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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 (9025) : society
Fun and games make for better learners
31/10/2014
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CIENCIA ON LINE
Four minutes of physical activity can improve behavior in the classroom for primary school students, according to new research. A brief, high-intensity interval exercise, or a 'FUNterval,' for Grade 2 and Grade 4 students reduced off-task behaviors like fidgeting or inattentiveness in the...
Is fleet diversity key to sustainable fisheries?
31/10/2014
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CIENCIA ON LINE
Concern about fisheries is widespread around the world. Over the past several decades, a robust discussion has taken place concerning how to manage fisheries better to benefit ecosystems and humans. Much of the discussion has focused on preserving biological diversity, a critical component of...
Cell division, minus the cells
31/10/2014
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CIENCIA ON LINE
Researchers have reconstituted cell division -- complete with signals that direct molecular traffic -- without the cell. Combining frog-egg extracts with lipid membranes that mimic the membrane of the cell, they built a cell-free system that recapitulates how the cleavage furrow is assembled....
Decoding the emergence of metastatic cancer stem cells
31/10/2014
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CIENCIA ON LINE
In the first study of its kind, researchers have mapped how information flows through the genetic circuits that cause cancer cells to become metastatic. The research reveals a common pattern in the decision-making that allows cancer cells to both migrate and form new tumors. Fuente :...
Preventing cardiovascular disease in old aortas
31/10/2014
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CIENCIA ON LINE
Researchers look for the root cause of age-related aortic stiffness — an early sign cardiovascular disease — and uncover a potential therapeutic target for reducing or preventing its development. The underlying cause of aortic stiffening is unclear. While much of the previous research pointed to...
Himalayan Viagra fuels caterpillar fungus gold rush
30/10/2014
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CIENCIA ON LINE
Overwhelmed by speculators trying to cash-in on a prized medicinal fungus known as Himalayan Viagra, two isolated Tibetan communities have managed to do at the local level what world leaders often fail to do on a global scale -- implement a successful system for the sustainable harvest of a...
New optimal screening threshold for gestational diabetes in twin pregnancies: Ideal 1-hour 50-g glucose challenge test cutoff ≥135 mg/dl
30/10/2014
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CIENCIA ON LINE
A common complication, gestational diabetes affects approximately 6-7% of pregnant women. Currently, screening is done in two steps to help identify patients most at risk; however, the suggested levels for additional testing were based on singleton pregnancy data. Now investigators have analyzed...
They know the drill: Leading the league in boring through ice sheets
30/10/2014
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CIENCIA ON LINE
Hollow coring drills are used to extract ice cores that can analyze the past atmosphere. Scientists have now documented carbon dioxide in the atmosphere between 23,000 and 9,000 years ago, based on data from an 11,000-foot hole in Antarctica. Fuente :...
Take a walk in the sun to ease time change woes, sleep expert says
30/10/2014
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CIENCIA ON LINE
Daylight saving time ends at 2 a.m. on Sunday, Nov. 2. As clocks turn back one hour, we gain an hour of sleep but often still feel groggy and sluggish. A sleep expert says this change in sleep schedule is exacerbated by our tendency to alter our sleep patterns on the weekends anyway. Fuente :...
Lord of the microrings
30/10/2014
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CIENCIA ON LINE
Researchers report a significant breakthrough in laser technology with the development of a unique microring laser cavity that can produce single-mode lasing on demand. This advance holds ramifications for a wide range of optoelectronic applications including metrology and interferometry, data...
NASA’s Wallops Flight Facility completes initial assessment after Orbital launch mishap
30/10/2014
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CIENCIA ON LINE
The Wallops Incident Response Team completed today an initial assessment of Wallops Island, Virginia, following the catastrophic failure of Orbital Science Corp.'s Antares rocket shortly after liftoff at 6:22 p.m. EDT Tuesday, Oct. 28, from Pad 0A of the Mid-Atlantic Regional Spaceport at NASA's...
First detailed picture of cancer-related cell enzyme in action on chromosome unit
30/10/2014
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CIENCIA ON LINE
New insight into the function of an enzyme related to the BRCA1 breast-cancer protein has been released by researchers. The study produced the first detailed working image of an enzyme in a group that is associated with many types of cancer. The researchers obtained the first crystal structure of...
Same votes, different voting districts would alter election results in NC: Math study bolsters call for non-partisan redistricting reform
30/10/2014
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CIENCIA ON LINE
Researchers have developed a mathematical model that shows how changes in congressional voting districts affect election outcomes. Focusing on the last election, they show the outcome of the 2012 US House of Representatives elections in North Carolina would have been very different had the...
Running robots of future may learn from world's best two-legged runners: Birds
30/10/2014
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CIENCIA ON LINE
With an eye toward making better running robots, researchers have made surprising new findings about some of nature's most energy efficient bipeds -- running birds. Their skills may have evolved from the time of the dinosaurs and they may now be superior to any other bipedal runners -- including...
Case study: Hearing loss in one infant twin affects mother's speech to both babies
30/10/2014
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CIENCIA ON LINE
Is it possible that hearing loss in one infant from a pair of twins can affect the mother’s speech to both infants? A new acoustics study zeroes in on this question and suggests that not only is this alteration of speech entirely possible, but that mothers speak to both infants as if they are...
NASA statement regarding Oct. 28 Orbital Sciences Corp. Launch mishap
29/10/2014
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CIENCIA ON LINE
The following statement is from William Gerstenmaier, Associate Administrator of NASA's Human Exploration and Operations Directorate, regarding the mishap that occurred at Pad 0A of the Mid-Atlantic Regional Spaceport at NASA's Wallops Flight Facility in Virginia during the attempted launch of...
NASA Wallops preparations on track for tonight’s Orbital Sciences launch to International Space Station
29/10/2014
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CIENCIA ON LINE
Ahead of the third U.S. commercial resupply mission to the International Space Station by Orbital Sciences Corp., NASA's Wallops Flight Facility in Virginia continues to enable successful launches from the Eastern Shore. Orbital's Antares rocket carrying 5,000 pounds of NASA cargo aboard the...
Can the wave function of an electron be divided and trapped?
29/10/2014
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CIENCIA ON LINE
Electrons are elementary particles -- indivisible, unbreakable. But new research suggests the electron's quantum state -- the electron wave function -- can be separated into many parts. That has some strange implications for the theory of quantum mechanics. Fuente :...
Pair bonding reinforced in the brain: Zebra finches use their specialized song system for simple communication
28/10/2014
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CIENCIA ON LINE
In addition to their song, songbirds also have an extensive repertoire of calls. While the species-specific song must be learned as a young bird, most calls are, as in the case of all other birds, innate. Researchers have now discovered that in zebra finches the song control system in the brain...
Fewer women than men receive hemodialysis treatment
28/10/2014
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CIENCIA ON LINE
Fewer women than men are treated with dialysis for end-stage kidney disease, according to a new comprehensive analysis of sex-specific differences in treatment. Fuente : http://feeds.sciencedaily.com/~r/sciencedaily/~3/4...
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