Massive duplication of genes may solve Darwin's 'abominable mystery' about flowering plants
... explain their sudden evolution." One unexpected observation from the study is the relatively slow accumulation...enome duplications previously has relied on direct observation of genomes that have been completely sequenced. Arabidopsis, for example, the first plant whose gen...Studies shed new light on why exercise can protect against skin and bowel cancers
... end of the study than the non-exercising mice an observation that might be due to the fact that the exercising mice were healthier, while the health of the non-exercising mice was beginning to decline due to higher numbers of polyps. There were higher levels of hormones known to be associated with the onset of...Gene first linked to rare disease may trigger skin cancer, other tumors
...ts ubiquitous expression pattern and with a recent observation showing that CYLD levels are downregulated in several other tumors such as kidney, liver, and uterine cervix." The researchers are now further examining their CYLD-deficient mice to find out whether the animals also show an increased prevalence of co...Gene expression becomes heterogeneous with age in humans and rats
...nd the University of Cambridge. One long-standing observation concerning the physiological decline that accompanies aging is its variability--some people age better than others. However, there has thus far been little or no evidence supporting the existence of similar heterogeneity at the level of gene expressi...UGA study reveals a new way of looking at vaccine development
...uting time on a cluster of 16 machines lead to the observation that the acidic side chains give the backbone of the surface sugars in type III Group B Streptococcus an extended, corkscrew-like shape that is not rigid, but coils around like a phone cord. When the immune system "sees" this helical shape, it produc......tioned to be an ocean (and atmosphere) time-series observation station for the region, from which Oman can monitor the timing and intensity of upwelling, the productivity of the deep-ocean ecosystem, and dust input from the Euphrates Valley. Smith has proposed to conduct from Masirah Island thrice-weekly collect...... more about this unique process. WHAT: First-hand observation and interviews with field scientists aboard a special marine research and diving vessel, including an opportunity to snorkel with the scientists (snorkeling equipment not provided). WHO: Space is limited to just 12 reporters. First come, first serv...Taking evolution's temperature: Researchers pinpoint the energy it takes to make a species
...ecies seem to exist near the equator, a scientific observation made even before naturalist Charles Darwin set sail to South America on the H.M.S. Beagle nearly two centuries ago. It may also have a bearing on concepts such as global warming and efforts to preserve diversity of life on Earth. "We've shown that th...Explore frontiers of science at June 7 congressional exhibition
...ce dynamics of earth, water and life; ecological observation through a national network; ocean observatories & expeditions; prospecting in a microbial world; disease prediction and treatment design; understanding genomics of maize and roots; gas-phase synthesis of nanostructured materials; insights ...Other highlights in the June 7 JNCI
... Institute in Bethesda, Md., point to the clinical observation that link high tumor expression of uPA with poor prognosis and discuss differences between the experimental mouse model and human cancer. They write, "the study by Merchan et alraises important unresolved questions relative to the role of PAs in canc...Activation of microRNA inhibits cancer gene in human cancer cells
...ed miRNAs in cancer development and has led to the observation that some miRNAs are reduced in various human cancers and may normally function as tumor suppressors. According to study author Dr. Peter A. Jones from the Norris Comprehensive Cancer Center at the University of Southern California in Los Angeles, "A...Retired FSU professor captures a 'living fossil' on video
...t of a typical squirrel. Perhaps the most striking observation is how the animal walks -- like a duck. Clearly not adapted to climbing trees, the rock rat exhibits a duck-like waddle with its hind feet splayed out at an angle to its body.An avid but otherwise amateur wildlife observer, Redfield has traveled the ...Butterfly speciation event recreated
... nearly identical to a known wild species, and the observation that hybrid individuals don't mate with either parent species, provides the most convincing case to-date for homoploid hybrid speciation in animals. Co-author Mauricio Linares (University of the Andes, Colombia) had long suspected that H. heurippa, ...Researchers find new clues to biochemistry of 'anti-aging'
...o life extension and healthy aging," he says. "The observation that caloric restriction extends life span and appears to reduce the risk of diabetes in animal models only underscores the importance of metabolic pathways." Denu plans to take advantage of the calorie restriction research program that has been unde...Baby girls born to mothers burdened by stress may be at risk for fibromyalgia
...a standardized measure of psychological stress, an observation that supported findings in animal studies. Furthermore, low cortisol levels were only observed in patients with a history of prenatal stress. While more study is needed, results collected so far provide strong evidence that girls may be at added risk...Eighty below and loving it: Montana State University scientists to get new cold lab
...cubic foot. The facility will also house a cold observation lab, where students can watch sub-zero experiments through windows while still in the comfort of room temperature. In a structural lab various materials - such as highway concrete - will be stressed under cold temperatures. A wet lab where running wa...Earth observation satellites contribute to international polar year 2007-2008
... Opportunity ESA will provide access to Earth observation data free of charge to selected projects covering the Arctic and Antarctic regions. Data, as well as the exploitation of historical archives, from the following missions will be made available: ESA's Envisat, ERS 1 and -2, GOCE and SMOS (when availab...How parachute spiders invade new territory
...how mathematical models and traditional bioscience observation come together: "To really understand the factors at play on ballooning spiders we need to watch them in action. We have already observed spiders ballooning through still air and we are now planning to take them into a wind tunnel to watch how they ha...JCI Table of Contents: July 13, 3006
...ere may be clinical consequences, particularly the observation of anti-inflammatory effects, in individuals undergoing exposure to the wide variety of drugs that are also SXR agonists. TITLE: Mutual repression between steroid and xenobiotic receptor and NF-kappaB signaling pathways links xenobiotic metabolism ......geneous disease, made up of various subtypes. This observation has led to speculation that breast tumours are derived from different cell types that could include the breast stem cell or its descendents that have suffered genetic accidents. This possibility has generated great interest in understanding the com...