December 3, 2012 |
After much hype, NASA's Curiosity rover just may have found signs of organic compounds on the Red Planet. But not so fast, Mars Science Laboratory researchers said Monday. The rover has scooped and sampled what appear to be chlorinated organic molecules at a site called Rocknest, but scientists are not yet sure if the part that makes them organic is native to Mars or is a molecular hitchhiker from Earth, said Paul Mahaffy, lead investigator for Sample Analysis at Mars, one of the lab instruments in Curiosity's belly.
September 14, 2012 |
Chlorine: Inexpensive and easily available, chlorine is the chemical most commonly used in swimming pools and hot tubs to kill bacteria that can spread disease. Used in concentrations of 1 to 4 parts per million, chlorine helps keep pool water at the recommended pH level of 7.2 to 7.8. However, chlorine breaks down into different chemicals that have been blamed for itchy skin, difficulty breathing, asthma and other ailments. If released into the environment, chlorine can cause low-level harm to organisms living in the water and soil, according to the U.S. Environmental Protection Agency.
HOME & GARDEN
September 14, 2012 |
Chlorine has long been the industry standard to keep pool water clean and clear, but consumer demand for alternatives has prompted the emergence of new technologies, including the saltwater systems that came into vogue a few years ago and the copper-and-silver ionization and ozone-gas systems that are increasingly popular. "I don't like the stuff that goes into swimming pools," said Philip Daughtry, a Topanga Canyon poet who often swims in the koi pond he refers to as his "backcountry swimming hole.
HOME & GARDEN
May 28, 2011
Jamie Durie tweaked his 1950s swimming pool into what he calls a "sunken lounge," complete with a new bench inside the entire perimeter so there's cool seating for party guests. "People can actually sit and spend time here," Durie says. He worked with Aric Entwistle of Los Angeles-based H2O Development Inc. to replace a conventional chlorine system with SpectraLight ,which uses ultraviolet light to kill waterborne pathogens. The renovated pool is solar heated with a system from Suntopia Solar . A new edge was fabricated over the original coping using carbon fiberglass, resin and several coats of waterproofing.
July 28, 2010 |
They sent army doctors, police and hand-selected veterinarians to rescue her, but after three hours at a hospital, nothing could save Quan Quan, the beloved giant panda at the Jinan Zoo in Shandong province. On Tuesday, six days after Quan Quan's death, officials said that poisonous gas had killed the 21-year-old panda, dubbed a "heroic mother" by state media for giving birth to seven cubs over the years. An autopsy revealed that Quan Quan, who was about 70 in panda years, died after inhaling carbon monoxide and chlorine from a former air raid shelter that was being disinfected.
June 6, 2010 |
Southern California in the summertime is famous for its pool parties, pool games and even its pool boys. But a pool opera? In 2008, the Long Beach Opera debuted a production of Ricky Ian Gordon's "Orpheus and Euridice" at the indoor Belmont Plaza Olympic Pool. The song cycle, which starred soprano Elizabeth Futral and clarinetist Todd Palmer, enacted the ancient Greek myth using a small boat that floated up and down the chlorinated "River Styx." Next weekend, the company is reviving the high-concept production with the same cast and an enhanced instrumental component — a larger string ensemble plus a slightly expanded score by Gordon.