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REVISTA ELECTRÓNICA DE CIENCIA, TECNOLOGÍA, SOCIEDAD Y CULTURA. ISSN 2174-6850/ 31 años divulgando conocimiento (desde 1988)
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Tags (9027) : technology

Support for controversial Darwin theory of 'jump dispersal'

01/10/2014 | CIENCIA ON LINE
More than one hundred and fifty years ago, Charles Darwin hypothesized that species could cross oceans and other vast distances on vegetation rafts, icebergs, or in the case of plant seeds, in the plumage of birds. Though many were skeptical of Darwin's 'jump dispersal' idea, a new study suggests...

New drug-delivery capsule may replace injections

01/10/2014 | CIENCIA ON LINE
A pill coated with tiny needles can deliver drugs directly into the lining of the digestive tract, researchers have found, suggesting that the end of injections may be near. Fuente : http://feeds.sciencedaily.com/~r/sciencedaily/~3/A...

Astronomy: Wild ducks take flight in open cluster

01/10/2014 | CIENCIA ON LINE
The Wide Field Imager on the MPG/ESO 2.2-meter telescope at ESO's La Silla Observatory in Chile has taken this beautiful image, dappled with blue stars, of one of the most star-rich open clusters currently known -- Messier 11, also known as NGC 6705 or the Wild Duck Cluster. Fuente :...

Semen secrets: How a previous sexual partner can influence another male's offspring

01/10/2014 | CIENCIA ON LINE
Scientists have discovered a new form of non-genetic inheritance, showing for the first time that offspring can resemble a mother's previous sexual partner -- in flies at least. Researchers manipulated the size of male flies and studied their offspring. They found that the size of the young was...

Novel approach to magnetic measurements atom-by-atom

01/10/2014 | CIENCIA ON LINE
Having the possibility to measure magnetic properties of materials at atomic precision is one of the important goals of today's experimental physics. Such measurement technique would give engineers and physicists an ultimate handle over magnetic properties of nano-structures for future...

Satellite measurements reveal gravity dip from ice loss in West Antarctica

01/10/2014 | CIENCIA ON LINE
Although not designed to map changes in Earth's gravity over time, ESA's GOCE satellite has shown that the ice lost from West Antarctica over the last few years has left its signature. More than doubling its planned life in orbit, GOCE spent four years measuring Earth's gravity in unprecedented...

An apple a day could keep obesity away

30/09/2014 | CIENCIA ON LINE
Nondigestible compounds in apples -- specifically, Granny Smith apples -- may help prevent disorders associated with obesity, scientists have concluded. "We know that, in general, apples are a good source of these nondigestible compounds but there are differences in varieties," said the study's...

Brief depression questionnaires could lead to unnecessary antidepressant prescriptions

30/09/2014 | CIENCIA ON LINE
Short questionnaires used to identify patients at risk for depression are linked with antidepressant medications being prescribed when they may not be needed, according to new research. Known as "brief depression symptom measures," the self-administered questionnaires are used in primary care...

Higher nurse-to-patient standard improves staff safety, study shows

30/09/2014 | CIENCIA ON LINE
A 2004 California law mandating specific nurse-to-patient staffing standards in acute care hospitals significantly lowered job-related injuries and illnesses for both registered nurses and licensed practical nurses, according to research. Fuente :...

'Deadly diarrhea' rates nearly doubled in 10 years: Study

30/09/2014 | CIENCIA ON LINE
Infections with the intestinal superbug C. difficile nearly doubled from 2001 to 2010 in US hospitals without noticeable improvement in patient mortality rates or hospital lengths of stay, according to a study of 2.2 million C. difficile infection cases. Fuente :...

New transparent nanoscintillators for radiation detection developed

30/09/2014 | CIENCIA ON LINE
Tadiation detection properties have been identified in a light-emitting nanostructure made in a new way from two of the least expensive rare earth elements. The new material is made from two of the least expensive rare earth elements, so it is cost-effective, estimated at a little over $7 per...

'Frenemy' in Parkinson's disease takes to crowdsourcing

29/09/2014 | CIENCIA ON LINE
A key neuronal protein called alpha-synuclein normally gathers in synapses, where aggregates of it help regulate neurotransmissions, researchers have found. In overabundance, though, a-synuclein can choke off communication altogether, leading to neuronal death and related diseases. Fuente :...

Single-neuron 'hub' orchestrates activity of an entire brain circuit

29/09/2014 | CIENCIA ON LINE
New research makes a major contribution to efforts to navigate the brain, offering a precise model of the organization of developing neuronal circuits. If researchers can further identify the cellular type of 'hub neurons,' it may be possible to reproduce them in vitro and transplant them into...

While the Arctic is melting the Gulf Stream remains

28/09/2014 | CIENCIA ON LINE
The melting Arctic is not the source for less saline Nordic Seas. It is the Gulf Stream that has provided less salt. A new study documents that the source of fresher Nordic Seas since 1950 is rooted in the saline Atlantic as opposed to Arctic freshwater that is the common inference. Fuente :...

Human genome was shaped by an evolutionary arms race with itself

28/09/2014 | CIENCIA ON LINE
An evolutionary arms race between rival elements within the genomes of primates drove the evolution of complex regulatory networks that orchestrate the activity of genes in every cell of our bodies, researach shows. The arms race is between mobile DNA sequences known as 'retrotransposons' (a.k.a....

Early Sign of Pancreatic Cancer identified by researchers

28/09/2014 | CIENCIA ON LINE
A sign of the early development of pancreatic cancer –- an upsurge in certain amino acids that occurs before the disease is diagnosed and symptoms appear -- has been identified by a team of researchers. Although the increase isn’t large enough to be the basis of a new test for early detection of...

Adding cediranib to chemotherapy improves progression-free survival for metastatic or recurrent cervical cancer, phase II trial shows

28/09/2014 | CIENCIA ON LINE
For patients with cervical cancer that has recurred after treatment or has spread elsewhere in the body, adding the experimental drug cediranib to standard chemotherapy improves tumor shrinkage and adds a modest improvement in progression-free survival, researchers report. Fuente :...

Pertuzumab adds 16 months survival benefit to trastuzumab and chemotherapy treatment for HER2-positive metastatic breast cancer

28/09/2014 | CIENCIA ON LINE
Patients with HER2-positive breast cancer that has spread to other parts of their body live around 16 months longer if treated with a combination of pertuzumab, trastuzumab and chemotherapy compared to those treated with trastuzumab and chemotherapy alone, updated results from the CLEOPATRA study...

New poison dart frog species discovered in Donoso, Panama

27/09/2014 | CIENCIA ON LINE
A bright orange poison dart frog with a unique call has been discovered in Donoso, Panama. Because this new frog species appears to be found in only a very small area, habitat loss and collecting for the pet trade are major threats to its existence. The authors recommend the formulation of...

New molecule found in space connotes life origins

27/09/2014 | CIENCIA ON LINE
Hunting from a distance of 27,000 light years, astronomers have discovered an unusual carbon-based molecule contained within a giant gas cloud in interstellar space. The discovery suggests that the complex molecules needed for life may have their origins in interstellar space. Fuente :...

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