Science & Technology for Tuesday October 5, 2010

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Robot legs for the paralyzed coming SAN ANTONIO (UPI) -- An Israeli company says it hopes to have a wearable "walker" on the market by the second half of 2011 that will allow paralyzed persons freedom of movement. The ReWalk, developed by Argo Medical Technologies, consists of lightweight leg supports with motorized hip and knee joints, equipped with tilt sensors and a computer worn as a backpack, the San Antonio Express-News reported Monday. Once strapped in, the wearer leans forward, and tilt sensors signal the computer to move the motorized joints of one "leg" and move it forward. As the wearer continues to lean, the other leg takes a step and the process of walking begins. In an eight-week trial beginning in August, patients have spent several hours at a time three or four times a week testing the ReWalk. Elaine Loyola has been one of them. The gymnast and cheerleader at a Texas high school was 16 when she was paralyzed from her rib cage down in a 2008 one-car rollover accident. She says she'd love to someday own a ReWalk. Her mother is already teasing her about planning fundraisers, she says. "I tell friends that the ReWalk is like an early version of the cell phone," she says. "They used to be big as a brick. Today, they're small and sleek, like an iPhone." Copyright 2010 by United Press International
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Michigan says it developed stem cell line ANN ARBOR, Mich. (UPI) -- University of Michigan researchers said Sunday they have created a line of human embryonic stem cells that will spur the state's medical research industry. The cell line, known as UM4-6, was developed under a 2008 program approved by Michigan voters that allows the development of stem cells from unused human embryos obtained from fertility clinics. The new cells will be made available to researchers at the Ann Arbor campus and other facilities around Michigan, the university said in a written statement. The UM4-6 could also be made available to other researchers if a federal court eventually rejects a ban on federal funding for research involving embryonic stem cells. "We've spent a lot of time making sure that our entire process is in compliance with the National Institutes of Health guidelines for registering embryonic stem cell lines so that other scientists will be able to use these lines to conduct NIH-funded research," said Gary Smith, co-director of the Consortium for Stem Cell Therapies. Smith told the Detroit Free Press that the UM-4-6 cell line began with 30 cells that have since grown to millions of cells that retain their embryonic characteristics. "We're almost teaching ourselves," Smith said. "No one here has done that -- derived their own stem cell lines." The Michigan scientists will discuss UM4-6 project further at this week's World Stem Cell Summit in Detroit. Copyright 2010 by United Press International
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Toxic chemicals multiply after Gulf leak CORVALLIS, Ore. (UPI) -- The BP oil disaster sent carcinogenic chemical levels soaring in the Gulf of Mexico, researchers said. Kim Anderson, an environmental toxicology professor at Oregon State University, told the Los Angeles Times she found a 40-fold increase in polycyclic aromatic hydrocarbons off the Louisiana coast from May to June. "It's an incredibly huge jump in concentration in a natural environment," she said. Anderson's team started testing weeks after the April 20 well blowout, taking water samples at four locations near the shore. Results from early August, after the well was capped and stopped leaking, continued to show elevated levels. The amount of PAHs in crude oil varies, as does the toxicity of the compounds, which constitute a large class of chemicals. Some are carcinogenic, some are not and some are not toxic, Anderson said. Her samples included PAHs of all three types. Lisa Faust of the Louisiana Department of Health and Hospitals said state testing of seafood harvest areas had not detected harmful levels of the pollutant, the Times reported Friday. Copyright 2010 by United Press International
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NASA official: Moon still matters WASH., D.C. (UPI) -- NASA new direction of sending astronauts to the asteroids or Mars doesn't mean a return to the moon is out of the question, the U.S. agency's deputy head says. NASA Deputy Administrator Lori Garver said the moon has a role to play in the new space exploration plan set by President Barack Obama and approved by Congress this week. "Lunar science and lunar exploration is alive and well in NASA," Garver told SPACE.com. Obama's plan cancels NASA's moon-oriented Constellation program, initiated by former President George W. Bush, which sought to return astronauts to the moon by 2020. But the moon is a symbol of inspiration for many people in part because of NASA's manned lunar landings of the late 1960s and early 1970s, and the moon is also the most visible of off-world destination to the public, Garver said. "I just won't agree that this ends the moon as a destination," Garver said. "We look up in the night sky and see the moon and it is an inspiration to us all.'" The NASA authorization bill approved by Congress outlines the need for the United States "to sustain a human presence in space," Garver said. "And the moon is part of any long-term sustainable presence in space," Garver said. Copyright 2010 by United Press International
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Safe and Simple Halloween Costumes Help your kids pick out fun costumes this year that will also keep them safe -- read up on color choices that will keep them visible during the dusk hours. More tips like these, as well as decorating tips, trivia quizzes, and free book samples from BookDaily, are available from ArcaMax's Halloween feature. -- From the ArcaMax editors
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