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3 Smart Things About Sunburn
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slug= st_3smart
section= medtech
subsection= health
headline= 3 Smart Things About Sunburn
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<p><strong>1</strong> Early hominids may have developed a sensitivity to UV rays for the good of the species. Based on a study using blood plasma, just an hour in direct sunlight could cause a 30 to 50 percent drop in folate levels — and low folate is linked to both abnormal sperm and birth defects. Good news for nerds: It's survival of the palest!</p>
<p><strong>2</strong> World War II sailors were early adopters of sunscreen. The zinc oxide they smeared on their noses served to reflect and scatter UV light. Today's lotions have added organic compounds that absorb UV energy and dissipate it as heat.</p>
<p><strong>3</strong> The sun isn't all evil. It stimulates your skin to produce vitamin D, and one study suggests that 1,000 IUs of D per day reduces your risk of certain cancers by up to 50 percent. But that's not a free pass to bake: More than 15 minutes of exposure daily over 40 percent of your body might just be an invitation to skin cancer.</p><br style="clear: both;"/>
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Video: Emergency Room Stroke Exam with a Webcam
Doctors in rural ERs use webcams to get expert opinions on stroke patients. A study says that this technology helps them make the right decision.<br style="clear: both;"/>
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Updata: Dire Prognosis for Once-Promising Artificial Blood
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pageType= magazinesmall
slug= st_fakeblood
section= medtech
subsection= health
headline= Updata: Dire Prognosis for Once-Promising Artificial Blood
authorName= Katharine Gammon
creditType= photo
credit= Suede
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<p>It "doesn't look like something you'd want dripping into your veins," wrote Wil McCarthy in the August 2002 issue of <cite>Wired</cite>. At the time, he had no way of knowing just how right he was about Hemopure, the artificial blood that seemed so promising. It was universally compatible and had a three-year shelf life (unrefrigerated). But a recent meta-analysis of trials on several substitutes — including Hemopure — contains some gory results. Turns out, the fake bloods scavenge nitric oxide, causing vasoconstriction; patients who get them are 2.7 times more likely to have a heart attack and 30 percent more likely to die. A <cite>Journal of the American Medical Association</cite> editorial has called for a halt to trials. </p><br style="clear: both;"/>
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Study: Exercise Slows Alzheimer's Brain Death
Patients with early Alzheimer's disease who exercised regularly saw less deterioration in the areas of the brain which control memory, according to a study released Sunday at the 2008 International Conference on Alzheimer's Disease in Chicago.<br style="clear: both;"/>
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Cancer Center Warns of Kids' Cellphone Risks
The director of the University of Pittsburgh Cancer Institute issues an unprecedented warning to faculty and staff Wednesday: Limit cell phone use because of the possible risk of cancer, especially for children. The advice is contrary to many studies, but Dr. Ronald B. Herberman says he's basing his alarm on early, unpublished data.<br style="clear: both;"/>
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Symbiotic Bacteria's Disappearance Could Cause More Asthma
A once-ubiquitous symbiotic intestinal microbe, H. pylori, is now found in just one-fifth of young Americans, thanks to antibiotics. Its disappearance may be linked to a rise in asthma rates, researchers suggest.<br style="clear: both;"/>
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Climate Change Means More Kidney Stones
Climate change won't just spread contagious disease: It'll cause more kidney stones.<br style="clear: both;"/>
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Crowdsourcing the Flu Vaccine
Openness and data-sharing could make for a better flu vaccine.<br style="clear: both;"/>
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Researchers Track Disease With Google News, Google.org Money
Epidemiologists are tracking global disease by parsing Google News sources and public health list-serves into data that could provide an early warning about the next big disease outbreak.<br style="clear: both;"/>
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Calorie Restriction Comes in a Pill
A drug based on a compound found in red wine promises all the anti-aging goodness of caloric restriction, but without the starvation, in a new study with mice.<br style="clear: both;"/>
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