Showing posts with label Scientists. Show all posts
Showing posts with label Scientists. Show all posts

2011/10/27

UK scientists grow super broccoli (AP)

LONDON – Popeye might want to consider switching to broccoli. British scientists unveiled a new breed of the vegetable that experts say packs a big nutritional punch.

The new broccoli was specially grown to contain two to three times the normal amount of glucoraphanin, a nutrient believed to help ward off heart disease.

"Vegetables are a medicine cabinet already," said Richard Mithen, who led the team of scientists at the Institute for Food Research in Norwich, England, that developed the new broccoli. "When you eat this broccoli ... you get a reduction in cholesterol in your blood stream," he told Associated Press Television.

An AP reporter who tasted the new broccoli found it was the same as the regular broccoli. Scientists, however, said it should taste slightly sweeter because it contains less sulphur.

Glucoraphanin works by breaking fat down in the body, preventing it from clogging the arteries. It is only found in broccoli in significant amounts.

To create the vegetable, sold as "super broccoli," Mithen and colleagues cross-bred a traditional British broccoli with a wild, bitter Sicilian variety that has no flowery head, and a big dose of glucoraphanin. After 14 years, the enhanced hybrid was produced, which has been granted a patent by European authorities. No genetic modification was used.

It's been on sale as Beneforte in select stores in California and Texas for the last year, and hit British shelves this month. Later this fall, the broccoli will be rolled out across the U.S.

The super vegetable is part of an increasing tendency among producers to inject extra nutrients into foods, ranging from calcium-enriched orange juice to fortified sugary cereals and milk with added omega 3 fatty acids. In Britain, the new broccoli is sold as part of a line of vegetables that includes mushrooms with extra vitamin D, and tomatoes and potatoes with added selenium.

Not enough data exists to know if anyone could overdose on glucoraphanin, but vitamin D and selenium in very high quantities can be toxic.

Mithen and colleagues are conducting human trials comparing the heart health of people eating the super broccoli to those who eat regular broccoli or no broccoli. They plan to submit the data to the European Food Safety Agency next year so they can claim in advertisements the broccoli has proven health benefits.

"There's a lot of circumstantial evidence that points to (glucoraphanin and related compounds) as the most important preventive agents for (heart attacks) and certain cancers, so it's a reasonable thing to do," said Lars Ove Dragsted, a professor in the department of human nutrition at the University of Copenhagen. He previously sat on panels at the International Agency for Research on Cancer examining the link between vegetables and cancer.

Dragsted said glucoraphanin is a mildly toxic compound used by plants to fight insects. In humans, glucoraphanin may stimulate our bodies' natural chemical defenses, potentially making the body stronger at removing dangerous compounds.

Other experts said eating foods packed with extra nutrients would probably only have a minimal impact compared with other lifestyle choices, like not smoking and exercising.

"Eating this new broccoli is not going to counteract your bad habits," said Glenys Jones, a nutritionist at Britain's Medical Research Council. She doubted whether adding the nutrients in broccoli to more popular foods would work to improve people's overall health.

"If you added this to a burger, people might think it's then a healthy food and eat more burgers, whereas this is not something they should be eating more of," Jones said. She also thought the super broccoli's U.K. price — it costs about a third more than regular broccoli — might discourage penny-pinching customers.

But that wasn't enough to deter Suzanne Johnson, a 43-year-old mother of two young children in London.

"I'm very concerned about the food they eat and would happily pay a bit more to buy something that has an added benefit," Johnson said.

But for her children, taste is ultimately more important than any nutritional value. "Broccoli is one of the vegetables they actually like, so I'm glad it's the one (scientists) have been working on," she said. "This wouldn't work if it had been mushrooms or asparagus."


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2011/06/29

Scientists monitor air as fire burns near NM lab (AP)

By P. SOLOMON BANDA and SUSAN MONTOYA BRYAN, Associated Press P. Solomon Banda And Susan Montoya Bryan, Associated Press – 14?mins?ago

LOS ALAMOS, N.M. – As crews fight to keep a New Mexico wildfire from reaching the nation's premier nuclear-weapons laboratory and the surrounding community, scientists are busy sampling the air for chemicals and radiological materials.

Their effort includes dozens of fixed-air monitors on the ground, as well as a "flying laboratory" dispatched by the U.S. Environmental Protection Agency. The special twin-engine plane is outfitted with sensors that can collect detailed samples.

Sen. Tom Udall of New Mexico requested the agency's help early on in the monitoring effort near the Los Alamos National Laboratory. EPA officials said the flying lab was set to make its initial data-collection fight Wednesday, and state and federal officials have vowed to make findings from all the monitoring efforts public.

"I know people are concerned about what's in the smoke," Udall said. He noted that the state, the Los Alamos lab and the EPA were all looking closely at air quality "so we can assure the public" there will be multiple layers of oversight.

The blaze had grown to more than 108 square miles by Wednesday morning, but firefighters managed to hold the line along the nuclear lab's southern boundary.

On its western edge, firefighters began targeted burns to rob fuel from the fire. Lab officials warned that people might see more smoke coming from the lab border, but they said there was no fire burning on the site as of mid-Wednesday.

Residents downwind have expressed concern about the potential of a radioactive smoke plume if the flames reach thousands of barrels of waste stored in above-ground tents at the lab.

Top lab officials and fire managers say there have been no releases of toxins. They say they're confident the flames won't reach key buildings or areas where radioactive waste is stored. As a last resort, foam could be sprayed on the barrels containing items that might have been contaminated through contact with radioactive materials to ensure they aren't damaged by fire, they said.

The site's manager for the National Nuclear Security Administration said he evaluated the precautions and felt comfortable. The agency oversees the lab for the Department of Energy.

"I have 170 people who validate their measures," Kevin Smith said. "They're in steel drums, on a concrete floor."

Despite the assurances, some residents remained concerned for the safety of their families and nearby communities.

"If it gets to this contamination, it's over — not just for Los Alamos, but for Santa Fe and all of us in between," said Mai Ting, a resident who lives in the valley below the desert mesas that are home to the Los Alamos National Laboratory.

Chris Valvarde, a resident of the Santa Clara Pueblo about 10 miles north of Los Alamos, questioned officials at a briefing Tuesday evening, asking whether they had evacuation plans for his community. Los Alamos, a town of 11,000, already sits empty after its residents were evacuated ahead of the blaze, which started Sunday.

The wildfire has already sparked a spot fire at the lab. The fire Monday was quickly contained, and lab officials said no contamination was released.

Lab Director Charles McMillan said the barrels contain transuranic waste — gloves, toolboxes, tools — and other items that may have been contaminated. An anti-nuclear group had estimated there could be up to 30,000 55-gallon drums stored at a site known as Area G, but lab spokeswoman Heather Clark said Wednesday there are 10,000 drums stored there under fire-retardant tents.

Los Alamos County Fire Chief Doug Tucker, whose department is responsible for protecting the lab, said the barrels are stacked about three high inside the tents.

Area G holds drums of cleanup from Cold War-era waste that the lab sends away for storage in weekly shipments, according to lab officials.

Flames were just across the road from the southern edge of the famed lab, where scientists developed the first atomic bomb during World War II. The facility cut natural gas to some areas as a precaution. The lab will be closed through at least Thursday.

The streets of Los Alamos were empty again Wednesday, with the exception of emergency vehicles and National Guard Humvees. Homeowners who had left were prepared: Propane bottles were placed at the front of driveways and cars were left in the middle of parking lots, away from anything flammable.

The wildfire has destroyed 30 structures south and west of Los Alamos, for many stirring memories of a blaze in May 2000 that destroyed hundreds of homes and buildings in town.

Favorable winds have helped firefighters, who were busy trying to keep the fire from moving off Pajarito Mountain to the west of Los Alamos and into two narrow canyons that descend into the town and the lab.

The lab, which employs about 15,000 people, covers more than 36 square miles and includes about 2,000 buildings at nearly four dozen sites. They include research facilities, as well as waste disposal sites.

Some facilities, including the administration building, are in Los Alamos, while others are miles from the town. Most of the buildings from the Manhattan Project that developed the first atomic bomb in the 1940s were built on what is now the town and are long gone. The spot fire Monday scorched a section known as Tech Area 49, which was used in the early 1960s for a series of underground tests with high explosives and radioactive materials.

Lab spokesman Kevin Roark said environmental specialists were monitoring air quality, but the main concern was smoke. Lab personnel and the state environment department were monitoring the air for radioactivity and particulates.

Additional ground-based monitors were on their way, some of which would be placed in neighboring Espanola and Santa Fe.


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