ScienceDaily Environment Headlines
for Tuesday, January 11, 2011
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Mountain glacier melt to contribute 12 centimeters to world sea-level increases by 2100 (January 11, 2011) -- Melt off from small mountain glaciers and ice caps will contribute about 12 centimeters to world sea-level increases by 2100, according to new research. ... > full story
New drug target for prion diseases, 'mad cow' (January 11, 2011) -- Scientists have discovered that plasminogen, a protein used by the body to break up blood clots, speeds up the progress of prion diseases such as mad cow disease. ... > full story
Energy limits global economic growth, study finds (January 11, 2011) -- A new study establishes macroecological correlations across countries and over time between per capita gross domestic product and per capita energy use. The authors infer a causal linkage. Correlations between these same two measures and measures of lifestyle quality lead the authors to believe that energy production would have to increase several-fold to support a still-growing world population in the current US lifestyle. ... > full story
H1N1 pandemic flu points to vaccine strategy for multiple flu strains (January 11, 2011) -- Using blood samples from patients infected with the 2009 H1N1 strain, researchers developed antibodies that could bind H1N1 viruses from the last decade, as well as the 1918 flu virus and even H5N1. Some of the antibodies protected mice from a lethal viral dose, even 60 hours post-infection. The antibodies could help researchers in designing a vaccine against a wide spectrum of flu viruses. ... > full story
Catfish study reveals multiplicity of species (January 11, 2011) -- An extensive investigation of South American Corydoras catfish, reveals that catfish communities, although containing almost identically colored and patterned fish, could actually contain three or more different species. Establishing for the first time that many species are mimetic, this discovery suggests that in many cases the number of Corydoras catfish species may be higher than previously recognized, with consequent implications for environmentalists charged with protecting environmental diversity and safeguarding the species. ... > full story
Mosquito nets do not work everytime, researchers find (January 10, 2011) -- Long-lasting insecticidal nets have yielded an important breakthrough in malaria prevention, but this does not automatically mean they always work against diseases transmitted by insect bites. Against the transmission of kala-azar disease in India and Nepal, they did not have an effect, researchers have found. ... > full story
Cancer in a single catastrophe: Chromosome crisis common in cancer causation (January 10, 2011) -- Cancer is most often considered to be the result of accumulation of mutations over time -- often over years. Researchers have found that in one in 40 cases, chromosomes explode in a single event, creating hundreds of fragments and many mutations. The new process is particularly common in bone cancers. Although the cause of the shattered chromosomes is not known, the team suggest possible mechanisms to be studied. ... > full story
Induced pluripotent stem cells from fetal skin cells and embryonic stem cells display comparable potential for derivation of hepatocytes (January 10, 2011) -- Numerous patients suffering from chronic liver diseases are currently receiving inadequate treatment due to the lack of organs donated for transplantation. However, hepatocytes derived from induced pluripotent stem cells (iPSCs) could offer an alternative for the future. Scientists compared hepatocytes from embryonic stem cells with hepatocytes from iPS cells and found that their gene expression is very similar. ... > full story
Extreme obesity associated with higher risk of death for 2009 H1N1 patients (January 10, 2011) -- For those infected with the 2009 pandemic influenza A (H1N1) virus, extreme obesity was a powerful risk factor for death, according to an analysis of a public health surveillance database. In a new study, researchers associated extreme obesity with a nearly three-fold increased odds of death from 2009 H1N1 influenza. Half of Californians greater than 20 years of age hospitalized with 2009 H1N1 were obese. ... > full story
When less is more: How mitochondrial signals extend lifespan (January 10, 2011) -- In making your pro-longevity resolutions, like drinking more red wine and maintaining a vibrant social network, here's one you likely forgot: dialing down your mitochondria. It turns out that slowing the engines of these tiny cellular factories could extend your life-an observation relevant not only to aging research but to our understanding of how cells communicate with each another. ... > full story
Epic journeys of turtles revealed via satellite tracking (January 10, 2011) -- The epic ocean-spanning journeys of the gigantic leatherback turtle in the South Atlantic have been revealed for the first time thanks to groundbreaking research using satellite tracking. Experts in the UK led a five-year study to find out more about these increasingly rare creatures and inform conservation efforts. ... > full story
Atmosphere's self-cleaning capacity surprisingly stable (January 10, 2011) -- The atmosphere's capacity for cleansing itself of air pollutants is more stable than previously thought, according to a new study ... > full story
Double doses of chicken pox vaccine most effective, researchers find (January 10, 2011) -- When vaccinating children against varicella (chicken pox), researchers have found, two doses are better than one. In fact, the odds of developing chicken pox were 95 percent lower in children who had received two doses of the vaccine compared with those who had received only one dose. ... > full story
Antibiotic resistance is not just genetic (January 10, 2011) -- Genetic resistance to antibiotics is not the only trick bacteria use to resist eradication -- they also have a second defense strategy known as persistence that can kick in. Researchers have now demonstrated for the first time that interplay occurs between the two mechanisms to aid bacterial survival. The findings could lead to novel, effective approaches to treat multi-drug resistant infections. ... > full story
Blame the 'chaperone': Mutation in gene essential for correct protein-processing identified (January 10, 2011) -- Scientists have identified a mutation in a gene that's essential for correct protein-processing in cells. Defects in protein folding are associated with a variety of abnormalities and diseases. ... > full story
Grape ingredient resveratrol increases beneficial fat hormone (January 10, 2011) -- Researchers have identified a novel way in which resveratrol, a substance in grapes, exerts positive health effects. ... > full story
Extracting cellular 'engines' may aid in understanding mitochondrial diseases (January 10, 2011) -- Medical researchers who crave a means of exploring the genetic culprits behind a host of neuromuscular disorders may have just had their wish granted by a research team that has performed surgery on single cells to extract and examine their mitochondria. ... > full story
Climate change to continue to year 3000 in best case scenarios, research predicts (January 10, 2011) -- New research indicates the impact of rising carbon dioxide levels in Earth's atmosphere will cause unstoppable effects to the climate for at least the next 1,000 years. ... > full story
Measles viral protein movement described (January 10, 2011) -- Researchers have shown that proteins on the surface of a cell twist a viral protein into position, allowing the virus to start infection and cause disease, all in a movement as graceful as a ballroom dance. ... > full story
Herpes virus' tactical maneuver visualized in 3-D (January 10, 2011) -- For the first time, researchers have developed a 3-D picture of a herpes virus protein interacting with a key part of the human cellular machinery, enhancing our understanding of how it hijacks human cells to spread infection and opening up new possibilities for stepping in to prevent or treat infection. This discovery uncovers one of the many tactical maneuvers employed by the virus. ... > full story
Cellular power plants' 'import business' revealed (January 10, 2011) -- Scientists in Germany have discovered a new signaling path in cells: a mechanism which enables the transport of proteins into mitochondria to be adjusted depending on the current metabolic state of the cell. ... > full story
Biofuel grasslands better for birds than ethanol staple corn, researchers find (January 10, 2011) -- Developing biofuel from native perennials instead of corn in the Midwest's rolling grasslands would better protect threatened bird populations, research suggests. Federal mandates and market forces both are expected to promote rising biofuel production, but the environmental consequences of turning more acreage over to row crops for fuel are a serious concern. ... > full story
The 'mad' Egyptian scholar who proved Aristotle wrong (January 10, 2011) -- Ibn al-Haytham's 11th-century Book of Optics, which was published exactly 1000 years ago, is often cited alongside Newton's Principia as one of the most influential books in physics. Yet very little is known about the writer, considered by many to be the father of modern optics. ... > full story
When it's cool, female butterflies chase males in sex role reversal (January 9, 2011) -- If you want to be surrounded by females on the prowl, it pays to be cool, at least if you are a male butterfly. In an unusual example of sex role reversals, females actively court males after being exposed to cool, dry temperatures as caterpillars, researchers report. Raised in the moist and warmer season as larvae, males take up the traditional roles of suitor, displaying their wing designs to females who do the choosing. ... > full story
Proteins need chaperones: Newly discovered processes in production of proteins described (January 9, 2011) -- Why does a chaperone sitting at the end of the ribosomal tunnel need to possess characteristics that can influence the chromatin structure in the nucleus? Scientists are now a step closer to answering this question. ... > full story
Edible insects produce smaller quantities of greenhouse gasses than cattle (January 9, 2011) -- Insects produce much smaller quantities of greenhouse gases per kilogram of meat than cattle and pigs. Insect meat could therefore form an alternative to more conventional types of meat. ... > full story
Origin of life on Earth: 'Natural' asymmetry of biological molecules may have come from space (January 7, 2011) -- Certain molecules do exist in two forms which are symmetrical mirror images of each other: they are known as chiral molecules. On Earth, the chiral molecules of life, especially amino acids and sugars, exist in only one form, either left-handed or right-handed. Why is it that life has initially chosen one form over the other? Now researchers have for the first time obtained an excess of left-handed molecules (and then an excess of right-handedones) under conditions that reproduce those found in interstellar space. This result therefore supports the hypothesis that the asymmetry of biological molecules on Earth has a cosmic origin. The researchers also suggest that the solar nebula formed in a region of massive stars. ... > full story
Packaging that knows when food is going bad (January 7, 2011) -- Packaging that alerts consumers to food which is starting to go bad is being developed by researchers in the UK. ... > full story
What carbon cycle? College students lack scientific literacy, study finds (January 7, 2011) -- Most college students in the United States do not grasp the scientific basis of the carbon cycle -- an essential skill in understanding the causes and consequences of climate change, according to new research. ... > full story
Scientists construct synthetic proteins that sustain life (January 7, 2011) -- In a groundbreaking achievement that could help scientists "build" new biological systems, Princeton University scientists have constructed for the first time artificial proteins that enable the growth of living cells. ... > full story
Lice DNA study shows humans first wore clothes 170,000 years ago (January 7, 2011) -- A new study following the evolution of lice shows modern humans started wearing clothes about 170,000 years ago, a technology which enabled them to successfully migrate out of Africa. ... > full story
Tomatoes found to contain nutrient which prevents vascular diseases (January 7, 2011) -- They are the most widely produced fruit in the world, and now scientists in Japan have discovered that tomatoes contain a nutrient which could tackle the onset of vascular diseases. The research reveals that an extracted compound, 9-oxo-octadecadienoic, has anti-dyslipidemic affects. ... > full story
Sulfur proves important in the formation of gold mines (January 7, 2011) -- Collaborating with an international research team, an economic geologist has discovered how gold-rich magma is produced, unveiling an all-important step in the formation of gold mines. Robert Linnen found sulfur enhances gold's solubility, and solubility is an important step in forming a gold deposit. The study could lead to a breakthrough in choosing geographic targets for gold exploration. ... > full story
Gulf oil spill: Methane gas concentrations in Gulf of Mexico quickly returned to near-normal levels, surprising researchers (January 7, 2011) -- Calling the results "extremely surprising," researchers found that methane gas concentrations in the Gulf of Mexico have returned to near normal levels only months after a massive release occurred following the Deepwater Horizon oil rig explosion. ... > full story
Co-management holds promise of sustainable fisheries worldwide (January 7, 2011) -- Encouraging new evidence suggests that the bulk of the world's fisheries -- including small-scale, often non-industrialized fisheries on which millions of people depend for food -- could be sustained using community-based co-management. ... > full story
Elevated rates of 'sarcoid-like' granulomatous pulmonary disease in World Trade Center responders (January 7, 2011) -- Researchers coordinating the largest clinical study to date of "sarcoid-like" granulomatous pulmonary disease in World Trade Center (WTC) responders have found that the rate of the condition was increased in this group as compared to the records of pre-9/11 FDNY personnel. ... > full story
Pain therapy for piglets (January 7, 2011) -- Piglets of different age groups have a unique ability to break down and excrete painkillers, according to new research. Painkilling and anti-inflammatory effect of medicines studied work to varying degrees on piglets. ... > full story
Atlantic sturgeon recovery efforts may benefit from new study tracking oceanic migrations (January 7, 2011) -- A first-of-its-kind study that tracked the oceanic migrations of adult Atlantic sturgeon that were caught and tagged in the Hudson River discovered that these fish move vast distances in the Atlantic Ocean, traveling as far south as Georgia and as far north as Nova Scotia, Canada. The findings indicate that recovery of Atlantic sturgeon fisheries will need to address long-range oceanic threats to the species in addition to local measures closer to spawning grounds. ... > full story
New method to quantify protein changes could advance study, treatment of various diseases including cancer (January 7, 2011) -- New research has yielded a novel method of analyzing and quantifying changes in proteins that result from a common chemical process. The findings could provide new insights into the effects of a highly destructive form of stress on proteins in various disease models, particularly cancer. ... > full story
Using cassava to address vitamin A deficiency (January 7, 2011) -- Cassava is an important food source in many poverty-stricken regions of the world, including sub-Saharan Africa, but the low levels of micronutrients in commercial varieties do little to address hidden hunger. New research shows that a single, naturally arising change in one gene leads to high provitamin A levels in cassava roots and opens the door to addressing vitamin A deficiency via biofortified cassava. ... > full story
Border collie comprehends over 1,000 object names as verbal referents (January 6, 2011) -- Researchers at Wofford College discovered that a border collie comprehends the names of over 1,000 objects, differentiating between names of objects and orders to fetch them. This research deepens the findings of researchers in Germany, who had discovered a dog that knew the names of a couple of hundred objects. Important questions were left open as to how far a dog could go, and whether the dog really understood that the object names were nouns and not commands to retrieve the object. ... > full story
Hidden literary references discovered in the Mona Lisa (January 6, 2011) -- The Leonardo da Vinci masterpiece, the Mona Lisa, incorporates images inspired by the Roman poet Horace and Florentine poet Petrarch, according to one expert. ... > full story
Carbon swap bank to beat climate change, Australian researchers propose (January 6, 2011) -- Australian researchers have suggested that nations should abandon the concept of carbon emissions trading in favor of a carbon swap bank that might lead to genuine reductions in the amount of carbon dioxide greenhouse gas entering the atmosphere and so provide a mechanism for reducing climate change. ... > full story
Household sewage: Not waste, but a vast new energy resource (January 6, 2011) -- In a finding that gives new meaning to the adage, "waste not, want not," scientists are reporting that household sewage has far more potential as an alternative energy source than previously thought. They say the discovery, which increases the estimated potential energy in wastewater by almost 20 percent, could spur efforts to extract methane, hydrogen and other fuels from this vast and, as yet, untapped resource. ... > full story
Widespread, persistent oxygen-poor conditions in Earth's ancient oceans impacted early evolution of animals (January 6, 2011) -- Researchers report that the transition from a generally oxygen-rich ocean during the Cambrian to the fully oxygenated ocean we have today was not a simple turn of the switch, as has been widely accepted. Their work shows the ocean fluctuated between oxygenation states 499 million years ago; such fluctuations, they say, played a major, perhaps dominant, role in shaping the early evolution of animals on the planet. ... > full story
How studded winter tires may damage public health, as well as pavement (January 6, 2011) -- Scientists are reporting new evidence on how studded tires -- wintertime fixtures in some areas but banned in others for causing damage to pavement -- may also damage the health of motorists and people living near highways. Studded tires have small metal protrusions from the rubber tread that improve traction on icy or snow-covered roads. ... > full story
Is the hornet our key to renewable energy? Physicist discovers that hornet's outer shell can harvest solar power (January 6, 2011) -- The brown and yellow parts of the Oriental hornet's body are able to harvest solar energy, and if that function can be mimicked, a novel way of achieving high-efficiency solar energy collection might be just around the corner, says a physicist who has demonstrated that the brown and yellow stripes on the insect's abdomen can absorb the sun's radiation, and the yellow pigment transforms that radiation into electric power. ... > full story
Protective properties of green tea uncovered (January 6, 2011) -- When green tea is digested it is even more effective at protecting the body against Alzheimer's and cancer than was previously thought. ... > full story
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