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Ions Control Shape of Nanofibers Grown on Clear Substrate

By Guest PostAugust 20, 2011Scienceacetylene, acetylene gas, ammonia gas, anatoli melechko, atoms, biomedical research tools, c2h2, carbon nanofibers, catalytic action, cfd research corporation, chromium grid, dale hensley, electrode, fused silicon, gene delivery tools, gene therapy, graphite, graphitic carbon nanofibers, hexagonal structure, ions, nanofiber coatings, nanofibers, nickel nanoparticles, north carolina state university, oak ridge national laboratory, positively charged atoms, pure silicon dioxide, ryan pearce, solar cells, transparent substrate, water repellent coatings

Researchers from North Carolina State University, the Oak Ridge National Laboratory and CFD Research Corporation have found a new way to develop straight carbon nanofibers on a transparent substrate. Growing such nanofiber coatings is important for use in novel biomedical research tools, solar cells, water repellent coatings and others. The technique utilizes a charged chromium grid, and relies on ions to ensure the nanofibers are straight, rather than curling – which limits their utility.

“This is the first time, that I know of, where someone has been able to grow straight carbon nanofibers on a clear substrate,” says Dr. Anatoli Melechko, an associate professor of materials science and engineering at NC State and co-author of a paper describing the research. “Such nanofibers can be used as gene-delivery tools. And a transparent substrate allows researchers to see how the nanofibers interact with cells, and to manipulate this interaction.” (more…)

Marcus Garvey Movement Owes Large Debt to Caribbean Expats, UCLA Historian Finds

By Guest PostAugust 20, 2011Culture, Politicsafrica for the africans, african americans, american race, back to africa movement, belize newspaper, black star line, british guiana, caribbean identity, caribbean movement, caribbean nationals, caribbean role, charismatic jamaica native, conventional wisdom, costa rica, duke university press, garvey movement and the caribbean, jamaica, marcus garvey, negroes, new york, political and cultural environment of the harlem renaissance, racial self help, robert a hill, the caribbean diaspora, united states, unity of the african diaspora, universal negro improvement association

Conventional wisdom has long held that Marcus Garvey’s Universal Negro Improvement Association, which advocated racial self-help and the unity of the African diaspora, grew out of the heady political and cultural environment of the Harlem Renaissance and benefited African Americans above all other black people. Any Caribbean role, according to this view, was separate and incidental to the primary legacy bequeathed to American race relations by the charismatic Jamaica native.

Now a UCLA historian argues the reverse in the first book of a multi-volume series on the Garvey movement and the Caribbean. From the UNIA’s organizational structure to its most valuable foot soldiers during its first half-decade, Garvey’s Caribbean links were indispensable to the movement’s success, and the region ultimately proved to be its most important theater, contends Robert A. Hill in “The Marcus Garvey and Universal Negro Improvement Association Papers: The Caribbean Diaspora 1910–1920.” (more…)

Microbial life on Mars: Could Saltwater Make it Possible?

By Guest PostAugust 19, 2011Scienceair pressure, antarctic lakes, atmospheres, bruce block, carbon dioxide, daily and seasonal cycles, earth, forms of microbial life, gregory dick, gulf of mexico, mars, Mars Phoenix Lander, mars today, microbe, microbial life, NASA, nilton renno, organisms, perchlorate salts, salt loving extremophile microorganisms, saltwater on mars, sea level, temperatures, the centro de astrobiologia in madrid, the university of georgia, united states, university of michigan, university of texas at dallas, water vapor

ANN ARBOR, Mich.— How common are droplets of saltwater on Mars? Could microbial life survive and reproduce in them? A new million-dollar NASA project led by the University of Michigan aims to answer those questions.

This project begins three years after beads of liquid brine were first photographed on one of the Mars Phoenix lander’s legs.

“On Earth, everywhere there’s liquid water, there is microbial life,” said Nilton Renno, a professor in the Department of Atmospheric, Oceanic and Space Sciences who is the principal investigator. Researchers from NASA, the University of Texas at Dallas, the University of Georgia and the Centro de Astrobiologia in Madrid are also involved. (more…)

‚Extreme Negative Anti-Smoking Ads Can Backfire’

By Guest PostAugust 19, 2011Healthanti smoking ads, anti tobacco, boomerang effect, smokers habits, threatening ads

MU researchers say disgusting and threatening ads can cause strong defense responses from viewers

COLUMBIA, Mo. – Health communicators have long searched for the most effective ways to convince smokers to quit. Now, University of Missouri researchers have found that using a combination of disturbing images and threatening messages to prevent smoking is not effective and could potentially cause an unexpected reaction. (more…)

Newspaper Sites across Europe Demonstrate Growth in the Past Year

By Guest PostAugust 18, 2011Technologyagoda, bild, booking, british daily mail, Comscore, european markets, european web property, Facebook, french newspapers, german newspaper, google sites, hürriyet, internet usage in europe, komsomolskaya pravda, le figaro, le monde, microsoft sites, milliyet, newspaper property in europe, nited kingdom, online, priceline, ria novosti, russia, russian social network, The Guardian, the netherlands, the new york times, tripadvisor sites, turkey, turkish newspapers, unique visitors, vkontakte

*comScore Releases Overview of European Internet Usage for June 2011*

LONDON, UK, 18 August 2011 – comScore, Inc., a leader in measuring the digital world, today released an overview of Internet usage in Europe, showing 368.6 million unique visitors went online in June 2011 for an average of 26.1 hours per person. This release highlights Internet usage in 49 European markets aggregated under the European region and provides individual reporting on 18 markets. Among the reportable markets, the Netherlands, United Kingdom, and Turkey continued to show the highest average engagement, with users from these markets spending an average of more than 31 hours online in the past month. (more…)

Romantic Sexual Relationships Deter Teenage Delinquency, New Study Shows

By Guest PostAugust 18, 2011Healthdating experiences, dating relationships, early intimacy, romantic relationships, sexually active, teenage, teens

AUSTIN, Texas — Sexually active teens in committed, romantic relationships are less likely to engage in delinquent behavior than teens who have casual sex, according to new research from psychologists at The University of Texas at Austin. (more…)

Researchers Discover Oldest Evidence of Nails in Modern Primates

By Guest PostAugust 18, 2011Naturefingernails, first modern primates, grammar of fashion, jonathan bloch, manicured nails, modern primates, primitive primate, teilhardina brandti, thermal maximum

GAINESVILLE, Fla. — From hot pink to traditional French and Lady Gaga’s sophisticated designs, manicured nails have become the grammar of fashion. (more…)

Mr. Fusion Helps Students Build a Nuclear Reactor

By Guest PostAugust 18, 2011Science, Technologyalbert babb, brian greene, carl greninger, farnsworth hirsch fusor, garage, glassification of nuclear waste, high end suv, iec 9000, jayce glenn, microsoft employee, microsoft it operations, microsoft research science fair, new york, nuclear reactor, physicist, physics, thermonuclear reactor, united states operates 104 nuclear reactors, voila fusion, x ray machine

*Microsoft employee Carl Greninger helped a team of young students build a working nuclear reactor in his garage. He hopes the project can inspire a passion for physics in students around the country.*

REDMOND, Wash. – Sometimes you have to smash a few atoms to excite people about science.

So says Carl Greninger, a program manager in Microsoft IT Operations by day and full-fledged physics fanatic by night. That’s why he decided to help some young students get hands-on experience with something they couldn’t find in their classrooms: a working thermonuclear reactor.

For the past year, a group of local students – some as young as 13 years old – have met at Greninger’s garage every Friday night to build a type of fusion reactor known as a Farnsworth–Hirsch Fusor. Dubbed IEC-9000, their machine has been fusing atoms and producing neutrons since May. It cost about as much as a high-end SUV, weighs 1,400 pounds, and generates temperatures hotter than the surface of the sun. (more…)

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