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Natural 3D Counterpart to Graphene Discovered

By Guest PostJanuary 26, 2014Science2d, 2d dirac fermions, 3d version, 3dtds, 3dtds systems, advanced light source, als, antiparticle, berkeley lab, bo zhou, bulk electrons behave, chinese academy, dirac semi metal, electron mobility, graphene, natural 3d counterpart, quantum matter, sciences, sheets of carbon, three-dimensional, topological, topological insulators, velocity, yulin chen, zahid hussain, zhongkai liu

Researchers at Berkeley Lab’s Advanced Light Source Find New Form of Quantum Matter

The discovery of what is essentially a 3D version of graphene – the 2D sheets of carbon through which electrons race at many times the speed at which they move through silicon – promises exciting new things to come for the high-tech industry, including much faster transistors and far more compact hard drives. A collaboration of researchers at the U.S Department of Energy (DOE)’s Lawrence Berkeley National Laboratory (Berkeley Lab) has discovered that sodium bismuthide can exist as a form of quantum matter called a three-dimensional topological Dirac semi-metal (3DTDS). This is the first experimental confirmation of 3D Dirac fermions in the interior or bulk of a material, a novel state that was only recently proposed by theorists. (more…)

Scientists reveal why life got big in the Earth’s early oceans

By Guest PostJanuary 24, 2014Nature, Scienceangeomorphs, cambrian explosion, canada, canopy flow models, complex life, david gold, david jacobs, david johnston, early ocean, earth, ecology, evolutionary biology, fossil community, fossil record, foundations, guy narbonne, harvard, large life forms, life, marc laflamme, matthew clapham, MIT, modeling technique, multicellular eukaryotes, multicellular organism, newfoundland, nutrient carrying, nutrient uptake, nutrients from seawater, ocean flow, queens university, roger summons, uc santa cruz, ucla biologist, university of toronto, variety of scale

Why did life forms first begin to get larger and what advantage did this increase in size provide? UCLA biologists working with an international team of scientists examined the earliest communities of large multicellular organisms in the fossil record to help answer this question. (more…)

Silver Nanowire Sensors Hold Promise for Prosthetics, Robotics

By Guest PostJanuary 23, 2014Sciencecapacitance, curvilinear surface, elastic conductor, monitor thumb movement, north Carolina, physical deformation, prosthetics, prototype application, robotics, shanshan yao, silver nanowire sensors, smartphone touch screen, state university, Technology, variety, yong zhu

North Carolina State University researchers have used silver nanowires to develop wearable, multifunctional sensors that could be used in biomedical, military or athletic applications, including new prosthetics, robotic systems and flexible touch panels. The sensors can measure strain, pressure, human touch and bioelectronic signals such as electrocardiograms.

“The technology is based on either physical deformation or “fringing” electric field changes. The latter is very similar to the mechanism used in smartphone touch screens, but the sensors we’ve developed are stretchable and can be mounted on a variety of curvilinear surfaces such as human skin,” says Shanshan Yao, a Ph.D. student at NC State and lead author of a paper on the work. (more…)

NASA Set for a Big Year in Earth Science

By Guest PostJanuary 23, 2014Scienceaquifer levels, earth science missions, nasa satellites, sea surface salinity, weather forecasting

For the first time in more than a decade, five NASA Earth science missions will be launched into space in the same year, opening new and improved remote eyes to monitor our changing planet. (more…)

Clever chemistry and a new class of antibiotics

By Guest PostJanuary 22, 2014Health, Scienceacyldepsipeptides, adeps, antibacterial drug, antibiotics, attack bacteria, bacterial infection, barrel shaped protein, brown university, cell membrane, clever chemistry, clpp, dangerous bacteria, e faecalis, intramolecular hydrogen bonds, jason sello, karl schmitz, mice, MIT, molecules, new class, potent, rat, resistance to antibiotics, robert sauer, strong bonds, stronger hydrogen bonds

A new class of molecules called acyldepsipeptides — ADEPs — may provide a new way to attack bacteria that have developed resistance to antibiotics. Researchers at Brown and MIT have discovered a way to increase the potency of ADEPs by up to 1,200 times. Their findings appear in the Journal of the American Chemical Society.

PROVIDENCE, R.I. [Brown University] — As concerns about bacterial resistance to antibiotics grow, researchers are racing to find new kinds of drugs to replace ones that are no longer effective. One promising new class of molecules called acyldepsipeptides — ADEPs — kills bacteria in a way that no marketed antibacterial drug does — by altering the pathway through which cells rid themselves of harmful proteins. (more…)

Bat’s sea crossing is first from UK to mainland Europe

By Guest PostJanuary 22, 2014Nature, Scienceautumn, bat, bat conservation trust, bat migration, blagdon near bristol, continental europe, discovery, fiona mathews, lisa worledge, mainland europe, mammal, nathusius pipistrelle, north sea, old historical records, sea crossing, uk, university of exeter

A tiny bat found in the Netherlands is believed to provide the first direct evidence that British bats migrate over the sea between the UK and mainland Europe.

The bat, a Nathusius’ pipistrelle, flew from Blagdon near Bristol across the country and over the North Sea before settling in a farm building near the coast in Friesland – a direct journey of 596 kilometres (370 miles).

Bat experts in both countries are working together to learn more about this remarkable journey and its implications for bat conservation and offshore windfarms. (more…)

NASA Receives Mars 2020 Rover Instrument Proposals for Evaluation

By Guest PostJanuary 21, 2014Science2018 exomars rover, 2020, astrobiology, atmosphere, carbon dioxide, electra telecommunication radios, Environment, esa, european space agency, exploration technology, geological assessment, habitability, hazards, human explorers, humans to mars, instrument, john grunsfeld, landing site, mars, mars 2020 rover, mars in 2030s, mars rover, martian dust, michael gazarik, NASA, oxygen, President Obama, red planet, rocket fuel, space exploration, william gerstenmaier

NASA has received 58 proposals for science and exploration technology instruments to fly aboard the agency’s next Mars rover in 2020, twice the usual number submitted for instrument competitions in the recent past, and an indicator of the extraordinary interest in exploration of the Red Planet.

The agency is beginning a thorough review to determine the best combination of science and exploration technology investigations for the mission and anticipates making final selections in the next five months. (more…)

An old mathematical puzzle soon to be unraveled?

By Guest PostJanuary 21, 2014Sciencecryptography, logical reasoning, mathematical puzzle, prime numbers, twin primes, twin primes conjecture

It is one the oldest mathematical problems in the world. Several centuries ago, the twin primes conjecture was formulated. As its name indicates, this hypothesis, which many science historians have attributed to the Greek mathematician Euclid, deals with prime numbers, those divisible only by themselves and by one (2, 3, 5, 7, 11, etc.). Under this assumption, there exists an infinite number of pairs of prime numbers whose difference is two, called twin primes (e.g., 3 and 5), but nobody has been able to confirm this so far. (more…)

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