of infant tranchea and bioresorbable splint|
Every day, their baby stopped breathing, his collapsed bronchus blocking the crucial flow of air to his lungs. April and Bryan Gionfriddo watched helplessly, just praying that somehow the dire predictions weren’t true. “Quite a few doctors said he had a good chance of not leaving the hospital alive,” says April Gionfriddo, about her now 20-month-old son, Kaiba. “At that point, we were desperate. Anything that would work, we would take it and run with it.” They found hope at the University of Michigan, where a new, bioresorbable device that could help Kaiba was under development. Kaiba’s doctors contacted Glenn Green, M.D., associate professor of pediatric otolaryngology at the University of Michigan.
Green and his colleague, Scott Hollister, Ph.D., professor of biomedical engineering and mechanical engineering and associate professor of surgery at U-M, went right into action, obtaining emergency clearance from the Food and Drug Administration to create and implant a tracheal splint for Kaiba made from a biopolymer called polycaprolactone. Read more ..
Edge of Space
|Jennifer Chu||June 2nd 2013|
Ever since the first satellites were sent to the moon to scout landing sites for Apollo astronauts, scientists have noticed a peculiar phenomenon: As these probes orbited the moon, passing over certain craters and impact basins, they periodically veered off course, plummeting toward the lunar surface before pulling back up.
As it turns out, the cause of such bumpy orbits was the moon itself: Over the years, scientists have observed that its gravity is stronger in some regions than others, creating a “lumpy” gravitational field. In particular, a handful of impact basins exhibit unexpectedly strong gravitational pull. Scientists have suspected that the explanation has to do with an excess distribution of mass below the lunar surface, and have dubbed these regions mass concentrations, or “mascons.”
Exactly how these mascons came to be has remained a mystery — until now.
Using high-resolution gravity data from NASA’s Gravity Recovery and Interior Laboratory (GRAIL) mission, researchers at MIT and Purdue University have mapped the structure of several lunar mascons and found that their gravitational fields resemble a bull’s-eye pattern: a center of strong, or positive, gravity surrounded by alternating rings of negative and positive gravity. Read more ..
Edge of Space
|Diego DiGhero||June 2nd 2013|
NASA’s Curiosity rover found evidence for an ancient, flowing stream on Mars at a few sites, including a rocky outcrop which the science team has named “Hottah.”
The discovery suggests that the stream bed examined by the rover provides evidence that water, possibly lots of it, once flowed on Mars.
In a new study, scientists say their findings represent the first on-site evidence of sustained water flow on the Martian landscape. The discovery also supports the theory Mars would have once been able to host life. Read more ..
The Edge of Medicine
|Catherine Meyers||June 2nd 2013|
American Institute of Physics
Using the sensitive ears of a parasitic fly for inspiration, a group of researchers has created a new type of microphone that achieves better acoustical performance than what is currently available in hearing aids.
Ronald Miles studies the hearing of Ormia ochracea, a house fly-sized insect that is native to the southeast United States and Central America. Unlike most other flies, Ormia ochracea has eardrums that sense sound pressure, as do our ears, and they can hear "quite well," says Miles. The female flies use their "remarkable" directional hearing to locate singing male crickets, on which they deposit their larvae.
Previously, Miles and colleagues Daniel Robert and Ronald Hoy described the mechanism by which the fly achieves its directional hearing, despite its small size. Now Miles and his group have designed a new microphone inspired by the fly's ears. Read more ..
The Edge of Medicine
Researchers have determined the precise chemical structure of the HIV capsid, a protein shell that protects the virus's genetic material and is a key to its ability to infect and debilitate the human body's defense mechanism. Detailed simulations were achieved with the use of a supercomputer on a 64 million atom sample. The capsid has become an attractive target for the development of new antiretroviral drugs that suppress the HIV virus and stop the progression of AIDS.
The research paper describing these results is the cover story of this week's journal Nature.
This discovery was enabled by a recently-dedicated, new supercomputer called Blue Waters, one of the world's most powerful computers. Read more ..
The Nanotechnology Edge
|Nicole Casal Moore||May 31st 2013|
Leading nanoscientists created beautiful, tiled patterns with flat nanocrystals, but they were left with a mystery: Why did some sets of crystals arrange themselves in an alternating, herringbone style? To find out, they turned to experts in computer simulation at the University of Michigan and the Massachusetts Institute of Technology.
The result gives nanotechnology researchers a new tool for controlling how objects one-millionth the size of a grain of sand arrange themselves into useful materials—and a means to discover the rest of the tool chest. A paper on the research is published online in Nature Chemistry.
"The excitement in this is not in the herringbone pattern, it's about the coupling of experiment and modeling, and how that approach lets us take on a very hard problem," said Christopher Murray, the Richard Perry University Professor and professor of chemistry at the University of Pennsylvania. Murray's group is renowned for making nanocrystals and arranging them into larger crystal superstructures. Read more ..
|Jessica Berman||May 30th 2013|
Researchers have developed a gene therapy against pandemic influenza in laboratory animals, one that stops infection at the point of entry - the nose. The therapy could potentially thwart the most aggressive viral pathogens, saving the lives of an estimated 500,000 people who die worldwide each year from the flu.
The genetic therapy developed by researchers at the University of Pennsylvania expresses so-called broadly neutralizing antibodies, giving lab mice and ferrets almost complete protection against a number of lethal avian influenza strains, including those isolated from the deadly 1918 and 2009 pandemics.
Unlike conventional vaccines which stimulate the body’s natural immune system to fight an infection, broadly neutralizing antibodies halt a virus’s biological activity so it cannot make people sick by infecting cells in the first place. The antibodies can become effective in two to three days. Read more ..
The Water's Edge
|Hannah Hickey||May 28th 2013|
University of Washington
The Amazon rain forest, popularly known as the lungs of the planet, inhales carbon dioxide as it exudes oxygen. Plants use carbon dioxide from the air to grow parts that eventually fall to the ground to decompose or get washed away by the region’s plentiful rainfall.
Until recently people believed much of the rain forest’s carbon floated down the Amazon River and ended up deep in the ocean. University of Washington research showed a decade ago that rivers exhale huge amounts of carbon dioxide – though left open the question of how that was possible, since bark and stems were thought to be too tough for river bacteria to digest.
A study published this week in Nature Geoscience resolves the conundrum, proving that woody plant matter is almost completely digested by bacteria living in the Amazon River, and that this tough stuff plays a major part in fueling the river’s breath. Read more ..
The Edge of Mars
|Katherine Gombay||May 27th 2013|
The temperature in the permafrost on Ellesmere Island in the Canadian high Arctic is nearly as cold as that of the surface of Mars. So the recent discovery by a McGill University led team of scientists of a bacterium that is able to thrive at –15ºC, the coldest temperature ever reported for bacterial growth, is exciting. The bacterium offers clues about some of the necessary preconditions for microbial life on both the Saturn moon Enceladus and Mars, where similar briny subzero conditions are thought to exist.
The team of researchers, led by Prof. Lyle Whyte and postdoctoral fellow Nadia Mykytczuk, both from the Dept. of Natural Resource Sciences at McGill University, discovered Planococcus halocryophilus OR1 after screening about 200 separate High Arctic microbes looking for the microorganism best adapted to the harsh conditions of the Arctic permafrost. Read more ..
The Edge of Nature
Moving objects attract greater attention – a fact exploited by video screens in public spaces and animated advertising banners on the Internet. For most animal species, moving objects also play a major role in the processing of sensory impressions in the brain, as they often signal the presence of a welcome prey or an imminent threat. This is also true of the zebrafish larva, which has to react to the movements of its prey. Scientists at the Max Planck Institute for Medical Research in Heidelberg have investigated how the brain uses the information from the visual system for the execution of quicker movements. The animals' visual system records the movements of the prey so that the brain can redirect the animals’ movements through targeted swim bouts in a matter of milliseconds. Two hitherto unknown types of neurons in the mid-brain are involved in the processing of movement stimuli. Read more ..
The Edge of the Cosmos
|Alberto Dominguez||May 25th 2013|
University of California High-Performance AstroComputing Center
How much light has been emitted by all galaxies since the cosmos began? After all, almost every photon (particle of light) from ultraviolet to far infrared wavelengths ever radiated by all galaxies that ever existed throughout cosmic history is still speeding through the Universe today. If we could carefully measure the number and energy (wavelength) of all those photons—not only at the present time, but also back in time—we might learn important secrets about the nature and evolution of the Universe, including how similar or different ancient galaxies were compared to the galaxies we see today.
That bath of ancient and young photons suffusing the Universe today is called the extragalactic background light (EBL). An accurate measurement of the EBL is as fundamental to cosmology as measuring the heat radiation left over from the Big Bang (the cosmic microwave background) at radio wavelengths. A new paper, called "Detection of the Cosmic γ-Ray Horizon from Multiwavelength Observations of Blazars," by Alberto Dominguez and six coauthors, just published today by the Astrophysical Journal—based on observations spanning wavelengths from radio waves to very energetic gamma rays, obtained from several NASA spacecraft and several ground-based telescopes—describes the best measurement yet of the evolution of the EBL over the past 5 billion years. Read more ..
The Digital Edge
Michigan State University
In a study that evaluated some of the latest in automatic facial recognition technology, researchers at Michigan State University were able to quickly identify one of the Boston Marathon bombing suspects from law enforcement video, an experiment that demonstrated the value of such technology.
In the Pattern Recognition and Image Processing laboratory, Anil Jain, MSU Distinguished Professor of computer science and engineering, and Josh Klontz, a research scientist, tested three different facial-recognition systems.
By using actual law-enforcement video from the bombing, they found that one of the three systems could provide a “rank one” identification – a match – of suspect Dzokhar Tsarnaev. “The other suspect, Tamerlan Tsarnaev, the one ultimately killed in the shootout with police, could not be matched at a sufficiently high rank, partly because he was wearing sunglasses,” Jain said. “The younger brother could be identified. Read more ..
The Edge of Medicine
|Jim Erickson||May 23rd 2013|
Whooping cough has exploded in the United States and some other developed countries in recent decades, and many experts suspect ineffective childhood vaccines for the alarming resurgence.
Some say the vaccine wears off quicker than public health officials had previously believed. Others suggest that the vaccine protects against illness but does not prevent transmission of the bacterial disease, which is also known as pertussis.
But a University of Michigan-led research team has concluded that neither of these proposed mechanisms for the resurgence of pertussis is supported by the best available evidence. In a study that reviewed 30 years of data from Thailand, they found that vaccines provided long-lived—possibly lifelong—protection against the disease and substantially reduced transmission, as well.
"What we found goes against much of what is currently suspected about pertussis resurgence," said U-M population ecologist and epidemiologist Pejman Rohani. "It's not difficult for us epidemiologists to propose some possible mechanism behind the resurgence, but what's been missing so far is an effort to challenge each of these hypotheses to explain the data. That's exactly what we did." Read more ..
The Food Edge
|Matthew Hilburn||May 22nd 2013|
Astronauts on future missions to Mars may be able to dial up a pizza via a 3D printer. NASA announced it awarded a $125,000 grant to Systems & Materials Research Corporation’s Anjan Contractor, who has already designed the printer.
The head of the printer will be fed with a combination of nutrients, water, oils and flavors, which can be sprayed, layer by layer to create three dimensional food.
The base ingredients could have a shelf life of up to 30 years. The first test: printing a pizza.
According to a proposal posted on the NASA website in March, “the 3D printing component will deliver macronutrients [starch, protein, and fat], structure, and texture while the ink jet will deliver micronutrients, flavor, and smell.”
“Using unflavored macronutrients, such as protein, starch and fat, the sustenance portion of the diet can be rapidly produced in a variety of shapes and textures directly from the 3D printer [already warm],” according to the proposal. The biggest advantage to 3D food printing, NASA says, is that there is no waste. According to the NASA proposal, printing food could have applications beyond space. Read more ..
The Medical Edge
|Nicole Casal Moore||May 21st 2013|
|Artificial cadaver and implantable defibrillator|
The type of sensors that pick up the rhythm of a beating heart in implanted cardiac defibrillators and pacemakers are vulnerable to tampering, according to a new study conducted in controlled laboratory conditions. Implantable defibrillators monitor the heart for irregular beating and, when necessary, administer an electric shock to bring it back into normal rhythm. Pacemakers use electrical pulses to continuously keep the heart in pace.
In experiments in simulated human models, an international team of researchers demonstrated that they could forge an erratic heartbeat with radio frequency electromagnetic waves. Theoretically, a false signal like the one they created could inhibit needed pacing or induce unnecessary defibrillation shocks. The team includes researchers from the University of Michigan, University of South Carolina, Korea Advanced Institute of Science and Technology, University of Minnesota, University of Massachusetts and Harvard Medical School. Read more ..
The Edge of Disaster
|Jason Socrates Bardi||May 20th 2013|
American Institute of Physics
Earthquakes, tsunamis, and other natural disasters often showcase the worst in human suffering – especially when those disasters strike populations who live in rapidly growing communities in the developing world with poorly enforced or non-existent building codes.
This week in Cancun, a researcher from Yale-National University of Singapore (NUS) College in Singapore is presenting a comparison between large-scale earthquakes and tsunamis in different parts of the world, illustrating how nearly identical natural disasters can play out very differently depending on where they strike.
The aim of the talk at the 2013 Meeting of the Americas, which is sponsored by the American Geophysical Union (AGU), is to focus on the specific role geoscientists can play in disaster risk reduction and how their work should fit in with the roles played by other experts for any given community. Read more ..
Ecology on Edge
The carbon-soaking qualities of Australia’s coastal and marine wetlands are the focus of a new international research project. Experts from 20 countries have this week attended a special seminar in Sydney.
Researchers at the University of Technology Sydney say that seagrass, mangroves and saltmarsh capture carbon up to 40 times faster than forests on land.
Marine wetlands are able to store the carbon for very long periods, but scientists worry that these “critical ecosystems” are being destroyed around the world at a rapid rate by development and pollution. It is estimated that this destruction releases as much as 1 billion tons of carbon dioxide each year into the atmosphere and oceans. That is almost the equivalent of Japan’s yearly emissions. Read more ..
The Healthcare Edge
|Carol Pearson||May 18th 2013|
Two new medical discoveries are raising hopes of containing malaria - the mosquito-borne parasitic disease that each year infects more than 200 million people and claims an estimated 660 thousand lives. Meantime, the World Health Organization is warning about dire consequences if a drug-resistant form of malaria spreads beyond southeast Asia.
Artemisinin has helped cut global malaria deaths by more than 25 percent over the past decade. But now, in parts of Southeast Asia, this drug no longer works. And the World Health Organization's Dr. Shin Young-Soo warns of serious setbacks if drug resistance continues to spread.
"The truth is, that malaria will beat us all unless we do more than what we are doing now, and we do it better," he said. Controlling malaria involves a range of strategies: using insecticidal bed nets to prevent mosquito bites, spraying insecticides, preventive treatment for children and pregnant women, and controlling or changing mosquitoes, or the malaria parasites they carry. Read more ..
The Edge of Healthcare
|Jessica Berman||May 14th 2013|
Scientists have developed an experimental vaccine to treat heroin addicts. Such a vaccine would be a major advance for both public health and safety. Addiction to the powerful, illicit narcotic not only destroys human lives, but also fuels a violent global drug trade.
An estimated 20 million people around the world are addicted to heroin and related opiates. Their addiction, and frequent use of contaminated syringes, put heroin users at risk of a variety of diseases - notably HIV/AIDS and Hepatitis C. They are also more likely to die prematurely, either from a drug overdose or the violence related to drug trafficking. Drug relapse after conventional treatment for heroin addiction is an especially difficult challenge. The experimental vaccine may prevent addiction even if a user is re-exposed to the drug. Read more ..
The Edge of the Universe
|Nicole Casal Moore||May 11th 2013|
An international team of physicists has found the first direct evidence of pear shaped nuclei in exotic atoms. The findings could advance the search for a new fundamental force in nature that could explain why the Big Bang created more matter than antimatter—a pivotal imbalance in the history of everything.
"If equal amounts of matter and antimatter were created at the Big Bang, everything would have annihilated, and there would be no galaxies, stars, planets or people," said Tim Chupp, a University of Michigan professor of physics and biomedical engineering and co-author of a paper on the work published in Nature.
Antimatter particles have the same mass but opposite charge from their matter counterparts. Antimatter is rare in the known universe, flitting briefly in and out of existence in cosmic rays, solar flares and particle accelerators like CERN's Large Hadron Collider, for example. When they find each other, matter and antimatter particles mutually destruct or annihilate. Read more ..
|Laura J. Williams||May 8th 2013|
The human body contains trillions of cells, all derived from a single cell, or zygote, made by the fusion of an egg and a sperm. That single cell contains all the genetic information needed to develop into a human, and passes identical copies of that information to each new cell as it divides into the many diverse types of cells that make up a complex organism like a human being.
If each cell is genetically identical, however, how does it grow to be a skin, blood, nerve, bone or other type of cell? How do stem cells read the same genetic code but divide into very different types?
Researchers at the University of Michigan have found the first direct evidence that cells can distinguish between seemingly identical copies of chromosomes during stem cell division, pointing to the possibility that distinct information on the chromosome copies might underlie the diversification of cell types. Read more ..
|Abigail Klein Leichman||May 7th 2013|
Peel-and-place Bodywell Chip drastically reduces the body’s absorption of radio frequency waves coming from mobile devices.
Concerned about the amount of radiation coming from your cellular phone into your body? You’re not alone.
A multiethnic team of scientists led by Israel-born Florida businessman Haim Einhorn devised the $30 Bodywell Chip using a patented process that reduces the absorption rate of electromagnetic radio frequency (RF) energy by more than 80 percent. The chips are made by Swiss-owned EZ Technologies and tested in US government-certified labs.
Now the push is on to get the chip onto phones before they leave the factory.
Emerging evidence of possible links between mobile phone use and brain tumors, decreased sperm count and other potential health hazards has convinced many countries, including the United States, to require mobile device manufacturers to reduce the specific absorption rate (SAR) — the amount of RF energy absorbed by the body during mobile phone use – to no more than 1.6 watts per kilogram. Read more ..
Edge of Space
In an effort to determine if conditions were ever right on Mars to sustain life, a team of scientists, including a Michigan State University professor, has examined a meteorite that formed on the red planet more than a billion years ago.
And although this team’s work is not specifically solving the mystery, it is laying the groundwork for future researchers to answer this age-old question.
The problem, said MSU geological sciences professor Michael Velbel, is that most meteorites that originated on Mars arrived on Earth so long ago that now they have characteristics that tell of their life on Earth, obscuring any clues it might offer about their time on Mars. Read more ..
The Digital Edge
|Rosanne Skirble||May 4th 2013|
A team of engineers at Harvard University has taken cues from Nature to create the first robotic fly. The mechanical bug has become a platform for a suite of new high-tech integrated systems.
A team of engineers designed a robot to do what a fly does naturally. The tiny machine is the size of a fat housefly. It’s agile and fast. Its miniature flapping wings allow it to hover in place and perform controlled flight maneuvers.
“It’s extremely important for us to think about this as a whole system and not just the sum of a bunch of individual parts," said Robert Wood. Harvard engineering professor Robert Wood has been working on the robotic fly project for over a decade. A few years ago, his team at Harvard’s Wyss Institute for Biologically Inspired Engineering got the go-ahead to start piecing together the components. Read more ..
The Edge of Climate Change
Using a new laboratory technique to analyze fossil snail shells, scientists have gained insights into an abrupt climate shift that transformed the planet nearly 34 million years ago. At that time, the Earth switched from a warm and high-carbon dioxide "greenhouse" state to the lower-carbon dioxide, variable climate of the modern "icehouse" world. Massive ice sheets grew across the Antarctic continent, major animal groups shifted and ocean temperatures decreased by up to 5 degrees Celsius (9 degrees Fahrenheit).
But studies of how this drastic change affected temperatures on land have had mixed results. Some show no appreciable terrestrial climate change; others find cooling of up to 8 C (14.4 F) and large changes in seasonality. Now, a group of American and British scientists — including two from the University of Michigan — has used a new geochemical technique to analyze heavy isotopes of carbon and oxygen in fossil snail shells. They used the method to measure the change in land temperature associated with this shift in global atmospheric carbon dioxide concentrations. Read more ..
The Edge of Medicine
|Microscopic slide of prostate cancer|
Tumor cells secrete signals that call in wound healing cells to the tumor site. In the process, the normal wound healing cells make the tumor cells more aggressive and able to metastasize. Cancer cells are wily, well-traveled adversaries, constantly side-stepping treatments to stop their spread.
But for the first time, scientists at the University of Michigan have decoded the molecular chatter that ramps certain cancer cells into overdrive and can cause tumors to metastasize throughout the body.
Researchers have long known that tumors recruit healing cells, which is a major reason why cancer is so difficult to thwart. This is the first known study to explain the molecular behavior behind the series of changes that happen in the healing cells that result in metastasis.
Russell Taichman, a professor at the U-M School of Dentistry and research associate Younghun Jung looked at prostate and breast tumors. Their study, "Recruitment of mesenchymal stem cells into prostate tumors promotes metastasis," appears in the online journal Nature Communications. Read more ..
The Edge of Space
|David Finley||April 30th 2013|
Staring at a small patch of sky for more than 50 hours with the ultra-sensitive Karl G. Jansky Very Large Array (VLA), astronomers have for the first time identified discrete sources that account for nearly all the radio waves coming from distant galaxies. They found that about 63 percent of the background radio emission comes from galaxies with gorging black holes at their cores and the remaining 37 percent comes from galaxies that are rapidly forming stars.
"The sensitivity and resolution of the VLA, following its decade-long upgrade, made it possible to identify the specific objects responsible for nearly all of the radio background emission coming from beyond our own Milky Way Galaxy," said Jim Condon, of the National Radio Astronomy Observatory (NRAO). "Before we had this capability, we could not detect the numerous faint sources that produce much of the background emission," he added. Read more ..
The Edge of Relativity
|Sean Bettam||April 29th 2013|
University of Toronto
An international team of astronomers and an exotic pair of binary stars have proved that Albert Einstein's theory of relativity is still right, even in the most extreme conditions tested yet. The results of their research are described in the April 26 issue of Science.
"The unusual pair of stars is quite interesting in its own right but we've learned it is also a unique laboratory for testing the limits of one of our most fundamental physical theories, general relativity" says University of Toronto astronomy professor Marten van Kerkwijk, a member of the research team.
What makes the pair of stars exceptional are the unique characteristics of each and their close proximity to each other. One is a tiny but unusually heavy neutron star – one of the most massive confirmed to date. Named PSR J0348+0432, it is the remnant of a supernova explosion, and is twice as heavy as the Sun yet is only 20 kilometres across. The neutron star is a pulsar that gives off radio waves that can be picked up on Earth by radio telescopes. The gravity at its surface is more than 300 billion times stronger than that on Earth and at its centre every sugarcube-sized volume has more than one billion tonnes of matter squeezed into it, roughly the mass of every human past and present. Read more ..
Environment and Society
|Laura Bailey||April 26th 2013|
Long-term exposure to air pollution may be linked to heart attacks and strokes by speeding up atherosclerosis, or "hardening of the arteries," according to a University of Michigan public health researcher and colleagues from across the United States.
Sara Adar, the John Searle Assistant Professor of Epidemiology at the U-M School of Public Health, and Joel Kaufman, professor of environmental and occupational health sciences and medicine at the University of Washington, led the study that found that higher concentrations of fine particulate air pollution (PM2.5) were linked to a faster thickening of the inner two layers of the common carotid artery—an important blood vessel that provides blood to the head, neck and brain. Read more ..
The Edge of Ecology
|Rosanne Skirble||April 25th 2013|
The U.S. space agency is adapting tools it has used to learn about water on the moon, minerals on Mars and the composition of exoplanets to analyze ecosystems on planet Earth. NASA this week finished a month of preliminary high-altitude tests of a new Earth-imaging instrument package, which the agency plans to launch into orbit.
The instruments have been flying on NASA’s ER-2, an aircraft that skirts the edge of space at an altitude of 20,000 meters, nearly two times the cruising altitude of commercial jetliners. The imaging tools gather data about how different wavelengths of light interact with landscape molecules and particles to produce a spectral fingerprint. According to Robert Green, a NASA scientist sensors for an instrument called the Airborne Visible/Infrared Imaging Spectrometer precisely measure the light and temperature characteristics of each ecosystem the plane overflies. Read more ..
The Science of Terrorism
|Diego DiGhero||April 23rd 2013|
Catching terrorists who detonate bombs may be easier by testing the containers that hide the bombs rather than the actual explosives, according to pioneering research led by Michigan State University. Currently, law enforcement labs tend to test for DNA on the exploded bomb fragments – but this has a low success rate, said David Foran, an MSU forensic biologist and lead investigator on the research project.
Through the MSU-led study, researchers obtained DNA from eight backpacks that had been blown up with pipe bombs inside, and subsequently obtained full DNA profiles that matched all eight volunteers who had carried the backpacks for a week. The findings, which appeared in the Journal of Forensic Sciences, could ultimately change the way law enforcement officials investigate bombings, Foran said.
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The Edge of Space
|Suzanne Presto||April 22nd 2013|
Scientists have announced the discovery of three planets, in two planetary systems, that are in or on the edge of the so-called habitable zone, the range that is just the right distance from their stars so they wouldn't be too hot or too cold to have liquid water. They made these discoveries with NASA's Kepler space telescope
William Borucki, the Kepler science principal investigator at NASA's Ames Research Center in California, described the Kepler-62 planetary system, which he says is 1,200 light years away. One light year is 10 trillion kilometers.
Much like our solar system, he said, Kepler-62 is home to two habitable-zone worlds, called Kepler-62e and Kepler-62f. Those planets are about one-and-a-half times the size of Earth.
"In fact, these two planets are our best candidates for planets that might be habitable, not just in the habitable zone," he told reporters at a news conference at Ames. "They're part of a planetary system of five planets that we've discovered so far, but these are the two that are most important."
Borucki said 62e might be a water world, but scientists aren't certain as they only know its radius, not its mass. He says planet 62f, the smaller of the two, might very well be a rocky planet, and possibly have polar caps, significant land masses and water. Read more ..
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