Tendencias 21. Ciencia, tecnología, sociedad y cultura
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Jóvenes de Brasil escrutan a su gobierno en la COP 19 - 22/11/2013

La última conferencia de la Organización de las Naciones Unidas (ONU) sobre cambio climático termina en Varsovia políticamente vaciada y sin avances dignos de mención. Brasil, que en el pasado ejerció liderazgo, se vuelve a casa bajo una lluvia de críticas. “La COP 19 (19 Conferencia de las...

'Wise chisels': Art, craftsmanship, and power tools - 22/11/2013

It's often easy to tell at a glance the difference between a mass-produced object and one that has been handcrafted: The handmade item is likely to have distinctive imperfections and clear signs of an individual's technique and style. A new project melds personal style and technique with computerized control systems. Fuente :...

NASA's solar observing fleet to watch Comet ISON's journey around the sun - 22/11/2013

It began in the Oort cloud, almost a light year away. It has traveled for over a million years. It has almost reached the star that has pulled it steadily forward for so long. On Thanksgiving Day, Nov. 28, 2013, Comet ISON will finally sling shot around the sun. Here its inward journey through the...

Acid rain, ozone depletion contributed to ancient extinction - 22/11/2013

Around 250 million years ago, at the end of the Permian period, there was a mass extinction so severe that it remains the most traumatic known species die-off in Earth's history. Some researchers have suggested that this extinction was triggered by contemporaneous volcanic eruptions in Siberia. New...

Greenland's shrunken ice sheet: We've been here before - 22/11/2013

Think Greenland’s ice sheet is small today? It was smaller — as small as it's been in recent history — from 3-5,000 years ago, according to scientists who studied the ice sheet’s history using a new technique they developed for interpreting the Arctic fossil record. Fuente :...

Lessons to be learnt about influenza A, four years after the public alarm - 22/11/2013

With autumn just around the corner and a new flu strain lying in wait for us, the presentation of a study analyzing the management of the 2009 influenza A crisis could not, if anything, be better timed. Fuente : http://feeds.sciencedaily.com/~r/sciencedaily/~3/3...

Stuck on flu - 22/11/2013

Researchers have shown for the first time how influenza A viruses snip through a protective mucus net to both infect respiratory cells and later cut their way out to infect other cells. Fuente : http://feeds.sciencedaily.com/~r/sciencedaily/~3/T...

Link between allergies, increased risk of blood cancers in women - 22/11/2013

A team of scientists looking into the interplay of the immune system and cancer have found a link between a history of airborne allergies – in particular to plants, grass and trees – with risk of blood cancers in women. Fuente : http://feeds.sciencedaily.com/~r/sciencedaily/~3/b...

Alteran moléculas del agua para mejorar riegos agrícolas - 22/11/2013

Empresarios mexicanos desarrollaron un dispositivo que reorganiza la estructura molecular del agua a través de magnetización, alterando así sus propiedades físicas. El resultado, conocido comercialmente como agua estructurada, hexagonal o biofotónica, puede emplearse para optimizar la producción...

A gripeari buruzko irakaspenak, alarma sozialetik lau urtetara - 22/11/2013

A gripeak sortutako alarma sozialetik lau urtetara, UPV/EHUko tesi batek pandemia haren kudeaketari eta ondorioei ekin die ikuspuntu pediatrikotik Fuente : http://www.alphagalileo.org/ViewItem.aspx?ItemId=1...

Lecciones sobre gripe A, cuatro años después de la alarma - 22/11/2013

Cuatro años después de la alarma social generada por la gripe A, una tesis de UPV/EHU aborda la gestión y consecuencias de dicha pandemia desde el punto de vista pediátrico. Fuente : http://www.alphagalileo.org/ViewItem.aspx?ItemId=1...

Lessons to be learnt about influenza A, four years after the public alarm - 22/11/2013

Four years after the public alarm caused by the influenza A virus, a UPV/EHU-University of the Basque Country thesis addresses from a paediatric perspective how the pandemic was managed and the consequences it had. Fuente : http://www.alphagalileo.org/ViewItem.aspx?ItemId=1...

Journal of the American College of Nutrition Reviews the Effect of Fiber on Satiety and Food Intake - 22/11/2013

While epidemiologic studies associate fiber intake with lower body weight, researchers from the University of Minnesota Department of Food Science and Nutrition recently challenged increased satiety and energy intake as possible determining factors. Their findings are presented in “The Effect of...

Investments in aging biology research will pay longevity dividend - 22/11/2013

Finding a way to slow the biological processes of aging will do more to extend the period of healthy life in humans than attacking individual diseases alone, according to some of the nation's top gerontologists. Fuente : http://feeds.sciencedaily.com/~r/sciencedaily/~3/I...

Biodiversity higher in the tropics, but species more likely to arise at higher latitudes - 22/11/2013

A study of 2300 species of mammals and 6700 species of birds helps explain why there are more species in the tropics than at higher latitudes. Researchers found that while the tropics harbor more species, the number of subspecies increases in the harsher environments typical of higher latitudes....

Carbon capture and storage: An inside look at a metal-organic framework (MOF) in action - 22/11/2013

A unique inside look at the electronic structure of a highly touted metal-organic framework (MOF) as it is adsorbing carbon dioxide gas should help in the design of new and improved MOFs for carbon capture and storage. Fuente : http://feeds.sciencedaily.com/~r/sciencedaily/~3/d...

Sugar-sweetened beverage consumption increases endometrial cancer risk - 22/11/2013

Postmenopausal women who consumed sugar-sweetened beverages were more likely to develop the most common type of endometrial cancer compared with women who did not drink sugar-sweetened beverages, according to a study published. Fuente : http://feeds.sciencedaily.com/~r/sciencedaily/~3/J...

El mesías de los pobres nepalíes viaja en helicóptero - 22/11/2013

La campaña electoral en Nepal estuvo marcada por el derroche de un ex primer ministro y guerrillero maoísta, autoproclamado el Mesías de los pobres, que se trasladaba en helicóptero a la caza de votos en ese pequeño país del Himalaya donde 25 por ciento de la población está sumida en la pobreza....

Political correctness could affect holiday weight gain - 22/11/2013

As the festivities proceed, so do countless tips for keeping off extra weight this season. But, there is one factor most people likely won't consider -- political correctness. Research suggests you could be choosing unhealthy options to serve your guests because you don't want to offend someone...

Chemotherapy: When intestinal bacteria provide reinforcement - 22/11/2013

Research has led to a rather surprising discovery on the manner in which cancer chemotherapy treatments act more effectively with the help of the intestinal flora (also known as the intestinal microbiota). Fuente : http://feeds.sciencedaily.com/~r/sciencedaily/~3/m...

Powerful tool for genetic engineering - 22/11/2013

Viruses cannot only cause illnesses in humans, they also infect bacteria. Those protect themselves with a kind of "immune system" which -- simply put -- consists of specific sequences in the genetic material of the bacteria and a suitable enzyme. Scientists have now shown that the dual-RNA guided...

Extent of obesity not strongest factor for patients when choosing weight loss operation - 22/11/2013

A new study investigating why obese patients choose one type of weight loss operation over another reveals that the main factors influencing decision making are whether patients have type 2 diabetes, how much weight they want to lose, and their tolerance for surgical risk to achieve their ideal...

Terror adolescente a la prueba del VIH en Zimbabwe - 22/11/2013

Natalie Mlambo, de 17 años, tiene dos buenas razones para hacerse la prueba del VIH, ya que mantiene relaciones sexuales sin protección con sus dos novios. Uno es un compañero de la escuela secundaria y el otro, mayor, trabaja en un banco y le da pequeños obsequios y dinero a cambio de sexo....

Copper promises cheaper, sturdier fuel cells - 22/11/2013

Chemists are exploring the use of copper nanowires in fuel cells to convert solar energy into storable fuel. Copper nanowire catalysts cost less to produce than their indium tin oxide counterparts because they can be "printed" on pieces of glass or plastic in a liquid ink form, using a machine that...

Pre-industrial rise in greenhouse gases had natural and anthropogenic causes - 22/11/2013

For years scientists have intensely argued over whether increases of potent methane gas concentrations in the atmosphere -- from about 5,000 years ago to the start of the industrial revolution -- were triggered by natural causes or human activities. A new study suggests the increase in methane...

Expert assessment: Sea-level rise could exceed one meter in this century - 22/11/2013

Sea-level rise in this century is likely to be 70-120 centimeters by 2100 if greenhouse-gas emissions are not mitigated, a broad assessment of the most active scientific publishers on that topic has revealed. The 90 experts participating in the survey anticipate a median sea-level rise of 200-300...

Research funding has become prone to bubble formation - 22/11/2013

Fashions in research funding, reward structures in universities and streamlining of scientific agendas undermine traditional academic norms and may result in science bubbles. New research shows how the mechanisms that set off the financial crisis might be replicating in the field of science. Fuente...

Sea level rise forecasts helped by insights into glacier melting - 22/11/2013

Predictions of sea level rise could become more accurate, thanks to new insight into how glacier movement is affected by melting ice in summer. Fuente : http://feeds.sciencedaily.com/~r/sciencedaily/~3/k...

Satellite trio to explore the Earth's magnetic field - 22/11/2013

In a dense fog, a Russian Rockot rocket on 22 November 2013 cleared the launchpad of the Baikonur Cosmodrome on schedule at 13:02:15 CET. In the tip of the rocket: three identical satellites to measure Earth's magnetic field. A good hour and a half later, at 14:37:48 CET, the report of success: all...

College students more likely to be lawbreakers if spanked as children - 22/11/2013

No matter where they live in the world, university students who were spanked as children are more likely to engage in criminal behavior, according to new research. Even young adults whose parents were generally loving and helpful as they were growing up showed higher rates of criminal behavior....
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