One of the major obstacles to growing new organs -- replacement hearts, lungs and kidneys -- is the difficulty researchers face in building blood vessels that keep the tissues alive, but new findings could help overcome this roadblock. Fuente : http://feeds.sciencedaily.com/~r/sciencedaily/~3/h...

Researchers have combined a range of advanced techniques that enable them to identify which neurons communicate with each other at different times in the rat brain, and in doing so, create the animal's sense of location. Fuente : http://feeds.sciencedaily.com/~r/sciencedaily/~3/w...

Scientists have illuminated the mechanism at the heart of one of the most useful processes in modern chemistry. A reaction that is robust and easy to perform, it is widely employed to synthesize new pharmaceuticals, biological probes, new materials and other products. Fuente :...

Pigments found in plants and purple bacteria employed to provide protection from sun damage do more than just that. Researchers have found that they also help to harvest light energy during photosynthesis. Carotenoids, the same pigments which give orange color to carrots and red to tomatoes, are...

A custom-built programmable 3-D printer can create materials with several of the properties of living tissues, scientists have demonstrated. Fuente : http://feeds.sciencedaily.com/~r/sciencedaily/~3/q...

¿Es posible revivir especies desaparecidas? ¿Qué impide recuperar al bucardo, al mamut lanudo o al tigre de Tasmania? Los expertos señalan los problemas tecnológicos, legales, prácticos y éticos con los que se topan todos estos proyectos ||| Fuente :...

Un equipo europeo, con participación de la Universidad Pompeu Fabra, ha detectado que las áreas cerebrales asociadas al control motor se activan cuando se ‘juega’ con el sistema de rehabilitación virtual RGS de pacientes con lesiones cerebrovasculares. Una técnica de resonancia magnética permite visualizar las imágenes. Fuente...

La nueva Lista de las aves de España, elaborada por SEO/BirdLife, alcanza ya las 569 especies y supera al anterior catálogo de 2005 con 56 nuevas incorporaciones. El 36% de las especies no están presentes de manera habitual, sino que se encuentran en ocasionalmente en zonas determinadas. Fuente :...

En un estudio realizado con el equipo femenino del Athletic, investigadores de la Universidad del País Vasco analizan cómo cambia su cuerpo y su rendimiento durante la temporada. Los expertos han comprobado que jugar partidos oficiales es un impulso importante para mejorar el rendimiento físico. Fuente :...

Un nuevo estudio revela una forma de 'engañar' a las bacterias responsables de enfermedades como la tuberculosis y la úlcera gástrica y duodenal  que consiste en evitar el normal funcionamiento de una de las enzimas que necesitan para sobrevivir. Este método impide la producción de nutrientes esenciales para la vida de la...

TieTop, fabricante del primer protector de corbatas de un sólo uso, biodegradable y personalizable, ha conseguido una campaña de promoción a través de Internet al ser la más votada en el concurso Las pequeñas se lo están currando. La iniciativa ha sido impulsada por la Fundación Española para la Ciencia y la Tecnología (FECYT)....

Un equipo del Centro Nacional de Investigación sobre la Evolución Humana (Cenieh) ha encontrado las primeras evidencias de uso de herramientas de piedra por parte de homínidos para extraer la carne animal de los huesos, tal y como lo realizan los carniceros actuales. El hallazgo se ha producido en el yacimiento más antiguo del...

A new study from the University of Missouri has measured the nerves responsible for the super-sensitive skin on a crocodile's face, which will help biologists understand how today's animals, as well as dinosaurs and crocodiles that lived millions of years ago, interact with the environment around them. Fuente :...

Gordon, the unique supercomputer launched last year by the San Diego Supercomputer Center at the University of California, San Diego, recently completed its most data-intensive task so far: Rapidly processing raw data from almost one billion particle collisions as part of a project to help define the future research agenda for...

Some thirty million years ago, Ganges river dolphins diverged from other toothed whales, making them one of the oldest species of aquatic mammals that use echolocation, or biosonar, to navigate and find food. This also makes them ideal subjects for scientists working to understand the evolution of echolocation among toothed...

One of the major obstacles to growing new organs -- replacement hearts, lungs and kidneys -- is the difficulty researchers face in building blood vessels that keep the tissues alive, but new findings from the University of Michigan could help overcome this roadblock. Fuente : http://www.eurekalert.org/pub_releases/2013-04/uom...

Jupiter's moon Io is the most volcanically active world in the Solar System, with hundreds of volcanoes, some erupting lava fountains up to 250 miles high. However, concentrations of volcanic activity are significantly displaced from where they are expected to be based on models that predict how...

Only half of people with arthritis who had a hip or knee replacement reported a significant improvement in pain and mobility after surgery, according to a new study led by Women's College Hospital and the Institute for Clinical and Evaluative Sciences. Fuente :...

Mothers suffering from postpartum depression after a high-risk pregnancy would turn to online interventions if available anonymously and from professional healthcare providers, according to researchers from Case Western Reserve University's Frances Payne Bolton School of Nursing and College of Arts and Sciences. Fuente :...

Astronomers using the Atacama Large Millimeter/submillimeter Array telescope have discovered signs of star formation perilously close to the supermassive black hole at the center of the Milky Way Galaxy. If confirmed, this would be the first time that star formation was observed so close to the galactic center. Fuente :...

Osmosis -- the flow of a solvent across a semipermeable membrane from a region of lower to higher solute concentration -- is a well-developed concept in physics and biophysics. The problem is that even though the concept is important to plant and human physiology, osmosis is understood in biology and chemistry in a much simpler...

Observing the evolution of a particular type of antibody in an infected HIV-1 patient, a study spearheaded by Duke University, including analysis from Los Alamos National Laboratory, has provided insights that will enable vaccination strategies that mimic the actual antibody development within the body. Fuente :...

Semiconductor nanowires are quasi-one-dimensional nanomaterials that have sparked a surge of interest as one of the most powerful and versatile nanotechnological building blocks with actual or potential impact on nanoelectronics, photonics, electromechanics, environmentally friendly energy conversion, biosensing, and...

Researchers have determined that the overexpression of microRNA-155 (miR-155), a short, single strand of ribonucleic acid encoded by the miR-155 host gene, promotes the growth of blood vessels in tumors, tumor inflammation, and metastasis. As a therapeutic target, miR-155 could potentially provide a new avenue of treatment when...

Scientists have for the first time identified a pair of drugs already approved for human use that show anti-prion activity and, for one of them, great promise in treating rare and universally fatal disorders, such as Creutzfeldt-Jakob disease, caused by misfolded proteins called prions. Fuente :...

Scientists have decoded the genome of the western painted turtle, one of the most abundant turtles on Earth, finding clues to their longevity and ability to survive without oxygen during long winters spent hibernating in ice-covered ponds. Fuente : http://feeds.sciencedaily.com/~r/sciencedaily/~3/K...

More useful projections of sea level are possible despite substantial uncertainty about the future behavior of massive ice sheets. In two recent articles, researchers present an approach that provides a consistent means to integrate the potential contribution of continental ice sheets such as Greenland and Antarctica into...

Humans' closest animal relatives, chimpanzees, have the ability to "think about thinking" -- what is called "metacognition," according to new research. Fuente : http://feeds.sciencedaily.com/~r/sciencedaily/~3/7...

During the cold and dark of Arctic winter, sea ice refreezes and achieves its maximum extent, usually in late Feb. or early Mar. According to a NASA analysis, this year the annual maximum extent was reached on Feb. 28 and it was the fifth lowest sea ice winter extent in the past 35 years. Fuente :...