Tendencias 21. Ciencia, tecnología, sociedad y cultura
TENDENCIAS21



05/05/2025

Tendencias 21







CIENCIA ON LINE

Historic datasets reveal effects of climate change and habitat loss on plant-pollinator networks - 28/02/2013

Two biologists at Washington University in St. Louis were delighted to discover a meticulous dataset on a plant-pollinator network recorded by Illinois naturalist Charles Robertson between 1884 and 1916. Re-collecting part of Robertson's network, they learned that although the network has...

Biologists compare new bees to 100-year-old records - 28/02/2013

Researchers have found that bees and plants have been surprisingly resilient in the face of warmer temperatures and changing land use. The forests that once grew 10 miles outside of Carlinville are fragments of what they were when Robertson, who collected specimens in the late 1800s, drove his...

NASA's Van Allen Probes reveal a new radiation belt around Earth - 28/02/2013

NASA's Van Allen Probes mission has discovered a previously unknown third radiation belt around Earth, revealing the existence of unexpected structures and processes within these hazardous regions of space. Fuente : http://feeds.sciencedaily.com/~r/sciencedaily/~3/6...

Un cinturón desconocido de ‘electrones asesinos’ rodeó la Tierra durante un mes - 28/02/2013

Las sondas Van Allen descubren un tercer anillo de radiación en torno a la Tierra desconocido hasta ahora. Estos anillos son una amenaza para astronautas y satélites y producen las auroras boreales ||| Fuente : http://esmateria.com/2013/02/28/un-cinturon-descon...

España evitó 100.000 muertes por malaria con un programa al que ha dejado sin dinero - 28/02/2013

Un informe destaca el liderazgo español en la lucha contra la malaria hasta 2010. España puso 177 millones de euros contra esta enfermedad en un Fondo Global al que no ha añadido un euro desde entonces ||| Fuente : http://esmateria.com/2013/02/28/espana-evito-100-0...

Grape seed and skin extract: A weapon in the fight against kidney disease caused by high-fat diets - 28/02/2013

New insight into grape seed extract as a therapeutic and preventative measure to fight obesity-induced kidney damage is presented in a new study. Grape seed and skin extract (GSSE) is known to contain powerful antioxidants. This study is the first to make a link between GSSEs and...

Brain pathway triggering impulsive eating identified - 28/02/2013

New research has identified the neural pathways in an insect brain tied to eating for pleasure, a discovery that sheds light on mirror impulsive eating pathways in the human brain. Fuente : http://feeds.sciencedaily.com/~r/sciencedaily/~3/w...

Reducing numbers of one carnivore species indirectly leads to extinction of others - 28/02/2013

Previous studies have shown that carnivores can have indirect positive effects on each other, which means that when one species is lost, others could soon follow. Biologists have now found that reducing the numbers of one species of carnivore can lead to the extinction of others. Fuente :...

Improving climate protection in the agricultural sector - 28/02/2013

Agriculture is responsible for around 10 to 12 percent of all greenhouse gases attributable to human activities. This raises the question of how these emissions could be reduced. A recent study has investigated -- for the first time -- the full range of factors that contribute to greenhouse gas...

Los científicos advierten a Rajoy del deterioro irreparable de la imagen de España - 28/02/2013

Las sociedades científicas piden al presidente del Gobierno que marque con nitidez su compromiso con la política de I+D+i y que garantice su cumplimiento ||| Fuente : http://esmateria.com/2013/02/28/los-cientificos-ad...

Doce trabajadores de Fukushima sufren un “riesgo notable” de desarrollar cáncer - 28/02/2013

Hasta un tercio de los 20.000 operarios que pasaron por la central nuclear tienen más posibilidades de lo normal de sufrir un cáncer por la radiactividad recibida, según un informe presentado hoy por Organización Mundial de la Salud. El resto de la población no presenta graves amenazas ||| Fuente :...

Ganador de la primera edición del premsio SysNova de la ESA - 28/02/2013

Ya tiene ganador la primera edición del premio SysNova de la ESA, un concurso que busca soluciones de diseño para misiones espaciales. No se trata de los Óscar ni hubo famosos de Hollywood, pero SysNova ... Fuente : http://www.esa.int/ESA_in_your_country/Spain/Ganad...

La veloz rotación de un agujero negro encierra la historia de su galaxia - 28/02/2013

Los observatorios espaciales XMM-Newton de la ESA y NuSTAR de la NASA han hallado, en el corazón de una galaxia espiral, un agujero negro supermasivo girando casi a la velocidad de la luz, ofreciendo nueva información sobre cómo crecen las ga... Fuente :...

British Columbia traffic deaths could be cut in half - 28/02/2013

A study by a Simon Fraser University researcher shows British Columbia has much higher traffic death rates than most northern European countries. Comparisons to the safest country, the Netherlands, suggest B.C. could reduce the number of traffic deaths by more than 200 per year. It also found that...

Mineral diversity clue to early Earth chemistry - 28/02/2013

Mineral evolution is a new way to look at our planet's history. It's the study of the increasing diversity and characteristics of Earth's near-surface minerals, from the dozen that arrived on interstellar dust particles when the Solar System was formed to the more than 4,700 types existing today....

CETS offers new method to help simplify the study of brain pathologies - 28/02/2013

A study in the March 2013 issue of Epigenetics titled "A cell epigenotype specific model for the correction of brain cellular heterogeneity bias and its application to age, brain region and major depression" shows a publicly available new method to identify heterogeneous brain cells. Fuente :...

Third radiation belt discovered with UNH-led instrument suite - 28/02/2013

Although scientists involved in NASA's Van Allen Probes mission were confident they would eventually be able to rewrite the textbook on Earth's twin radiation belts, getting material for the new edition just two days after launch was surprising, momentous, and gratifying. Fuente :...

Adult sleepwalking is serious condition that impacts health-related quality of life - 28/02/2013

A new study found that adult sleepwalking is a potentially serious condition that may induce violent behaviors and affect health-related quality of life. Fuente : http://www.eurekalert.org/pub_releases/2013-02/aao...

Elephants are vanishing from DRC's best-run reserve - 28/02/2013

Democratic Republic of Congo's largest remaining forest elephant population, located in the Okapi Faunal Reserve, has declined by 37 percent in the last five years, with only 1,700 elephants now remaining, according to wildlife surveys by WCS and DRC officials. Fuente :...

New model could lead to improved treatment for early stage Alzheimer's - 28/02/2013

Researchers at the University of Florida and The Johns Hopkins University have developed a line of genetically altered mice that model the earliest stages of Alzheimer's disease. This model may help scientists identify new therapies to provide relief to patients who are beginning to experience...

Research unearths new dinosaur species - 28/02/2013

A South Dakota School of Mines & Technology paleontologist and his team have discovered a new species of herbivorous dinosaur and published the first fossil evidence of prehistoric crocodyliforms feeding on small dinosaurs. Fuente : http://www.eurekalert.org/pub_releases/2013-02/sds...

ACC/HRS release appropriate use criteria for ICDs and CRT - 28/02/2013

The American College of Cardiology and the Heart Rhythm Society, along with key specialty societies, today released appropriate use criteria for implantable cardioverter-defibrillators and cardiac resynchronization therapy. The document provides assessed levels of appropriateness for implanting the...

Sea lamprey genome mapped with help from scientists at OU - 28/02/2013

Two scientists from University of Oklahoma help map genome of sea lamprey Fuente : http://www.eurekalert.org/pub_releases/2013-02/uoo...

Pour, shake and stir - 28/02/2013

A diagnostic "cocktail" containing a single drop of blood, a dribble of water, and a dose of DNA powder with gold particles could mean rapid diagnosis and treatment of the world's leading diseases in the near future. The cocktail diagnostic is a homegrown brew being developed by University of Toronto's Institute of...

NOAA and NASA's next generation weather satellite may provide earlier warnings - 28/02/2013

A new satellite that will detect the lightning inside storm clouds may lead to valuable improvements in tornado detection. The GOES-R satellite is currently being built with new technology that may help provide earlier warnings for severe weather. Fuente : http://www.eurekalert.org/pub_releases/2013-02/nsf...

NASA's Van Allen Probes discover a surprise circling Earth - 28/02/2013

After most NASA science spacecraft launches, researchers wait patiently for months as instruments on board are turned on one at a time, slowly ramped up to full power, and tested to make sure they work at full capacity. It's a rite of passage for any new satellite in space, and such a schedule was in place for the Van Allen...

Zeroing in on heart disease - 28/02/2013

Studies screening the genome of hundreds of thousands of individuals have linked more than 100 regions in the genome to the risk of developing cardiovascular disease. Researchers from EMBL and the University of Heidelberg are taking these results one step further by pinpointing the exact genes that could have a role in the...

New marine species discovered in Pacific Ocean - 28/02/2013

Nova Southeastern U. Professor Jim Thomas leads international expedition in Papua New Guinea that finds new species of sea slugs, feather stars and amphipods, a shrimp-like animal. Fuente : http://www.eurekalert.org/pub_releases/2013-02/nsu...

Cinco grandes enfermedades mentales comparten factores genéticos de riesgo - 28/02/2013

Entre los psiquiatras hay muchas dudas sobre la separación entre enfermedades como la esquizofrenia y el autismo. La genética puede ayudar a definir mejor estos trastornos y sus tratamientos ||| Fuente : http://esmateria.com/2013/02/28/cinco-grandes-enfe...

NHL drafts the wrong players due to birthday bias - 28/02/2013

A hockey player's birthday strongly biases how professional teams assess his talent, according to a new study. Fuente : http://feeds.sciencedaily.com/~r/sciencedaily/~3/a...
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NOTICIAS DESTACADAS
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La poética nómada o el decir en la niebla de Menchu Gutiérrez

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Entre el minimalismo y la instantánea: “Acércate y escucha", de Charles Simic

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Antonio Gamoneda. Imagen: Fernando Sanz Santa Cruz.

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Recuperado el camino de la imaginación de Juan Larrea

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Ernesto Cardenal y María Ángeles Pérez López en 2013 contemplando las cigüeñas en Salamanca. Imagen: Elena Díaz Santana.

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Contemplación y materiales: la enorme poesía de Ernesto Cardenal

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 Espacios míticos en los “Parques cerrados” de Juan Campos Reina

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Espacios míticos en los “Parques cerrados” de Juan Campos Reina

Ángela Figuera Aymerich. Fuente: Ediciones Tigres de Papel.

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Más allá del desastre: una semblanza de Ángela Figuera Aymerich

“Flota”, el baúl literario de Anne Carson

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¿Cómo acabaron en un libro los sueños y pesadillas del mundo occidental?

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La paradoja de la identidad local en “Muchacha de Castilla”, de Mercedes Cebrián

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