An intravaginal ring developed by a Northwestern University visiting professor effectively delivers HIV-preventing drugs for one month. Fuente : http://www.eurekalert.org/pub_releases/2013-09/nu-...

Clinical trial design for new cancer therapies has historically been focused on the tissue of origin of a tumor, but a paper from researchers at Memorial Sloan-Kettering Cancer Center published in Nature Genetics supports a new approach: one based on the genomic signature of a tumor rather than the...

Blurred images that are unidentifiable as still pictures become understandable once the images are set in motion. Fuente : http://www.eurekalert.org/pub_releases/2013-09/wkh...

Taking a 12-week yoga class and practicing at home was linked to less insomnia -- but not to fewer or less bothersome hot flashes or night sweats. The link between yoga and better sleep was the only statistically significant finding in this MsFLASH Network randomized controlled trial. Fuente :...

Nitrogen fertilizer costs US farmers approximately $8 billion each year, and excess fertilizer can find its way into rivers and streams, damaging the delicate water systems. A discovery by a team of University of Missouri researchers could be the first step toward helping crops use less nitrogen,...

Three months after the flight of the solar observatory Sunrise -- carried aloft by a NASA scientific balloon in early June 2013 -- scientists from the Max Planck Institute for Solar System Research in Germany have presented unique insights into a layer on the sun called the chromosphere. Sunrise...

The "love hormone" oxytocin could increase acceptance of other people, found Neuropsychoanalysis Foundation research grantee Valentina Colonnello Ph.D. research, in "Oxytocin Sharpens Self-other Perceptual Boundary," published online in Psychoneuroendocrinology. The study finds oxytocin can sharpen...

Female promiscuity -- something that occurs in a majority of species, including humans -- results in the ejaculates from two or more males overlapping within her reproductive tract. When this happens, sperm compete for fertilization of the female's eggs. In addition, the female has the opportunity...

A new study for the first time examines the effects of abuse and lack of parental affection across the body's entire regulatory system, and finds a strong biological link for how negative early life experiences affect physical health. Fuente : http://feeds.sciencedaily.com/~r/sciencedaily/~3/k...

Scientists have provided the most comprehensive details yet of the journey energy from the sun takes as it hurtles around Earth's magnetosphere. Understanding the changes energy from the sun undergoes as it travels away and out into space is crucial for scientists to achieve their goal of some day...

A new method to produce accurate computer models of molecules, developed by scientists on the Florida campus of The Scripps Research Institute, combines existing formulas in a kind of algorithmic stew to gain a better picture of molecular structural diversity that is then used to eliminate errors and improve the final model....

New research on tagged humpback whales in Stellwagen Bank National Marine Sanctuary reveals a variety of previously unknown feeding techniques along the seafloor. Rather than a single bottom feeding behavior, the whales show three distinct feeding approaches: Simple side-rolls, side-roll inversions, and repetitive scooping....

For astrophysicists, the interplay of hydrogen -- the most common molecule in the universe -- and the vast clouds of dust that fill the voids of interstellar space has been an intractable puzzle of stellar evolution. Fuente : http://feeds.sciencedaily.com/~r/sciencedaily/~3/H...

The quest for evidence of life on Mars could be more difficult than scientists previously thought. A scientific paper published today details the investigation of a chemical in the Martian soil that interferes with the techniques used by the Curiosity rover to test for traces of life. The chemical causes the evidence to burn...

Researchers have created the optical equivalent of a tuning fork -- a device that can help steady the electrical currents needed to power high-end electronics and stabilize the signals of high-quality lasers. The work marks the first time that such a device has been miniaturized to fit on a chip and may pave the way to...

The first scoop of soil analyzed by the analytical suite in the belly of NASA's Curiosity rover reveals that fine materials on the surface of the planet contain several percent water by weight. Fuente : http://feeds.sciencedaily.com/~r/sciencedaily/~3/A...

The first rock that scientists analyzed on Mars with a pair of chemical instruments aboard the Curiosity rover turned out to be a doozy -- a pyramid-shaped volcanic rock called a "mugearite" that is unlike any other Martian igneous rock ever found. Fuente : http://feeds.sciencedaily.com/~r/sciencedaily/~3/D...

New materials could lead to actuators on a chip and self-deploying medical devices. Ceramics are not known for their flexibility: they tend to crack under stress. But researchers have just found a way around that problem -- for very tiny objects, at least. The team has developed a way of making minuscule ceramic objects that...

Solar storms, powerful eruptions of solar material and magnetic fields into interplanetary space, can cause hazards on Earth known as space weather, ranging from interference with radio communications to extensive power blackouts, complete failure of critical satellites and even the shutdown of GPS-guided transportation and...

Engineering researchers have developed a new drape made from graphene -- the thinnest material known to science -- which can enhance the water-resistant properties of materials with rough surfaces. These "nanodrapes" are less than a nanometer thick, chemically inert, and provide a layer of protection without changing the...

Researchers have pinpointed the precise cellular connections responsible for triggering binge eating. The finding lends insight into a cause for obesity and could lead to treatments for anorexia, bulimia nervosa, and binge eating disorder -- the most prevalent eating disorder in the U.S. Fuente :...

Los fragmentos de roca y granos de arena marciana analizados por el rover Curiosity contienen moléculas de H2O. El vehículo también ha descubierto por primera vez en Marte la presencia de ‘mugearita’, un basalto asociado a las islas y fosas en la Tierra. Son algunos de los resultados que cinco...

Una nueva investigación, publicada esta semana en Science, podría abrir la puerta al desarrollo de nuevos tratamientos para pacientes con enfermedades inflamatorias intestinales como la colitis ulcerosa y la enfermedad de Crohn. Estos trastornos intestinales tienen una incidencia en España de 125 casos por cada 100.000...

Scientists at The Scripps Research Institute (TSRI) have discovered an important process by which special immune cells in the skin help heal wounds. They found that these skin-resident immune cells function as “first responders” to skin injuries in part by producing the molecule known as interleukin-17A (IL-17A), which wards...

Erstmals ist es gelungen, lange Temperaturreihen auf Basis von stabilen Kohlenstoff-Isotopen in Baumringen für das östliche Mittelmeer zu rekonstruieren. Eine jahrgenaue, fast 900-jährige Zeitreihe wurde entwickelt, die das mittelalterliche Klima-Optimum, die kleine Eiszeit zwischen dem 16. und 19. Jahrhundert und auch den...

For the first time a long temperature reconstruction on the basis of stable carbon isotopes in tree rings has been achieved for the eastern Mediterranean. An exactly dated time series of almost 900 year length was established, exhibiting the medieval warm period, the little ice age between the 16th and 19th century as well as...

October is National Breast Cancer Awareness Month, and Mayo Clinic breast cancer experts are available to discuss risk factors, screening and treatments. Fuente : http://www.alphagalileo.org/ViewItem.aspx?ItemId=1...

El Circulo de Lectores, la empresa creada hace 50 años con el modelo de club de socios, ha dado el salto al mundo digital de la mano de Teléfónica. Estas firmas han presentado hoy en Madrid un servicio de lectura digital con suscripción denominado Nubico. Este servicio, que está alojado en la nube,...

Investigadores de la Universidad de Valladolid han analizado el papel que desempeña la interleuquina (IL)-6 y las moléculas de su vía de señalización en diversos procesos inflamatorios de la superficie ocular. Los resultados se han publicado en la revista Molecular Vision. Fuente :...