Al Mal de Alzheimer lo han vinculado en muchos estudios a la acumulación de placas amiloides en el cerebro. Sin embargo, una nueva investigación indica que hay un vínculo entre el problema de las placas amiloides y niveles bajos de energía, o de metabolismo, en neuronas de ciertas áreas del......

Se ha logrado determinar la función exacta de un importante factor de crecimiento, presente en pequeñas cantidades en algunas células humanas, que ayuda a formar folículos pilosos y a regenerarlos durante el proceso de cicatrización de la piel.Este factor de crecimiento, Fgf9, inicialmente es......

Matías se asoma por la ventana y observa. Gira y dispara la pregunta: “¿Y el sol?”. “Se fue a dormir”, contesta su mamá pensando una explicación que satisfaga la curiosidad de sus tres años. “Hizo noche”, dice a medio camino entre la afirmación y la pregunta, y vuelve a interrogar mirando al... Fuente :...

La población actual de lince ibérico en libertad se estima entre 250 y 300 individuos y está distribuida en dos grupos diferentes de la zona suroeste de la península ibérica, donde se concentran los esfuerzos para conservar la especie.Ahora, un estudio internacional publicado en la revista Nature... Fuente :...

Investigadores de la Universidad de St. Andrews, en Escocia, han realizado un estudio a lo largo de nueve años con delfines nariz de botella (Tursiops truncatus), que da nuevas pistas sobre el complejo sistema de comunicación de estos mamíferos marinos.Los científicos han mostrado que estos......

Artículo, del blog Ser Vivo, que recomendamos por su interés.  Se ha publicado recientemente el éxito de las pruebas en ratones de un fármaco preventivo del estrés postraumático. La idea es que si finalmente resulta factible su uso en humanos podrá ser administrado al personal destinado a......

Athletes seeking a healthy performance weight should eat high fiber, low-fat food balanced with their training regimen in order to maintain muscle while still burning fat, according to a report by an Oregon State University researcher. Fuente : http://www.eurekalert.org/pub_releases/2013-07/osu...

A multidisciplinary team at UT Southwestern Medical Center has found that measuring the oxygenation of tumors can be a valuable tool in guiding radiation therapy, opening the door for personalized therapies that keep tumors in check with oxygen enhancement. Fuente : http://www.eurekalert.org/pub_releases/2013-07/usm...

Researchers at Brown University have shown that some Martian valleys appear to have been caused by runoff from orographic precipitation -- moisture carried part of the way up a mountain and deposited on the slopes. The findings help to answer the question of whether water flowing on ancient Mars bubbled up from the ground or...

Scientists at Chicago's Field Museum and international collaborators have described a new species of Hero Shrew -- the mammal with the most bizarre lower spine on Earth. Fuente : http://www.eurekalert.org/pub_releases/2013-07/fm-...

People are more likely to try to break up a bar fight when they believe the conflict is too violent, or has the potential to become more violent, according to an international team of researchers. Fuente : http://www.eurekalert.org/pub_releases/2013-07/ps-...

Ultrasonic waves can find bubbles and cracks in adhesive bonds holding airplane composite parts together, and now aerospace engineers can select the best frequencies to detect adhesive failures in hard-to-reach places more quickly, thanks to Penn State researchers. Fuente : http://www.eurekalert.org/pub_releases/2013-07/ps-...

In a first-of-its-kind clinical trial, physician-scientists at University Hospitals Case Medical Center found that sleep quality impacts skin function and aging. The recently completed study, commissioned by Estée Lauder, demonstrated that poor sleepers had increased signs of skin aging and slower recovery from a variety of...

A nursing researcher at the University of Missouri has developed a peer-led intervention that helps individuals with HIV adhere to their treatment plans that can improve their quality of life. Fuente : http://www.eurekalert.org/pub_releases/2013-07/uom...

CU Cancer Center and CSU Flint Animal Cancer Center study shows NOTCH signaling was elevated in K9 osteosarcoma, but aspects of Notch signaling were noticeably deactivated in the worst cancers. Fuente : http://www.eurekalert.org/pub_releases/2013-07/uoc...

Scientists from The University of Manchester have revealed new images which provide the clearest picture yet of how white blood immune cells attack viral infections and tumors. They show how the cells, which are responsible for fighting infections and cancer in the human body, change the organization of their surface molecules,...

Color and black-and-white images of Earth taken by two NASA interplanetary spacecraft on July 19 show our planet and its moon as bright beacons from millions of miles away in space. NASA's Cassini spacecraft captured the color images of Earth and the moon from its perch in the Saturn system nearly 900 million miles (1.5 billion...

Neuroinformatics researchers have demonstrated how complex cognitive abilities can be incorporated into electronic systems made with so-called neuromorphic chips: They show how to assemble and configure these electronic systems to function in a way similar to an actual brain. Fuente :...

Climate data can help predict some crop failures several months before harvest, according to a new study from an international team. Scientists found that in about one-third of global cropland, temperature and soil moisture have strong relationships to the yield of wheat and rice at harvest. For those two key crops, a computer...

Un estudio comprueba que los delfines responden cuando escuchan su propio silbido, un sonido que les identifica dentro del grupo y que funciona como su nombre ||| Fuente : http://feedproxy.google.com/~r/materia/noticias/~3...

Un equipo de  investigadores escoceses ha demostrado que los delfines nariz de botella son capaces de dirigirse unos a otros por su nombre. Según los científicos, cada uno de estos delfines emite un silbido que es su seña de identidad y los demás son capaces de copiar ese sonido específico y...

Conventional scientific wisdom has it that plants and other creatures have only lived on land for about 500 million years, but a new study is pointing to evidence for life on land that is four times as old -- at 2.2 billion years ago and almost half way back to the inception of the planet. Fuente :...

For the first time, scientists have direct geochemical evidence that the 150-mile long Tsangpo Gorge, possibly the world's deepest, was the conduit by which megafloods from glacial lakes, perhaps half the volume of Lake Erie, drained catastrophically through the Himalayas when their ice dams failed during the last 2 million...

In events that could exacerbate sea level rise over the coming decades, stretches of ice on the coasts of Antarctica and Greenland are at risk of rapidly cracking apart and falling into the ocean, according to new iceberg calving simulations. Fuente : http://feeds.sciencedaily.com/~r/sciencedaily/~3/3...

A prominent sports medicine physician has some blunt advice for parents of high school athletes who want to play football this fall: Don't let them do it. Fuente : http://feeds.sciencedaily.com/~r/sciencedaily/~3/O...

How a group of animals can abandon sex, yet produce more than 460 species over evolutionary time, became a little less mysterious this week with the publication of the complete genome of a bdelloid rotifer (Adineta vaga). Fuente : http://feeds.sciencedaily.com/~r/sciencedaily/~3/9...

A new finding provides fresh hope for the millions of women worldwide with estrogen receptor positive breast cancer. Scientists have shown that a specific change, which occurs when tumors become resistant to anti-estrogen therapy, might make the cancers susceptible to treatment with chemotherapy drugs. Fuente :...

Young harp seals off the eastern coast of Canada are at much higher risk of getting stranded than adult seals because of shrinking sea ice cover caused by recent warming in the North Atlantic, according to a Duke University study. Fuente : http://feeds.sciencedaily.com/~r/sciencedaily/~3/2...

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