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Scientific American - Objets Actus

General Anesthesia: Sleep During Surgery, Wake Up in Pain [News]
Mardi 24 Juin 2008 - 13:00 - 5 mois, 1 semaine depuis - Presse spécialisée - Scientific American
Researchers studying the effects of general anesthesia recently made a startling discovery: the drugs used to knock out patients during surgery may lead to increased pain when they wake up. [More]

Mysterious Brain Cells Linked to Blood Flow [News]
Vendredi 20 Juin 2008 - 10:00 - 5 mois, 2 semaines depuis - Presse spécialisée - Scientific American
Nearly a century after the discovery of strange star-shaped cells in the brain, scientists say they have finally begun to unravel their function. [More]

Humans Spreading Disease To Chimps [60-Second Science]
Vendredi 20 Juin 2008 - 08:10 - 5 mois, 2 semaines depuis - Presse spécialisée - Scientific American
[The following is an exact transcript of this podcast.]As you probably know, viruses can jump from animals to people. We’ve gotten flu from birds and pigs. And HIV, the virus that causes AIDS, is thought to have come from chimps. But swapping bugs is a two-way street. Because scientists from Virginia Tech have found that African chimps are coming down with human viruses. [More]

Is Animal Assisted Therapy Really the Cat's Meow? [Scientific American Mind]
Jeudi 19 Juin 2008 - 07:45 - 5 mois, 2 semaines depuis - Presse spécialisée - Scientific American
In 1857 British novelist George Eliot wrote, “Animals are such agreeable friends. They ask no questions and they pass no criticism.” So it is no surprise that scholars have long been intrigued by the possibility that animals possess largely untapped therapeutic powers. But are animals good for our psychological and physical health, either as pets or as “therapists”?Most Americans are animal lovers; about 63 percent of U.S. households contain one or more pets, according to the American Pet Products Manufacturers Association. Several, but not all, studies suggest that those of us who own pets tend to be somewhat happier than those of us who do not. In addition, research by Erika Friedmann and her colleagues at the University of Maryland School of Nursing shows that pet ownership predicts one-year survival rates among victims of heart attacks. [More]

Patient, Heal Thyself: Body's Own Immune Cells Whack Late-Stage Tumor [News]
Mercredi 18 Juin 2008 - 17:00 - 5 mois, 2 semaines depuis - Presse spécialisée - Scientific American
In what could be a breakthrough in cancer therapy, researchers report in The New England Journal of Medicine today that they succeeded in bolstering a patient's immune system enough to wipe out late-stage malignant tumors on its own. The scientists say the successful experiment could pave the way for new treatments of advanced cancer that spare patients the side effects of chemotherapy, which kills healthy as well as malignant cells. [More]

Can Lifestyle Changes Bring Out the Best in Genes? [News]
Mardi 17 Juin 2008 - 18:00 - 5 mois, 2 semaines depuis - Presse spécialisée - Scientific American
A new pilot study shows that eating right, exercising and reducing stress may help keep chronic diseases at bay by switching on beneficial genes, including tumor-fighters, and silencing those that trigger malignancies and other ills. [More]

Jeremy Nicholson's Gut Instincts: Researching Intestinal Bacteria [Scientific American Magazine]
Lundi 16 Juin 2008 - 22:00 - 5 mois, 2 semaines depuis - Presse spécialisée - Scientific American
Editor's Note: The extended Q&A with Jeremy Nicholson mentioned in the July magazine can be found here. Jeremy Nicholson was only trying to be thorough. It was 1981, and the young biochemist was using a technique called nuclear magnetic resonance spectroscopy, which can identify chemicals based on the magnetic properties of atomic nuclei. In particular, Nicholson wanted to study how red blood cells absorb cadmium, a metal that causes cancer. Realizing that he would achieve the best results if he could mimic the cells’ natural environment, he added a few drops of blood to the cells and ran the test. [More]

An Unethical Ethicist? [News]
Lundi 16 Juin 2008 - 16:10 - 5 mois, 2 semaines depuis - Presse spécialisée - Scientific American
When Glenn McGee founded the Alden March Bioethics Institute (AMBI) at Albany Medical College in New York State in 2005, magazine articles and newspaper stories hailed the arrival of the man once described as "Socrates with a beeper." Now, a month after his abrupt departure, former colleagues are painting a complex portrait that suggests the ethicist's own personal and professional relationships may have led to the institute's undoing.McGee remains a tenured professor at AMBI, and neither he nor college officials will discuss the circumstances surrounding his change in status. Former colleagues, however, say the institute began to unravel shortly after his arrival when Union College in Schenectady, N.Y., severed its longtime educational partnership with AMBI's parent medical school and as disillusioned faculty--accusing the ethicist of everything from forgery to spreading insulting rumors--left. [More]

Nanotech to Regrow Cartilage and Soothe Aching Knees [News]
Lundi 16 Juin 2008 - 16:00 - 5 mois, 2 semaines depuis - Presse spécialisée - Scientific American
Researchers say they may soon be able to repair injured and worn-out cartilage with the help of nanotubes. Currently, patients must either go under the knife to mend faulty cartilage (connective tissue that normally pads the ends of bones at joints to keep them from grinding against one another). But scientists say they may one day be able to insert microscopic carbon nanotubes into injured joints--such as knees--encouraging new, stronger cartilage cells to grow in place damaged or thinning ones. [More]

Any knowledge that might be useful: Leroy Hood [Where Are They Now?]
Lundi 16 Juin 2008 - 11:00 - 5 mois, 2 semaines depuis - Presse spécialisée - Scientific American
FINALIST YEAR: 1956HIS FINALIST PROJECT: Geologic mapping of rock layers in Wyoming [More]

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