In the News
Hepatitis C Helicase Unwinds DNA In A Spring-loaded, Three-step Proces
The process by which genes are duplicated is mysterious and complex, involving a cast of characters with diverse talents and the ability to play well with others in extremely close quarters. A key player on this stage is an enzyme called a helicase. Its job is to unwind DNA or RNA so that another enzyme, a polymerase, can faithfully copy each nucleotide in the genetic code. A study to appear in Science sheds new light on how the hepatitis C helicase plays this role. Aging In Salmon Depends On Choosy Bears
According to George Bernard Shaw: "We don't stop playing because we grow old; we grow old because we stop playing."But how fast does that aging occur once started? In the case of populations of salmon in Alaska studied by Stephanie Carlson and colleagues at the University of Washington and McGill University and reported on in this week's PLoS ONE, it all depends on how choosy are the bears which feed on them. Space Debris: Assessing The Risk
Assessing the risk that space debris pose to operational spacecraft and satellites is a challenge and depends on whether you are worried about being hit by a known, tracked debris object or by an unknown object. At least the known objects are, well, known. These include old spacecraft, other satellites, rocket bodies and large fragments from past break-ups. First Beehives In Ancient Near East Discovered
Archaeologists revealed that the first apiary (beehive colony) dating from the Biblical period has been found in excavations in Israel's Beth Shean Valley. This is the earliest apiary to be revealed to date in an archaeological excavation anywhere in the ancient Near East, according to the researcher. Statin Plus Cancer Drug Deliver Combo Punch To Brain Cancer Cells
Building on newly discovered genetic threads in the rich tapestry of biochemical signals that cause cancer, a Johns Hopkins Kimmel Cancer Center team has dramatically killed brain cancer cells by blocking those signals with a statin and an experimental antitumor drug. U.S. Environmental Protection Agency (EPA): Agriculture Street Landfil
"This web page provides background information and details about the Agriculture Street Landfill Superfund Project in New Orleans"that began in 1998. Includes updates on water sampling and other EPA activities related to flood cleanup after Hurricane Katrina of this Superfund site that housed "debris and waste resulting from cleanup efforts in the aftermath of Hurricane Betsy"and that was found to have "elevated levels of lead, arsenic and carcinogenic polyaromatic hydrocarbons (cPAHs)." The Missing Peace: Artists Consider the Dalai Lama
Website for this traveling "multi-media art exhibition that brings together 88 respected artists representing 30 countries. With the full life of the Dalai Lama as inspiration, the intention for this project is to shift the world's attention towards peace."The virtual tour contains images of many of the works with descriptions, and curriculum materials. Also on the website are biographies of the artists, venue details, and news. From the Committee of 100 for Tibet. Misuse Of Antibiotics Not The Only Cause Of Resistance, Says Report
The perception that antibiotic resistance is primarily the undesirable consequence of antibiotic abuse or misuse is a view that is simplistic and inaccurate, according to a recent report by the American Academy of Microbiology. Intimate Abuse Study Finds Clear Links With Poor Health And Calls For
Nearly a quarter of married and cohabiting women who took part in a survey said that they had been sexually, psychologically or physically abused by their partner. Researchers who studied the 2,746 responses found a clear link between abuse and poor health and are calling for policy initiatives to help primary care nurses tackle the problem in a holistic way. 18.2 per cent of the respondents had been psychologically abused, 3.3 per cent had been physically abused and 1.3 per cent had been sexually abused. Structure, Deformation, and Strength of the Loma Prieta Fault In Calif
Researchers analyzes over a thousand aftershocks of the 1989 Loma Prieta earthquake, which occurred along the San Andreas Fault system in northern California. It determines details of the fault structure from aftershock alignments at different scales in the fault zone, and the authors used the slip directions on local groups of aftershock faults to map the variations in deformation throughout the fault zone. The main fault is about 60 km long, and is defined by three segments that form a 20°bend, shaped like an open 's'.
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