To be a swift runner you need strong muscles, a powerful heart, determination and — symmetrical knees? That’s what scientists learned when they studied some of the world’s top sprinters. Among the very best sprinters in the world, knee symmetry predicts who’s going to be the best of the best.
- Plos One
IIT-M Joins CERN to Explore The Secrets of The Universe Led by an expert who was part of the ATLAS experiment that helped find the Higgs Boson by the Large Hadron Collider at CERN, the Indian Institute of Technology - Madras has become a full member of a collaboration with the Geneva-based organisation in search of the structure of the universe.
While reputed institutions including TIFR, BARC and a few others have been partnering with CERN, IIT-M is the first IIT to come on board of the prestigious LHC experiment.
According to Prafulla Kumar Behera, an associate professor with the department of physics, this initiative will help the institute strengthen its capabilities in fundamental research. "CERN is home to a lot of innovations, including the world wide web. This collaboration is like a bridge that would connect us to the highest level of scientific research while offering them our talent and expertise," Behera told The New Indian Express.
Besides him, another faculty, James Libby, and two PhD scholars have come on board on the CMS collaboration.
Deceptive Practices in Drugs Research Could Become Harder The proposed crack-down would close loopholes that allow researchers to hide negative findings and harmful side effects
US government cracks down on clinical-trials reporting
Horizontal gene transfer: Antibiotic genes spread far and wide The genes responsible for antibiotics can spread between the three domains of life—Archaea, Bacteria and Eukaryotes.
The genes for proteins with antibacterial properties are capable of spreading across stunning evolutionary distances (Metcalf et al., 2014). Their results suggest that our search for new antibiotics needs to be broadened if we are to take full advantage of the variety of antibacterial compounds that exist in nature. Genes are able to move between organisms in a process known as horizontal gene transfer. This happens most frequently between individuals of the same, or closely-related species (Andam and Gogarten 2011) and is thought to be responsible for the spread of antibiotic resistance genes between bacteria. However, genes can also occasionally move between distantly-related individuals, including from one domain of life, such as Bacteria, to either Archaea or Eukaryotes (Lundin et al., 2010). Whether a gene is successfully transferred depends on a number of constraints. For instance, if the organisms inhabit different environments, there are fewer opportunities to transfer genes. Once transferred, a gene may not be compatible with the recipient, or may not provide it with an advantage. Despite these constraints, some genes have spread, via horizontal transfer, to all three domains of life, and such transfer events may have been extensive during evolution . http://elifesciences.org/content/3/e05244#sthash.ukduippX.dpuf
New light on heart disease: Scientists now think that inflammation is a key factor in heart disease.
The older thinking was that plaque in coronary arteries caused heart attacks. Now the thinking is that it’s also due to some living tissue under plague that gets inflamed and that disrupts the plaque. We already knew statins ameliorate heart disease, and always thought it was through lipids, but here’s a new pathway. And Statins May Protect People from Air Pollution
Statins, prescribed to lower cholesterol and reduce risks of heart attacks and strokes, seem to diminish inflammation that occurs after people breathe airborne particles. http://www.environmentalhealthnews.org/ehs/news/2014/nov/statins-an...
The studies on these are still underway and we will report them when the results are published.
Hormone estrogen may shield the brain after an injury Inflammation goes down when the sex hormone increases around an injury
Estrogen can protect the brain from harmful inflammation following traumatic injury, a new study in zebra finches suggests. Boosting levels of the sex hormone in the brain might help prevent the cell loss that occurs following damage from injuries such as stroke.
Estrogen levels quadrupled around the damaged area in both male and female zebra finches after researchers gave them experimental brain injuries, Colin Saldanha and colleagues at American University in Washington, D.C., reported November 17 at the annual meeting of the Society for Neuroscience. When the scientists prevented finch brains from making estrogen, inflammatory proteins at damaged sites increased.
The helpful estrogen didn’t come from gonads. It’s made within the brain by support cells called astrocytes close to the injury.
Injury inflames the brain. Initially, this inflammation recruits helpful cells to the damaged area and aids in recovery. But the long-term presence of inflammatory proteins can cause harm, killing off brain cells and reducing functions such as movement and memory. The researchers hope that by understanding how estrogen reduces inflammatory proteins, therapies might boost this natural estrogen production to keep harmful inflammation at bay. - http://www.abstractsonline.com/Plan/ViewAbstract.aspx?sKey=6a2113dc...
Asteroid impacts on Earth may give rise to rare, structurally bizarre diamonds on our planet, a new study suggests.
Scientists have settled a longstanding controversy over a purported rare form of diamond called lonsdaleite - formed by impact shock, but which lacks the three-dimensional regularity of ordinary diamond A group of scientists has now shown that what has been called lonsdaleite is in fact a structurally disordered form of ordinary diamond.
"So-called lonsdaleite is actually the long-familiar cubic form of diamond, but it's full of defects," said Peter Nemeth, a former Arizona State University (ASU) visiting researcher.
These can occur, he said, due to shock metamorphism, plastic deformation or unequilibrated crystal growth
Scientists said that a large meteorite, called Canyon Diablo after the crater it formed on impact in northern Arizona, contained a new form of diamond with a hexagonal structure.
They described it as an impact-related mineral and called it lonsdaleite, after Dame Kathleen Lonsdale, a famous crystallographer.
Since then, "lonsdaleite" has been widely used by scientists as an indicator of ancient asteroidal impacts on Earth, including those linked to mass extinctions.
In addition, it has been thought to have mechanical properties superior to ordinary diamond, giving it high potential industrial significance.
All this focused much interest on the mineral, although pure crystals of it, even tiny ones, have never been found or synthesised. Scientists re-examined Canyon Diablo diamonds and investigated laboratory samples prepared under conditions in which lonsdaleite has been reported.
Using the advanced electron microscopes, the team found, both in the Canyon Diablo and the synthetic samples, new types of diamond twins and nanometre-scale structural complexity. These give rise to features attributed to lonsdaleite
"Most crystals have regular repeating structures, much like the bricks in a well-built wall," said Peter Buseck, from the University of Bayreuth in Germany.
However, interruptions can occur in the regularity, and these are called defects.
"Defects are intermixed with the normal diamond structure, just as if the wall had an occasional half-brick or longer brick or row of bricks that's slightly displaced to one side or another," said Buseck.
The outcome of the new work is that so-called lonsdaleite is the same as the regular cubic form of diamond, but it has been subjected to shock or pressure that caused defects within the crystal structure.
The study was published in the journal Nature Communications.
Beetle behind breath test for bank notes Simply breathing on money could soon reveal if it's the real deal or counterfeit thanks to a beetle-inspired ink that reversibly changes colour in response to humidity. The photonic crystal ink developed by Chinese researchers can produce unique colour changing patterns on surfaces with an inkjet printer system, which would be extremely hard for fraudsters to reproduce. The work also shows promise for other applications including displays and wearable sensors.
Ling Bai and Zhongze Gu and colleagues at Southeast University in Nanjing, China, have developed a photonic crystal ink that mimics the way Tmesisternus isabellae – a species of longhorn beetle – reversibly switches its color from gold to red according to the humidity in its environment.
This color shift is caused by the adsorption of water vapour in their hardened front wings, which alters the thickness and average refractive index of their multilayered scales. To emulate this, the team made their photonic crystal ink using mesoporous silica nanoparticles, which have a large surface area and strong vapour adsorption capabilities that can be precisely controlled.
Using the ink in an inkjet printer, the researchers produced complex patterns on rigid and flexible materials and showed that their colour can be reversibly and precisely controlled – shifting from green to red or yellow for example – in response to nitrogen and ethanol vapours. They even saw patterns change colour simply in response to breathing on them.
Natural shield 11,000 km above Earth stops radiation Researchers from Massachusetts Institute of Technology ( MIT) and University of Colorado in Boulder have discovered an invisible shield some 11,000 kms above Earth that works against the harmful radiation belt.
High above Earth's atmosphere, electrons whiz past at close to the speed of light.
Such ultra-relativistic electrons, which make up the outer band of the Van Allen radiation belt, can streak around the planet in a mere five minutes - bombarding anything in their path. The Van Allen belts are a collection of charged particles - gathered in place by Earth's magnetic field.
Exposure to such high-energy radiation can wreak havoc on satellite electronics and pose serious health risks to astronauts. Rresearchers found no matter where these electrons are circling around the planet's equator, they can get no further than about 11,000 km from the Earth's surface - despite their intense energy. What is keeping this high-energy radiation at bay seems to be neither the Earth's magnetic field nor long-range radio waves but rather a phenomenon termed 'plasmaspheric hiss'. The phenomenon is described as very low-frequency electromagnetic waves in the Earth's upper atmosphere that, when played through a speaker, resemble static or white noise.
The researchers believe that plasmaspheric hiss essentially deflects incoming electrons causing them to collide with neutral gas atoms in the Earth's upper atmosphere and ultimately disappear. The paper on which this report is based was published in the journal Nature.
UNESCO launched the UNESCO World Library of Science (WLoS), a newly created, free online science education resource for a global community of users. Developed through the joint efforts of UNESCO, Nature Education and Roche, the WLoS was created to give students around the world, especially those in disadvantaged regions, access to the latest science information as well as the opportunity to share their experiences and learning through discussion with their peers in a shared learning environment.
Launched on the occasion of World Science Day for Peace and Development 2014, the WLoS is a science resource library stocked with over 300 top-quality articles, 25 eBooks, and over 70 videos from the publishers of Nature, the most cited scientific journal in the world. It is also a state-of-the-art digital platform that provides a community hub for learning. Users can join classes, build groups and connect with other learners.
The Mystery of Why This Dangerous Sand Dune Swallowed a Boy
When a boy suddenly disappeared into a sand dune, a scientist embarked on a quest to find out where he went
But dunes aren’t supposed to contain holes according to science. But this appears to be a new geological phenomenon!
It might have been covered with quick sand. It was found that the entire dune had shifted 134 metres away from the lakefront between 1938 and 2007, swallowing up long-forgotten trees, trails and stairs along the way. Four years later, it was revealed that the dune was flattening out, and the sand that facilitated its movement was coming from inside its inland slope - the area that was open to the public. The slope that swallowed the six year old boy. The age of the materials and the wet conditions during the spring of 2013 may have forced these materials to become unstable, collapsing and creating openings to the surface.
Through brute machine force (because it is difficult to dig sand), Nathan, the boy was uncovered in an unconscious state after 3.5 hours of excavation. Somehow, he'd end up surviving the ordeal, and two weeks later, walked out of the hospital. The doctors suspect either an air pocket in the sand hole saved him, or perhaps his body had reacted to the lack of oxygen by drastically slowing down the operation of his vital organs.
It can , under certain circumstances , shows a new study
Genetic blueprints attached to a rocket survived a short spaceflight and later passed on their biological instructions!
A team of Swiss and German scientists report that they dotted the exterior grooves of a rocket with fragments of DNA to test the genetic material’s stability in space. Surprisingly, they discovered that some of those building blocks of life remained intact during the hostile conditions of the flight and could pass on genetic information even after exiting and reentering the atmosphere during a roughly 13-minute round trip into space.
So, if a cascade of meteors struck Earth billions of years ago, could they have deposited genetic blueprints and forged an indelible link between Earth and another planet?
Perhaps. Although that puzzling question remains unanswered, scientists have uncovered a new clue that suggests it is possible for DNA to withstand the extreme heat and pressure it would encounter when entering our atmosphere from space. The findings suggest that if DNA traveled through space on meteorites, it could have conceivably survived, says lead author Oliver Ullrich of the University of Zurich. Moreover, he says, “DNA attached to a spacecraft has the potential to contaminate other celestial bodies, making it difficult to determine whether a life form existed on another planet or was introduced there by spacecraft.” The rocket test may fall short of representing the faster speed and higher energy of a meteor hurtling into our atmosphere, but it does suggest that even if the outside of a meteor was scorched, genetic material in certain places on the meteor could survive higher temperatures than scientists had previously realized and make it to Earth. The researchers were intrigued to find that the DNA looked intact under a microscope in these experiments. They also put some of the samples to work to see if the DNA remained functionally capable of passing on genetic instructions. The team exposed Escherichia coli bacteria to the space-traveling DNA. If the plasmid DNA were intact — as it proved to be — the E. coli would be able to take up the DNA, and that piece of genetic code would make the bacteria resistant to antibiotics. According to Ullrich, the researchers were surprised to find that the DNA passed on its information and the E. coli became drug resistant. The findings are very exciting.
The GOP Congress is ready to attack science agency funding in 2015. GOP House members have had little success reining in research agencies so far, but, emboldened by their growing majorities, they’re hoping for better luck next year. They plan to push proposals to cut funding for global warming and social science research, put strict new rules on the National Science Foundation’s grant-making process and overhaul how science informs policy making at the EPA.
At the same time, however, researchers and their advocates in the Democratic caucus are taking increasingly aggressive stances of their own: Rather than answer GOP objections one by one, or brush them off, they’re making a larger issue of what they see as heavy-handed interference based on ideology rather than methodology. Opponents in the scientific world and their political allies believe that, at its heart, the GOP assault isn’t about bringing greater accountability to the EPA or NSF, but rather a larger lack of trust in science that could soon spur efforts to micromanage NIH, the Department of Defense and other agencies that, all told, spend tens of billions on scientific research every year.
Researchers warn that funding only science that appears politically safe will stifle innovation and say that the agency actually does an impressive job of choosing which projects to fund. But some in the research community say damage is already being done. Researchers will be less likely to apply for grants to fund unorthodox-sounding now — but potentially groundbreaking — research projects in future years, leaders of the Association of American Universities said recently in a statement.
Scientists and engineers, particularly young ones, should not be discouraged from pursuing unconventional, often groundbreaking scientific research.
More details here: http://www.politico.com/story/2014/11/the-next-battle-in-the-war-on...
On the epoch of the Antikythera mechanism and its eclipse predictor Scientists Have Made a Remarkable Discovery About the World's Oldest "Computer"
According to new research, the ancient Greek Antikythera Mechanism — sometimes called the world's "oldest analog computer" for its ability to predict lunar and solar eclipses and solar, lunar and planetary positions — may be much older than previously thought.
Based on recent analysis of the dials used to predict eclipses, Christián C. Carman, a science historian at the National University of Quilmes in Argentina, and James Evans, a physicist at the University of Puget Sound in Washington, have published new findings suggesting that the machine's dials actually start counting around 205 B.C., which would mean the device is 50 to 100 years older than researchers previously believed.
Researchers observe evolution of life forms that bear hallmarks of multicellular organisms n ground-breaking study a team of researchers has reported the real time evolution of life forms that have all the hallmarks of multicellular organisms.
The researchers from New Zealand, Germany and the USA at the Max Planck Institute for Evolutionary Biology have observed in real time the evolution of simple self-reproducing groups of cells from previously individual cells.
The nascent organisms are comprised of a single tissue dedicated to acquiring oxygen, but this tissue also generates cells that are the seeds of future generations: a reproductive division of labour.
Intriguingly, the cells that serve as a germ line were derived from cheating cells whose destructive effects were tamed by integration into a life cycle that allowed groups to reproduce.
The life cycle turned out to be a spectacular gift to evolution and rather than working directly on cells, evolution was able to work on a developmental programme that eventually merged cells into a single organism.
When this happened groups began to prosper with the once free-living cells coming to work for the good of the whole.
When single bacterial cells of Pseudomonas fluorescens are grown in unshaken test tubes the cellular collectives prosper because they form mats at the surface of liquids where the cells gain access to oxygen that is otherwise in the liquid unavailable.
Lead author Paul Rainey explained that simple cooperating groups, like the mats that interest people, stand as one possible origin of multicellular life, but no sooner do the mats arise, than they fail, which is the same process that ensures their success, natural selection, ensures their demise.
Dynamic mechanical behavior of multilayer graphene via supersonic projectile penetration A new study results suggest graphene may absorb 10 times the amount of energy steel can before failing. The bullet was propelled into stacked graphene sheets at supersonic speeds of up to 2000mph by the gases produced by laser pulses rapidly evaporating a gold film. The team calculated the energy difference of the bullet before and after to determine the energy absorbed.
Graphene was able to absorb up to 0.92MJ/kg of ballistic energy in the test, with cracks forming around the impact zone. By comparison, steel targets only absorbed up to 0.08MJ/kg at the same speed.
The trick lies in energy absorption. If you can nucleate many cracks, it is a way of spreading the impact into more material. It is similar to that of tempered safety glass, a material engineered to spread damage and not locate it to a point. Graphene’s high performance is down to its high stiffness and low density, both of which control the speed of sound in the material. The stiffer and lighter the material is, the faster sound, stress and energy can travel through it. If you are able to spread the energy at higher speeds across the target area, more of the material will support the load and reduce the damaging effect of the bullet. Graphene’s dynamic strength is significant as it may behave similarly to materials specifically engineered to stop bullets, such as Kevlar, a fabric composed of aromatic polyamide threads. http://www.sciencemag.org/content/346/6213/1092
How Scientists Gained the Ability to Reverse Overdoses
Naloxone reverses the process by acting like a toddler grabbing for another child's toy, preventing death by shoving the opiate out of the way and binding to the receptor itself. This sends the user into immediate withdrawal. The side-effects – dizziness, nausea, shaking, sweating – are unpleasant but not overly dangerous. And if someone hasn't used any opioids, naloxone will have no effect, positive or negative. http://gizmodo.com/how-scientists-gained-the-ability-to-reverse-ove...
Saved: How addicts gained the power to reverse overdoses http://mosaicscience.com/story/saved-how-addicts-gained-power-rever...
Scientists push for 'scientific integrity' at bargaining table Canada’s federal scientists are going to the bargaining table this week with an unprecedented package of contract changes to promote “scientific integrity” in government, including the right of scientists to speak freely and forbidding political interference in their work. http://ottawacitizen.com/news/politics/scientists-push-for-scientif...
New HIV Mutations Welcome News for the Science Community In a recent paper now published in Proceedings of the National Academy of Sciences, Oxford University researchers have found out that the virus is becoming weaker as patients have more access to antiretroviral drugs, some of which are really potent.
Furthermore, like most viruses, HIV mutates as well, going against the immunity of a patient. While this doesn't mean that the patient is already free of the virus, it means that its progression to AIDS is much slower. http://www.youthhealthmag.com/articles/3804/20141202/hiv-antiretrov...
World-first artificial enzymes suggest life doesn't need DNA or RNA
For the first time, scientists have built artificial enzymes using lab-grown genetic material called XNA. The experiment bolsters the idea that life could evolve without what we thought to be the fundamental building blocks of life - DNA and RNA. Scientists in the UK have created synthetic enzymes - vital catalysts needed to support life - from scratch, using genetic material created in the lab. These enzymes don’t contain DNA or RNA, they contain artificial XNA - xeno nucleic acid - and could be used to produce new medical treatments and find life on other planets.
Catalysts from synthetic genetic polymers http://www.nature.com/nature/journal/vaop/ncurrent/full/nature13982...
Passive radiative cooling below ambient air temperature under direct sunlight New material uses the cold darkness of the Universe to cool your house
New technology takes the heat from your house and beams it straight into outer space. And it’s so efficient it could replace air conditioning. Engineers from Stanford University in the US have created a material that keeps your house cool by beaming heat back into the “cold darkness of the Universe”.
The material reflects sunlight, just like a regular mirror, but most importantly, it also beams heat from inside a building straight into outer space. This means that it lowers the temperature of anything that’s it’s placed on by up to five degrees, even if it’s sitting in direct sunlight - and all without electricity.
The material works using a phenomenon called radiative cooling, which is a way of passively transferring heat from one place to somewhere cooler. The phenomenon already happens all the time - our body emits heat into the cooler air around us, and if it’s cold outside, our house will lose heat to the atmosphere. http://www.nature.com/nature/journal/v515/n7528/full/nature13883.html
Study proves we CAN see ‘invisible’ infrared light
Our basic human eyes, usually deprived of the majority of the wavelengths in the world, are actually capable of detecting infrared light, new research proves. We just need a rapidly-pulsing laser to beam it into our retinas. Humans are notoriously limited when it comes to eyesight - while we can see all the beautiful colours of the rainbow within our visible spectrum, wavelengths such as X-rays, radio waves and infrared are all invisible to us.
But now scientists have proved that our retina cells can see infrared light waves after all, we just need them to hit our eyes in the right way. The research will now help scientists to better test people's eyesight and potentially even improve it.
The researchers, from Washington University School of Medicine in St Louis, tested cells from retinas of mice and humans using powerful lasers emitting pulses of infrared light. They found that when the light-sensing cells of retinas get a double hit of infrared energy, our eyes are able to detect light that falls outside our visible spectrum. We're using what we learned in these experiments to try to develop a new tool that would allow physicians to not only examine the eye but also to stimulate specific parts of the retina to determine whether it's functioning properly," said senior researcher Vladimir J. Kefalov in a press release. "We hope that ultimately this discovery will have some very practical applications.
Human infrared vision is triggered by two-photon chromophore isomerization http://www.pnas.org/content/early/2014/11/25/1410162111
Evidence of Polyethylene Biodegradation by Bacterial Strains from the Guts of Plastic-Eating Waxworms Abstract: Polyethylene (PE) has been considered nonbiodegradable for decades. Although the biodegradation of PE by bacterial cultures has been occasionally described, valid evidence of PE biodegradation has remained limited in the literature. We found that waxworms, or Indian mealmoths (the larvae of Plodia interpunctella), were capable of chewing and eating PE films. Two bacterial strains capable of degrading PE were isolated from this worm’s gut, Enterobacter asburiae YT1 and Bacillus sp. YP1. Over a 28-day incubation period of the two strains on PE films, viable biofilms formed, and the PE films’ hydrophobicity decreased. Obvious damage, including pits and cavities (0.3–0.4 μm in depth), was observed on the surfaces of the PE films using scanning electron microscopy (SEM) and atomic force microscopy (AFM). The formation of carbonyl groups was verified using X-ray photoelectron spectroscopy (XPS) and microattenuated total reflectance/Fourier transform infrared (micro-ATR/FTIR) imaging microscope. Suspension cultures of YT1 and YP1 (108 cells/mL) were able to degrade approximately 6.1 ± 0.3% and 10.7 ± 0.2% of the PE films (100 mg), respectively, over a 60-day incubation period. The molecular weights of the residual PE films were lower, and the release of 12 water-soluble daughter products was also detected. The results demonstrated the presence of PE-degrading bacteria in the guts of waxworms and provided promising evidence for the biodegradation of PE in the environment. http://pubs.acs.org/doi/abs/10.1021/es504038a?source=cen
Physicists achieve superconductivity at room temperature
German researchers have figured out how to put a piece of ceramic in a superconducting state at room temperature - no cooling required. Physicists from the Max Planck Institute for the Structure and Dynamics of Matter have kept a piece of ceramic in a superconducting state, disproving the widely-held assumption that materials need to be cooled to temperatures of at least -140 degrees Celsius to achieve superconductivity.
Superconducting materials have the potential to change everything that relies on electrical power, such as power grids, transportation, and renewable energy sources. This is because they’re able to transport electric currents without any resistance, which means they’re incredibly efficient and cost-effective to run. Except right now, they’re not, because in order to get a material to a superconducting state, it needs to be cooled to near absolute zero temperatures, which has really hampered the potential of this technology up to this point. Over the past few decades, scientists have come to realise that metals cooled to temperatures of around -273 degrees Celsius using liquid nitrogen or helium aren’t the only materials capable of reaching a superconducting state. During the 1980s, it was discovered that ceramic materials can reach this state at significantly higher (and yet still extremely cold) temperatures of around -200 degrees Celsius. This is why they’re called high-temperature superconductors.
One such ceramic material, called yttrium barium copper oxide (YBCO), has since been singled out, thanks to its great potential for use in a range of technical applications such as superconducting cables, electrical motors, and generators. Made from super-thin double layers of a copper oxide material stacked in-between layers made from barium, copper and oxygen, this material is designed to allow the bonding of electrons into what’s known as Cooper pairs.
These Cooper pairs of electrons are able to ‘tunnel’ between the alternating layers "like ghosts can pass through walls, figuratively speaking - a typical quantum effect,” they report, but it was thought this could only occur at super-cooled temperatures.
But then the physicists from Max Planck decided to see what would happen if they irradiated the YBCO ceramic material with infrared laser pulses. They found that for a fraction of a second, the ceramic becomes superconducting at room temperature. And when we say “a fraction of a second”, they mean a fraction. “It was only a few millionths of a millisecond” . "That's a very, very brief lifespan for our amazing new room temperature superconductor. However, the successful experiment is proof that such a thing is possible." http://phys.org/news/2014-12-superconductivity-cooling.html
16 Years Ago, A Doctor Published A Study. It Was Completely Made Up, And It Made Us All Sicker.
Once upon a time, a scientist named Dr. Andrew Wakefield published in the medical journal The Lancet that he had discovered a link between autism and vaccines.
After years of controversy and making parents mistrust vaccines, along with collecting $674,000 from lawyers who would benefit from suing vaccine makers, it was discovered he had made the whole thing up. The Lancet publicly apologized and reported that further investigation led to the discovery that he had fabricated everything.
In the intervening years, millions have been spent on studying this further to see if there was anything that could connect autism and vaccines.
New drug eliminates the malaria parasite within 48 hours in mice
A promising new compound tricks the immune system into destroying red blood cells infected with the malaria parasite in just two days. Trials are now planned in humans. An international team of scientists has developed an anti-malarial compound that triggers the immune system to destroy red blood cells infected by malaria, but leaves healthy cells unharmed.
The compound, known as (+)-SJ733, has already been tested in mice, and a single dose has been shown to kill 80 percent of malaria parasites in the bloodstream within 24 hours. Within 48 hours the parasite was completely undetectable. http://www.sciencedaily.com/releases/2014/12/141205175027.htm
In 1911, Albert Einstein Told Marie Curie To Ignore The Trolls! A letter addressed from Einstein to famed physicist, chemist, and two-time Nobel-Laureate, Marie Curie tells her to ignore the trolls. Read it here: http://einsteinpapers.press.princeton.edu/vol8-trans/34
And his reply to a female fan:
Albert Einstein's Reply to a Female Fan's Confession Should Be in Every Science Textbook
when she said: "I hope you will not think any the less of me for being a girl!"
"I hope you will not think any the less of me for being a girl!"
This plea was sent to Albert Einstein by a young South African in the 1940s, and was recently unearthed as part of Alice Caprice's Dear Professor Einstein: Albert Einstein's Letters to and from Chil.... Although brief, Tyfanny's words capture the self-consciousness and self-doubt that have for so long plagued women who aspire to careers in science and technology.
In the letter, dated Sept. 19, 1946, a seemingly agonized Tyfanny admits to Einstein that she has left out a potentially damaging detail about herself. "I forgot to tell you, in my last letter, that I was a girl. I mean I am a girl," the young scientist writes. "I have always regretted this a great deal, but by now I have become more or less resigned to the fact."
The physicist's pithy response is a timeless lesson that bears repeating, all these decades later. "I do not mind that you are a girl, but the main thing is that you yourself do not mind," the Nobel Prize winner replied. "There is no reason for it."
Cancer biology reproducibility effort eLife has published the first papers from the Reproducibility Project: Cancer Biology.
First announced in October 2013 with $1.3 million in funding from the Laura and John Arnold Foundation, The Reproducibility Project: Cancer Biology (RP:CB) aims to replicate key experimental findings in 50 high-profile cancer biology papers published between 2010 and 2012. The project is a partnership between the Center for Open Science, Science Exchange, and eLife. Following an earlier effort by the Center for Open Science, in psychology research, the outputs of the cancer biology project are being published in two distinct phases. The first phase involves the production of a Registered Report – a novel publishing format that sets out how the replications will be performed, the reagents and protocols, the sample sizes, and the planned analyses. The replications will be performed by laboratories that are part of the Science Exchange network. The second phase is the publication of these results in a Replication Study. Both the Registered Report and the Replication Study are subject to eLife’s rigorous and consultative peer review process.
The Reproducibility Project: Cancer Biology will generate a high-quality dataset to explore questions about the reproducibility of research, and will make all data, analysis and other research materials openly available to the research community.
Cilia and Diseases In recent decades, cilia have moved from relative obscurity to a position of importance for understanding multiple complex human diseases. Now termed the ciliopathies, these diseases inflict devastating effects on millions of people worldwide. In this review, written primarily for teachers and students who may not yet be aware of the recent exciting developments in this field, we provide a general overview of our current understanding of cilia and human disease. We start with an introduction to cilia structure and assembly and indicate where they are found in the human body. We then discuss the clinical features of selected ciliopathies, with an emphasis on primary ciliary dyskinesia, polycystic kidney disease, and retinal degeneration. The history of ciliopathy research involves a fascinating interplay between basic and clinical sciences, highlighted in a timeline. Finally, we summarize the relative strengths of individual model organisms for ciliopathy research; many of these are suitable for classroom use. http://bioscience.oxfordjournals.org/content/64/12/1126 http://www.scientificamerican.com/article/why-scientists-are-blamin...
Even in Our Digital Age, Early Parental Writing Support Is Key to Children's Literacy A new Tel Aviv University study says that preschoolers should be encouraged to write at a young age — even before they make their first step into a classroom.
A new study published in the Early Childhood Research Quarterly explains why early writing, preceding any formal education, plays an instrumental role in improving a child's literacy level, vocabulary, and fine motor skills. The research, conducted by Prof. Dorit Aram of TAU's Jaime and Joan Constantiner School of Education in collaboration with Prof. Samantha W. Bindman of the University of Illinois at Urbana-Champaign and other colleagues in the US, assessed the merits of early parental mediation of children's literacy and language in English, and recommended useful techniques to that end. http://www.sciguru.org/newsitem/18089/even-our-digital-age-early-pa...
A flock of genomes http://www.sciencemag.org/content/346/6215/1308
A remarkable international effort to map out the avian tree of life has revealed how birds evolved after the mass extinction that wiped out the dinosaurs into more than 10,000 species alive today. More than 200 scientists in 20 countries joined forces to create the evolutionary tree, which reveals how birds gained their colourful feathers, lost their teeth, and learned to sing songs.
The project has thrown up extraordinary similarities between the brain circuits that allow humans to speak and those that give some birds song: a case of common biology being arrived at via different evolutionary routes. Members of the project, named the Avian Phylogenomics Consortium, published the family tree and their analysis on Thursday in eight main papers in the journal Science, and in more than 20 others in different scientific journals.
Scientists crack stem cell reprogramming code A Canadian-led international team of researchers has begun solving the mystery of just how a specialized cell taken from a person’s skin is reprogrammed into an embryonic-like stem cell, from which virtually any other cell type in the body can be generated.
The research is being touted as a breakthrough in regenerative medicine that will allow scientists to one day harness stem cells to treat or even cure a host of conditions, from blindness and Parkinson’s disease to diabetes and spinal cord injuries.
Besides creating the reprogramming roadmap, the scientists also identified a new type of stem cell, called an F-class stem cell due to its fuzzy appearance. Their work is detailed in five papers published on 10th Dec., 2014 in the prestigious journals Nature and Nature Communications.
Rosetta's new light on Cometary Origins of Earth’s Oceans
The provenance of water and organic compounds on the Earth and other terrestrial planets has been discussed for a long time without reaching a consensus. One of the best means to distinguish between different scenarios is by determining the D/H ratios in the reservoirs for comets and the Earth’s oceans. Here we report the direct in situ measurement of the D/H ratio in the Jupiter family comet 67P/Churyumov-Gerasimenko by the ROSINA mass spectrometer aboard ESA’s Rosetta spacecraft, which is found to be (5.3 ± 0.7) × 10−4, that is, ~3 times the terrestrial value. Previous cometary measurements and our new finding suggest a wide range of D/H ratios in the water within Jupiter family objects and preclude the idea that this reservoir is solely composed of Earth ocean-like water.
In the case of Earth’s oceans, it may not be either comets or asteroids that delivered them, but rather a significant mixture of both.
But the results form Rosetta show comets are not likely to have come through asteroid collisions. The water on Earth has a particular ratio of molecular isotopes - normal water and heavy water - and the water found on 67P has a ratio three times greater. This almost certainly rules out comets as source of earth's water.
Rosetta casts doubt on comets as Earth’s water providers
Comet 67P’s atmosphere contains a surprisingly high fraction of deuterium
Researchers use real data rather than theory to measure the cosmos For the first time researchers have measured large distances in the Universe using data, rather than calculations related to general relativity.
A research team from Imperial College London and the University of Barcelona has used data from astronomical surveys to measure a standard distance that is central to our understanding of the expansion of the universe. -Imperial College London
Invisible 'pain beam' to disperse crowds during disturbances A long range and non-lethal 'pain beam' weapon that can be used to break up riots or protests from a distance. The Poly WB-1, which was unveiled at an air show in China, uses a millimetre-wave beam that can travel distances of up to one kilometre. When the beam reaches a person, it heats water molecules just below the skin, causing intense pain. While a short burst with the pain beam will cause a human to recoil in pain, longer bursts at certain frequencies will cause the flesh to burn and blister.
The system is very similar to the Active Denial System created by Raytheon, which was sent to Afghanistan but not used in combat due to fears it would fuel enemy propaganda and because it used so much power and took too much time to boot up. In tests of that system, most humans reach their pain threshold within three seconds, and none could withstand longer than five seconds. "For the first millisecond, it just felt like the skin was warming up. Then it got warmer and warmer and you felt like it was on fire ... As soon as you're away from that beam your skin returns to normal and there is no pain," said a spokesman from the Air Force research lab that made the system.
China is developing the weapon for naval the weapon for naval applications to help deal with con frontation in non-lethal ways. There are a number of territorial disputes in the South China and East China seas, involving various islands and boundaries. At the moment, the weapon needs to be attached to a large truck - so no non-lethal ray guns quite yet.
Dr. Krishna Kumari Challa
To be a swift runner you need strong muscles, a powerful heart, determination and — symmetrical knees? That’s what scientists learned when they studied some of the world’s top sprinters.
Among the very best sprinters in the world, knee symmetry predicts who’s going to be the best of the best.
- Plos One
Nov 22, 2014
Dr. Krishna Kumari Challa
IIT-M Joins CERN to Explore The Secrets of The Universe
Led by an expert who was part of the ATLAS experiment that helped find the Higgs Boson by the Large Hadron Collider at CERN, the Indian Institute of Technology - Madras has become a full member of a collaboration with the Geneva-based organisation in search of the structure of the universe.
While reputed institutions including TIFR, BARC and a few others have been partnering with CERN, IIT-M is the first IIT to come on board of the prestigious LHC experiment.
According to Prafulla Kumar Behera, an associate professor with the department of physics, this initiative will help the institute strengthen its capabilities in fundamental research. "CERN is home to a lot of innovations, including the world wide web. This collaboration is like a bridge that would connect us to the highest level of scientific research while offering them our talent and expertise," Behera told The New Indian Express.
Besides him, another faculty, James Libby, and two PhD scholars have come on board on the CMS collaboration.
Nov 24, 2014
Dr. Krishna Kumari Challa
Tufts Study Finds Big Rise In Cost Of Drug Development
Pharmaceuticals: Benchmark report sees the cost of bringing a drug to market approaching $3 billion
http://cen.acs.org/articles/92/web/2014/11/Tufts-Study-Finds-Big-Ri...
Nov 25, 2014
Dr. Krishna Kumari Challa
Deceptive Practices in Drugs Research Could Become Harder
The proposed crack-down would close loopholes that allow researchers to hide negative findings and harmful side effects
US government cracks down on clinical-trials reporting
Proposed regulations would close loopholes that allow researchers to hide negative data.
http://www.nature.com/news/us-government-cracks-down-on-clinical-tr...
Nov 25, 2014
Dr. Krishna Kumari Challa
Horizontal gene transfer: Antibiotic genes spread far and wide
The genes responsible for antibiotics can spread between the three domains of life—Archaea, Bacteria and Eukaryotes.
The genes for proteins with antibacterial properties are capable of spreading across stunning evolutionary distances (Metcalf et al., 2014). Their results suggest that our search for new antibiotics needs to be broadened if we are to take full advantage of the variety of antibacterial compounds that exist in nature.
Genes are able to move between organisms in a process known as horizontal gene transfer. This happens most frequently between individuals of the same, or closely-related species (Andam and Gogarten 2011) and is thought to be responsible for the spread of antibiotic resistance genes between bacteria. However, genes can also occasionally move between distantly-related individuals, including from one domain of life, such as Bacteria, to either Archaea or Eukaryotes (Lundin et al., 2010). Whether a gene is successfully transferred depends on a number of constraints. For instance, if the organisms inhabit different environments, there are fewer opportunities to transfer genes. Once transferred, a gene may not be compatible with the recipient, or may not provide it with an advantage. Despite these constraints, some genes have spread, via horizontal transfer, to all three domains of life, and such transfer events may have been extensive during evolution .
http://elifesciences.org/content/3/e05244#sthash.ukduippX.dpuf
Nov 26, 2014
Dr. Krishna Kumari Challa
How DNA Damage Leads To Cancer
Scientists have identified the protein Rad54B as a key regulator of genomic stability, making it a potential target for cancer therapy.
http://www.nature.com/ncomms/2014/141111/ncomms6426/full/ncomms6426...
Nov 26, 2014
Dr. Krishna Kumari Challa
New light on heart disease:
Scientists now think that inflammation is a key factor in heart disease.
The older thinking was that plaque in coronary arteries caused heart attacks. Now the thinking is that it’s also due to some living tissue under plague that gets inflamed and that disrupts the plaque. We already knew statins ameliorate heart disease, and always thought it was through lipids, but here’s a new pathway.
And Statins May Protect People from Air Pollution
Statins, prescribed to lower cholesterol and reduce risks of heart attacks and strokes, seem to diminish inflammation that occurs after people breathe airborne particles.
http://www.environmentalhealthnews.org/ehs/news/2014/nov/statins-an...
The studies on these are still underway and we will report them when the results are published.
Nov 26, 2014
Dr. Krishna Kumari Challa
Hormone estrogen may shield the brain after an injury
Inflammation goes down when the sex hormone increases around an injury
Estrogen can protect the brain from harmful inflammation following traumatic injury, a new study in zebra finches suggests. Boosting levels of the sex hormone in the brain might help prevent the cell loss that occurs following damage from injuries such as stroke.
Estrogen levels quadrupled around the damaged area in both male and female zebra finches after researchers gave them experimental brain injuries, Colin Saldanha and colleagues at American University in Washington, D.C., reported November 17 at the annual meeting of the Society for Neuroscience. When the scientists prevented finch brains from making estrogen, inflammatory proteins at damaged sites increased.
The helpful estrogen didn’t come from gonads. It’s made within the brain by support cells called astrocytes close to the injury.
Injury inflames the brain. Initially, this inflammation recruits helpful cells to the damaged area and aids in recovery. But the long-term presence of inflammatory proteins can cause harm, killing off brain cells and reducing functions such as movement and memory. The researchers hope that by understanding how estrogen reduces inflammatory proteins, therapies might boost this natural estrogen production to keep harmful inflammation at bay.
- http://www.abstractsonline.com/Plan/ViewAbstract.aspx?sKey=6a2113dc...
Nov 26, 2014
Dr. Krishna Kumari Challa
Asteroid impacts on Earth may give rise to rare, structurally bizarre diamonds on our planet, a new study suggests.
Scientists have settled a longstanding controversy over a purported rare form of diamond called lonsdaleite - formed by impact shock, but which lacks the three-dimensional regularity of ordinary diamond
A group of scientists has now shown that what has been called lonsdaleite is in fact a structurally disordered form of ordinary diamond.
"So-called lonsdaleite is actually the long-familiar cubic form of diamond, but it's full of defects," said Peter Nemeth, a former Arizona State University (ASU) visiting researcher.
These can occur, he said, due to shock metamorphism, plastic deformation or unequilibrated crystal growth
Scientists said that a large meteorite, called Canyon Diablo after the crater it formed on impact in northern Arizona, contained a new form of diamond with a hexagonal structure.
They described it as an impact-related mineral and called it lonsdaleite, after Dame Kathleen Lonsdale, a famous crystallographer.
Since then, "lonsdaleite" has been widely used by scientists as an indicator of ancient asteroidal impacts on Earth, including those linked to mass extinctions.
In addition, it has been thought to have mechanical properties superior to ordinary diamond, giving it high potential industrial significance.
All this focused much interest on the mineral, although pure crystals of it, even tiny ones, have never been found or synthesised.
Scientists re-examined Canyon Diablo diamonds and investigated laboratory samples prepared under conditions in which lonsdaleite has been reported.
Using the advanced electron microscopes, the team found, both in the Canyon Diablo and the synthetic samples, new types of diamond twins and nanometre-scale structural complexity. These give rise to features attributed to lonsdaleite
"Most crystals have regular repeating structures, much like the bricks in a well-built wall," said Peter Buseck, from the University of Bayreuth in Germany.
However, interruptions can occur in the regularity, and these are called defects.
"Defects are intermixed with the normal diamond structure, just as if the wall had an occasional half-brick or longer brick or row of bricks that's slightly displaced to one side or another," said Buseck.
The outcome of the new work is that so-called lonsdaleite is the same as the regular cubic form of diamond, but it has been subjected to shock or pressure that caused defects within the crystal structure.
The study was published in the journal Nature Communications.
Nov 27, 2014
Dr. Krishna Kumari Challa
India is home to one of the highest proportions of threatened species in the world
http://www.livemint.com/Politics/V5SjMWmLe30Z1c9gr1iqxK/Indias-wild...
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Nov 27, 2014
Dr. Krishna Kumari Challa
Beetle behind breath test for bank notes
Simply breathing on money could soon reveal if it's the real deal or counterfeit thanks to a beetle-inspired ink that reversibly changes colour in response to humidity. The photonic crystal ink developed by Chinese researchers can produce unique colour changing patterns on surfaces with an inkjet printer system, which would be extremely hard for fraudsters to reproduce. The work also shows promise for other applications including displays and wearable sensors.
Ling Bai and Zhongze Gu and colleagues at Southeast University in Nanjing, China, have developed a photonic crystal ink that mimics the way Tmesisternus isabellae – a species of longhorn beetle – reversibly switches its color from gold to red according to the humidity in its environment.
This color shift is caused by the adsorption of water vapour in their hardened front wings, which alters the thickness and average refractive index of their multilayered scales. To emulate this, the team made their photonic crystal ink using mesoporous silica nanoparticles, which have a large surface area and strong vapour adsorption capabilities that can be precisely controlled.
Using the ink in an inkjet printer, the researchers produced complex patterns on rigid and flexible materials and showed that their colour can be reversibly and precisely controlled – shifting from green to red or yellow for example – in response to nitrogen and ethanol vapours. They even saw patterns change colour simply in response to breathing on them.
http://www.rsc.org/chemistryworld/2014/11/beetle-behind-breath-test...
Nov 27, 2014
Dr. Krishna Kumari Challa
Natural shield 11,000 km above Earth stops radiation
Researchers from Massachusetts Institute of Technology ( MIT) and University of Colorado in Boulder have discovered an invisible shield some 11,000 kms above Earth that works against the harmful radiation belt.
High above Earth's atmosphere, electrons whiz past at close to the speed of light.
Such ultra-relativistic electrons, which make up the outer band of the Van Allen radiation belt, can streak around the planet in a mere five minutes - bombarding anything in their path.
The Van Allen belts are a collection of charged particles - gathered in place by Earth's magnetic field.
Exposure to such high-energy radiation can wreak havoc on satellite electronics and pose serious health risks to astronauts. Rresearchers found no matter where these electrons are circling around the planet's equator, they can get no further than about 11,000 km from the Earth's surface - despite their intense energy. What is keeping this high-energy radiation at bay seems to be neither the Earth's magnetic field nor long-range radio waves but rather a phenomenon termed 'plasmaspheric hiss'.
The phenomenon is described as very low-frequency electromagnetic waves in the Earth's upper atmosphere that, when played through a speaker, resemble static or white noise.
The researchers believe that plasmaspheric hiss essentially deflects incoming electrons causing them to collide with neutral gas atoms in the Earth's upper atmosphere and ultimately disappear.
The paper on which this report is based was published in the journal Nature.
Nov 28, 2014
Dr. Krishna Kumari Challa
Tuesday, 25th November 2014
UNESCO Launches Online Science Education Resource
From UNESCO:
UNESCO launched the UNESCO World Library of Science (WLoS), a newly created, free online science education resource for a global community of users. Developed through the joint efforts of UNESCO, Nature Education and Roche, the WLoS was created to give students around the world, especially those in disadvantaged regions, access to the latest science information as well as the opportunity to share their experiences and learning through discussion with their peers in a shared learning environment.
Launched on the occasion of World Science Day for Peace and Development 2014, the WLoS is a science resource library stocked with over 300 top-quality articles, 25 eBooks, and over 70 videos from the publishers of Nature, the most cited scientific journal in the world. It is also a state-of-the-art digital platform that provides a community hub for learning. Users can join classes, build groups and connect with other learners.
http://www.unesco.org/new/en/natural-sciences/about-us/single-view/...
Nov 28, 2014
Dr. Krishna Kumari Challa
Can sand dunes swallow people?
Yes, they can!
The Mystery of Why This Dangerous Sand Dune Swallowed a Boy
When a boy suddenly disappeared into a sand dune, a scientist embarked on a quest to find out where he went
But dunes aren’t supposed to contain holes according to science. But this appears to be a new geological phenomenon!http://www.smithsonianmag.com/science-nature/mystery-why-dangerous-...
Nov 29, 2014
Dr. Krishna Kumari Challa
Can DNA survive space travel?
It can , under certain circumstances , shows a new study
Perhaps. Although that puzzling question remains unanswered, scientists have uncovered a new clue that suggests it is possible for DNA to withstand the extreme heat and pressure it would encounter when entering our atmosphere from space. The findings suggest that if DNA traveled through space on meteorites, it could have conceivably survived, says lead author Oliver Ullrich of the University of Zurich. Moreover, he says, “DNA attached to a spacecraft has the potential to contaminate other celestial bodies, making it difficult to determine whether a life form existed on another planet or was introduced there by spacecraft.” The rocket test may fall short of representing the faster speed and higher energy of a meteor hurtling into our atmosphere, but it does suggest that even if the outside of a meteor was scorched, genetic material in certain places on the meteor could survive higher temperatures than scientists had previously realized and make it to Earth. The researchers were intrigued to find that the DNA looked intact under a microscope in these experiments. They also put some of the samples to work to see if the DNA remained functionally capable of passing on genetic instructions. The team exposed Escherichia coli bacteria to the space-traveling DNA. If the plasmid DNA were intact — as it proved to be — the E. coli would be able to take up the DNA, and that piece of genetic code would make the bacteria resistant to antibiotics. According to Ullrich, the researchers were surprised to find that the DNA passed on its information and the E. coli became drug resistant. The findings are very exciting.
http://www.plosone.org/article/info%3Adoi%2F10.1371%2Fjournal.pone....
Nov 29, 2014
Dr. Krishna Kumari Challa
Next battle in the war on science
The GOP Congress is ready to attack science agency funding in 2015.
GOP House members have had little success reining in research agencies so far, but, emboldened by their growing majorities, they’re hoping for better luck next year. They plan to push proposals to cut funding for global warming and social science research, put strict new rules on the National Science Foundation’s grant-making process and overhaul how science informs policy making at the EPA.
At the same time, however, researchers and their advocates in the Democratic caucus are taking increasingly aggressive stances of their own: Rather than answer GOP objections one by one, or brush them off, they’re making a larger issue of what they see as heavy-handed interference based on ideology rather than methodology.
Opponents in the scientific world and their political allies believe that, at its heart, the GOP assault isn’t about bringing greater accountability to the EPA or NSF, but rather a larger lack of trust in science that could soon spur efforts to micromanage NIH, the Department of Defense and other agencies that, all told, spend tens of billions on scientific research every year.
Researchers warn that funding only science that appears politically safe will stifle innovation and say that the agency actually does an impressive job of choosing which projects to fund.
But some in the research community say damage is already being done. Researchers will be less likely to apply for grants to fund unorthodox-sounding now — but potentially groundbreaking — research projects in future years, leaders of the Association of American Universities said recently in a statement.
Scientists and engineers, particularly young ones, should not be discouraged from pursuing unconventional, often groundbreaking scientific research.
More details here:
http://www.politico.com/story/2014/11/the-next-battle-in-the-war-on...
Nov 29, 2014
Dr. Krishna Kumari Challa
Nov 30, 2014
Dr. Krishna Kumari Challa
On the epoch of the Antikythera mechanism and its eclipse predictor
Scientists Have Made a Remarkable Discovery About the World's Oldest "Computer"
According to new research, the ancient Greek Antikythera Mechanism — sometimes called the world's "oldest analog computer" for its ability to predict lunar and solar eclipses and solar, lunar and planetary positions — may be much older than previously thought.
Based on recent analysis of the dials used to predict eclipses, Christián C. Carman, a science historian at the National University of Quilmes in Argentina, and James Evans, a physicist at the University of Puget Sound in Washington, have published new findings suggesting that the machine's dials actually start counting around 205 B.C., which would mean the device is 50 to 100 years older than researchers previously believed.
http://link.springer.com/article/10.1007/s00407-014-0145-5
Dec 2, 2014
Dr. Krishna Kumari Challa
Researchers observe evolution of life forms that bear hallmarks of multicellular organisms
n ground-breaking study a team of researchers has reported the real time evolution of life forms that have all the hallmarks of multicellular organisms.
The researchers from New Zealand, Germany and the USA at the Max Planck Institute for Evolutionary Biology have observed in real time the evolution of simple self-reproducing groups of cells from previously individual cells.
The nascent organisms are comprised of a single tissue dedicated to acquiring oxygen, but this tissue also generates cells that are the seeds of future generations: a reproductive division of labour.
Intriguingly, the cells that serve as a germ line were derived from cheating cells whose destructive effects were tamed by integration into a life cycle that allowed groups to reproduce.
The life cycle turned out to be a spectacular gift to evolution and rather than working directly on cells, evolution was able to work on a developmental programme that eventually merged cells into a single organism.
When this happened groups began to prosper with the once free-living cells coming to work for the good of the whole.
When single bacterial cells of Pseudomonas fluorescens are grown in unshaken test tubes the cellular collectives prosper because they form mats at the surface of liquids where the cells gain access to oxygen that is otherwise in the liquid unavailable.
Lead author Paul Rainey explained that simple cooperating groups, like the mats that interest people, stand as one possible origin of multicellular life, but no sooner do the mats arise, than they fail, which is the same process that ensures their success, natural selection, ensures their demise.
-journal Nature,
Dec 2, 2014
Dr. Krishna Kumari Challa
Brain Training Doesn’t Make You Smarter
Scientists doubt claims from brain training companies
http://www.scientificamerican.com/article/brain-training-doesn-t-ma...
Dec 3, 2014
Dr. Krishna Kumari Challa
Dynamic mechanical behavior of multilayer graphene via supersonic projectile penetration
A new study results suggest graphene may absorb 10 times the amount of energy steel can before failing. The bullet was propelled into stacked graphene sheets at supersonic speeds of up to 2000mph by the gases produced by laser pulses rapidly evaporating a gold film. The team calculated the energy difference of the bullet before and after to determine the energy absorbed.
Graphene was able to absorb up to 0.92MJ/kg of ballistic energy in the test, with cracks forming around the impact zone. By comparison, steel targets only absorbed up to 0.08MJ/kg at the same speed.
The trick lies in energy absorption. If you can nucleate many cracks, it is a way of spreading the impact into more material. It is similar to that of tempered safety glass, a material engineered to spread damage and not locate it to a point. Graphene’s high performance is down to its high stiffness and low density, both of which control the speed of sound in the material. The stiffer and lighter the material is, the faster sound, stress and energy can travel through it. If you are able to spread the energy at higher speeds across the target area, more of the material will support the load and reduce the damaging effect of the bullet. Graphene’s dynamic strength is significant as it may behave similarly to materials specifically engineered to stop bullets, such as Kevlar, a fabric composed of aromatic polyamide threads.
http://www.sciencemag.org/content/346/6213/1092
Dec 3, 2014
Dr. Krishna Kumari Challa
Dec 3, 2014
Dr. Krishna Kumari Challa
Dec 3, 2014
Dr. Krishna Kumari Challa
How Scientists Gained the Ability to Reverse Overdoses
Naloxone reverses the process by acting like a toddler grabbing for another child's toy, preventing death by shoving the opiate out of the way and binding to the receptor itself. This sends the user into immediate withdrawal. The side-effects – dizziness, nausea, shaking, sweating – are unpleasant but not overly dangerous. And if someone hasn't used any opioids, naloxone will have no effect, positive or negative.
http://gizmodo.com/how-scientists-gained-the-ability-to-reverse-ove...
Saved: How addicts gained the power to reverse overdoses
http://mosaicscience.com/story/saved-how-addicts-gained-power-rever...
Dec 4, 2014
Dr. Krishna Kumari Challa
Scientists push for 'scientific integrity' at bargaining table
Canada’s federal scientists are going to the bargaining table this week with an unprecedented package of contract changes to promote “scientific integrity” in government, including the right of scientists to speak freely and forbidding political interference in their work.
http://ottawacitizen.com/news/politics/scientists-push-for-scientif...
Dec 4, 2014
Dr. Krishna Kumari Challa
New HIV Mutations Welcome News for the Science Community
In a recent paper now published in Proceedings of the National Academy of Sciences, Oxford University researchers have found out that the virus is becoming weaker as patients have more access to antiretroviral drugs, some of which are really potent.
Furthermore, like most viruses, HIV mutates as well, going against the immunity of a patient. While this doesn't mean that the patient is already free of the virus, it means that its progression to AIDS is much slower.
http://www.youthhealthmag.com/articles/3804/20141202/hiv-antiretrov...
Dec 4, 2014
Dr. Krishna Kumari Challa
World-first artificial enzymes suggest life doesn't need DNA or RNA
For the first time, scientists have built artificial enzymes using lab-grown genetic material called XNA. The experiment bolsters the idea that life could evolve without what we thought to be the fundamental building blocks of life - DNA and RNA.
Scientists in the UK have created synthetic enzymes - vital catalysts needed to support life - from scratch, using genetic material created in the lab. These enzymes don’t contain DNA or RNA, they contain artificial XNA - xeno nucleic acid - and could be used to produce new medical treatments and find life on other planets.
Catalysts from synthetic genetic polymers
http://www.nature.com/nature/journal/vaop/ncurrent/full/nature13982...
Dec 4, 2014
Dr. Krishna Kumari Challa
Passive radiative cooling below ambient air temperature under direct sunlight
New material uses the cold darkness of the Universe to cool your house
New technology takes the heat from your house and beams it straight into outer space. And it’s so efficient it could replace air conditioning.
Engineers from Stanford University in the US have created a material that keeps your house cool by beaming heat back into the “cold darkness of the Universe”.
The material reflects sunlight, just like a regular mirror, but most importantly, it also beams heat from inside a building straight into outer space. This means that it lowers the temperature of anything that’s it’s placed on by up to five degrees, even if it’s sitting in direct sunlight - and all without electricity.
The material works using a phenomenon called radiative cooling, which is a way of passively transferring heat from one place to somewhere cooler. The phenomenon already happens all the time - our body emits heat into the cooler air around us, and if it’s cold outside, our house will lose heat to the atmosphere.
http://www.nature.com/nature/journal/v515/n7528/full/nature13883.html
Dec 5, 2014
Dr. Krishna Kumari Challa
Study proves we CAN see ‘invisible’ infrared light
Our basic human eyes, usually deprived of the majority of the wavelengths in the world, are actually capable of detecting infrared light, new research proves. We just need a rapidly-pulsing laser to beam it into our retinas.
Humans are notoriously limited when it comes to eyesight - while we can see all the beautiful colours of the rainbow within our visible spectrum, wavelengths such as X-rays, radio waves and infrared are all invisible to us.
But now scientists have proved that our retina cells can see infrared light waves after all, we just need them to hit our eyes in the right way. The research will now help scientists to better test people's eyesight and potentially even improve it.
The researchers, from Washington University School of Medicine in St Louis, tested cells from retinas of mice and humans using powerful lasers emitting pulses of infrared light. They found that when the light-sensing cells of retinas get a double hit of infrared energy, our eyes are able to detect light that falls outside our visible spectrum.
We're using what we learned in these experiments to try to develop a new tool that would allow physicians to not only examine the eye but also to stimulate specific parts of the retina to determine whether it's functioning properly," said senior researcher Vladimir J. Kefalov in a press release. "We hope that ultimately this discovery will have some very practical applications.
Human infrared vision is triggered by two-photon chromophore isomerization
http://www.pnas.org/content/early/2014/11/25/1410162111
Dec 5, 2014
Dr. Krishna Kumari Challa
Evidence of Polyethylene Biodegradation by Bacterial Strains from the Guts of Plastic-Eating Waxworms
Abstract: Polyethylene (PE) has been considered nonbiodegradable for decades. Although the biodegradation of PE by bacterial cultures has been occasionally described, valid evidence of PE biodegradation has remained limited in the literature. We found that waxworms, or Indian mealmoths (the larvae of Plodia interpunctella), were capable of chewing and eating PE films. Two bacterial strains capable of degrading PE were isolated from this worm’s gut, Enterobacter asburiae YT1 and Bacillus sp. YP1. Over a 28-day incubation period of the two strains on PE films, viable biofilms formed, and the PE films’ hydrophobicity decreased. Obvious damage, including pits and cavities (0.3–0.4 μm in depth), was observed on the surfaces of the PE films using scanning electron microscopy (SEM) and atomic force microscopy (AFM). The formation of carbonyl groups was verified using X-ray photoelectron spectroscopy (XPS) and microattenuated total reflectance/Fourier transform infrared (micro-ATR/FTIR) imaging microscope. Suspension cultures of YT1 and YP1 (108 cells/mL) were able to degrade approximately 6.1 ± 0.3% and 10.7 ± 0.2% of the PE films (100 mg), respectively, over a 60-day incubation period. The molecular weights of the residual PE films were lower, and the release of 12 water-soluble daughter products was also detected. The results demonstrated the presence of PE-degrading bacteria in the guts of waxworms and provided promising evidence for the biodegradation of PE in the environment.
http://pubs.acs.org/doi/abs/10.1021/es504038a?source=cen
Dec 6, 2014
Dr. Krishna Kumari Challa
New Twist Found in the Story of Life’s Start
All life on Earth is made of molecules that twist in the same direction. New research reveals that this may not always have been so.
http://www.quantamagazine.org/20141126-why-rna-is-right-handed/
Dec 6, 2014
Dr. Krishna Kumari Challa
Physicists achieve superconductivity at room temperature
German researchers have figured out how to put a piece of ceramic in a superconducting state at room temperature - no cooling required.
Physicists from the Max Planck Institute for the Structure and Dynamics of Matter have kept a piece of ceramic in a superconducting state, disproving the widely-held assumption that materials need to be cooled to temperatures of at least -140 degrees Celsius to achieve superconductivity.
Superconducting materials have the potential to change everything that relies on electrical power, such as power grids, transportation, and renewable energy sources. This is because they’re able to transport electric currents without any resistance, which means they’re incredibly efficient and cost-effective to run. Except right now, they’re not, because in order to get a material to a superconducting state, it needs to be cooled to near absolute zero temperatures, which has really hampered the potential of this technology up to this point.
Over the past few decades, scientists have come to realise that metals cooled to temperatures of around -273 degrees Celsius using liquid nitrogen or helium aren’t the only materials capable of reaching a superconducting state. During the 1980s, it was discovered that ceramic materials can reach this state at significantly higher (and yet still extremely cold) temperatures of around -200 degrees Celsius. This is why they’re called high-temperature superconductors.
One such ceramic material, called yttrium barium copper oxide (YBCO), has since been singled out, thanks to its great potential for use in a range of technical applications such as superconducting cables, electrical motors, and generators. Made from super-thin double layers of a copper oxide material stacked in-between layers made from barium, copper and oxygen, this material is designed to allow the bonding of electrons into what’s known as Cooper pairs.
These Cooper pairs of electrons are able to ‘tunnel’ between the alternating layers "like ghosts can pass through walls, figuratively speaking - a typical quantum effect,” they report, but it was thought this could only occur at super-cooled temperatures.
But then the physicists from Max Planck decided to see what would happen if they irradiated the YBCO ceramic material with infrared laser pulses. They found that for a fraction of a second, the ceramic becomes superconducting at room temperature. And when we say “a fraction of a second”, they mean a fraction. “It was only a few millionths of a millisecond” . "That's a very, very brief lifespan for our amazing new room temperature superconductor. However, the successful experiment is proof that such a thing is possible."
http://phys.org/news/2014-12-superconductivity-cooling.html
Dec 7, 2014
Dr. Krishna Kumari Challa
Dec 7, 2014
Dr. Krishna Kumari Challa
Dec 7, 2014
Dr. Krishna Kumari Challa
Dec 8, 2014
Dr. Krishna Kumari Challa
Vaccine myths - busted:
16 Years Ago, A Doctor Published A Study. It Was Completely Made Up, And It Made Us All Sicker.
Once upon a time, a scientist named Dr. Andrew Wakefield published in the medical journal The Lancet that he had discovered a link between autism and vaccines.
After years of controversy and making parents mistrust vaccines, along with collecting $674,000 from lawyers who would benefit from suing vaccine makers, it was discovered he had made the whole thing up. The Lancet publicly apologized and reported that further investigation led to the discovery that he had fabricated everything.
In the intervening years, millions have been spent on studying this further to see if there was anything that could connect autism and vaccines.
Read scientific facts about vaccines here:
http://www.upworthy.com/16-years-ago-a-doctor-published-a-study-it-...
Dec 8, 2014
Dr. Krishna Kumari Challa
Magnet Design by Integration of Layer and Chain Magnetic Systems in a π-Stacked Pillared Layer Framework
http://onlinelibrary.wiley.com/doi/10.1002/anie.201410057/abstract;...
Dec 10, 2014
Dr. Krishna Kumari Challa
New drug eliminates the malaria parasite within 48 hours in mice
A promising new compound tricks the immune system into destroying red blood cells infected with the malaria parasite in just two days. Trials are now planned in humans.
An international team of scientists has developed an anti-malarial compound that triggers the immune system to destroy red blood cells infected by malaria, but leaves healthy cells unharmed.
The compound, known as (+)-SJ733, has already been tested in mice, and a single dose has been shown to kill 80 percent of malaria parasites in the bloodstream within 24 hours. Within 48 hours the parasite was completely undetectable.
http://www.sciencedaily.com/releases/2014/12/141205175027.htm
Dec 10, 2014
Dr. Krishna Kumari Challa
In 1911, Albert Einstein Told Marie Curie To Ignore The Trolls!
A letter addressed from Einstein to famed physicist, chemist, and two-time Nobel-Laureate, Marie Curie tells her to ignore the trolls.
Read it here:
http://einsteinpapers.press.princeton.edu/vol8-trans/34
And his reply to a female fan:
Albert Einstein's Reply to a Female Fan's Confession Should Be in Every Science Textbook
when she said: "I hope you will not think any the less of me for being a girl!"
"I hope you will not think any the less of me for being a girl!"
This plea was sent to Albert Einstein by a young South African in the 1940s, and was recently unearthed as part of Alice Caprice's Dear Professor Einstein: Albert Einstein's Letters to and from Chil.... Although brief, Tyfanny's words capture the self-consciousness and self-doubt that have for so long plagued women who aspire to careers in science and technology.
In the letter, dated Sept. 19, 1946, a seemingly agonized Tyfanny admits to Einstein that she has left out a potentially damaging detail about herself. "I forgot to tell you, in my last letter, that I was a girl. I mean I am a girl," the young scientist writes. "I have always regretted this a great deal, but by now I have become more or less resigned to the fact."
The physicist's pithy response is a timeless lesson that bears repeating, all these decades later. "I do not mind that you are a girl, but the main thing is that you yourself do not mind," the Nobel Prize winner replied. "There is no reason for it."Dec 10, 2014
Dr. Krishna Kumari Challa
Cancer biology reproducibility effort
eLife has published the first papers from the Reproducibility Project: Cancer Biology.
First announced in October 2013 with $1.3 million in funding from the Laura and John Arnold Foundation, The Reproducibility Project: Cancer Biology (RP:CB) aims to replicate key experimental findings in 50 high-profile cancer biology papers published between 2010 and 2012. The project is a partnership between the Center for Open Science, Science Exchange, and eLife.
Following an earlier effort by the Center for Open Science, in psychology research, the outputs of the cancer biology project are being published in two distinct phases. The first phase involves the production of a Registered Report – a novel publishing format that sets out how the replications will be performed, the reagents and protocols, the sample sizes, and the planned analyses. The replications will be performed by laboratories that are part of the Science Exchange network. The second phase is the publication of these results in a Replication Study. Both the Registered Report and the Replication Study are subject to eLife’s rigorous and consultative peer review process.
An open investigation of the reproducibility of cancer biology rese...
Find out more details here: http://elifesciences.org/collections/reproducibility-project-cancer...
Dec 11, 2014
Dr. Krishna Kumari Challa
Cilia and Diseases
In recent decades, cilia have moved from relative obscurity to a position of importance for understanding multiple complex human diseases. Now termed the ciliopathies, these diseases inflict devastating effects on millions of people worldwide. In this review, written primarily for teachers and students who may not yet be aware of the recent exciting developments in this field, we provide a general overview of our current understanding of cilia and human disease. We start with an introduction to cilia structure and assembly and indicate where they are found in the human body. We then discuss the clinical features of selected ciliopathies, with an emphasis on primary ciliary dyskinesia, polycystic kidney disease, and retinal degeneration. The history of ciliopathy research involves a fascinating interplay between basic and clinical sciences, highlighted in a timeline. Finally, we summarize the relative strengths of individual model organisms for ciliopathy research; many of these are suitable for classroom use.
http://bioscience.oxfordjournals.org/content/64/12/1126
http://www.scientificamerican.com/article/why-scientists-are-blamin...
Dec 11, 2014
Dr. Krishna Kumari Challa
Even in Our Digital Age, Early Parental Writing Support Is Key to Children's Literacy
A new Tel Aviv University study says that preschoolers should be encouraged to write at a young age — even before they make their first step into a classroom.
A new study published in the Early Childhood Research Quarterly explains why early writing, preceding any formal education, plays an instrumental role in improving a child's literacy level, vocabulary, and fine motor skills. The research, conducted by Prof. Dorit Aram of TAU's Jaime and Joan Constantiner School of Education in collaboration with Prof. Samantha W. Bindman of the University of Illinois at Urbana-Champaign and other colleagues in the US, assessed the merits of early parental mediation of children's literacy and language in English, and recommended useful techniques to that end.
http://www.sciguru.org/newsitem/18089/even-our-digital-age-early-pa...
Dec 11, 2014
Dr. Krishna Kumari Challa
A flock of genomes
http://www.sciencemag.org/content/346/6215/1308
A remarkable international effort to map out the avian tree of life has revealed how birds evolved after the mass extinction that wiped out the dinosaurs into more than 10,000 species alive today. More than 200 scientists in 20 countries joined forces to create the evolutionary tree, which reveals how birds gained their colourful feathers, lost their teeth, and learned to sing songs.
The project has thrown up extraordinary similarities between the brain circuits that allow humans to speak and those that give some birds song: a case of common biology being arrived at via different evolutionary routes.
Members of the project, named the Avian Phylogenomics Consortium, published the family tree and their analysis on Thursday in eight main papers in the journal Science, and in more than 20 others in different scientific journals.
Dec 12, 2014
Dr. Krishna Kumari Challa
Scientists crack stem cell reprogramming code
A Canadian-led international team of researchers has begun solving the mystery of just how a specialized cell taken from a person’s skin is reprogrammed into an embryonic-like stem cell, from which virtually any other cell type in the body can be generated.
The research is being touted as a breakthrough in regenerative medicine that will allow scientists to one day harness stem cells to treat or even cure a host of conditions, from blindness and Parkinson’s disease to diabetes and spinal cord injuries.
Besides creating the reprogramming roadmap, the scientists also identified a new type of stem cell, called an F-class stem cell due to its fuzzy appearance. Their work is detailed in five papers published on 10th Dec., 2014 in the prestigious journals Nature and Nature Communications.
Dec 12, 2014
Dr. Krishna Kumari Challa
Rosetta's new light on Cometary Origins of Earth’s Oceans
The provenance of water and organic compounds on the Earth and other terrestrial planets has been discussed for a long time without reaching a consensus. One of the best means to distinguish between different scenarios is by determining the D/H ratios in the reservoirs for comets and the Earth’s oceans. Here we report the direct in situ measurement of the D/H ratio in the Jupiter family comet 67P/Churyumov-Gerasimenko by the ROSINA mass spectrometer aboard ESA’s Rosetta spacecraft, which is found to be (5.3 ± 0.7) × 10−4, that is, ~3 times the terrestrial value. Previous cometary measurements and our new finding suggest a wide range of D/H ratios in the water within Jupiter family objects and preclude the idea that this reservoir is solely composed of Earth ocean-like water.
http://www.sciencemag.org/content/early/2014/12/09/science.1261952
In the case of Earth’s oceans, it may not be either comets or asteroids that delivered them, but rather a significant mixture of both.
But the results form Rosetta show comets are not likely to have come through asteroid collisions. The water on Earth has a particular ratio of molecular isotopes - normal water and heavy water - and the water found on 67P has a ratio three times greater. This almost certainly rules out comets as source of earth's water.
Rosetta casts doubt on comets as Earth’s water providers
Comet 67P’s atmosphere contains a surprisingly high fraction of deuterium
https://www.sciencenews.org/article/rosetta-casts-doubt-comets-eart...
Dec 12, 2014
Dr. Krishna Kumari Challa
Dec 12, 2014
Dr. Krishna Kumari Challa
Researchers use real data rather than theory to measure the cosmos
For the first time researchers have measured large distances in the Universe using data, rather than calculations related to general relativity.
A research team from Imperial College London and the University of Barcelona has used data from astronomical surveys to measure a standard distance that is central to our understanding of the expansion of the universe.
-Imperial College London
Dec 14, 2014
Dr. Krishna Kumari Challa
Seven mind-scrambling science ideas only geniuses can understand
https://metro.co.uk/2014/12/13/seven-mind-scrambling-science-ideas-...
Dec 14, 2014
Dr. Krishna Kumari Challa
Invisible 'pain beam' to disperse crowds during disturbances
A long range and non-lethal 'pain beam' weapon that can be used to break up riots or protests from a distance. The Poly WB-1, which was unveiled at an air show in China, uses a millimetre-wave beam that can travel distances of up to one kilometre. When the beam reaches a person, it heats water molecules just below the skin, causing intense pain. While a short burst with the pain beam will cause a human to recoil in pain, longer bursts at certain frequencies will cause the flesh to burn and blister.
The system is very similar to the Active Denial System created by Raytheon, which was sent to Afghanistan but not used in combat due to fears it would fuel enemy propaganda and because it used so much power and took too much time to boot up. In tests of that system, most humans reach their pain threshold within three seconds, and none could withstand longer than five seconds. "For the first millisecond, it just felt like the skin was warming up. Then it got warmer and warmer and you felt like it was on fire ... As soon as you're away from that beam your skin returns to normal and there is no pain," said a spokesman from the Air Force research lab that made the system.
China is developing the weapon for naval the weapon for naval applications to help deal with con frontation in non-lethal ways. There are a number of territorial disputes in the South China and East China seas, involving various islands and boundaries. At the moment, the weapon needs to be attached to a large truck - so no non-lethal ray guns quite yet.
Dec 14, 2014
Dr. Krishna Kumari Challa
'Men Are Idiots,' Says Study In Prestigious Medical Journal
http://www.businessinsider.in/Men-Are-Idiots-Says-Study-In-Prestigi...
Dec 14, 2014