Gravedad de la NASA Probe B (GP-B) La misión ha confirmado dos predicciones fundamentales derivadas de la teoría general de Albert Einstein de la relatividad, que fue diseñado para probar la nave. El experimento, iniciado en 2004, utilizó cuatro giroscopios ultra-precisos para medir el efecto de la hipótesis de geodésica, la curvatura del espacio y [...]

Mosquitoes – not as suspected bird – could have played a major role in spreading West Nile virus westward across the United States, according to a study by researchers at the Johns Hopkins Bloomberg School of Public Health. The study is among the first to examine the role of mosquitoes in the spread of West [...]

Math-based computer models are a powerful tool to discover the details of complex living systems. John Tyson, a professor of biology at Virginia Tech, is the creation of such models to discover how cells process information and make decisions. “Cells receive information in the form of chemical signals, physical attachment to other cells, or radiation [...]

A rare, old polar bear fossil discovered in Norway in 2004 is to obtain a wealth of essential information about the age and evolutionary origin of the species whose future is now seen as synonymous with the devastation caused by climate change. An article in the current edition of the Proceedings of the National Academy [...]

Atrazine, one of the most widely used pesticides in the world, wreaking havoc with the sex lives of adult male frogs, three quarters maul them and becoming one of 10 women, according to a new study from the University of California, Berkeley biologists. The 75 percent that are chemically castrated are essentially “dead” due to [...]

An asteroid could not only explain the disappearance of the oceans and land life 65 million years, but towards the fireball and the resulting dust, darkness and toxic metal contamination can explain the geographic differences of extinction and recovery, according to Penn State geoscientist. “Our results shed light on the causes of extinction nanoplankton, how [...]

Scientists have discovered how oxygen leaves green algal hydrogen production. The findings could help people who work toward “H2 solar farms in which microorganisms produce hydrogen fuel from sunlight and water. An international team of scientists from Oxford University and universities in Germany, report their findings in two articles, one in the JACS and one [...]

Bottles, glasses, and hot dishes may soon be a thing of the past in medicinal chemistry laboratories. Instead of handling a few experiments at a desk, scientists can only blow a microchip in a computer and instantly run thousands of chemical reactions, with results – literally shrinking the laboratory to the size of a fingernail. [...]

Antibiotic resistance has been a major problem for hospitals and health centers for over a decade. But despite the need for new treatment options, there have been only two new classes of antibiotics developed in the last 40 years. Now, a promising discovery by researchers at McMaster University, has revealed an ideal starting point for [...]

Physicists at UC San Diego have created a successful rapid integration of circuits particles called “excitons” commercially operating in cold temperatures, so the possibility of a new type of extremely fast computer based on excitons closer to reality. Their discovery, detailed this week in the advance online edition of the journal Nature Photonics, following the [...]

A team of researchers at the University of Zaragoza (UNIZAR, Spain) and the Institut d’Astrophysique Spatiale (IAS, France) has developed a brilliant bolometer, a device that scientists use in efforts to detect dark matter of the universe, and has been tested in the Underground Laboratory Canfranc in Huesca, Spain. “One of the biggest challenges in [...]

Catalysts for converting chemicals useless or unwanted in the most useful or desirable. Science research this week reveals important details about a common catalyst: how rafts form chemically reactive platinum in the catalyst. New ideas works in yields of how to improve the industrial catalyst for petroleum refining, chemical processing and environmental applications. The study [...]

Researchers at UC Irvine has created a new approach that greatly improves the targeting of chemotherapeutic drugs in specific cells and organs. Kenneth Longmuir, associate professor of physiology and biophysics, and Richard Robertson, professor of Anatomy and Neurobiology, using liposomes, small areas (less than 100 nanometers in diameter) of natural molecules of lipids, such as [...]

In areas where malaria mosquitoes have become resistant to chemical pesticides, fungi kill mosquitoes can be an effective tool. Fungal spores can indeed infect and kill malaria mosquitoes, including those that are resistant to pesticides. Moreover, the mosquitoes become more susceptible to pesticides, such as increases in fungal infection. Researchers from Wageningen University and colleagues [...]

Researchers from Northwestern University and Boise State University have discovered how to produce a less expensive way to change “memory foam, which could lead to wider applications of the subject, as in the surgical placement tools and mechanisms of the valve. David Dunand, James N. The and Mary M. Krebs, professor of Materials Science and [...]

One of the most popular episodes of the 8000 year history of grape cultivation led to biological changes that are not well understood – until now. Through biomolecular research work, German researchers have discovered new details about the legacy of Vitis varieties in cultivation today. In the process, which has opened the way for more [...]

The underwater observatory is the first to show live images online. It’s getting into position 30m under the sea in western Sweden, scientists are studying the scavengers that feed on the whale carcass. Scientists, including the Natural History Museum, have developed underwater observatory in the world, first went online. Scientists, including the Natural History Museum, [...]

Scientists have shown that the main stem, dominates the growth of the plant, mainly because it was there first, and not because of its position at the top of the plant. Teams of collaborators from the University of York in the UK and the University of Calgary, Canada combined their expertise in molecular genetics and [...]

After decades of debate and four years of research by an international body of earth scientists has formally agreed to move the date for the prehistoric era of glaciation 800,000 years, reports the Journal of Quaternary Science. The decision has been made by the International Commission on Stratigraphy (ICS), the authority of geological science has [...]

Like a giant wave in a sea of gaseous calcium atoms, the Bose-Einstein condensate rises. It consists of approx. 20 000 atoms that are not normally visible to the human eye. However, the waves describing the quantum mechanics of atoms, all oscillate synchronously in the condensate and accumulate to form a dense tidal wave. Thus, [...]

A nitrogen vacancy (small circles) within a diamond crystal is promising as a little ‘for quantum computers, in part due to its high sensitivity to magnetic fields, a sensibility that could also allow the RM-like studies objects as small as individual molecules or living cells. When the green light hits the nitrogen vacancy, which emits [...]

Mathematicians in North America, Europe, Australia and South America have resolved the first cases of a trillion old math problem. This was achieved thanks to an ingenious technique for multiplying large numbers. The number of cases is so enormous that if their numbers were written by hand that would stretch to the moon and back. [...]

A fiber optic sensor developed by a team of researchers at Purdue University, which is capable of measuring oxygen consumption rates could have broad applications ranging from development of plants from roots to the evaluation of drug efficacy chemotherapy. Optrode self-reference, developed in the laboratory of Marshall Porterfield, associate professor of agricultural and biological engineering, [...]