Monday, November 1, 2010

5 Myths about Diabetes

Myth #1

Once you're diagnosed with diabetes, complications such as blindness, loss of limbs and kidney failure are inevitable.

Feinglos says that with proper medication and medical care, regular blood sugar checks and good habits such as staying active and eating right, there's a good chance you'll avoid other health complications. "It's a little bit of work, but you can do extraordinarily well," he says.

But left untreated, or undertreated, more serious health problems can arise. Diabetes causes more deaths a year than breast cancer and AIDS combined, according to the American Diabetes Association. Two out of three people with diabetes die from heart disease or stroke, complications of the condition.

Myth #2

Diabetes is nothing to worry about. I just have a "touch of sugar."

"A touch of diabetes is like a touch of pregnancy," Feinglos says. He says many people, when first diagnosed, will modify their diet but will go along for some time before taking medications to control blood sugar.

"Diet and exercise is the cornerstone, but a lot of people need medication from the start. There's a lot of sentiment about starting meds earlier," says Feinglos, who adds that going on medication right away can help protect insulin-producing beta cells in the pancreas.

Myth #3

People with diabetes should never eat sugary things.

"That one's been floating around for years," says Richard Beaser, medical executive director of professional education at Joslin Diabetes Center, who says it's more about portion control and reaching a healthy weight for people with type 2 diabetes.

"We know now that table sugar doesn't raise blood sugar any more than other starches, like a baked potato, rice or bread," says Elizabeth Kern, director of the diabetes program at National Jewish Health in Denver.

How much a person eats "depends on the individual, their overall weight, and their type of diabetes," says Kern, who recommends everyone newly diagnosed see a nutritionist with expertise in diabetes who can help create an eating plan.

Myth #4

I can't go on that trip because I have diabetes.

"I have had patients say, 'I can't go on this Outward Bound trip,' but you can do that stuff," says pediatric endocrinologist Martha Bardsley of Thomas Jefferson University and Nemours Children's Clinic in Philadelphia. "It's just a matter of staying on top of your medications, testing blood sugar often and keeping it well-controlled. I have a patient who's an Eagle Scout, and he goes on long camping trips off into the wilderness. He just takes extra supplies."

Myth #5

You have to limit your career choices if you have diabetes.

Absolutely not, Bardsley says. With the exception of military colleges, which won't accept students with diabetes, Bardsley says, you can achieve any career goal.

"A lot of my patients think if they have diabetes that they could never be a pilot. There are pilots with diabetes. You just have to meet certain criteria — provide frequent doctor's notes and show your blood sugars are under control," she says.

NASA - Discovery's Last Ride

This image of space shuttle Discovery was taken as the craft began its nighttime trek, known as "rollout," from the Vehicle Assembly Building to Launch Pad 39A.

It took the shuttle, attached to its external fuel tank, twin solid rocket boosters and mobile launcher platform, about six hours to complete the move atop a crawler-transporter.

On STS-133, its final planned mission, Discovery will take the Permanent Multipurpose Module packed with supplies and critical spare parts, as well as Robonaut 2 to the International Space Station.

Image Credit: NASA/Tony Gray

Scientists uncover a genetic on/off switch for immune responses

Scientists are keeping their eye on a new discovery published in the November 2011 print issue of the FASEB Journal (http://www.fasebj.org) that explains what causes some genes to go out of control. Scientists have identified a “cellular switch,” called eye transformer, that controls the flow of information from chemical signals outside of the cell to genes in the cell nucleus.

This study demonstrates that when eye transformer is turned off, the information pathway it controls (the “JAK/STAT pathway”) hyper-activates. Because this pathway exists in humans and is involved in many conditions such as cancer, severe immune deficiencies, autoimmune diseases, and allergies, this discovery reveals a new and potentially important drug target for these conditions.

Indonesia volcano: Mount Merapi erupts again

Mount Merapi is pictured at night from Sidorejo village in Klaten, near the ancient city of Yogyakarta
Massive clouds spilled from the glowing cauldron and billowed into the air, sending debris and ash cascaded nearly four miles (six kilometres) down the southeastern slopes

Mount Merapi volcano spews clouds of ash as it erupts again
Evacuees cringed and fled for cover as an erupting volcano - one of 22 showing increased activity in Indonesia - let loose booming explosions of hot gas and debris, the latest blast in a deadly week.

No new casualties were reported. The new blast from Mount Merapi came as Indonesia also struggles to respond to an earthquake-generated tsunami that devastated remote islands

The twin disasters, unfolding simultaneously on opposite ends of the seismically volatile country, have killed nearly 500 people and severely tested the government's emergency response network.

One of 129 active volcanoes in Indonesia, Merapi has killed 38 people since it started erupting a week ago
Picturesby: Sipa Press / Rex Features and Reuters

NASA ISS Image: Sicily and S Italy at night

This night time image shot by one of the Expedition 25 crew members aboard the International Space Station shows Sicily and the boot of Italy. Part of a docked Russian spacecraft and other components of the ISS are in the foreground
This night time image shot by one of the Expedition 25 crew members aboard the International Space Station shows Sicily and the boot of Italy.

Part of a docked Russian Progress spacecraft and other components of the ISS are visible in the foreground

China has ambitions to reach Mars


Mars Orbital Insertion will be a significant achievement for China's growing space science program.

As China's second Moon probe continues its mission, more information is being disclosed about China's ambitions for worlds beyond.

China has made no secret of its plans to explore Mars, but we are getting a firmer indication of what to expect.

Vague statements in the Chinese media have suggested that China could launch a mission to Mars in 2013. This is an interesting suggestion for a program that's still largely unknown to us. How does this add to our knowledge of China's Mars program?

China's first planned step to Mars is very well known. In 2011, the Yinghuo 1 orbiter will be launched to Mars in tandem with Russia's Phobos-Grunt mission. We know a lot about Yinghuo 1 already, thanks to some fairly open publicity about the mission. Yinghuo 1 is a small orbiter, which will enter a highly elliptical orbit around Mars.

Its main role is to study the tenuous Martian atmosphere, and help to answer one of the greatest mysteries surrounding the planet. Long ago, the atmosphere of Mars was much thicker, helping to produce almost Earthlike conditions on the surface. Why did Mars change into the barren world of today, and why did most of the atmosphere disappear?

Roughly two years after Yinghuo 1 is launched, a new "launch window" will open between Earth and Mars, as the position of the planets becomes favourable again. NASA plans to send an orbiter during this window, and it will also study the Martian atmosphere. Could China be ready to fly again so soon?

There are plenty of reasons to believe that China could do it. Consider recent events. China has successfully carried out a long mission in deep space. The Chang'e 1 mission was China's first lunar orbiter. Launched in 2007, the spacecraft performed well in mapping the entire Moon.

China has followed this with the launch of Chang'e 2 just a few weeks ago. This spacecraft is essentially a copy of Chang'e 1, with different instruments and some improvements to its sub-systems. Chang'e 2 is performing very well, and has navigated successfully into a low lunar orbit. Chinese space engineers must feel pleased. They've developed a generic spacecraft design and proven that it works well, on two flights out of two.

US nuclear safety claim is a ‘dangerous fantasy’ | Science Blog

In their paper, How US strategic antimissile defense could be made to work, George Lewis and Theodore Postol argue that the US should replace the ineffective, untested, and unworkable Ground-Based Missile Systems (GMDs) with a defense that could reliably intercept Iranian and North Korean long-range ballistic missiles before they reach the United States, Northern and Western Europe, and Northern Russia.

The alternative defense would use stealth drones carrying specialized fast interceptors to take down the nuclear-armed long-range ballistic missiles while they are still in powered flight and before they can deploy effective countermeasures.

Since a drone-based system would use a relatively small number of interceptors, it would not threaten Russia’s strategic nuclear forces in a manner that would create policy concerns relating to New START or other future arms reduction agreements. New START is a treaty signed earlier this year by President Barack Obama and Russian President Dmitry Medvedev limiting nuclear weapons. Both countries will be limited to 1,550 ready-to-use, long-range nuclear weapons in addition to the other parts of their nuclear stockpile.

The current GMD and SM-3 systems have fundamental flaws determined by the laws of physics that cannot be overcome, based on technology they both share.

These flaws relate to their ability to accurately target the correct part of the target missile in flight. Newly developed Iranian missiles without tail fins, or warheads attached to rocket bodies that tumble end over end, like those that defeated the Patriot Missile Defense in the Gulf War of 1991, would easily beat these interceptors before they could locate, manoeuvre, and hit the nuclear warhead.

Decoys deployed in the near vacuum of space would also defeat the defense. These decoys will travel along with warheads because there is no air-drag to cause them to slow down. Since the defense would not be able to identify the warheads among the decoys, it would not know how to aim its interceptors.

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