Tendencias 21. Ciencia, tecnología, sociedad y cultura
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Los niños de cuatro años ya tienen nociones de geometría euclidiana - 14/08/2013

Los adultos humanos de diferentes culturas comparten intuiciones sobre puntos, líneas y figuras de la geometría euclidiana. Ya desde niños desarrollan nociones tempranas para orientarse en el espacio y analizar la forma de los objetos, pero ¿cómo llegan al pensamiento euclidiano?Según un estudio......

Un termómetro a nanoescala - 14/08/2013

Un equipo internacional formado por investigadores del Consejo Superior de Investigaciones Científicas (CSIC) (españa) y del Instituto Italiano de Tecnología ha desarrollado un método para medir y controlar la temperatura en el entorno de nanopartículas magnéticas. El sistema descrito en el......

Un termómetro a nanoescala - 14/08/2013

Un trabajo con participación del Consejo Superior de Investigaciones Científicas desarrolla un método para medir y controlar la temperatura en nanopartículas magnéticas que podría usarse para liberar fármacos de manera controlada dentro del organismo en terapias antitumorales. Fuente :...

Can Y Lingus, las proezas lingüísticas de un perro - 14/08/2013

Entrega del podcast Quilo de Ciencia, realizado por Jorge Laborda (catedrático de Bioquímica y Biología Molecular de la Universidad de Castilla-La Mancha), en Ciencia para Escuchar, que recomendamos por su interés. Los psicólogos John Pilley y Alliston Reid  adoptaron a un perro de la raza......

UGA researchers use nanoparticles to fight cancer - 14/08/2013

Researchers at the University of Georgia are developing a new treatment technique that uses nanoparticles to reprogram immune cells so they are able to recognize and attack cancer. The findings were published recently in the early online edition of ACS Nano. Fuente :...

Children exposed to lead 3 times more likely to be suspended from school - 14/08/2013

Children who are exposed to lead are nearly three times more likely to be suspended from school by the 4th grade than children who are not exposed, according to a new University of Wisconsin-Madison study. Fuente : http://www.eurekalert.org/pub_releases/2013-08/uow...

Potent mechanism helps viruses shut down body's defense system against infection - 14/08/2013

Researchers at the Salk Institute for Biological Studies have discovered a powerful mechanism by which viruses such as influenza, West Nile and Dengue evade the body's immune response and infect humans with these potentially deadly diseases. The findings may provide scientists with an attractive...

UW geographer devises a way for China to resolve its 'immigration' dilemma - 14/08/2013

University of Washington geographer Kam Wing Chan is in China this week, explaining how that country can dismantle its 55-year-old system that limits rural laborers from moving to and settling in cities and qualifying for basic social benefits. Fuente :...

Warming climate pushes plants up the mountain - 14/08/2013

In a rare opportunity to directly compare plant communities in the same area now with a survey taken 50 years ago, a University of Arizona-led research team has provided the first on-the-ground evidence that Southwestern plants are being pushed to higher elevations by an increasingly warmer and...

How neurons get wired - 14/08/2013

University of Arizona scientists have discovered an unknown mechanism that establishes polarity in developing nerve cells. Understanding how nerve cells make connections is an important step in developing cures for nerve damage resulting from spinal cord injuries or neurodegenerative diseases such...

Researchers study selenium's effects on horses - 14/08/2013

Selenium is an essential part of the equine diet. Some horses do not get enough selenium because they graze on forages in areas with low selenium in the soil. Researchers at the University of Kentucky and Alltech are curious whether selenium levels affect how horses respond to vaccines. Fuente :...

Many neurologists unaware of safety risks related to anti-epilepsy drugs - 14/08/2013

A study by Johns Hopkins researchers shows that a fifth of US neurologists appear unaware of serious drug safety risks associated with various anti-epilepsy drugs, potentially jeopardizing the health of patients who could be just as effectively treated with safer alternative medications. Fuente :...

Around the world in 4 days: NASA tracks Chelyabinsk meteor plume - 14/08/2013

Atmospheric physicist Nick Gorkavyi missed witnessing an event of the century last winter when a meteor exploded over his hometown of Chelyabinsk, Russia. From Greenbelt, Md., however, NASA's Gorkavyi and colleagues witnessed a never-before-seen view of the atmospheric aftermath of the explosion....

Current therapies less effective than expected in preventing lung injuries in very premature babies - 14/08/2013

A neonatologist at The Children's Hospital of Philadelphia is the senior author of a large new study that found that current non-invasive techniques for respiratory support are less effective than widely assumed, in reducing the incidence of severe lung injury in very premature infants....

New compound prevents first steps of fungal infection - 13/08/2013

A team of researchers has discovered a chemical compound that prevents fungal cells from adhering to surfaces. Fuente : http://feeds.sciencedaily.com/~r/sciencedaily/~3/Z...

High-angle helix helps bacteria swim - 13/08/2013

It's counterintuitive but true: Some microorganisms that use flagella for locomotion are able to swim faster in gel-like fluids such as mucus. Research engineers have now figured out why. It's the angle of the coil that matters. Fuente : http://feeds.sciencedaily.com/~r/sciencedaily/~3/c...

Ecosystems change long before species are lost - 13/08/2013

Researchers take a detailed look at how species affect an ecosystem as they progress through their lifecycles. Fuente : http://feeds.sciencedaily.com/~r/sciencedaily/~3/a...

Do conservation scientists work too hard? - 13/08/2013

Academics should think twice about taking their work home with them. An international study has shown that conservation scientists do a substantial amount of work out of hours. Fuente : http://feeds.sciencedaily.com/~r/sciencedaily/~3/h...

How genes tell cellular construction crews, 'Read me now!' - 13/08/2013

When egg and sperm combine, the new embryo bustles with activity. Its cells multiply so rapidly they largely ignore their DNA, other than to copy it and to read just a few essential genes. The embryonic cells mainly rely on molecular instructions placed in the egg by its mother in the form of RNA....

Wireless devices go battery-free with new communication technique - 13/08/2013

Engineers have created a new wireless communication system that allows devices to interact with each other without relying on batteries or wires for power. The technology could enable a network of devices and sensors to communicate with no power source or human attention needed. Fuente :...

Low-temperature combustion enables cleaner, more efficient engines - 13/08/2013

As demand climbs for more fuel-efficient vehicles, knowledge compiled over several years about diesel engines and a new strategy known as “low-temperature combustion” (LTC) might soon lead auto manufacturers and consumers to broader use of cleaner diesel engines in the United States. Fuente :...

Children with allergy, asthma may be at higher risk for ADHD - 13/08/2013

Researchers have found that there is an increased risk of ADHD in boys that have a history of allergy or asthma. The study also found an even stronger risk associated with milk intolerance. Fuente : http://feeds.sciencedaily.com/~r/sciencedaily/~3/X...

Computer model predicts red blood cell flow - 13/08/2013

Researchers have now created the first simplified computer model of the process that forms the Fåhræus-Lindqvist layer in our blood -- a model that could help to improve the design of artificial platelets and medical treatments for trauma injuries and for blood disorders such as sickle cell anemia...

Do conservation scientists work too hard? - 13/08/2013

Fuente : http://www.alphagalileo.org/ViewItem.aspx?ItemId=1...

Meal timing can significantly improve fertility in women with polycystic ovaries - 13/08/2013

A common disorder that impairs fertility by producing an overabundance of insulin may be naturally treatable through meal timing. Research indicates that an increased caloric intake at breakfast can lead to lower levels of testosterone and a dramatic increase in ovulation frequency. Fuente :...

Breaking up the superbugs’ party - 13/08/2013

Fuente : http://www.alphagalileo.org/ViewItem.aspx?ItemId=1...

LGBT Identity Data in Health Records Would Improve Care, Reduce Disparities - 13/08/2013

Fuente : http://www.alphagalileo.org/ViewItem.aspx?ItemId=1...

The positive sides of doping - 13/08/2013

Fuente : http://www.alphagalileo.org/ViewItem.aspx?ItemId=1...

Die positiven Seiten des Dopings - 13/08/2013

Fuente : http://www.alphagalileo.org/ViewItem.aspx?ItemId=1...

La dieta mediterránea contrarresta el riesgo genético de sufrir un ictus - 13/08/2013

Una variante del gen asociado con el desarrollo de la diabetes tipo 2 parece interactuar con un patrón de la dieta mediterránea de manera que quienes la siguen previenen derrames cerebrales, según un trabajo conjunto de centros de investigación estadounidenses y españoles. El análisis ha sido...
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