ScienceDaily Environment Headlines
for Saturday, September 6, 2008
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Ebola Cell-invasion Strategy Uncovered (September 5, 2008) -- Researchers have discovered a key biochemical link in the process by which the Ebola Zaire virus infects cells -- a critical step to finding a way to treat the deadly disease produced by the virus. ... > full story
What Is A Gene? Media Define the Concept In Many Different Ways (September 5, 2008) -- Even scientists define ‘a gene’ in different ways, so it comes as little surprise that the media also have various ways of framing the concept of a gene, according to a new study. ... > full story
Designer Wine? Characterization Of Grapevine Transposons May Aid Development Of New Grape Varieties (September 5, 2008) -- A new study presents a genome-wide characterization of grapevine transposons. This work shows that transposons have captured and amplified gene sequences in grapevines, which could have had an impact on gene evolution and their regulation. ... > full story
Infectious, Test Tube-produced Prions Can Jump The 'Species Barrier' (September 5, 2008) -- Researchers have shown that they can create entirely new strains of infectious proteins known as prions in the laboratory by simply mixing infectious prions from one species with the normal prion proteins of another species. ... > full story
How Salmonella Bacteria Contaminate Salad Leaves (September 5, 2008) -- How does Salmonella bacteria cause food poisoning by attaching to salad leaves? A new study shows how some Salmonella bacteria use the long stringy appendages they normally use to help them "swim" and move about to attach themselves to salad leaves and other vegetables, causing contamination and a health risk. ... > full story
DNA Shows That Last Woolly Mammoths Had North American Roots (September 5, 2008) -- In a surprising reversal of conventional wisdom, a DNA-based study has revealed that the last of the woolly mammoths--which lived between 40,000 and 4,000 years ago--had roots that were exclusively North American. ... > full story
Biocontrol Insect Exacerbates Invasive Weed (September 5, 2008) -- Biocontrol agents, such as insects, are often released outside of their native ranges to control invasive plants. But scientists in Montana have found that through complex community interactions among deer mice, native plants and seeds, the presence of an introduced fly may exacerbate the effects of the invasive plant it was meant to control. ... > full story
DNA Editing Tool Flips Its Target (September 5, 2008) -- Imagine having to copy an entire book by hand without missing a comma. Our cells face a similar task every time they divide. They must duplicate both their DNA and a subtle pattern of punctuation-like modifications on the DNA known as methylation. Scientists have caught in action one of the tools mammalian cells use to maintain their pattern of methylation. Visualized by X-ray crystallography, the SRA domain of the protein UHRF1 appears to act like a bookmark while enzymes are copying a molecule of DNA. ... > full story
Global Sea-rise Levels By 2100 May Be Lower Than Some Predict, Says New Study (September 5, 2008) -- Despite projections by some scientists of global seas rising by 20 feet or more by the end of this century as a result of warming, a new study concludes that global sea rise of much more than 6 feet is a near physical impossibility. ... > full story
New Evidence On Folic Acid In Diet And Colon Cancer (September 5, 2008) -- Researchers are reporting a new, more detailed explanation for the link between low folate intake and an increased risk for colon cancer, the second leading cause of cancer death in the United States. ... > full story
Hurricane Gustav's Path And Development (September 5, 2008) -- The development and path of Hurricane Gustav is shown via a sequence of satellite images acquired by Envisat's Medium Resolution Imaging Spectrometer (MERIS) instrument on 25 August, 28 August, 30 August and 1 September 2008 (from right to left). ... > full story
Molecular Evolution Is Echoed In Bat Ears (September 4, 2008) -- Echolocation may have evolved more than once in bats, according to new research from the University of Bristol. ... > full story
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