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It's Plain the Rain Ups Chili Peppers' Pain

60-Second Science60-Second Science | More Science

Chili peppers in wet areas are spicier than their dry counterparts, due to higher capsaicin levels needed to fight seed-attacking fungi. Christopher Intagliata reports

More 60-Second Science

Spiciness is a chili pepper's best defense against seed-attacking microbes. But not all chilies are hot. Because producing that heat comes at a price. So says a study in the journal Proceedings of the Royal Society B. [David C. Haak et al., "Why are not all chilies hot? A trade-off limits pungency"]

Researchers looked at wild chili populations along a 185-mile stretch of southern Bolivia, as the climate goes from wet to dry. At each site, they taste-tested chilies for heat. Later they analyzed samples for concentrations of capsaicinoids?the spicy stuff. Turns out only a fifth of the chili plants in dry regions packed heat. But in wet areas, all the chilies were picante. Because that's where fungi attack the peppers, and the chilies need chemical weapons to protect their seeds.

But there is a cost for that defense. The spicy chili plants in this study use water far less efficiently?and during periods of drought, they produce only half as many seeds as their mild cousins.

As for home gardeners hoping to grow spicier chilies? Don't figure on simply watering your garden more. The authors say that to select for spicy genes you?ll have to tend the pepper patch for some 20,000 generations.

?Christopher Intagliata

[The above text is a transcript of this podcast.]
?


Source: http://rss.sciam.com/click.phdo?i=0b1abf349a60ac09150460cfd16f38a1

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5 killed in drive-by shooting in northeast Nigeria (AP)

MAIDUGURI, Nigeria ? Authorities in northeast Nigeria are blaming a radical Muslim sect for a drive-by shooting that left five civilians dead.

Lt. Col. Hassan Mohammed said Saturday that the gunmen had attacked people gathered outside a shop in the city of Maiduguri on Thursday night. The assailants were carrying Kalashnikov rifles under their flowing robes.

The sect known as Boko Haram has been blamed for a string of assassinations and bombings in its campaign to implement strict Shariah law in Africa's most populous nation.

While the militants initially targeted mainly police officers, recent attacks have killed a growing number of civilians.

There has been no immediate claim of responsibility, but Boko Haram is known to launch drive-by shootings in its attacks.

Source: http://us.rd.yahoo.com/dailynews/rss/africa/*http%3A//news.yahoo.com/s/ap/20111217/ap_on_re_af/af_nigeria_violence

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NASA's RXTE detects 'heartbeat' of smallest black hole candidate

Friday, December 16, 2011

An international team of astronomers has identified a candidate for the smallest-known black hole using data from NASA's Rossi X-ray Timing Explorer (RXTE). The evidence comes from a specific type of X-ray pattern, nicknamed a "heartbeat" because of its resemblance to an electrocardiogram. The pattern until now has been recorded in only one other black hole system.

Named IGR J17091-3624 after the astronomical coordinates of its sky position, the binary system combines a normal star with a black hole that may weigh less than three times the sun's mass. That is near the theoretical mass boundary where black holes become possible.

Gas from the normal star streams toward the black hole and forms a disk around it. Friction within the disk heats the gas to millions of degrees, which is hot enough to emit X-rays. Cyclical variations in the intensity of the X-rays observed reflect processes taking place within the gas disk. Scientists think that the most rapid changes occur near the black hole's event horizon, the point beyond which nothing, not even light, can escape.

Astronomers first became aware of the binary system during an outburst in 2003. Archival data from various space missions show it becomes active every few years. Its most recent outburst started in February and is ongoing. The system is located in the direction of the constellation Scorpius, but its distance is not well established. It could be as close as 16,000 light-years or more than 65,000 light-years away.

The record-holder for wide-ranging X-ray variability is another black hole binary system named GRS 1915+105. This system is unique in displaying more than a dozen highly structured patterns, typically lasting between seconds and hours.

"We think that most of these patterns represent cycles of accumulation and ejection in an unstable disk, and we now see seven of them in IGR J17091," said Tomaso Belloni at Brera Observatory in Merate, Italy. "Identifying these signatures in a second black hole system is very exciting."

In GRS 1915, strong magnetic fields near the black hole's event horizon eject some of the gas into dual, oppositely directed jets that blast outward at about 98 percent the speed of light. The peak of its heartbeat emission corresponds to the emergence of the jet.

Changes in the X-ray spectrum observed by RXTE during each beat reveal that the innermost region of the disk emits enough radiation to push back the gas, creating a strong outward wind that stops the inward flow, briefly starving the black hole and shutting down the jet. This corresponds to the faintest emission. Eventually, the inner disk gets so bright and hot it essentially disintegrates and plunges toward the black hole, re-establishing the jet and beginning the cycle anew. This entire process happens in as little as 40 seconds.

While there is no direct evidence IGR J17091 possesses a particle jet, its heartbeat signature suggests that similar processes are at work. Researchers say that this system's heartbeat emission can be 20 times fainter than GRS 1915 and can cycle some eight times faster, in as little as five seconds.

Astronomers estimate that GRS 1915 is about 14 times the sun's mass, placing it among the most-massive-known black holes that have formed because of the collapse of a single star. The research team analyzed six months of RXTE observations to compare the two systems, concluding that IGR J17091 must possess a minuscule black hole.

"Just as the heart rate of a mouse is faster than an elephant's, the heartbeat signals from these black holes scale according to their masses," said Diego Altamirano, an astrophysicist at the University of Amsterdam in The Netherlands and lead author of a paper describing the findings in the Nov. 4 issue of The Astrophysical Journal Letters.

The researchers say this analysis is just the start of a larger program to compare both of these black holes in detail using data from RXTE, NASA's Swift satellite and the European XMM-Newton observatory.

"Until this study, GRS 1915 was essentially a one-off, and there's only so much we can understand from a single example," said Tod Strohmayer, the project scientist for RXTE at NASA's Goddard Space Flight Center in Greenbelt, Md. "Now, with a second system exhibiting similar types of variability, we really can begin to test how well we understand what happens at the brink of a black hole."

Launched in late 1995, RXTE is second only to Hubble as the longest serving of NASA's operating astrophysics missions. RXTE provides a unique observing window into the extreme environments of neutron stars and black holes.

###

NASA/Goddard Space Flight Center: http://www.nasa.gov/goddard

Thanks to NASA/Goddard Space Flight Center for this article.

This press release was posted to serve as a topic for discussion. Please comment below. We try our best to only post press releases that are associated with peer reviewed scientific literature. Critical discussions of the research are appreciated. If you need help finding a link to the original article, please contact us on twitter or via e-mail.

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Source: http://www.labspaces.net/116101/NASA_s_RXTE_detects__heartbeat__of_smallest_black_hole_candidate

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Whitecaps acquire Nguyen in MLS weighted lottery

Associated Press Sports

updated 4:37 p.m. ET Dec. 15, 2011

VANCOUVER, British Columbia (AP) - The Vancouver Whitecaps have acquired attacking midfielder Lee Nguyen through Major League Soccer's weighted lottery.

The 25-year-old from McKinney, Texas, signed a multi-year contract with MLS on Dec. 6. Nguyen was entered into the weighted lottery after he had turned down a MLS contract when he was drafted in college. He played a season of college soccer at Indiana before joining the Netherlands' PSV Eindhoven for the 2005-06 season.

The Whitecaps were one of six MLS clubs to participate in Thursday's draw for Nguyen. Vancouver was selected ahead of FC Dallas, the Houston Dynamo, the Los Angeles Galaxy, Real Salt Lake and Toronto FC. Each team's record dictates its probability of winning the draw.

? 2011 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.


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Broken leg for Villa

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Report says western states edging toward recovery (AP)

LAS VEGAS ? The West is recovering faster than the nation as a whole, but employment across the region remained far below pre-recession levels and the housing market showed few signs of improvement, according to an economic report released Thursday.

The report prepared by Brookings Mountain West researchers at the University of Nevada, Las Vegas focused on economic growth in 10 metropolitan areas spread across Nevada, Arizona, New Mexico, Utah, Colorado and Idaho.

Overall, the region saw a modest 0.3 percent growth in employment in the quarter ending in September, compared to the national rate of 0.1 percent, the study found. Utah, Colorado and New Mexico ? states that have built broad economic bases ? struggled the least, researchers said. In Arizona and Nevada, the housing collapse continued to limit job growth.

"We don't have a robust, steady recovery yet," said Mark Muro, policy director for the Brookings Metropolitan Policy Program. "The real estate crack up continues to have a severe influence on the places that struggle with it."

In all, every metropolitan area lagged behind pre-recession employment levels, with Phoenix and Las Vegas experiencing the sharpest differences. Job levels languished 10.8 and 13.4 percent below their respective pre-recession peaks.

"The road to recovery remains long and uncertain," the report noted.

Still, there was enough employment growth in the past year to drive down the unemployment rate in every major metropolitan area singled out by the report. Utah and New Mexico had the lowest unemployment rates, while Las Vegas had the highest at 13.6 percent.

Leading the recovery were Utah's Ogden and Provo, Albuquerque in New Mexico, and Phoenix. Boise and Las Vegas showed modest signs, but Tucson, Ariz., and Colorado Springs were still struggling, according to the report. Ogden and Provo saw employment rise by 1.5 percent, and Idaho's Boise saw a 1 percent increase in jobs.

Employment grew by less than 1 percent in Phoenix, Colorado Springs, Salt Lake City and Tucson.

Among the areas that faced a difficult quarter, such as Denver and Albuquerque, job growth in Las Vegas stagnated ? a sign of Nevada's highest-in-the-nation unemployment rate. In Albuquerque and Denver, job growth fell slightly.

Manufacturing gains drove the jobs numbers in Provo and Ogden, while government expansion helped Boise grow its work force. Conversely, government layoffs contributed to economic woes in Colorado Springs, Las Vegas, Albuquerque and Denver. Production levels remained depressed in Tucson, Boise, Phoenix and Las Vegas.

The housing market offered few signs of recovery. Prices across the region remained significantly below last year's totals.

Still, the report highlighted some positive milestones. Prices remained stagnant or improved in eight of the metropolitan areas for the first time since the recession began in 2007. In Las Vegas and Tucson, home values continued to fall, but at a much slower rate than in previous quarters.

In the latest sign of hardship for Sin City, prices there saw the biggest drop from last year, at 19 percent. In all, Las Vegas home prices have dropped by nearly 65 percent since 2006. The steep fall means home prices are unlikely to recover in Las Vegas any time soon, according to the report. Nevada tops the nation in foreclosures, with vacant homes dominating many neighborhoods.

"A lot of people bought five or six houses strictly as an investment," said Mike Young, president of the Nevada Association of Realtors. "People just walked away. The values are too upside-down."

Hard-hit Tucson, Boise and Phoenix also will not see improved home prices in the foreseeable future, the researchers concluded.

"They have high foreclosures, they had massive real estate and construction employment that crashed and that kind of crack up has proven to be toxic to places," Muro said.

Business leaders called the report's findings accurate. In Tucson, where some of the major employers include national banks, health centers and the University of Arizona, officials are trying to promote higher education and attract more technology companies to the region to expand its work force. But the recovery remains weak.

"The Sun Belt markets have just been hammered by the mortgage meltdown and everything having to do with this economy," said Michael Varney, president/CEO of the Tucson Metropolitan Chamber of Commerce.

Source: http://us.rd.yahoo.com/dailynews/rss/economy/*http%3A//news.yahoo.com/s/ap/20111215/ap_on_re_us/us_western_economy

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Oilmen stay home, hospitals full after Kazakh riots (Reuters)

ALMATY (Reuters) ? Wounded victims filled the hospitals of a western Kazakh oil city on Saturday and some oil workers stayed at home, fearing for their safety after Independence Day celebrations turned into the deadliest violence in the ex-Soviet state's recent history.

At least 10 people were killed when riot police clashed on Friday with a crowd in the city of Zhanaozen, centre of protests by nearly 1,000 oil workers sacked by state-controlled KazMunaiGas Exploration Production.

The head of a local trade union told Reuters sporadic shooting had been heard throughout the night in Zhanaozen, a city of 90,000 around 150 km (95 miles) inland from the Caspian Sea. Power and internet communication had been cut off, he said.

"The hospitals in Zhanaozen are all full and they are bringing the wounded to Aktau, civilians and policemen alike," said Kenzhegali Suyeov, chairman of the Aktau independent union.

"They have all kinds of wounds, from gunshot wounds to stab wounds and blunt traumas," he said, sourcing his information to people who had driven from Zhanaozen to Aktau, the regional capital. All roads into Zhanaozen had been blocked, he said.

Public protests are rare in Kazakhstan, Central Asia's largest economy and oil producer, where President Nursultan Nazarbayev has ruled for more than 20 years and has overseen massive foreign investment, mainly in oil and gas.

The clashes marred celebrations across the rest of Kazakhstan to mark the 20th anniversary of independence from the Soviet Union and were a shock to a government that has prized stability and economic growth over democratic freedoms.

The clashes began when sacked oil workers and sympathetic citizens stormed a stage erected for an Independence Day party, toppling sound equipment and later setting fire to the city hall and the headquarters of KazMunaiGas EP's local production unit.

Prosecutor-General Askhat Daulbayev said 10 people had been killed in clashes after law officers were attacked by "hooligans" armed with guns. He did not say who had been killed or how.

Reports on social networking websites said the death toll was much higher than 10 and that police had opened fire. These reports could not be verified independently. New York-based Human Rights Watch said at least some mobile phone and internet access had been shut down in the city.

Interior Minister Kalmukhanbet Kasymov, who flew to Zhanaozen, said around 70 people had been arrested in the city. He said 75 people had been taken to hospital and six police officers were among the injured, Interfax reported.

"The disorder in Zhanaozen has been suppressed. The situation in the city is calm and nobody is on the square," Interfax quoted Kasymov as saying.

"CARNAGE"

Opposition activist Gulzhan Yergaliyeva was among about 100 people attending a ceremony in the commercial capital Almaty to commemorate Kazakhs killed in clashes with Soviet troops and police in December 1986.

"Yesterday, exactly 25 years later, the same tragedy was repeated," she said.

Thousands of KazMunaiGas EP workers began a strike in May demanding better pay and conditions. The company, calling the strikes illegal, sacked 989 workers and has said production will fall 8.5 percent short of its target this year.

The London-listed company said the Interior Ministry was providing armed security at oil production facilities and some workers had failed to show up for the night and morning shifts due to security concerns. A round-the-clock shift by workers on site was maintaining daily output levels.

KazMunaiGas EP, majority owned by state oil and gas company KazMunaiGas, has said 2,500 people were on strike at the height of the dispute. Representatives of the striking workers have put the maximum number at almost 16,000.

Its Uzenmunaigas subsidiary near Zhanaozen employs 9,000 people, but the strikes were not confined to this unit alone. Workers at the Karazhanbasmunai field, a joint venture with Chinese state-owned company CITIC, also downed tools in May.

"For seven months, those striking workers were standing in the scorching sun, in the rain, and wind and snow, and the authorities would not start a dialogue with them," said Bolat Abilov, a leader of the opposition Social-Democratic Party.

Around 20 protesters broke off from the memorial service and attempted to march to the city headquarters of the ruling Nur Otan political party. Riot police detained around half of them.

KazMunaiGas EP's London-traded stock closed down 4.0 percent on Friday, versus a decline of only 0.4 percent in the wider oil and gas sector.

(Additional reporting by Mariya Gordeyeva; editing by Angus MacSwan)

Source: http://us.rd.yahoo.com/dailynews/rss/asia/*http%3A//news.yahoo.com/s/nm/20111217/wl_nm/us_kazakhstan_clashes

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Top retail trade group upgrades holiday forecast

(AP) ? With the final Christmas countdown begun, the nation's largest retail trade group has upgraded its holiday sales forecast reflecting growing optimism that much more spending is to come.

The National Retail Federation said Thursday it now expects holiday sales for the November and December period to rise 3.8 percent to a record $469.1 billion. That's up from its more modest 2.8 percent forecast made in early October when the economy's health looked more uncertain.

The new forecast is hardly stellar. The projected gain is still below the 5.2 percent pace seen during the holiday 2010 season from the prior year, but it's well above the 2.6 percent average increase over the past 10 years.

And any upgraded forecast is good news as stores look to the final days before Christmas to rope in holiday shoppers.

"Retailers are cautiously optimistic that this season will turn out better than initially expected, bringing added stability to our recovering economy at a time when America needs it most," said Matthew Shay, NRF's president and CEO, in a statement. However, Shay acknowledged a number of factors, including the debt crisis in Europe and continued political wrangling in Washington that could hurt consumer spending for the 2011 season and into next year.

The figures in the NRF report exclude automotive dealers, gas stations and restaurants.

The improved forecast comes two days after the government released what the Washington, D.C.-based trade group called "promising" retail sales gains of 4.5 percent compared with the same year-ago period. That was helped by a strong shopper turnout over the Thanksgiving weekend, the official start to the season.

The trade group also cited that its recent consumer poll shows the average American has completed less of their holiday shopping than in previous years. That shows many shoppers bought more for themselves last month and have plenty of buying to do for their family and friends.

Overall economic growth has been picking up some steam in the final three months of the year, driven by rising business stockpiles and modest increases in hiring. But plenty of challenges remain. The job market is still weak, home values remain depressed, and shoppers face higher prices for basic household costs. That's why consumers continue to adhere to the habits learned from the Great Recession ? sticking to necessities and focusing on fat discounts.

"Many shoppers continue to stick to their budgets and buy only what they need," said NRF Chief Economist Jack Kleinhenz in a statement.

So just as stores plied shoppers with the discounts and expanded hours at the start of the holiday season, they see the need to do the same for the finale, which includes some of the season's top spending days like this Saturday.

Starting this past Wednesday, 260 of Sears, Roebuck and Co. locations will stay open until midnight through Dec. 23.

Meanwhile, many online shoppers are expected to take advantage of the extended and often free shipping offers. According to a survey by the NRF, many merchants have set a later expiration for standard shipping rates for items to arrive by Christmas. This year, 87 percent of stores set a deadline of Tuesday, Dec. 20, or earlier, compared with 64 percent setting deadlines of Dec. 18 or earlier last year.

Associated Press

Source: http://hosted2.ap.org/APDEFAULT/f70471f764144b2fab526d39972d37b3/Article_2011-12-15-NRF-Holiday%20Forecast/id-96c203439a904ba899fca8cb8321499e

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