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Tag: "ration" at biology news

Termites feed through good vibrations

Discovery that termites use vibrations to choose the wood they eat may provide opportunities to new methods of reducing infestations in homes and also may provide insights into the "cocktail party effect" of signal processing ?how to ignore most noise but have some signals that trigger attention ?that may prove useful in artificial intelligence. .. CSIRO entomologist Theo Evans says laboratory ex...

Vital step in cellular migration described by UCSD medical researchers

A vital molecular step in cell migration, the movement of cells within the body during growth, tissue repair and the body's immune response to invading pathogens, has been demonstrated by researchers in the University of California, San Diego (UCSD) School of Medicine. Published in the March 27 online edition of Nature Cell Biology and the journal's upcoming April print edition, the study describ...

Harmful Bacterium Commonly Found in Poultry May Survive Refrigeration and Frozen Storage Combined

Glia appear essential for 'hair cells'.responsible for hearing and balance. Traditionally viewed as supporting.actors, cells known as glia may be essential for the normal development.of nerve cells responsible for hearing and balance, according to new.University of Utah research. The study is reported in the January 6,.2005 issue of Neuron and is co-authored by scientists at the University.of Was...

Sexual cooperation: Mating increases longevity in ant queens

The phenomenon of sexual conflict is a powerful driving force in the evolution of reproductive biology for many animal species. Males often try to manipulate their female mates during copulation--for example, by traumatic inseminations (as in the case of bed bugs) or by the transfer of toxic seminal fluids (as in the case of the fruitfly Drosophila). These manipulations are beneficial to males be...

LUCA technologies confirms real-time methane generation

Luca Technologies LLC today announced that its researchers have confirmed the presence of a resident, methane-generating community of microorganisms ("microbial consortium") in substrate samples taken from the 110,000 acre Monument Butte oilfield located in North Eastern Utah. This site represents the latest in a series of active "GeobioreactorsTM" that Luca Technologies has identified since its...

New component of the 'brakes' on nerve regeneration found

Among the principal obstacles to regenerating spinal cord and brain cells after injury is the "braking" machinery in neurons that prevents regeneration. While peripheral nerves have no such machinery and can readily regenerate, central nervous system (CNS) neurons have their brakes firmly in place and locked. .. . The two grou...

Anti cancer virotherapy well tolerated in first human administration, research finds

An international medical conference here heard that an Australian developed anti-cancer therapy based on the use of a common cold virus to control cancer cell growth has begun safety testing in human subjects. .. . .. Professor Shafren has previously tested this virotherapy on cancer...

Cooperation is key—a new way of looking at MicroRNA and how it controls gene expression

A group of scientists at The Scripps Research Institute is reporting a discovery that sheds light on an area of research fundamental to everything from the normal processes that govern the everyday life of human cells to the aberrant mechanisms that underlie many diseases, including cancer and septic shock. .. .. All genes expressed in the human body must be transcribed as mRNA before they can be...

Integration of Agilent's MS technology, Proteome Systems' software to help scientists in proteomics research

Agilent Technologies Inc. (NYSE: A) and Proteome Systems, a leading international proteomics company, today announced they have signed a marketing agreement to collaborate on an integrated solution for the analysis of glycoproteins, molecules that are important in the study of many diseases, including cancer, influenza and arthritis. Under the agreement, Proteome Systems will make its GlycomIQ so...

Putting ecology back into river restoration

An ambitious plan is under way in the ecological community to agree a set of standards for ecologically successful river restoration. The plan is being led by the British Ecological Society's Journal of Applied Ecology, which this month is publishing a special profile on river restoration. Opening the debate is a paper by 22 leading US river ecologists proposing five criteria for ecologically suc...

Innovative collaboration brings Arctic science into the classroom

An upcoming expedition to study the Yukon and Mackenzie Rivers is not simply a research project for R. Max Holmes, an associate scientist at The Woods Hole Research Center. It is also a means to integrate education and outreach into his work. . In June and July, Dr. Holmes, an ecosystem scientist with broad interests in the responses and feedbacks of ecosystems to environmental and global change,...

Nature provides inspiration for important new adhesive

Researchers from the College of Forestry at Oregon State University have developed a new group of adhesives that may revolutionize a large portion of the wood products industry, and have important environmental and economic benefits. . .. Li observed mussels being pounded by ocean waves, and wondered how...

Butterfly migration could be largest known

Millions of painted lady butterflies that fluttered into California's Central Valley in the last week of March could be just the advance guard of one of the largest migrations of the species on record, said Arthur Shapiro, a professor and expert on butterflies at UC Davis. . .. Shapiro said he is getting reports of "billions" of butterflies around Trona, near Death Valley, and in the San Fernando...

Next Generation Body Scanner Launched By The University Of Manchester

The first `next generation' MRI (magnetic resonance imaging) body scanner in the world will be officially launched at Hope Hospital later this week (Friday 18 th February). .. .. The state-of-the-art technology involved will revolutionise the way scanning takes place and means that higher quality scans can be carried out at a much faster speed than ever before. The scanner will enable researchers...

Pair of cancer genes found to drive both cell migration and division

Johns Hopkins researchers have found that two genes already known to control cell movement are also needed for proper cell division. They report their findings in the April issue of Developmental Cell. . .. "In cancer, you sometimes see cells failing to d...

15 generations of untrained jocks, couch potatoes show big physiological adaptations

So, you don't like to exercise? Maybe you could blame it on your great-great-grandparents. Similarly, if you're a practiced and proud couch potato who suddenly woke up to the fact that you're a "natural" athlete, the credit could also belong to your genes. . Exercise research traditionally has focused on the effects of training, rather than underlying genetic mechanisms. But physiologists wondere...

Leprosy genome tells story of human migrations, French researchers report in Science

A French genetics study comparing strains of leprosy-causing bacteria has revealed some surprises about how the pathogen evolved and how it was spread across the continents by human migrations. The research, led by scientists at the Pasteur Institute in Paris, appears in the 13 May issue of the journal Science, published by AAAS, the nonprofit science society. .. The findings indicate that the wo...

Researchers feed tiny pills of RNA to planarians to identify genes essential for regeneration

University of Utah researchers-feeding microscopic pills of RNA to quarter-inch long worms called planarians-have identified many genes essential to understanding a biological mystery that has captivated scientists for hundreds of years: regeneration. .. . The study, to be published in the May issue of Developmental Cell, employed the first lar...

New Scripps Oceanography project to study sediments and ecosystem restoration in Venice lagoon

Scripps Institution of Oceanography at the University of California, San Diego, in conjunction with Italy's Venice Water Authority, Consorzio Venezia Nuova and Thetis SPA, has launched a multifaceted scientific program aimed at providing fundamental information about the effects of sediment translocation in Venice lagoon, a vital facet of the historic city of Venice, Italy. . The new effort, a tw...

Rensselaer researchers develop approach that predicts protein separation behavior

Applying math and computers to the drug-discovery process, researchers at Rensselaer Polytechnic Institute have developed a method to predict protein separation behavior directly from protein structure. This new multi-scale protein modeling approach may reduce the time it takes to bring pharmaceuticals to market and may have significant implications for an array of biotechnology applications, inc...

Tissue regeneration operates differently than expected

Max Planck researchers in Bad Nauheim discover the mechanism by which adult stem cells are integrated into skeletal or heart muscle tissue. .There is disagreement, however, about the mechanism on which repair processes are based. Scientists from the Max Planck Institute for Heart and Lung Research in Bad Nauheim, Germany, in co-operation with colleagues from Martin Luther University in Halle-Witt...

Climate change will affect carbon sequestration in oceans, model shows

An Earth System model developed by researchers at the University of Illinois at Urbana-Champaign indicates that the best location to store carbon dioxide in the deep ocean will change with climate change. . .. "Through a numbe...

New amphibian species result from exploration, not from rule changes

Researchers have discovered amphibian species at an accelerating rate in recent decades, with over 1,000 new ones recognized between 1992 and 2003. At the same time, amphibians are, for reasons not entirely clear, declining more rapidly than either mammals or birds, underscoring the importance of an accurate evaluation. . An analysis published in the August 2005 issue of BioScience, the monthly j...

New understanding of regeneration gained by Forsyth scientists

Forsyth Institute research with the flatworm, planaria, offers new clues for understanding restoration of body structures. Researchers at The Forsyth Institute have discovered how the worm's cells communicate to correctly repair and regenerate tissue. Forsyth scientists have found that gap-junction (microscopic tunnels directly linking neighboring cells) communication contributes to this signali...

GROWing the next generation of water recycling plants

A vegetated rooftop recycling system has been developed that allows water to be used twice before it is flushed into the communal waste water system. . .. .. So-called grey water f...

New compound stops brain cell degeneration in Alzheimer's disease

Drug discovery researchers at Northwestern University have developed a novel orally administered compound specifically targeted to suppress brain cell inflammation and neuron loss associated with Alzheimer's disease. . .. As described in the Jan. 11 issue of the Journal of Neuroscience, the compound, called MW01-5-188WH, selectively inhibits production of pro-inflammatory proteins called cytokine...

Spring migration of pink-footed geese under threat

As thousands of pink-footed geese (Anser brachyrhynchus) prepare for their spring migration north to breeding grounds in the Arctic, ecologists are warning that the escalating conflict between farmers and the geese is threatening the birds' survival. Writing in the new issue of the British Ecological Society's Journal of Applied Ecology, Professor Marcel Klaassen of the Netherlands Institute of E...

Mayo Clinic collaboration discovers protein amplifies DNA injury signals

A Mayo Clinic-led research collaboration has discovered that the protein MDC1 amplifies weak DNA injury signals so genetic repair can begin. Once amplified, even low-level damage signals become strong enough to activate the cell's natural repair processes while the injury is most tractable to repair. . http://www.molecule.org/). The research was conducted in collaboration with colleagues from Ha...

New gene reduces retinal degeneration in fruit flies

Johns Hopkins researchers have discovered a gene in fruit flies that helps certain specialized neurons respond more quickly to bright light. The study, published in the April 4 issue of Current Biology, also has implications for understanding sensory perception in mammals. . In teasing apart the molecular interactions and physiology underlying light perception, the researchers studied a gene they...

First demonstration of 'teaching' in non-human animals

Certain species of ant use a technique known as 'tandem running' to lead another ant from the nest to a food source. Signals between the two ants control both the speed and course of the run. It is believed to be the first time a demonstration of 'formal' teaching has been recognised in any non-human animal. . .. The research, by Professor Nigel Franks and Tom Richardson from Bristol University,...

New analysis shows three human migrations out of Africa

A new, more robust analysis of recently derived human gene trees by Alan R. Templeton, Ph.D, of Washington University in St Louis, shows three distinct major waves of human migration out of Africa instead of just two, and statistically refutes –strongly ?the 'Out of Africa' replacement theory. . .. "The 'Out of Africa' replacement theory ha...

Study reveals mass migration of mormon crickets driven by hunger, fear

An international team of researchers, including Kent State University professor Dr. Patrick D. Lorch, have revealed the motivating factors behind the seasonal mass migration of Mormon crickets in western North America. . .. Throughout their seasonal migration, millions of Mormon crickets (relatives of locusts and grasshoppers) cover more than 50 miles of ground, destroying farmland and causing...

Chimpanzees can transmit cultural behavior to multiple 'generations'

Transferring knowledge through a chain of generations is a behavior not exclusive to humans, according to new findings by researchers at the Yerkes National Primate Research Center of Emory University and the University of St. Andrews, Scotland. For the first time, researchers have shown chimpanzees exhibit generational learning behavior similar to that in humans. Unlike previous findings that in...

DNA: Bacteria's survival ration

The ubiquitous bacteria E. coli rank among nature's most successful species for lots of reasons, to which biologists at the University of Southern California have added another: in a pinch, E. coli can feast on the DNA of their dead competitors. . .. The team's latest study, presented in the June 1 issue of the Journal of Bacteriology, finds that DNA is a critic...

Cycles of cell death, proliferation key to liver cancer

Research at the University of California, San Diego (UCSD) School of Medicine shows that liver cancer is likely caused by cycles of liver cell death and renewal. . The research, appearing online the week of June 19 in advance of publication in the journal Proceedings of the National Academy of Sciences, underscores the importance of JNK1-mediated cell death and compensatory proliferation. The fi...

A dichotomy in migration patterns found for sea turtles in east Atlantic

Studying members of a large population of loggerhead sea turtles that nest on the Cape Verde islands off of West Africa, researchers have found an unexpected dichotomy in turtle behavior: While some turtles leave the nesting grounds to feed on bottom-dwelling sea life in shallow coastal waters, others leave Cape Verde to roam the much deeper open ocean along the African coast and exhibit a distin...

Protein-coated dental implants could improve bone regeneration

Titanium dental implants coated with proteins that induce bone formation may be a key advancement in treating tooth loss due to gum disease, researchers say. . .. .. Dr. Wikesjö, who came to MCG this year from Temple University in...

Salk and Stanford teams join forces to reveal two paths of neurodegeneration

Wiring the developing brain is like creating a topiary garden. Shrubs don't automatically assume the shape of ornamental elephants, and neither do immature nerve cells immediately recognize the "right" target cell. Abundant foliage, either vegetal or neuronal, must first sprout and then be sculpted into an ordered structure. . Neurons extend fibers called axons to target cells in an exuberant man...

Global warming may warrant new approaches to ecosystem restoration

Ecosystems behave in unpredictable ways and, because of this, restoration ecologists are often faced with unforeseen challenges. Researchers, in a recent article published in Restoration Ecology, argue that restoration methods of the past may not always be applicable in the future They see the largest potential challenge ahead is restoring environments undergoing the most rapid rate of change...

Research links protein to breast-cancer migration

Scientists have moved a step closer to understanding how breast cancer spreads to other parts of the body, thanks to research published this week. . .. .. "What we have identified is a new role for a protein called LPP," explained Professor Andrew Sharrocks, who headed...
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