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Fruit flies use alcohol as a drug to kill parasites - 0 views

  • February 16, 2012
  • according to a study published online on Feb. 16 in Current Biology
  • fruit flies will actually seek out alcohol to kill off blood-borne parasitic wasps living within them
  • ...5 more annotations...
  • consume alcohol to self-medicate, a behavior that greatly increases their survival rate
  • believe our results are the first to show that alcohol consumption can have a protective effect against infectious disease, and in particular against blood-borne parasites
  • the common fruit fly that swirls around browning bananas in your kitchen
  • The amount of alcohol in their natural habitat can range from 5 to 15 percent
  • fruit flies are really good at detoxifying alcohol."
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Could the Video-Game Tetris Curb Cravings for Food, Cigarettes and Alcohol? - 0 views

  • A recent study suggests that Tetris could actually help dieters reduce cravings
  • examine how the game can affect people's carvings
  • researchers created two study groups: One that played Tetris for three minutes while the other group was told that the game was loading but they never received the chance to play
  • ...6 more annotations...
  • participants were then asked to rate their cravings for cigarettes, food and alcohol based on the vividness, intrusiveness and strength of those cravings.
  • Tetris group showed a 24 percent reduction in cravings following their activity with the game
  • the other group who did not get to play Tetris did not experience any craving reductions.
  • "Ultimately, we are constantly looking for ways to stimulate cravings for healthy activities - such as exercise - but this a neutral activity that we have shown can have a positive impact."
  • "Feeling in control is an important part of staying motivated, and playing Tetris can potentially help the individual to stay in control when cravings strike
  • It is something a person can quickly access, for the most part whether they are at work or at home, and replaces the feeling of stress caused by the craving itself,"
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Science Retractions: Top 5 Withdrawn Studies Of 2012 - 0 views

  • Hyung-In Moon is a genius, says Hyung-In Moon
  • Korean scientist Hyung-In Moon took the concept of scientific peer review to a whole new level by reviewing his own papers under various fake names
  • Moon's research — which included a study on alcoholic liver disease and another on an anticancer plant substance — can't be trusted
  • ...33 more annotations...
  • admitted to falsifying data in some of his papers
  • , 35 of his papers have been retracted in 2012.
  • Peer review is a process in which scientific peers in the same field judge the merit of a submitted journal paper
  • editors at the Journal of Enzyme Inhibition and Medicinal Chemistry grew suspicious when four of his glowing reviews came back within 24 hours. Anyone who has ever submitted a paper for peer review knows that reviewers take weeks or months to reply
  • Math paper a big, fat zero
  • "In this study, a computer application was used to solve a mathematical problem"
  • Neither the one-sentence abstract
  • nor the co-author's e-mail address, ohm@budweiser.com
  • publishing this one-page gem entitled "A computer application in mathematics"
  • published in January 2010 but not retracted until April 2012, despite silly sentences such as "Computer magnification is a Universal computer phenomenon" and "This is a problematic problem."
  • retracted the paper because it "contains no scientific content." The editors chalked it up to "an administrative error
  • Maybe his failure doesn't feel better than success
  • The Dutch social psychologist Diederik Stapel
  • has found that,
  • failure sometimes feels better than success
  • The only problem is that his research appears to be either mostly or completely fabricated
  • work has appeared in top journals
  • his good looks and clever research topics made him a media darling
  • So far, 31 papers have been retracted
  • meat eaters are absolved: One of Stapel's studies, now suspected to be fabricated, found that meat eaters are more selfish and less social than vegetarians
  • Studies proposing a link between cellphone use and cancer often rely on weak statistics. This one just used fudged data
  • in 2008, scientists published a paper
  • stating that cellphones in standby mode lowered the sperm count and caused other adverse changes in the testicles of rabbits
  • although small and published in a rather obscure journal, made the news rounds.
  • In March 2012, the authors retracted the paper
  • the lead author didn't get permission from his two co-authors and, according to the retraction notice, there was a "lack of evidence to justify the accuracy of the data presented in the article."
  • Stem-cell cure for heart disease likely faked
  • biologist Shinya Yamanaka had just won the 2012 Nobel Prize for his discovery of induced pluripotent stem cells (iPS cells), which are adult cells that can be reprogrammed to their "embryonic" stage
  • claimed at a New York Stem Cell Foundation meeting in early October to have advanced this technology to cure a person with terminal heart failure
  • Two institutions listed as collaborating on Moriguchi's related papers
  • denied that any of Moriguchi's procedures took place there
  • origuchi has admitted only to making some "procedural" mistakes
  • He is sticking to his story, however, that one patient was cured … at a Boston hospital not yet named
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Storm Scents: It's True, You Can Smell Oncoming Summer Rain: Scientific American - 0 views

  • When people say they can smell a storm coming, they're right
  • Weather patterns produce distinctive odors that sensitive noses sniff out.
  • Before the rain begins, one of the first odors you may notice
  • ...13 more annotations...
  • is a sweet, pungent zing in your nostrils
  • fresh aroma of ozone
  • Petrichor
  • occurs when airborne molecules from decomposing plant or animal matter become attached to mineral or clay surfaces
  • when the rains came, the redolent combination of fatty acids, alcohols and hydrocarbons is released
  • Petrichor potpourri
  • Falling water disturbs and displaces odoriferous molecules on surfaces, particularly on dry ones, and carry them into the
  • happen to be near vegetation, these molecules may come from plants and trees
  • rise up from concrete and asphalt
  • Damp earth
  • After a storm has moved through
  • aroma of geosmin, a metabolic by-product of bacteria or blue-green algae
  • Microbiologist Keith Chater at the John Innes Center in England has proposed that geosmin's fragrance may be a beacon, helping camels find their way to desert oases
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Irish mathematicians explain why Guinness bubbles sink (w/ video) - 0 views

  • Simulations of the elongated vortices in (left) a pint glass, where bubbles sink near the glass wall, and (right) an anti-pint glass, where bubbles rise near the wal
  • Why do the bubbles in a glass of stout beer such as Guinness sink while the beer is settling, even though the bubbles are lighter than the surrounding liquid?
  • a team of mathematicians from the University of Limerick has shown that the sinking bubbles result from the shape of a pint glas
  • ...7 more annotations...
  • narrows downwards and causes a circulation pattern that drives both fluid and bubbles downwards at the wall of the glass
  • not just the bubbles themselves that are sinking (in fact, they're still trying to rise), but the entire fluid is sinking and pulling the bubbles down with it.
  • stout beers such as Guinness foam due to a combination of carbon dioxide and nitrogen bubbles, while other beers foam due only to carbon dioxide bubbles
  • nitrogen results in a less bitter taste, a creamy long-lasting head, and smaller bubbles that sink while the beer is settling.
  • researchers noted that they are still uncertain of the specific mechanism responsible for reducing the bubble density near the wall for the pint geometry and increasing it for the anti-pint one.
  • the same flow pattern occurs with other types of beers, but the larger carbon dioxide bubbles are less subject to the downward drag than the smaller nitrogen bubbles in stout beers.
  • a simple experiment can confirm the proposed explanation. If Guinness is poured into a tall cylindrical glass and the glass is tilted, bubbles move upwards near its upper surface and downwards near its lower surface. In this case, the upper surface acts like an anti-pint glass and the lower surface acts like a pint glass.
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