Wednesday, November 30, 2011

Violence, late ballots may mar critical Congo vote

Congolese president Joseph Kabila casts his ballot in the country's presidential election at a polling station in Kinshasa, Democratic Republic of Congo, Monday Nov. 28, 2011. Voting began Monday with delays and setbacks in this massive nation pummeled by war for an election that could further consolidate the country's peace or drag Congo back into conflict. (AP Photo/Jerome Delay)

Congolese president Joseph Kabila casts his ballot in the country's presidential election at a polling station in Kinshasa, Democratic Republic of Congo, Monday Nov. 28, 2011. Voting began Monday with delays and setbacks in this massive nation pummeled by war for an election that could further consolidate the country's peace or drag Congo back into conflict. (AP Photo/Jerome Delay)

Unable to read, Sabine Tunga, left, is being helped by election witness Roger Kipundu to fill the 30 pages long ballot for parliamentary elections at a Matonge neighborhood polling station in Kinshasa, Democratic Republic of Congo, Monday Nov. 28, 2011. Voting began Monday with delays and setbacks in this massive nation pummeled by war for an election that could further consolidate the country's peace or drag Congo back into conflict. (AP Photo/Jerome Delay)

Voters check for their names on lists at the Monseigneur Moke school polling station in the Matonge district in Kinshasa, Democratic Republic of Congo, Monday Nov. 28, 2011.Voting began Monday with delays and setbacks in this massive nation pummeled by war for an election that could further consolidate the country's peace or drag Congo back into conflict. (AP Photo/Jerome Delay)

Congolese president Joseph Kabila casts his ballot in the country's presidential election at a polling station in Kinshasa, Democratic Republic of Congo, Monday Nov. 28, 2011. Voting began Monday with delays and setbacks in this massive nation pummeled by war for an election that could further consolidate the country's peace or drag Congo back into conflict. (AP Photo/Jerome Delay)

Voters check for their names on lists at the Monseigneur Moke school polling station in the Matonge district in Kinshasa, Democratic Republic of Congo, Monday Nov. 28, 2011. Voting began Monday with delays and setbacks in this massive nation pummeled by war for an election that could further consolidate the country's peace or drag Congo back into conflict. (AP Photo/Jerome Delay)

(AP) ? Voting materials arrived late or sometimes not at all in precincts throughout the country Monday, but Congo's elections went ahead, raising doubts about the legitimacy of a poll that already has seen at least nine people killed and could drag sub-Saharan Africa's largest nation back into conflict.

Country experts and opposition leaders had urged the government to delay the vote due to massive logistical problems. Some districts of Congo, which has suffered decades of dictatorship and two civil wars, are so remote that ballot boxes had to be transported across muddy trails on the heads of porters, and by dugout canoe across churning rivers.

There are fears that the Central African nation, whose rain forests are still inhabited by rebel armies, could be plunged into violence again if it is unable to agree on the results of the presidential and legislative election.

Violence over the weekend left at least four people dead, and it continued Monday when gunmen opened fire on a truck transporting ballots in the southeastern town of Lubumbashi. That and a subsequent attack by unidentified assailants left five more dead, according to Dikanga Kazadi, the provincial interior minister. In the capital, police fired tear gas to break up a crowd that had amassed outside a voting bureau.

In pockets throughout the country, voting centers were forced to open late, and some didn't open at all as they waited for trucks ferrying the necessary forms and equipment.

At dawn ? in polling station No. 10048 in a Catholic school in the capital ? a poll worker cut the orange police tape at the door to signal the start of voting. At polling station No. 10053 in the same school, election officials could not open because the ink used to mark the index fingers of voters had not been delivered.

"We can't start like this. We're not even properly dressed," said Baudouin Lusagila, the head of the polling station, whose team also lacked the signature blue vests printed with the electoral commission's logo. "Of course I'm worried. There is too much improvisation. Too many delays."

The vote is the second since the end of Congo's last war and the first to be organized by the government instead of the international community. There were delays at every step in the preparation. The ballots were only printed in neighboring South Africa two weeks ago ? not enough time to deliver them to the remote corners of a nation the size of Western Europe where less than 2 percent of the roads are paved.

Late Monday, election commission spokesman Matthieu Mpita announced that polling stations that had not yet received the necessary materials would be allowed to stay open until they did.

The government is in a hurry to hold the vote because incumbent President Joseph Kabila's term expires in the first week of December. If a new president is not elected by then, analysts say the country could slide into a situation of unconstitutional power ? a scenario that could provoke further unrest.

At polling stations that opened on time in the capital, lines were small and several were empty due to torrential rain. Inside the Gombe secondary school where Kabila cast his ballot, the women lined up after him were wearing shower caps. Kabila urged citizens to go to the polls and warned of what was at stake.

"Our country, the Democratic Republic of Congo has come a long way, from a situation of war, and of all manner of conflict whose end result was suffering," Kabila said on state television on the eve of the election. "Let us be careful not to return to where we have come from. By participating in the vote ... we are guaranteeing the stability and the future of our country."

In the eastern city of Goma, Cindy McCain, the wife of United States Sen. John McCain, is leading a delegation of poll watchers. She said that in one polling station, they found ballot boxes were already a third full when they arrived at dawn.

There were also unconfirmed reports of full boxes being found in Kasai Occidental province, and of voting officials refusing to show witnesses that boxes were empty before voting began in the locality of Mbandaka.

In Washington, State Department spokesman Mark Toner said the U.S. was concerned by reports of "anomalies" in Congo's vote. Asked if the election was credible, Toner said the U.S. would reserve judgment until the final results are out.

Among the logistical challenges is the staggering number of candidates (18,385) competing for the 500 seats in parliament. Posters of candidates featured their number on the ballot, which is as thick as a major newspaper's weekend supplement. A third of Congolese adults can't read, a rate that is even higher among women. Many were showing up with slips of paper filled in by relatives stating the number of their candidate of choice.

Even that didn't help Celine Madiata, first in line to vote at the polling station inside a Catholic college in the capital. She stepped behind the cardboard voting screen, and opened the voluminous ballot paper, carefully scrolling down.

It took her several minutes to recognize the No. 50, which she circled. "I voted for Bala Basu," she said.

Candidate No. 50, however, is not Bala Basu. It's a politician named Rubenga Kamanda. Country watchers worry that mistakes like Madiata's are being repeated throughout the country and could delegitimize the election in the eyes of the population.

"It's like leading an animal to the slaughterhouse. It doesn't realize until it gets there what is in store for it," said Jerome Bonso, coordinator of the Coalition for Peaceful and Transparent Elections. "They led us into this election. The population was not prepared for it. And now there is a real risk of conflict when the results come out."

It's unclear if the lateness observed in voting centers nationwide will affect the outcome of the vote, but it added to a cloud of uncertainty. Because the opposition is split with 10 candidates vying to unseat the 40-year-old Kabila, most analysts expect him to win.

That will come as an especially hard blow in Kinshasa, where his popularity has hit rock bottom due to the spiraling cost of basic goods and worsening poverty. Billboards showing the youthful president have been defaced, tarred with mud.

Kabila was first thrust into the position of president a decade ago, after the assassination of his father, Laurent Kabila, the rebel leader who toppled the country's dictator of 32 years, Mobutu Sese Seko.

The younger Kabila initially benefited from his father's aura, who was credited with ridding the country of Mobutu, a man known for chartering the Concorde for personal trips and sipping pink champagne while his population languished in abject poverty.

People celebrated when the ruler's family was forced to run onto a cargo plane to escape, the first lady still wearing her nightgown. But a campaign poster for Mobutu's son ? Francois Mobutu, who is one of the 11 presidential candidates ? underlines how much the younger Kabila's popularity has dipped.

"Mobutu was there for 32 years. He pillaged the country. But are we any better off now? The Democratic Republic of Congo has manganese, cobalt, coltan, oil, diamonds," said 45-year-old Ndukis Mubiala, a taxi driver who is voting for the ex-dictator's son. "I'm a chauffeur. I don't own a house. In my bank account, there's zero. Like before, 10 percent of the population gets everything, 90 percent gets nothing."

___

Associated Press writer Saleh Mwanamilongo in Kinshasa, Congo, and Bradley Klapper in Washington contributed to this report.

Associated Press

Source: http://hosted2.ap.org/APDEFAULT/cae69a7523db45408eeb2b3a98c0c9c5/Article_2011-11-28-AF-Congo-Election/id-7c615abf700241b190f1bd2cd8a8117f

storage wars millionaire matchmaker millionaire matchmaker shawshank redemption 3 10 to yuma lsu football lsu football

Xbox 360 To Stream 26 Verizon FiOS Channels For Subscribers (Digital Trends)

xbox-360-fall-2011-dashboard

Baby steps. Try to keep that in mind as you read the following news. Verizon will soon start streaming 26 channels from its FiOS fiber-optic cable/phone/Internet service to Xbox 360 consoles. There?s a catch though: in order to take advantage of the feature, you?ll need to have an Xbox Live Gold subscription AND a FiOS account for cable TV and Internet. Sure, it doesn?t make a whole lot of sense since most will probably have their Microsoft game console connected to the same TV that receives FiOS cable TV. But hey, it?s a start.

No additional hardware is required to take advantage of the added feature so long as you meet the other criteria, the press release confirms. Xbox 360 users with a Kinect hooked up to their console will be able to use voice and gesture commands to explore the FiOS content, though there?s no info offered on how involved those Kinect features will be.

The intent is to eventually expand on the 26 available cable channels, though the press release notes that channel availability even at the beginning will depend on the customer?s TV package. There?s no list of which channels will be available, but it sounds like at least a few of them will be pulled from the service?s premium cable offering.

No launch date is mentioned for the expanded functionality, though ?soon? is a logical assumption to make. Perhaps even as soon as the forthcoming Xbox 360 firmware update, which introduces a Metro-style dashboard on the console and enhances the level of Kinect functionality, among other things.

Verizon will be looking to lure new customers in with a Triple Play promotion that offers up cable, phone and Internet service for $89.99 per month (with a two-year commitment). In addition, new subscribers will receive a complimentary one-year Xbox Live Gold subscription and a copy of the recently released Halo: Combat Evolved Anniversary. Incoming customers will be able to take advantage of the promotion until January 21.

This article was originally posted on Digital Trends

More from Digital Trends

Microsoft designing custom version of Silverlight for Xbox dashboard update

Xbox 360 dashboard update adds 50 new web streaming and cable TV partners

Xbox LIVE dashboard upgrade leaks

Microsoft pays tribute to Star Wars with limited edition Xbox 360

Source: http://us.rd.yahoo.com/dailynews/rss/personaltech/*http%3A//news.yahoo.com/s/digitaltrends/20111129/tc_digitaltrends/xbox360tostream26verizonfioschannelsforsubscribers

frank gore frank miller 60 minutes duggar family oobleck justin timberlake marine corps ball frank gore injury

Worlds first elasticated USB cables invent bungee jumpering (video)

Recall those stretchy transistors and bendy silicon circuits? Now you can plumb them together with these Roboden elasticated cables. Asahi Kasei corporation came up with the idea while trying to create cords flexible enough to power up humanoid robots. Thanks to its work with Spandex, the company knew human skin can stretch by a factor of 1.5, and a cable with similar properties would be ideal for juicing up them 'droids. USB leads are planned, among other types, meaning you could make it all the way to the fridge in your heated slippers without unplugging. Check out the video below and you'll see why we're already designing next year's Tron costume for Halloween.

Continue reading Worlds first elasticated USB cables invent bungee jumpering (video)

Worlds first elasticated USB cables invent bungee jumpering (video) originally appeared on Engadget on Wed, 30 Nov 2011 10:09:00 EDT. Please see our terms for use of feeds.

Permalink Diginfo  |  sourceAsahi Kasei Fibers  | Email this | Comments

Source: http://www.engadget.com/2011/11/30/worlds-first-elasticated-usb-cables-invent-bungee-jumpering-vid/

49ers best buy black friday bath and body works coupons frys ad a very gaga thanksgiving black friday walmart 2011 colt mccoy

iFixit's Galaxy Nexus Teardown Reveals a Dirty NFC Secret [Android]

The axe-wielding maniacs over at iFixit are tearing Samsung's Galaxy Nexus limb from limb! O, the humanity! If you've been eager to see what makes Google's new flagship beast tick, here's your photographic anatomy lesson. More »


Source: http://feeds.gawker.com/~r/gizmodo/full/~3/g0HCWrSOX2s/ifixits-galaxy-nexus-teardown-reveals-a-dirty-nfc-secret

pabst blue ribbon mac miller omarion gabby gabby marcel the shell with shoes on ecu

China 'keen' to invest in West's infrastructure (AP)

BEIJING ? China's sovereign wealth fund wants to invest in improving neglected U.S. and European roads and other infrastructure to spur global growth, the fund's chairman said in comments published Monday.

The announcement reflects a shift in strategy for the $410 billion fund, which was created in 2007. Until now, it has limited its investments mostly to small stakes in publicly traded companies to avoid stirring political opposition overseas.

China Investment Corp. wants to begin in Britain by teaming up with fund managers or investing directly in infrastructure projects, Lou Jiwei said in a commentary in London's Financial Times newspaper.

"China is keen to get involved" in improving U.S. and European infrastructure, which "badly needs more investment," Lou wrote. He cited energy, water, transport, digital communications and waste disposal but gave no indication of possible projects or the size of Chinese investment.

Some commentators in both Europe and China have suggested Beijing might use its $3.2 trillion in foreign reserves to gain leverage on political or trade issues at a time when other governments urgently want investment.

Also Monday, Commerce Minister Chen Deming said at a business conference that he wants to send a delegation to Europe next year to find investment opportunities, according to the director of the ministry press office, Huang Minghai. The proposal still requires Cabinet approval.

Beijing is encouraging Chinese companies to expand investments abroad to diversify an economy that relies heavily on exports and investment. It has sent trade and investment delegations in the past to the United States, Europe and elsewhere.

CIC was created to invest abroad in hopes of earning a better return on China's foreign reserves, the bulk of which are in U.S. and European government bonds. It says investments are made on commercial rather than political grounds.

The move into infrastructure probably reflects CIC's commercial views, rather than those of the government, said Citigroup economist Minggao Shen. He said it could help CIC earn a more stable profit and reduce Beijing's exposure to U.S. and European government bonds amid volatile markets.

Some Chinese commentators have called for Beijing to reduce its exposure to the financial woes of Western governments by buying fewer bonds. China is Washington's biggest foreign bondholder, with $1.15 trillion in Treasury debt as of September.

"There is a general thought that maybe China should not invest in U.S. Treasurys or European sovereign bonds. Instead, why can't we hold direct assets in the economy?" Shen said.

By investing in individual projects, he said, "you don't have to depend on government guarantees and it should be affected less by the sovereign debt crisis."

CIC faced criticism over the performance of investments made just as the financial crisis was developing. But its results have improved and the fund reported an 11.7 percent return on assets last year.

Lou stressed that CIC is a commercial investor and wants to make a profit.

"CIC believes that such an investment, guided by commercial principles, offers the chance of a win-win solution for all," he wrote.

Lou gave no indication in which other countries the CIC might invest but cited an estimate that the United States needs to spend at least $2.2 trillion in infrastructure repairs or rebuilding.

"Free of the inflationary pressure that afflicts many emerging economies, the U.S. and Europe should make substantial investment," he said. "We cannot count on developing countries to deliver a stable economic recovery on their own."

___

AP researcher Yu Bing contributed.

___

Online:

China Investment Corp.: http://www.china-inv.cn

Source: http://us.rd.yahoo.com/dailynews/rss/asia/*http%3A//news.yahoo.com/s/ap/20111128/ap_on_bi_ge/as_china_us_europe_investment

chris christie cnet tampa bay rays netanyahu chris paul tori spelling

Singer Charlotte Church: Press destroyed my career (AP)

LONDON ? Singer Charlotte Church told Britain's media ethics inquiry that persistent press lies about her had blown her credibility "to bits" and badly damaged her career.

She also said Monday that press intrusion had a devastating impact on her family life and particularly on her mother, who she said had tried to kill herself in part because she knew a newspaper article would detail her husband's extramarital affair.

The former teenage singing sensation described how cameramen tried to take photos up her skirt and down her blouse and published "intimate" details about her sex life when she was just 17.

"I couldn't get my head around that," said Church, 25, who blamed tabloid phone hacking for much of her lost privacy.

"I've been made a caricature for so long, and this person portrayed in the tabloids really isn't me," she told the committee in calm, measured tones. "It's not the person I am, and it's had a massive impact on my career. As an artist, I find it hard to be taken seriously because my credibility has been blown to bits."

Church, a pop and opera singer with a spectacular voice, was the latest prominent person to tell the committee how Britain's voracious and unscrupulous press has invaded their privacy and damaged their lives. She said she suspected her closest family members of leaking secrets when in fact the media were getting them from illegal phone hacking.

Prime Minister David Cameron set up the inquiry amid a still-unfolding scandal over illegal eavesdropping by the News of the World tabloid. Owner Rupert Murdoch closed down the newspaper in July after evidence emerged that it had illegally accessed the mobile phone voice mails of celebrities, politicians and even crime victims in its search for scoops.

More than a dozen News of the World journalists and editors have been arrested, and the scandal has also claimed the jobs of two top London police officers, Cameron's media adviser and several senior Murdoch executives.

The inquiry, led by Judge Brian Leveson, plans to issue a report next year and could recommend major changes to Britain's system of media self regulation.

Before Church testified, a man who had been arrested on murder charges and then cleared told the committee that tabloids had destroyed his reputation with false Page One stories.

Christopher Jefferies said the negative coverage of him was so widespread that some people still assume he is a "weird character" who should be avoided even though he was cleared of wrongdoing.

He was arrested last year by police investigating the murder of his tenant, Joanna Yeates. Another man has since been convicted of the crime.

Jefferies said he felt he could not go out in public because of the smears.

Last week, Harry Potter author J.K. Rowling, Hugh Grant and Sienna Miller all testified about the devastating impact that unscrupulous British media have had on their lives, along with the parents of murdered 13-year-old Milly Dowler and missing 3-year-old Madeleine McCann.

Source: http://us.rd.yahoo.com/dailynews/rss/music/*http%3A//news.yahoo.com/s/ap/20111128/ap_en_mu/eu_britain_phone_hacking

heisman the firm sleep no more cyber monday deals war eagle war eagle pawn stars

Tuesday, November 29, 2011

Daily App Deals: Get Photoshop CS5 Extended Student & Teacher Edition for 85% Off in Today's App Deals [Deals]

Daily App Deals: Get Photoshop CS5 Extended Student & Teacher Edition for 85% Off in Today's App DealsThe Daily App Deals post is a round-up of the best app discounts of the day, as well as some notable mentions for ones that are on sale.

The Best

Daily App Deals: Get Photoshop CS5 Extended Student & Teacher Edition for 85% Off in Today's App DealsPhotoshop CS5 Extended Student & Teacher Edition (Amazon Appstore) Previously $999.00, now $149.99 + free shipping (US Only). Photoshop CS5 Extended Student & Teacher Edition for PC allows users to handle traditional image editing for print, web, and video. The software also allows users to create and edit 3D and motion-based content and more. Get it for $149.99. (via Dealnews)

Free

iOS

  • USB Stick | iTunes via 148Apps | Previously $1.99
  • Push Notifications | iTunes via AppShopper | Previously $9.99
  • Recipes Genius | iTunes via AppShopper | Previously 99?
  • Photo To PDF | iTunes via AppShopper | Previously $1.99
  • Keychain | iTunes via AppShopper | Previously 99?
  • TimeBite | iTunes via Dealzon | Previously $1.99
  • Windows

  • Trend Micro Internet Security | Newegg via Dealnews | Previously $69.99, now Free + free shipping with mail-in rebate
  • Ashampoo Photo Commander 8 (after download - choose English install) | ComputerBild.de via Dealnews | Previously $39.99
  • The Rest

    iOS

  • Sight Reading Trainer Bass | iTunes via 148Apps | Previously $2.99, now 99?
  • PocketLoan | iTunes via 148Apps | Previously $1.99, now 99?
  • Write 2 | iTunes via AppShopper | Previously $1.99, now 99?
  • 2Do: Tasks Done in Style | iTunes via AppShopper | Previously $6.99, now $2.99
  • LogMeIn Ignition | iTunes via Dealnews | Previously $29.99, now $14.99
  • Android

  • Photography Calculator | Amazon Appstore | Previously $2.99, now $1.49
  • MoneyWise Pro | Amazon Appstore | Previously $6.98, now $3.99
  • SeekDroid | Amazon Appstore | Previously $4.99, now $2.99
  • Droid Scan Pro | Amazon Appstore | Previously $4.99, now $2.99
  • LogMeIn Ignition | Android Market via Dealnews | Previously $29.99, now $14.99

Source: http://feeds.gawker.com/~r/lifehacker/full/~3/0q4GnJUzEL0/daily-app-deals-get-photoshop-cs5-extended-student--teacher-edition-for-85-in-todays-app-deals

graham spanier graham spanier penn state board of trustees joe pa joe pa brett ratner jerry sandusky

Making a light-harvesting antenna from scratch

Making a light-harvesting antenna from scratch [ Back to EurekAlert! ] Public release date: 29-Nov-2011
[ | E-mail | Share Share ]

Contact: Diana Lutz
dlutz@wustl.edu
314-935-5272
Washington University in St. Louis

A biomimetic antenna for gathering sunlight may one day transform solar-powered devices

Sometimes when people talk about solar energy, they tacitly assume that we're stuck with some version of the silicon solar cell and its technical and cost limitations.

Not so.

The invention of the solar cell, in 1941, was inspired by a newfound understanding of semiconductors, materials that can use light energy to create mobile electrons -- and ultimately an electrical current.

Silicon solar cells have almost nothing to do with the biological photosystems in tree leaves and pond scum that use light energy to push electrons across a membrane -- and ultimately create sugars and other organic molecules.

At the time, nobody understood these complex assemblages of proteins and pigments well enough to exploit their secrets for the design of solar cells.

But things have changed.

At Washington University in St. Louis's Photosynthetic Antenna Research Center (PARC) scientists are exploring native biological photosystems, building hybrids that combine natural and synthetic parts, and building fully synthetic analogs of natural systems.

One team has just succeeded in making a crucial photosystem component -- a light-harvesting antenna -- from scratch. The new antenna is modeled on the chlorosome found in green bacteria.

Chlorosomes are giant assemblies of pigment molecules. Perhaps Nature's most spectacular light-harvesting antennae, they allow green bacteria to photosynthesize even in the dim light in ocean deeps.

Dewey Holten, PhD, professor of chemistry in Arts & Sciences, ard collaborator Christine Kirmaier, PhD, research professor of chemistry are part of a team that is trying to make synthetic chlorosomes. Holten and Kirmaier use ultra-fast laser spectroscopy and other analytic techniques to follow the rapid-fire energy transfers in photosynthesis.

His team's latest results, described in a recent issue of New Journal of Chemistry, were highlighted in the editor's blog.

Chlorosomes

Biological systems that capture the energy in sunlight and convert it to the energy of chemical bonds come in many varieties, but they all have two basic parts: the light harvesting complexes, or antennae, and the reaction center complexes. The antennae consist of many pigment molecules that absorb photons and pass the excitation energy to the reaction centers.

In the reaction centers, the excitation energy sets off a chain of reactions that create ATP, a molecule often called the energy currency of the cell because the energy stored ATP powers most cellular work. Cellular organelles selectively break those bonds in ATP molecules when they need an energy hit for cellular work.

Green bacteria, which live in the lower layers of ponds, lakes and marine environments, and in the surface layers of sediments, have evolved large and efficient light-harvesting antennae very different from those found in plants bathing in sunlight on Earth's surface.

The antennae consist of highly organized three-dimensional systems of as many as 250,000 pigment molecules that absorb light and funnel the light energy through a pigment/protein complex called a baseplate to a reaction center, where it triggers chemical reactions that ultimately produce ATP.

In plants and algae (and in the baseplate in the green bacteria) photo pigments are bound to protein scaffolds, which space and orient the pigment molecules in such a way that energy is efficiently transferred between them.

But chlorosomes don't have a protein scaffold. Instead the pigment molecules self -assemble into a structure that supports the rapid migration of excitation energy.

This is intriguing because it suggests chlorosome mimics might be easier to incorporate in the design of solar devices than biomimetics that are made of proteins as well as pigments.

Synthetic pigments

The goal of the work described in the latest journal article was to see whether synthesized pigment molecules could be induced to self-assemble. The process by which the pigments align and bond is not well understood.

"The structure of the pigment assemblies in chlorosomes is the subject of intense debate," Holten says, "and there are several competing models for it."

Given this uncertainty, the scientists wanted to study many variations of a pigment molecule to see what favored and what blocked assembly.

A chemist wishing to design pigments that mimic those found in photosynthetic organisms first builds one of three molecular frameworks. All three are macrocycles, or giant rings: porphyrin, chlorin and bacteriochlorin.

"One of the members of our team, Jon Lindsey can synthesize analogs of all three pigment types from scratch," says Holten. (Lindsey, PhD, is Glaxo Professor of Chemistry at North Carolina State University.)

In the past, chemists making photo pigments have usually started with porphyrins, which are the easiest of the three types of macrocycles to synthesize. But Lindsey also has developed the means to synthesize chlorins, the basis for the pigments found in the chlorosomes of green bacteria. The chlorins push the absorption to the red end of the visible spectrum, an area of the spectrum scientists would like to be able to harvest for energy.

Key to pigment self-assembly are the metal atoms and hydroxyl (OH) and carbonyl (C=O) groups in the pigment molecules.

Doctoral student Olga Mass and coworkers in Lindsey's lab synthesized 30 different chlorins, systematically adding or removing chemical groups thought to be important for self-assembly but also attaching peripheral chemical groups that take up space and might make it harder for the molecules to stack or that shift around the distributions of electrons so that the molecules might stack more easily.

Testing for aggregation

The powdered pigments were carefully packaged and shipped by Fed Ex (because the Post Office won't ship chemicals) to Holten's lab at WUSTL and to David Bocian's lab at the University of California at Riverside.

Scientists in both labs made up green-tinctured solutions of each of the 30 molecules in small test tubes and then poked and prodded the solutions by means of analytical techniques to see whether the pigment had aggregated and, if so, how much had formed the assemblies.

Holten's lab studied their absorption of light and their fluorescence (which indicated the presence of monomers, since assemblies don't normally fluoresce) and Bocian's lab studied their vibrational properties, which are determined by the network of bonds in the molecule or pigment aggregate as a whole.

In one crucial test Joseph Springer, a PhD student in Holten's lab, compared the absorption spectrum of a pigment in a polar solvent that would prevent it from self-assembling to the spectrum of the pigment in a nonpolar solvent that would allow the molecules to interact with one another and form assemblies.

"You can see them aggregate," Springer says. "A pigment that is totally in solution is clear, but colored a brilliant green. When it aggregates, the solution becomes a duller green and you can see tiny flecks in the liquid."

The absorption spectra indicated that some pigments formed extensive assemblies and that the steric and electronic properties of the molecules predicted the degree to which they would assemble.

Up next

Although this project focused on self-assembly, the PARC scientists already have taken the next step toward a practical solar device.

"With Pratim Biswas, PhD, the Lucy and Stanley Lopata Professor and chair of the Department of Energy, Environmental & Chemical Engineering, we've since demonstrated that we can get the pigments to self-assemble on surfaces, which is the next step in using them to design solar devices," says Holten.

"We're not trying to make a more efficient solar cell in the next six months," Holten cautions. "Our goal instead is to develop fundamental understanding so that we can enable the next generation of more efficient solar powered devices."

Biomimicry hasn't always worked. Engineers often point out early flying machines that attempted to mimic birds didn't work and that flying machines stayed aloft only when nventors abandoned biological models and came up with their own designs.

But there is nothing predestined or inevitable about this. As biological knowledge has exploded in the past 50 years, mimicking nature has become a smarter strategy. Biomimetic or biohybrid designs already have solved significant engineering problems in other areas and promise to greatly improve the design of solar powered devices as well.

After all, Nature has had billions of years to experiment with ways to harness the energy in sunlight for useful work.

###



[ Back to EurekAlert! ] [ | E-mail | Share Share ]

?


AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert! system.


Making a light-harvesting antenna from scratch [ Back to EurekAlert! ] Public release date: 29-Nov-2011
[ | E-mail | Share Share ]

Contact: Diana Lutz
dlutz@wustl.edu
314-935-5272
Washington University in St. Louis

A biomimetic antenna for gathering sunlight may one day transform solar-powered devices

Sometimes when people talk about solar energy, they tacitly assume that we're stuck with some version of the silicon solar cell and its technical and cost limitations.

Not so.

The invention of the solar cell, in 1941, was inspired by a newfound understanding of semiconductors, materials that can use light energy to create mobile electrons -- and ultimately an electrical current.

Silicon solar cells have almost nothing to do with the biological photosystems in tree leaves and pond scum that use light energy to push electrons across a membrane -- and ultimately create sugars and other organic molecules.

At the time, nobody understood these complex assemblages of proteins and pigments well enough to exploit their secrets for the design of solar cells.

But things have changed.

At Washington University in St. Louis's Photosynthetic Antenna Research Center (PARC) scientists are exploring native biological photosystems, building hybrids that combine natural and synthetic parts, and building fully synthetic analogs of natural systems.

One team has just succeeded in making a crucial photosystem component -- a light-harvesting antenna -- from scratch. The new antenna is modeled on the chlorosome found in green bacteria.

Chlorosomes are giant assemblies of pigment molecules. Perhaps Nature's most spectacular light-harvesting antennae, they allow green bacteria to photosynthesize even in the dim light in ocean deeps.

Dewey Holten, PhD, professor of chemistry in Arts & Sciences, ard collaborator Christine Kirmaier, PhD, research professor of chemistry are part of a team that is trying to make synthetic chlorosomes. Holten and Kirmaier use ultra-fast laser spectroscopy and other analytic techniques to follow the rapid-fire energy transfers in photosynthesis.

His team's latest results, described in a recent issue of New Journal of Chemistry, were highlighted in the editor's blog.

Chlorosomes

Biological systems that capture the energy in sunlight and convert it to the energy of chemical bonds come in many varieties, but they all have two basic parts: the light harvesting complexes, or antennae, and the reaction center complexes. The antennae consist of many pigment molecules that absorb photons and pass the excitation energy to the reaction centers.

In the reaction centers, the excitation energy sets off a chain of reactions that create ATP, a molecule often called the energy currency of the cell because the energy stored ATP powers most cellular work. Cellular organelles selectively break those bonds in ATP molecules when they need an energy hit for cellular work.

Green bacteria, which live in the lower layers of ponds, lakes and marine environments, and in the surface layers of sediments, have evolved large and efficient light-harvesting antennae very different from those found in plants bathing in sunlight on Earth's surface.

The antennae consist of highly organized three-dimensional systems of as many as 250,000 pigment molecules that absorb light and funnel the light energy through a pigment/protein complex called a baseplate to a reaction center, where it triggers chemical reactions that ultimately produce ATP.

In plants and algae (and in the baseplate in the green bacteria) photo pigments are bound to protein scaffolds, which space and orient the pigment molecules in such a way that energy is efficiently transferred between them.

But chlorosomes don't have a protein scaffold. Instead the pigment molecules self -assemble into a structure that supports the rapid migration of excitation energy.

This is intriguing because it suggests chlorosome mimics might be easier to incorporate in the design of solar devices than biomimetics that are made of proteins as well as pigments.

Synthetic pigments

The goal of the work described in the latest journal article was to see whether synthesized pigment molecules could be induced to self-assemble. The process by which the pigments align and bond is not well understood.

"The structure of the pigment assemblies in chlorosomes is the subject of intense debate," Holten says, "and there are several competing models for it."

Given this uncertainty, the scientists wanted to study many variations of a pigment molecule to see what favored and what blocked assembly.

A chemist wishing to design pigments that mimic those found in photosynthetic organisms first builds one of three molecular frameworks. All three are macrocycles, or giant rings: porphyrin, chlorin and bacteriochlorin.

"One of the members of our team, Jon Lindsey can synthesize analogs of all three pigment types from scratch," says Holten. (Lindsey, PhD, is Glaxo Professor of Chemistry at North Carolina State University.)

In the past, chemists making photo pigments have usually started with porphyrins, which are the easiest of the three types of macrocycles to synthesize. But Lindsey also has developed the means to synthesize chlorins, the basis for the pigments found in the chlorosomes of green bacteria. The chlorins push the absorption to the red end of the visible spectrum, an area of the spectrum scientists would like to be able to harvest for energy.

Key to pigment self-assembly are the metal atoms and hydroxyl (OH) and carbonyl (C=O) groups in the pigment molecules.

Doctoral student Olga Mass and coworkers in Lindsey's lab synthesized 30 different chlorins, systematically adding or removing chemical groups thought to be important for self-assembly but also attaching peripheral chemical groups that take up space and might make it harder for the molecules to stack or that shift around the distributions of electrons so that the molecules might stack more easily.

Testing for aggregation

The powdered pigments were carefully packaged and shipped by Fed Ex (because the Post Office won't ship chemicals) to Holten's lab at WUSTL and to David Bocian's lab at the University of California at Riverside.

Scientists in both labs made up green-tinctured solutions of each of the 30 molecules in small test tubes and then poked and prodded the solutions by means of analytical techniques to see whether the pigment had aggregated and, if so, how much had formed the assemblies.

Holten's lab studied their absorption of light and their fluorescence (which indicated the presence of monomers, since assemblies don't normally fluoresce) and Bocian's lab studied their vibrational properties, which are determined by the network of bonds in the molecule or pigment aggregate as a whole.

In one crucial test Joseph Springer, a PhD student in Holten's lab, compared the absorption spectrum of a pigment in a polar solvent that would prevent it from self-assembling to the spectrum of the pigment in a nonpolar solvent that would allow the molecules to interact with one another and form assemblies.

"You can see them aggregate," Springer says. "A pigment that is totally in solution is clear, but colored a brilliant green. When it aggregates, the solution becomes a duller green and you can see tiny flecks in the liquid."

The absorption spectra indicated that some pigments formed extensive assemblies and that the steric and electronic properties of the molecules predicted the degree to which they would assemble.

Up next

Although this project focused on self-assembly, the PARC scientists already have taken the next step toward a practical solar device.

"With Pratim Biswas, PhD, the Lucy and Stanley Lopata Professor and chair of the Department of Energy, Environmental & Chemical Engineering, we've since demonstrated that we can get the pigments to self-assemble on surfaces, which is the next step in using them to design solar devices," says Holten.

"We're not trying to make a more efficient solar cell in the next six months," Holten cautions. "Our goal instead is to develop fundamental understanding so that we can enable the next generation of more efficient solar powered devices."

Biomimicry hasn't always worked. Engineers often point out early flying machines that attempted to mimic birds didn't work and that flying machines stayed aloft only when nventors abandoned biological models and came up with their own designs.

But there is nothing predestined or inevitable about this. As biological knowledge has exploded in the past 50 years, mimicking nature has become a smarter strategy. Biomimetic or biohybrid designs already have solved significant engineering problems in other areas and promise to greatly improve the design of solar powered devices as well.

After all, Nature has had billions of years to experiment with ways to harness the energy in sunlight for useful work.

###



[ Back to EurekAlert! ] [ | E-mail | Share Share ]

?


AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert! system.


Source: http://www.eurekalert.org/pub_releases/2011-11/wuis-mal112911.php

brandon mcinerney black friday 2011 deals nfl power rankings week 12 nfl power rankings week 12 brine turkey brine turkey uc davis

Video: Consumer spending helps stocks bounce back



>>> we turn now to wall street where stocks bounced back big from the worst thanksgiving week, by the way, since the great depression. the dow was up 291 points. nasdaq was up big. s&p 500 up just under 34 points. what appears to be a busy start to the christmas shopping season appears to have helped drive the gains today. according to black friday estimates -- estimates from retail trade groups -- $52 billion was spent by 226 million of us who spent an average of $400 each, we're told. again, these are numbers based on surveys and they could change when we get the actual retail sales figures next

Source: http://video.msnbc.msn.com/nightly-news/45469641/

giuliana and bill 2012 camry endometriosis 9 9 9 plan 9 9 9 plan last house on the left last house on the left

'Amateur' Astronomer Snaps Pic of Planet-Forming Disk

I mean, if he really isn't an 'amateur,' then maybe he should have been referred to as a 'professional' astronomer (sans quotes)?

Oh wait...the Bad Astronomer makes an error that's common to the rest of the population: He believes 'amateur' means "one lacking in experience and competence in an art or science." In fact, in this context 'amateur' means "not compensated," "not for hire," or "one who engages in a pursuit, study, science, or sport as a pastime rather than as a profession."

Perhaps the/. editors could help fight this common misunderstanding by dropping the superfluous quotes. It's too bad the grandeur of Rolf's contribution to science is sullied by other's ignorance. How many of you all thought to yourselves "Why the hell is 'amateur' in quotes?" C'mon...I know you did.

Source: http://rss.slashdot.org/~r/Slashdot/slashdotScience/~3/webfbm8mg0w/amateur-astronomer-snaps-pic-of-planet-forming-disk

badgers badgers the killing fields the killing fields texas killing fields burzynski pete seeger

Tuskegee Airman exhibit gets new home at GA museum (Providence Journal)

Share With Friends: Share on FacebookTweet ThisPost to Google-BuzzSend on GmailPost to Linked-InSubscribe to This Feed | Rss To Twitter | Politics - Top Stories News, News Feeds and News via Feedzilla.

Source: http://news.feedzilla.com/en_us/stories/politics/top-stories/167236283?client_source=feed&format=rss

mars rover mars rover trent richardson apple cup jewelry stores heisman the firm

Monday, November 28, 2011

US student says he was beaten after Cairo arrest (AP)

Forced to lie still for hours in the dark, the American students held during protests in Egypt were told they would be shot if they moved or made any noise, one of them said Sunday on his first full day home.

"It was the most frightening experience of my life, I believe," Derrik Sweeney said.

Speaking to The Associated Press by Skype from Jefferson City, Mo., Sweeney said the evening of Nov. 20 started peacefully in Cairo, with Tahrir Square "abuzz with ideas of democracy and freedom."

The three wandered the streets and wound up in a large group of protesters outside the Interior Ministory, Sweeney said. The demonstrations escalated, with the protesters yelling and perhaps throwing stones, he said.

"Eventually the police shot back something, I'm not exactly sure what," he said. "We didn't wait to see. But as soon as we saw some sort of firing coming from the gun and heard it, the whole crowd stampeded out and we sprinted away."

He said they fled to an area that seemed calmer and were approached by four or five Egyptians in plain clothes.

The Egyptians offered to lead them to safety but instead took them into custody, Sweeney said.

They were threatened to be force-fed gasoline, beaten and forced to lie in a near-fetal position in the dark for six hours with their hands in cuffs behind their backs, Sweeney said. He said they were told: "If you move or make any noise, we will shoot you."

"They were hitting us in the face and in the back of the neck," he said. "Not to the point of bleeding or I can't say I have any lasting major scars at this point, but they were hitting us."

Sweeney is 19 and studies at Georgetown University. He was arrested along with Luke Gates, 21, who attends Indiana University and is from Bloomington, Ind., and Gregory Porter, 19, who studies at Drexel University and is from Glenside, Pa.

The students flew home Saturday after an Egyptian court ordered their release two days earlier. The three were studying abroad at American University in Cairo, which is near Tahrir Square.

A popular uprising earlier this year forced out Egypt's longtime autocratic leader, Hosni Mubarak. But the democratic age that Egyptians hoped for has not followed. The military is in control, and protesters want it to hand power to civilians.

At least 43 protesters have been killed since Nov. 19 and 2,000 wounded, most of them in Cairo. Landmark parliamentary elections will start Monday.

Egyptian officials said they arrested the three students on the roof of a university building and accused them of throwing firebombs at security forces fighting with protesters.

But Sweeney denies doing anything to harm anyone and said he and the other Americans weren't ever on the roof or handling or throwing explosives.

"I don't know where that rooftop idea actually came from," he said. "We were never on a rooftop, we never entered a building. The American University campus building on that street where we were arrested ? there were a lot of people that had broken in there, it was swarmed with protesters ? but we were not on there. We were on a street."

In an earlier telephone interview with the AP after he arrived at St. Louis' international airport, Sweeney said he and the other students' treatment improved dramatically after the first night. He spoke with a U.S. Embassy official, his mother and a lawyer. He said he denied the accusations during what he called proper questioning by Egyptian authorities.

"There was really marked treatment between the first night and the next three nights or however long it was," Sweeney said. "After that first night, we were treated in a just manner ... we were given food when we needed, and it was OK."

The students took separate flights out of Egypt, and Porter and Gates declined to recount details of their experience after arriving in Philadelphia and Indianapolis, respectively.

"I'm not going to take this as a negative experience. It's still a great country," Gates said.

Porter said only that he was thankful for the help he and the others received from the U.S. Embassy in Cairo, administrators at the university they were attending, and attorneys in Egypt and the U.S.

"I'm just so thankful to be back, to be in Philadelphia right now," he said.

___

Associated Press photographers Jeff Roberson in St. Louis and Michael Conroy in Indianapolis contributed to this report. AP writers Kathy Matheson in Philadelphia, Bill Cormier in Atlanta and Andale Gross and Erin Gartner in Chicago also contributed.

Source: http://us.rd.yahoo.com/dailynews/rss/africa/*http%3A//news.yahoo.com/s/ap/20111128/ap_on_re_us/us_egypt_american_students

dia de los muertos dia de los muertos david arquette lionfish lionfish denver weather conjoined twins

Sunday, November 27, 2011

iPad vs. iPod touch vs. Kindle Fire: Which should you get?

Comparing the pros and cons, costs and features, between Apple’s iPad 2 and iPod touch, and Amazon’s new Kindle Fire Trying to decide between an Apple iPad 2 or iPod touch and an Amazon Kindle, either for yourself or as a gift for someone else? There’s a lot to consider...


Source: http://feedproxy.google.com/~r/TheIphoneBlog/~3/4i5pvouTfkk/story01.htm

amr apple press conference apple press conference apple event apple event buccaneers buccaneers

Bahrain creates panel to study unrest report

MANAMA, Bahrain (AP) ? Bahrain's state media says the country's king has ordered the creation of a special commission to study recommendations from an independent investigation into political unrest.

The decision by King Hamad Bin Isa Al Khalifa follows the release last week of a 500-page report that detailed abuses such as torture and excessive force in a crackdown on protests by Bahrain's majority Shiites for greater rights.

The report urges Bahrain's Sunni monarchy to take measures that include possible reforms in legal and security codes.

The official Bahrain News Agency said Sunday the new commission will evaluate the report and make its own suggestions before the end of February.

Associated Press

Source: http://hosted2.ap.org/APDEFAULT/cae69a7523db45408eeb2b3a98c0c9c5/Article_2011-11-27-ML-Bahrain/id-fdec0acf21ff49cda0b21ca89e9584f0

jeff goldblum uc berkeley ohio state basketball annie annie zuccotti park leymah gbowee

Saturday, November 26, 2011

Pregnancy is a drag for bottlenose dolphins

Pregnancy is a drag for bottlenose dolphins [ Back to EurekAlert! ] Public release date: 24-Nov-2011
[ | E-mail | Share Share ]

Contact: Kathryn Knight
kathryn@biologists.com
44-787-634-4333
The Company of Biologists

Lumbering around during the final weeks before delivery is tough for any pregnant mum. Most females adjust their movements to compensate for the extreme physical changes that accompany the later stages of pregnancy. However, no one had been able to find a distinct gait change such as a change in stride length or frequency associated with the latter stages of pregnancy. Intrigued by the ways that newborn dolphins learn to swim after birth, Shawn Noren from the Institute of Marine Science, University of California Santa Cruz, realised that she had the perfect opportunity to find out how pregnancy affects female dolphins. Joining a pod of dolphins at Dolphin Quest, Hawaii, just before two of the females gave birth, Noren analysed the impact of pregnancy on the animals' streamlined shape and mobility. She publishes her discovery that pregnant dolphins are significantly disadvantaged by their burden and adopt a new swimming style (gait) in The Journal of Experimental Biology at http://jeb.biologists.org.

'The pregnant females had huge protrusions where the fetus was sitting towards the back end of the body', says Noren, who donned SCUBA gear and spent a large portion of the final fortnight of the dolphins' pregnancies filming under water as they swam parallel to her camera between their trainers. Noren also filmed the dolphin mothers immediately after their calves were born and at regular intervals until the calves were 2 years old. Comparing the footage before and after delivery, Noren realised that pregnant females were slower. Their top speed was restricted to 3.54 m s?, whereas they were able to swim at much higher speeds after giving birth. 'Two to three metres per second is a comfortable speed for most bottlenose dolphins,' says Noren, 'but these pregnant animals did not feel comfortable going beyond that.'

She also measured the animals' girth and calculated their frontal surface area, and realised that the pregnancy had a colossal impact, increasing their frontal surface area by an enormous 51%. And when Noren measured the drag experienced by the animals as they glided through the water, she discovered that it doubled when the mothers were close to delivery.

The pregnant dolphins also had another problem: their increased fat stores in preparation for lactation had also increased their buoyancy. 'The buoyancy issue is going to be problematic when you are going down on a dive to capture prey and they are going to need extra energy to overcome that buoyant force', says Noren. So, pregnancy had a dramatic effect on the dolphin's hydrodynamics, but had it changed their swimming style? Did the pregnant dolphins move with a different gait?

Manually digitising the position of the animals' flukes (tail fins) as they beat up and down, Noren discovered that the pregnant females were unable to sweep their flukes as far as they could after birth. They had reduced the amplitude of their tail beat by 13% and they compensated for the reduced propulsion by beating their flukes faster. The pregnant dolphins had changed gait.

Having found how pregnancy affects soon-to-be dolphin mothers, Noren outlines the additional risks that the females face. Unable to outrun predators, heavily pregnant dolphins are more vulnerable to attack and they may not be able to keep up with the pod if pursued by fishing vessels. Explaining that tuna are still fished using massive nets in the eastern tropical Pacific, Noren says, 'Here is a fast speed event, so it is possible the near term pregnant females are being left behind in the chase. They are reliant on a large pod for protection and cooperative feeding and once the animal is separated it would be hard for it to find the pod again.'

###

IF REPORTING ON THIS STORY, PLEASE MENTION THE JOURNAL OF EXPERIMENTAL BIOLOGY AS THE SOURCE AND, IF REPORTING ONLINE, PLEASE CARRY A LINK TO: http://jeb.biologists.org

REFERENCE: Noren, S. R., Redfern, J. V. and Edwards, E. F. (2011). Pregnancy is a drag: hydrodynamics, kinematics and performance in pre- and post-parturition bottlenose dolphins (Tursiops truncatus). J. Exp. Biol. 214, 4149-4157.

This article is posted on this site to give advance access to other authorised media who may wish to report on this story. Full attribution is required, and if reporting online a link to jeb.biologists.com is also required. The story posted here is COPYRIGHTED. Therefore advance permission is required before any and every reproduction of each article in full. PLEASE CONTACT permissions@biologists.com

THIS ARTICLE IS EMBARGOED UNTIL THURSDAY, 24 November 2011, 00.15 HRS EST (05:15 HRS GMT).


[ Back to EurekAlert! ] [ | E-mail | Share Share ]

?


AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert! system.


Pregnancy is a drag for bottlenose dolphins [ Back to EurekAlert! ] Public release date: 24-Nov-2011
[ | E-mail | Share Share ]

Contact: Kathryn Knight
kathryn@biologists.com
44-787-634-4333
The Company of Biologists

Lumbering around during the final weeks before delivery is tough for any pregnant mum. Most females adjust their movements to compensate for the extreme physical changes that accompany the later stages of pregnancy. However, no one had been able to find a distinct gait change such as a change in stride length or frequency associated with the latter stages of pregnancy. Intrigued by the ways that newborn dolphins learn to swim after birth, Shawn Noren from the Institute of Marine Science, University of California Santa Cruz, realised that she had the perfect opportunity to find out how pregnancy affects female dolphins. Joining a pod of dolphins at Dolphin Quest, Hawaii, just before two of the females gave birth, Noren analysed the impact of pregnancy on the animals' streamlined shape and mobility. She publishes her discovery that pregnant dolphins are significantly disadvantaged by their burden and adopt a new swimming style (gait) in The Journal of Experimental Biology at http://jeb.biologists.org.

'The pregnant females had huge protrusions where the fetus was sitting towards the back end of the body', says Noren, who donned SCUBA gear and spent a large portion of the final fortnight of the dolphins' pregnancies filming under water as they swam parallel to her camera between their trainers. Noren also filmed the dolphin mothers immediately after their calves were born and at regular intervals until the calves were 2 years old. Comparing the footage before and after delivery, Noren realised that pregnant females were slower. Their top speed was restricted to 3.54 m s?, whereas they were able to swim at much higher speeds after giving birth. 'Two to three metres per second is a comfortable speed for most bottlenose dolphins,' says Noren, 'but these pregnant animals did not feel comfortable going beyond that.'

She also measured the animals' girth and calculated their frontal surface area, and realised that the pregnancy had a colossal impact, increasing their frontal surface area by an enormous 51%. And when Noren measured the drag experienced by the animals as they glided through the water, she discovered that it doubled when the mothers were close to delivery.

The pregnant dolphins also had another problem: their increased fat stores in preparation for lactation had also increased their buoyancy. 'The buoyancy issue is going to be problematic when you are going down on a dive to capture prey and they are going to need extra energy to overcome that buoyant force', says Noren. So, pregnancy had a dramatic effect on the dolphin's hydrodynamics, but had it changed their swimming style? Did the pregnant dolphins move with a different gait?

Manually digitising the position of the animals' flukes (tail fins) as they beat up and down, Noren discovered that the pregnant females were unable to sweep their flukes as far as they could after birth. They had reduced the amplitude of their tail beat by 13% and they compensated for the reduced propulsion by beating their flukes faster. The pregnant dolphins had changed gait.

Having found how pregnancy affects soon-to-be dolphin mothers, Noren outlines the additional risks that the females face. Unable to outrun predators, heavily pregnant dolphins are more vulnerable to attack and they may not be able to keep up with the pod if pursued by fishing vessels. Explaining that tuna are still fished using massive nets in the eastern tropical Pacific, Noren says, 'Here is a fast speed event, so it is possible the near term pregnant females are being left behind in the chase. They are reliant on a large pod for protection and cooperative feeding and once the animal is separated it would be hard for it to find the pod again.'

###

IF REPORTING ON THIS STORY, PLEASE MENTION THE JOURNAL OF EXPERIMENTAL BIOLOGY AS THE SOURCE AND, IF REPORTING ONLINE, PLEASE CARRY A LINK TO: http://jeb.biologists.org

REFERENCE: Noren, S. R., Redfern, J. V. and Edwards, E. F. (2011). Pregnancy is a drag: hydrodynamics, kinematics and performance in pre- and post-parturition bottlenose dolphins (Tursiops truncatus). J. Exp. Biol. 214, 4149-4157.

This article is posted on this site to give advance access to other authorised media who may wish to report on this story. Full attribution is required, and if reporting online a link to jeb.biologists.com is also required. The story posted here is COPYRIGHTED. Therefore advance permission is required before any and every reproduction of each article in full. PLEASE CONTACT permissions@biologists.com

THIS ARTICLE IS EMBARGOED UNTIL THURSDAY, 24 November 2011, 00.15 HRS EST (05:15 HRS GMT).


[ Back to EurekAlert! ] [ | E-mail | Share Share ]

?


AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert! system.


Source: http://www.eurekalert.org/pub_releases/2011-11/tcob-pia111611.php

post office hours coptic coptic breaking bad season finale breaking bad season finale jets patriots breaking bad

Oil hovers above $96 amid Europe debt worries

(AP) ? Oil prices hovered above $96 a barrel Friday in Asia as Europe's debt crisis undermined confidence the continent will avoid recession next year.

Benchmark crude for January delivery was up 11 cents at $96.28 a barrel at late afternoon Singapore time in electronic trading on the New York Mercantile Exchange. The contract last settled on Wednesday in New York at $96.17, down $1.84. Markets in the U.S. were closed Thursday for the Thanksgiving holiday.

Brent crude for January delivery fell 40 cents at $107.38 a barrel on the ICE Futures Exchange in London.

Markets close early in the U.S. later Friday for Thanksgiving.

Investor concern that fiscal austerity measures to lower Europe's debt levels will hurt global economic growth and oil demand has helped pull crude back from above $103 last week.

Credit ratings agency Fitch downgraded Portugal's long-term debt rating to BB+ from BBB-, following a similar move recently by Moody's.

Uncertainty about contagion spreading from Greece to Portugal, Italy, Spain and Ireland has begun to undermine confidence in Germany and France. The yield on Germany's 10-year bond rose above the 10-year UK government bond for the first time since 2009.

"The eurozone sovereign crisis is starting to threaten the bond markets of even the most solid European economy ? Germany," Barclays Capital said in a report.

In other Nymex trading, heating oil rose 1.6 cents to $2.99 per gallon and gasoline futures gained 1.9 cents to $2.52 per gallon. Natural gas added 1.4 cents to $3.47 per 1,000 cubic feet.

Associated Press

Source: http://hosted2.ap.org/APDEFAULT/f70471f764144b2fab526d39972d37b3/Article_2011-11-25-Oil-Prices/id-cbbae5738dc3448e84f1e99d2a5d1f59

jerome harrison ryan leaf ryan leaf carlos santana jahvid best libya map libya map