Tendencias 21. Ciencia, tecnología, sociedad y cultura
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Tendencias 21







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Where Alzheimer's starts and how it spreads - 22/12/2013

Using high-resolution fMRI imaging in patients with Alzheimer's disease and in mouse models of the disease, researchers have clarified three fundamental issues about Alzheimer's: where it starts, why it starts there, and how it spreads. In addition to advancing understanding of Alzheimer's, the...

Scientists anticipated size and location of 2012 Costa Rica earthquake - 22/12/2013

Scientists using GPS to study changes in the Earth’s shape accurately forecasted the size and location of the magnitude 7.6 Nicoya earthquake that occurred in 2012 in Costa Rica. Fuente : http://feeds.sciencedaily.com/~r/sciencedaily/~3/C...

Malaria drug target raises hopes for new treatments - 22/12/2013

Scientists have taken an important step towards new malaria treatments by identifying a way to stop malaria parasites from multiplying. Fuente : http://feeds.sciencedaily.com/~r/sciencedaily/~3/l...

Some plants may not adapt quickly to future climate change - 22/12/2013

Using the largest dated evolutionary tree of flowering plants ever assembled, a new study suggests how plants developed traits to withstand low temperatures, with implications that human-induced climate change may pose a bigger threat than initially thought to plants and global agriculture. Fuente...

Innovative screening strategy swiftly uncovers new drug candidates, new biology - 22/12/2013

Scientists have demonstrated a drug-discovery strategy with a double payoff —- it enables the rapid selection of chemical compounds that have a desired effect on cells and also highlights how the compounds work. Fuente : http://feeds.sciencedaily.com/~r/sciencedaily/~3/M...

Malaria drug target raises hopes for new treatments - 22/12/2013

Scientists have taken an important step towards new malaria treatments by identifying a way to stop malaria parasites from multiplying. Fuente : http://www.eurekalert.org/pub_releases/2013-12/icl...

Innovative screening strategy swiftly uncovers new drug candidates, new biology - 22/12/2013

Scientists at The Scripps Research Institute have demonstrated a drug-discovery strategy with a double payoff -- it enables the rapid selection of chemical compounds that have a desired effect on cells and also highlights how the compounds work.To illustrate the power of the innovative technique,...

'Be different or die' does not drive evolution - 22/12/2013

A new study has found that species living together are not forced to evolve differently to avoid competing with each other, challenging a theory that has held since Darwin's Origin of Species. Fuente : http://www.eurekalert.org/pub_releases/2013-12/uoo...

Greenland ice stores liquid water year-round - 22/12/2013

Researchers have found an extensive reservoir in the Greenland Ice Sheet that holds water year round. A surprising discovery, the existence of the 27,000 square mile aquifer adds important information to sea level rise calculations. Fuente : http://www.eurekalert.org/pub_releases/2013-12/uou...

Researchers create largest evolutionary 'timetree' of land plants to investigate traits that permit survival in cold climates - 22/12/2013

A team of researchers studying plants has assembled the largest dated evolutionary tree, using it to show the order in which flowering plants evolved specific strategies, such as the seasonal shedding of leaves, to move into areas with cold winters. The researchers, including University of...

Solar activity not a key cause of climate change, study shows - 22/12/2013

Climate change has not been strongly influenced by variations in heat from the sun, a new scientific study shows. Fuente : http://www.eurekalert.org/pub_releases/2013-12/uoe...

York scientists' significant step forward in biofuels quest - 22/12/2013

Scientists at the University of York have made a significant step in the search to develop effective second generation biofuels. Fuente : http://www.eurekalert.org/pub_releases/2013-12/uoy...

Scientists anticipated size and location of 2012 Costa Rica earthquake - 22/12/2013

Scientists using GPS to study changes in the Earth's shape accurately forecasted the size and location of the magnitude 7.6 Nicoya earthquake that occurred in 2012 in Costa Rica. Fuente : http://www.eurekalert.org/pub_releases/2013-12/gio...

The analogue of a tsunami for telecommunication - 22/12/2013

Lomonosov Moscow State University scientists in collaboration with Swiss colleagues made a breakthrough invention of a new type of compact optical device generating stable ultrashort laser pulses. Fuente : http://www.eurekalert.org/pub_releases/2013-12/lms...

Study: Some plants may not adapt quickly to future climate change - 22/12/2013

Using the largest dated evolutionary tree of flowering plants ever assembled, a new study suggests how plants developed traits to withstand low temperatures, with implications that human-induced climate change may pose a bigger threat than initially thought to plants and global agriculture. Fuente...

El largo camino para visibilizar la trata en España - 21/12/2013

María vino a España de Paraguay para trabajar de limpiadora en un hotel, pero era un engaño y acabó en un club de alterne obligada a prostituirse. Una noche se sinceró con un cliente que, impresionado por su historia, contrató sus servicios durante días hasta que le consiguió un empleo lejos y después se casó […]El...

Virginia Tech research overturns assumption about mercury in the Arctic - 21/12/2013

A team of scientists from the U.S., Russia, and Canada has compared fish from two Russian rivers, the Lena and the Mezen, and found mercury concentrations to be much lower than expected. Fuente : http://www.alphagalileo.org/ViewItem.aspx?ItemId=1...

Sierra Nevada, western North America, and the Andaman Sea Focus of New Geosphere Articles - 21/12/2013

New Geosphere contributions include two additions to the "Origin and Evolution of the Sierra Nevada and Walker Lane" special series. Four articles focus on western North America, while a fifth discusses faulting in the northern Mergui Basin of the Andaman Sea. Authors hale from the University of...

Van Allen Probes shed light on decades-old mystery - 21/12/2013

New research using data from NASA's Van Allen Probes mission helps resolve decades of scientific uncertainty over the origin of ultra-relativistic electrons in Earth's near space environment, and is likely to influence our understanding of planetary magnetospheres throughout the universe. Fuente :...

Assumption about mercury in the Arctic overturned - 21/12/2013

A team of scientists from the U.S., Russia, and Canada has compared fish from two Russian rivers, the Lena and the Mezen, and found mercury concentrations to be much lower than expected. Fuente : http://feeds.sciencedaily.com/~r/sciencedaily/~3/N...

Why it snows so much in the frozen north - 21/12/2013

Scientists have long puzzled over the seemingly ceaseless drizzle of snow drifting down from arctic clouds. Now they may have an explanation. Fuente : http://feeds.sciencedaily.com/~r/sciencedaily/~3/F...

Kim III - 21/12/2013

Una épica propia de Shakespeare se desarrolla hoy en Pyongyang. La tragedia implica a un hijo y a su tío político. Tiene complots, fortunas que se vuelcan, denuncias dramáticas y una creciente ola de sangre. Las declaraciones oficiales de Corea del Norte sobre el caso suenan como propias del bardo...

Acknowledgement of Mexican participation in the finding of Higgs boson - 20/12/2013

The Nobel Prize in Physics, received on the 10th of December by François Englert and Peter Higgs in Stockholm, Sweden, has a Mexican essence. Higgs boson, the elemental particle that gives mass to matter, required to demonstrate its existence, and this was achieved by an international team of which...

Not just Koch brothers: New study reveals funders behind climate change denial effort - 20/12/2013

A new study exposes the organizational underpinnings and funding behind the powerful climate change counter movement. This study marks the first peer-reviewed, comprehensive analysis ever conducted of the sources of funding that maintain the denial effort. Fuente :...

Researchers grow liquid crystal 'flowers' that can be used as lenses - 20/12/2013

A team of material scientists, chemical engineers and physicists has made another advance in their effort to use liquid crystals as a medium for assembling structures. Their earlier studies produced patterns of "defects," useful disruptions in the repeating patterns found in liquid crystals, in...

Religion is good for business, shows study - 20/12/2013

Those looking for honest companies to invest in might want to check out businesses based in more religious communities, suggests a new paper. The study found that businesses with head offices in places with high levels of "religiosity" were less likely to experience stock price crashes as a result...

Starless cloud cores reveal why some stars are bigger than others - 20/12/2013

Massive stars -- those at least 8 times the mass of our Sun -- present an intriguing mystery: how do they grow so large when the vast majority of stars in the Milky Way are considerably smaller? Massive stars -- those at least 8 times the mass of our Sun -- present an intriguing mystery: how do...

Researchers find potential new treatment approach for pancreatic cancer - 20/12/2013

Scientists believe they have discovered a new way to make chemotherapy treatment more effective for pancreatic cancer patients. Pancreatic cancer is an aggressive cancer with poor prognosis and limited treatment options and is highly resistant to chemotherapy and radiotherapy. Fuente :...

Wrong molecular turn leads down path to Type 2 diabetes - 20/12/2013

Computing resources have helped researchers better grasp how proteins misfold to create the tissue-damaging structures that lead to type 2 diabetes. The structures, called amyloid fibrils, are also implicated in neurodegenerative conditions such as Alzheimer's and Parkinson's, and in prion diseases...

Possible link between cognitive depressive symptoms, antiretroviral therapy uptake - 20/12/2013

Researchers found that among HIV-infected Russian drinkers, depressive symptom severity alone was not significantly associated with lower rates of antiretroviral therapy (ART) initiation. However, when examining cognitive symptoms of depression, results showed that high levels of depressive...
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