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Scientific American - Objets Actus

Scientific American Magazine: Letters
Mercredi 16 Janvier 2008 - 22:00 - 10 mois, 2 semaines depuis - Cancer - Scientific American
Drug Dilemma

News: Father of Breakthrough Cancer Therapy Dies
Mardi 15 Janvier 2008 - 16:00 - 10 mois, 2 semaines depuis - Cancer - Scientific American
Judah Folkman, "the father of antiangiogenesis," a way to starve tumors of their blood supplies, died yesterday from an apparent heart attack. He was 74 years old.

News: E-noses Could Make Diseases Something to Sniff at
Vendredi 11 Janvier 2008 - 14:00 - 10 mois, 3 semaines depuis - Cancer - Scientific American
Ancient medical practitioners plied their trade by trusting their noses. They knew that diabetes could make a patient's breath smell sweet and that a wound emitting a foul odor was infected. These early doctors, lacking today's sophisticated technology, often relied on their sense of smell to diagnose illness.

News: Tumor Time Bombs Set Off by Stem Cells
Jeudi 10 Janvier 2008 - 22:00 - 10 mois, 3 semaines depuis - Cancer - Scientific American
Researchers say they have identified a switch that makes dormant breast cancer cells that have traveled to the lungs swell to lethal proportions--completing the dreaded process of metastasis or cancer spread. A team from Cold Spring Harbor Laboratory in Long Island, N.Y., reports that it staved off full-blown metastasis in mice by preventing mini-tumors in the lungs from recruiting stem cells called endothelial progenitors, which assemble into blood vessels to nourish the malignancy.

Scientific American Magazine: Cell Defenses and the Sunshine Vitamin
Lundi 07 Janvier 2008 - 14:45 - 10 mois, 4 semaines depuis - Cancer - Scientific American
It was called the sunshine cure, and in the early 20th century, before the era of antibiotics, it was the only effective therapy for tuberculosis known. No one knew why it worked, just that TB patients sent to rest in sunny locales were often restored to health. The same “treatment” had been discovered in 1822 for another historic scourge, rickets--a deforming childhood condition caused by an inability to make hardened bone. Rickets had been on the rise in 18th- and 19th-century Europe, coinciding with industrialization and the movement of people from the countryside to the polluted cities, when a Warsaw doctor observed that the problem was relatively rare in rural Polish children. He began experimenting with city children and found that he could cure their rickets with exposure to sunshine alone.

Sciam Observations Blog: Sunbathing: good or bad?
Lundi 07 Janvier 2008 - 12:28 - 10 mois, 4 semaines depuis - Cancer - Scientific American
Is it better to bask in the sun and boost your production of Vitamin D or hide from its rays and the potential skin cancer they cause? A new study leans toward the former, at least for those from the high latitudes, like Scandinavia.Quoting from the press release:"We know that solar radiation is the leading cause of skin cancer," said biophysicist Richard Setlow of Brookhaven National Laboratory and a well-known expert on the link between solar radiation and skin cancer.

Scientific American Body: Getting to Know Nutraceuticals
Jeudi 03 Janvier 2008 - 15:10 - 11 mois depuis - Cancer - Scientific American
We live in an age when good nutrition practices--eat lots of whole grains, fresh fruits and fresh vegetables; hold the fatty meat and hydrogenated vegetable oils--are simple, straightforward and widely available. But visit a well-stocked health food store, pharmacy or supermarket, and you’d never know it. The variety of dietary supplements can be overwhelming, with dozens of vitamins, minerals and extracts offered alone and in combinations targeted at every possible intersection of age, sex and activity. And that selection is a nutritional desert compared to the tropical rain forest–level diversity of supplements at more specialized stores.

Scientific American Body: Pro-Drug Gets Attention
Jeudi 03 Janvier 2008 - 14:00 - 11 mois depuis - Cancer - Scientific American
ALL-DAY RELIEF FROM ADHD: The U.S. Food and Drug Administration is now considering whether to approve the marketing of Vyvanse (lisdexamfetamine dimesylate, made by Shire) to adults with attention-deficit hyperactivity disorder (ADHD).

Psychedelic Healing? [Scientific American Mind]
Vendredi 28 Décembre 2007 - 10:50 - 11 mois, 1 semaine depuis - Cancer - Scientific American
Mind-altering psychedelics are back--but this time they are being explored in labs for their therapeutic applications rather than being used illegally. Studies are looking at these hallucinogens to treat a number of otherwise intractable psychiatric disorders, including chronic depression, post-traumatic stress disorder, and drug or alcohol dependency.The past 15 years have seen a quiet resurgence of psychedelic drug research as scientists have come to recognize the long-underappreciated potential of these drugs. In the past few years, a growing number of studies using human volunteers have begun to explore the possible therapeutic benefits of drugs such as LSD, psilocybin, DMT, MDMA, ibogaine and ketamine. [More]

Top 25 Science Stories of 2007 [News]
Vendredi 21 Décembre 2007 - 20:00 - 11 mois, 2 semaines depuis - Cancer - Scientific American
The past year has been both tempestuous and exciting--from pet food, E. coli and toy poisoning scares to political fireworks over embryonic stem cell research to forest fires ravaging California. A controversial Nobel scientist (James Watson) went down in a blaze of infamy, tumbling from grace after putting his foot in his mouth one time too many, whereas a former vice president and defeated presidential candidate (Al Gore) rose from the ashes to become a Nobel Peace prize (and Oscar) winner for raising awareness on the urgency of global warming. The honor came on the heels of official worldwide recognition that climate change is not only a pressing problem, but one that was almost completely caused by humans--and one, too, that humans must fix.On a related note, we discovered that the North Pole is melting, beloved freshwater dolphins are practically extinct and nuclear power--feared since the 1979 near-meltdown of the Three Mile Island nuke plant in Middletown, Pa.--has become the clean-energy alternative du jour that even has the backing of some enviros. For the first time, too, we enjoyed (depending on how you look at it) an extra month of daylight saving time, thanks to Congress, which made the move to save energy and, lawmakers said, to cut down on traffic accidents--and, perhaps most important, to make Halloween more special and safe. [More]

Actus fournies par : Scientific American

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