An international team of scientists has identified a genomic variant strongly associated with an increased sensitivity to the sun than usual, and with freckles, brown hair and blue eyes.
The team of Andy McCallion, Johns Hopkins University in Baltimore, Maryland, USA, and contributor to the National Human Genome Research Institute (NHGRI), one of the U.S. National Institutes of Health (NIH) has discovered an intricate pathway involved in the non-coding region of a gene which is between a few dozen genes associated with traits of human pigmentation.
The researchers analyzed data from a population study in Iceland, in which hundreds of thousands of common differences between individuals in their DNA were compared, in order to see if some of these variants were associated with specific traits of interest. McCallion and his colleagues initially focused on 2,230 Icelanders and the IRF4 gene, which before had already been associated with immunity. Read the rest of this entry »
Global warming is influencing countless ecological issues, some important, others less so, but they all indicative of what the new world to which we must adapt. Changes in developmental timing and vital habits of animals living in the wild are an example, which is well illustrated by the results of a new study conducted by the team of Heather Kharouba, University of British Columbia in Canada, and is now in California at Davis, United States.
It is well known that butterflies in certain areas of the world, like other animals, are much more active from spring to fall during the winter.
A comprehensive compilation of data collected in collections of more than 200 species of butterflies preserved in Canadian museums, and further analysis and comparison with corresponding current copies of the same species data has allowed the research team to detect significant changes in the annual calendar of these animals in the last 130 years. Read the rest of this entry »
Researchers have created the first battery electrode able to repair itself, thus opening a promising path towards the development of a new generation of batteries commercially viable electric car lithium-ion batteries, mobile phones and other devices.
The secret is an elastic polymer coating electrode, the subject remains in one piece and spontaneously repair small cracks generated on the electrode during battery operation. This unique polymer is developed by Chao Wang of the Stanford University in California, United States, in the lab that the chemical engineer Zhenan Bao directs at the University.
The investigation now by Wang, Bao and colleagues at that university and SLAC National Accelerator Laboratory in Menlo Park, California, has shown that silicon electrodes tested in experiments lasting 10 times longer when they were coated with the Self Repair polymer which any crack repaired in a few hours. Read the rest of this entry »
An international study, which involved researchers from the CSIC (Spain), has found that the magnesium alloy with small amounts of arsenic decreases and slows the corrosion process of the material.
The results of the study, published in the journal Electrochemistry Communications, could have applications in the automotive industry and electronics. During the study, researchers tested more than 400 different combinations of alloying elements to try to find ways to reduce the susceptibility of magnesium corrosion. Read the rest of this entry »
Leveraging small “defects” or special anomalies in nanodiamonds, researchers have achieved sufficient magnetic moment inherent consistency of these defects, and to exploit its potential as quantum sensors for high precision and also biocompatible.
In that sense, the nanodiamonds potentially provide an extraordinarily precise resolution and biocompatibility, and which can be inserted into many living cells.
Through close observation of the dynamics of spin in the nitrogen-vacancy nanodiamond centers, equipment Mete Atature, Helena Knowles and Dhiren Kara, the Cavendish Laboratory, part of the University of Cambridge in the UK, has now got to determine which is the concentration of nitrogen impurities which decisively acting on the coherence, and non spin interactions in the crystal surface. Read the rest of this entry »
It has been verified that it is feasible to implant under the skin sensors based on carbon nanotubes to detect nitric and able to stay there for more than year rust.
Nitric oxide is one of the most important signaling substances living cells, carrying messages within the brain and coordinating functions of the immune system. In many cancer cells, their levels are abnormal.
The research and development work conducted by the team of Michael Strano and Nicole Iverson, of the Massachusetts Institute of Technology (MIT) in Cambridge, United States, offers a new way of measuring nitric oxide, and potentially other substances, in the interior of the body and in real time. Read the rest of this entry »
The brains of men and women are not structured in the same way, at least in terms of the connections between the hemispheres. U.S. scientists have analyzed the neural circuits of about a thousand men and women, from infancy to adulthood.
The study, published in the journal PNAS, notes that the patterns of brain connectivity men make a more efficient system for coordinated actions and perceptions. By contrast, in the female brain, connections favor analytical reasoning, information processing and intuition.
“It’s a unique view of gender differences across brain connectivity,” say the researchers in their paper. Our findings support the theory that the behavior has a neuronal substrate and our study could improve their understanding,” stand out. Read the rest of this entry »
Cancer patients are likely to recover if the tumors are completely eliminated. However, the edges of a malignant tumor are often mixed with the surrounding healthy tissue, and it is difficult for surgeons to recognize and remove small clusters of cancer cells.
A new and portentous camera, developed by scientists at the Fraunhofer-Institute for Manufacturing Engineering and Automation (IPA) in Germany, becomes visible to the “hidden” tumors during surgery.
Until now, practitioners have relied exclusively on their trained eye when to remove peripheral portions of sets of tumor tissue. Read the rest of this entry »
The revolutionary new Internet architecture is being designed to replace the current one includes such radicals as drastically reduce the need for the surfer-server connections and promote more efficient data distribution changes, following an approach not unlike that of P2P networks.
Are already taking the first steps toward this new architecture for internet, allowing, if expectations are met, to increase the speed and network security.
A prototype of the new architecture, which has been developed as part of a project called “Pursuit”, funded by the European Union, is now beginning to be tested. Read the rest of this entry »
Penguins have a clumsy gait and ungainly so much that people find quite comical. However, when the penguins dive in the water go to navigate it with such precision and speed, described them as underwater rockets.
This amazing ability of penguins has been admired for years by Flavio Noca, professor of aerodynamics at the University of Applied Sciences Western Switzerland (Hepia) in Geneva and the Swiss Federal Institute of Technology (EPFL) in Zurich (also known as ETH Zurich).
Finally, Noca and colleagues have been inspired by the ability of penguins move as “rocket” to create a new technology of underwater locomotion characterized by high maneuverability and high hydrodynamic efficiency. Read the rest of this entry »