ScienceDaily Environment Headlines
for Sunday, April 17, 2011
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Online calculator allows households to track carbon footprint (April 16, 2011) -- A new analysis of the carbon footprints of households around the U.S. shows that consumers need different strategies in different cities to reduce their greenhouse gas emissions. An online "carbon calculator" helps consumers decide how to change their lifestyles for the maximum reduction in their footprints. ... > full story
Non-lethal way of switching off essential genes in mice perfected (April 16, 2011) -- Switching off an essential gene to study its function is problematic because shutting off its activity permanently will kill the organism before the gene's function can be determined. Researchers have overcome this problem by using RNAi technology to temporarily turn off any essential gene in adult mice and then turn it back on before the change kills the animals. ... > full story
Dietary yeast extracts tested as alternative to antibiotics in poultry (April 16, 2011) -- A dietary yeast extract could be an effective alternative to antibiotics for poultry producers, according to a new study. Microbiologists have been studying the effects of yeast extract as an immune stimulant and alternative to antibiotics in conventional turkeys. Non-pharmaceutical remedies and preventatives are particularly needed for organic poultry production. ... > full story
Africa the birthplace of human language, analysis suggests (April 15, 2011) -- A new study by a New Zealand researcher provides strong evidence for Africa as the birthplace of human language. An analysis of languages from around the world suggests that, like our genes, human speech originated -- just once -- in sub-Saharan Africa. The research studied the phonemes, or the perceptually distinct units of sound that differentiate words, used in 504 human languages today and found that the number of phonemes is highest in Africa and decreases with increasing distance from Africa. ... > full story
Childhood eczema and hay fever leads to adult allergic asthma, study finds (April 15, 2011) -- Children who have eczema, particularly when occurring with hay fever, are nine times more likely to develop allergic asthma in their 40s, a new study reveals. ... > full story
US meat and poultry is widely contaminated with drug-resistant Staph bacteria, study finds (April 15, 2011) -- Drug-resistant strains of Staphylococcus aureus, a bacteria linked to a wide range of human diseases, are present in meat and poultry from US grocery stores at unexpectedly high rates, according to a new study. ... > full story
Forest byproducts, shells may be key to removing radioactive contaminants from drinking water (April 15, 2011) -- A combination of forest byproducts and crustacean shells may be the key to removing radioactive materials from drinking water, researchers have found. ... > full story
The eyes have it: Dinosaurs hunted by night (April 15, 2011) -- The movie Jurassic Park got one thing right: those velociraptors hunted by night while the big plant-eaters browsed around the clock, according to a new study of the eyes of fossil animals. ... > full story
Humpback whale songs spread eastward like the latest pop tune (April 15, 2011) -- Humpback whales have their own version of the hit single, according to a new study. At any given time within a population, male humpbacks all sing the same mating tune. But the pattern of the song changes over time, with the new and apparently catchy versions of the song spreading repeatedly across the ocean, almost always traveling from west to east. ... > full story
Studies of marine animals aim to help prevent rejection of transplanted organs (April 15, 2011) -- Studies of the small sea squirt may ultimately help solve the problem of rejection of organ and bone marrow transplants in humans, according to scientists. ... > full story
Sensor determines if packaged meat has spoiled (April 15, 2011) -- When it comes to packaged fish or meat, it is nearly impossible to distinguish between fresh goods and their inedible counterparts. Researchers have now developed a sensor film that can be integrated into the package itself, where it takes over the role of quality control. And if the food has spoiled, it changes color to announce the fact. ... > full story
Pig stem cell transplants: The key to future research into retina treatment (April 15, 2011) -- Scientists studying the role of stem cells in repairing damaged retina tissue have found that pigs represent an effective proxy species to research treatments for humans. The study demonstrates how stem cells can be isolated and transplanted between pigs, overcoming a key barrier to the research. ... > full story
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