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We give you many useful information about health

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We give you many useful information about health

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Selasa, 25 Oktober 2011

A DNA Check Reveals Widespread Fish Mislabeling In Massachusetts

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Once filleted, it's easy to confuse one white-fleshed fish for another. Enlarge iStockphoto.com

Once filleted, it's easy to confuse one white-fleshed fish for another.

Once filleted, it's easy to confuse one white-fleshed fish for another. iStockphoto.com

Once filleted, it's easy to confuse one white-fleshed fish for another.

Beware, Massachusetts fish fans: If you're buying or ordering red snapper, white tuna, local cod or haddock, there's a pretty good chance that's not what you're going to get.

Two intrepid reporters at the Boston Globe set out to figure out just how bad one form of fish fraud — mislabeling — is in restaurants, markets and grocery stores across the state. They collected 183 samples of fish from 134 sites and hired a laboratory in Canada to check the DNA. And they published their results in a two-part series this week: scientists found that 87 of 183 were sold with the wrong species name — some 48 percent.

"... if you're at a sushi restaurant and they're serving red snapper, it's almost definitely not red snapper," Globe reporter told NPR's Melissa Block last night on All Things Considered. "It's probably tilapia. And if you're ordering white tuna, it's also probably not white tuna. You're probably going to get escolar."

(If you're not familiar with escolar, it has the unpalatable nickname of "the ex-lax fish" because it sometimes causes gastrointestinal problems.)

 

The reporters focused on the red snapper, white tuna, local cod and haddock because those are the ones most likely to be mislabeled. That's partly because cheaper substitutes — like escolar, ocean perch or Vietnamese catfish — closely resemble them, especially once they've been filleted. "Even the best chefs can have difficulty [telling the difference]," an industry expert told the Globe.

Greed and limited availability of some fish — as well as ignorance — seem to be the driving forces behind the fraud, the paper found. In some cases, the fish get mislabeled at the beginning of the supply chain. In other cases, it's restaurant owners or chefs who never change the menu once a favorite fish becomes too expensive or too hard to find.

Local commercial fishermen are also none too pleased by revelations of just how widespread the problem is. One Cape Cod fisherman said that when frozen fish from the Pacific is sold as fresh local fish, "it kills us."

It also irks marine biologists. As our health blog Shots has reported, a conservation biologist at the Guy Harvey Research Institute in Fort Lauderdale, Fla., did a similar DNA study in 2009 and found the same problem.

Here at The Salt, we were wondering whether those of us outside of Boston should be worried about mislabeling, too. The answer is: probably. But National Fisheries Institute spokesman Gavin Gibbons tells us that the problem could be worse in New England because it's such a big seafood market.

Gibbons says there are things consumers can do to minimize fish fraud. "Find out if your local restaurant and grocery store uses suppliers that are members of the Better Seafood Board," he says. "If the answer is no, your answer should be 'why not?' (No members of the Better Fish Board, which was formed to help eliminate fraud in the seafood industry, were implicated in the Globe investigation.)



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Kamis, 13 Oktober 2011

Decoded DNA Reveals Details Of Black Death Germ

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Victims of the plague are consigned to a communal burial during the Plague of London in 1665. Universal Images Group/Getty Images

Victims of the plague are consigned to a communal burial during the Plague of London in 1665.

Scientists have used DNA lurking inside the teeth of medieval Black Death victims to figure out the entire genetic code of the deadly bacterium that swept across Europe more than 600 years ago, killing an estimated half of the population.

The researchers didn't find any genetic feature that could explain why the plague was so virulent, according to a report just published in the journal Nature.

"There is no smoking gun, so to speak, to say, 'Aha, we've found the one mutation which caused this tremendous virulence and now we know why it killed 50 million people.' We don't see that," says biological anthropologist Hendrik Poinar of McMaster University in Hamilton, Canada, who was on the research team.

 

He says the most likely explanation for the plague's devastation is that this rodent-infecting bacterium changed and struck humans for the first time right when the population of Europe was dealing with a cooling climate, poor crop production and filthy, crowded conditions.

Plus, people back then had no access to modern antibiotics and were likely weakened by other infections as well.

Poinar says the ancient Black Death DNA looks so similar to Yersinia pestis that still infects people today that researchers believe the medieval strain must be the ancestor of all modern strains.

That suggests this particular disease probably wasn't around centuries earlier and couldn't have caused the Plague of Justinian, another famous epidemic that devastated the Eastern Roman Empire in 541-542.

"More likely is that it was caused by another pathogen altogether that we haven't really considered yet," says Poinar.

In the past, other research groups have produced conflicting results when they've tried to detect Black Death bacteria in skeletal remains using less sensitive genetic tools. Some experts have argued that the famous plague might have been caused by a different disease, such as an Ebola-like virus.

This study used a newer, more robust genetic technique to fish out small bits of the ancient DNA from the dried powdery pulp hidden inside teeth taken from a Black Death cemetery in London.

"This is really the first ancient complete genome from skeletonized remains," says Poinar, who notes that scientists have sequenced the genes of the deadly 1918 flu virus, but that was from preserved tissue samples.

The Natural History Museum of Denmark's Thomas Gilbert is one of the scientists who tried to find plague DNA in Black Death victims in the past without success. He says the new technique used in this study is exciting and the analysis is compelling. "It's a great result. It looks very, very convincing," Gilbert says. "There's no reason why the data shouldn't be real."

But even if this has firmly established that plague bacteria caused the Black Death, Gilbert thinks the calculations that rule out its presence during the Justinian plague are open to question.

"I'm not completely convinced by that," says Gilbert. "The only way to find out what caused the Justinian plague is to do the same analysis on the Justinian samples, and I guess that's going to be the next attempt."

He says other groups have been working to use this same technique to probe for other diseases of historical interest. "What was unique about this paper is that they basically finished first and they did it on plague," says Gilbert. "But I know for example, people are doing it on tuberculosis, and people are doing it on all sorts of other things."

He says the insights that come from these studies will be of interest not only from a historical perspective, but also to help scientists understand how deadly epidemics have emerged in the past so that they can get ready for what might come in the future.



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Senin, 19 September 2011

Bobby Bowden reveals he had prostate cancer

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Bobby Bowden said he learned he had cancer after a routine examination by the Florida State team doctor.Bobby Bowden says he was treated for cancer while coachingHe did not want to reveal the disease for fear of giving competitors an edgeThe retired Florida State coach is now cancer freeBowden urges men to talk with their doctors about prostate cancer screenings

(CNN) -- Retired Florida State football coach Bobby Bowden revealed Tuesday that he was secretly treated for prostate cancer in 2007 while he was still coaching.

"I wasn't ashamed of it," Bowden said in an appearance on CNN explaining why he did not reveal the disease sooner. "I didn't want it to get out because I didn't want my opponents to use it against me."

He said other coaches would have used the information to steal recruits from the Florida State program that he led to two national championships, 12 conference championships and 28 consecutive bowl games on the way to amassing more than 300 wins. Bowden retired in 2009.

Bowden said he learned he had cancer after a routine examination by the Florida State team doctor, Kris Stowers. A few days after the exam, Stowers called and said a blood test had revealed a "little problem," said Bowden, who was 77 when he was diagnosed.

Stowers quickly arranged a clandestine visit to a urologist Bowden once coached.

"Then he said, 'Bring your wife,'" Bowden said. "That scared me."

In a USA Today interview, the doctor, Joe Camps, said he treated Bowden under an assumed identity in a midnight operation at a Florida hospital.

"But I am absolutely stunned this has remained secret for so long," the newspaper quoted Camps as saying.

Bowden had small radioactive pellets surgically implanted in his prostate to kill the cancer cells and is now cancer free, according to the USA Today story.

Bowden made the revelation during Prostate Cancer Awareness Month as part of his affiliation with On the Line, a prostate cancer awareness program.

He urged men to talk with their doctors about being tested for the disease.

About one in every six men will be diagnosed with prostate cancer, according to the American Cancer Society.



View the original article here



Peliculas Online

Jumat, 16 September 2011

HEALTH MANAGEMENT. Bobby Bowden reveals he had prostate cancer

Bobby Bowden said he learned he had cancer after a routine examination by the Florida State team doctor.Bobby Bowden says he was treated for cancer while coachingHe did not want to reveal the disease for fear of giving competitors an edgeThe retired Florida State coach is now cancer freeBowden urges men to talk with their doctors about prostate cancer screenings
(CNN) -- Retired Florida State football coach Bobby Bowden revealed Tuesday that he was secretly treated for prostate cancer in 2007 while he was still coaching.
"I wasn't ashamed of it," Bowden said in an appearance on CNN explaining why he did not reveal the disease sooner. "I didn't want it to get out because I didn't want my opponents to use it against me."
He said other coaches would have used the information to steal recruits from the Florida State program that he led to two national championships, 12 conference championships and 28 consecutive bowl games on the way to amassing more than 300 wins. Bowden retired in 2009.
Bowden said he learned he had cancer after a routine examination by the Florida State team doctor, Kris Stowers. A few days after the exam, Stowers called and said a blood test had revealed a "little problem," said Bowden, who was 77 when he was diagnosed.
Stowers quickly arranged a clandestine visit to a urologist Bowden once coached.
"Then he said, 'Bring your wife,'" Bowden said. "That scared me."
In a USA Today interview, the doctor, Joe Camps, said he treated Bowden under an assumed identity in a midnight operation at a Florida hospital.
"But I am absolutely stunned this has remained secret for so long," the newspaper quoted Camps as saying.
Bowden had small radioactive pellets surgically implanted in his prostate to kill the cancer cells and is now cancer free, according to the USA Today story.
Bowden made the revelation during Prostate Cancer Awareness Month as part of his affiliation with On the Line, a prostate cancer awareness program.
He urged men to talk with their doctors about being tested for the disease.
About one in every six men will be diagnosed with prostate cancer, according to the American Cancer Society.