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Biology RSS FeedsSharp images from the living mouse brain - This STED image of a nerve cell in the upper brain layer of a living mouse shows in previously impossible detail the very fine dendritic protrusions of a nerve cell To explore the most intricate structures of the brain in order to decipher how it functions ? Stefan Hell's team of researchers at the Max Planck Institute for Biophysical Chemistry in Göttingen has made a significant step closer to this goal. Using the STED microscopy developed by Hell, the scientists have, for the first time, managed to record detailed live images inside the brain of a living mouse. Captured in the previously impossible resolution of less than 70 nanometers, these images have made the minute structures visible which allow nerve cells to communicate with each other. This application of STED microscopy opens up numerous new possibilities for neuroscientists to decode fundame...Feed Source: feeds.biologynews.net Exercise triggers stem cells in muscle - Mesenchymal stem cells (green) accumulate in skeletal muscle following exercise and release growth factors to spur regeneration. University of Illinois researchers determined that an adult stem cell present in muscle is responsive to exercise, a discovery that may provide a link between exercise and muscle health. The findings could lead to new therapeutic techniques using these cells to rehabilitate injured muscle and prevent or restore muscle loss with age.
... Satellite tracking reveals sea turtle feeding hotspots - Satellite tracking of threatened loggerhead sea turtles has revealed two previously unknown feeding 'hotspots' in the Gulf of Mexico that are providing important habitat for at least three separate populations of the turtles, according to a study published recently in the journal Biological Conservation.
... Parasites or not? Transposable elements in fruit flies - Nearly all organisms contain pieces of DNA that do not really belong to them. These "transposable elements", so called because they are capable of moving around within and between genomes, generally represent a drain on the host's resources and in certain cases may lead directly to disease, e.g. when they insert themselves within an essential host gene. The factors that govern the spread of transposable elements within a population are broadly understood but many of the finer points remain unclear. New work at the University of Veterinary Medicine, Vienna (Vetmeduni Vienna) may pave the way to a more profound knowledge of the intracellular battle that is constantly being played out between the host and invading DNA.
... A battle of the vampires, 20 million years ago? - They are tiny, ugly, disease-carrying little blood-suckers that most people have never seen or heard of, but a new discovery in a one-of-a-kind fossil shows that "bat flies" have been doing their noxious business with bats for at least 20 million years.
... New procedure repairs severed nerves in minutes, restoring limb use in days or weeks - American scientists believe a new procedure to repair severed nerves could result in patients recovering in days or weeks, rather than months or years. The team used a cellular mechanism similar to that used by many invertebrates to repair damage to nerve axons. Their results are published today in the Journal of Neuroscience Research.
... Study finds southern Indian Ocean humpbacks singing different tunes - A recently published study by the Wildlife Conservation Society and others reveals that humpback whales on both sides of the southern Indian Ocean are singing different tunes, unusual since humpbacks A recently published study by the Wildlife Conservation Society and others reveals that humpback whales on both sides of the southern Indian Ocean are singing different tunes, unusual since humpbacks in the same ocean basin usually all sing very similar songs.
... Yellow-cedar are dying in Alaska: Scientists now know why - Yellow-cedar in West Chichagof-Yakobi Wilderness Area, a pristine area of coastal Alaska, faces intensive mortality. February 1, 2012. Yellow-cedar, a culturally and economically valuable tree in southeastern Alaska and adjacent parts of British Columbia, has been dying off across large expanses of these areas for the past 100 years. But no one could say why?until now.
... Surprise finding redraws 'map' of blood cell production - Drs Maria Kauppi (left) and Ashley Ng from the Walter and Eliza Hall Institute in Melbourne, Australia, study blood 'progenitor' cells A study of the cells that respond to crises in the blood system has yielded a few surprises, redrawing the 'map' of how blood cells are made in the body.
... Researchers visualize the development of Parkinson's cells - In the US alone, at least 500,000 people suffer from Parkinson's disease, a neurological disorder that affects a person's ability to control his or her movement. New technology from the University of Bonn in Germany lets researchers observe the development of the brain cells responsible for the disease.
... Moonlighting enzyme works double shift 24/7 - MSU researchers found a moonlighting enzyme in Arabidopsis that works double shifts 24/7. A team of researchers led by Michigan State University has discovered an overachieving plant enzyme that works both the day and night shifts.
... Biological time-keeper linked to diabetes - Researchers in Lille and Paris demonstrated that mutations in the melatonin receptor gene (melatonin or the "hormone of darkness" induces sleep) lead to an almost sevenfold increase in the risk of developing diabetes. This research, which was published in Nature Genetics on 29 January 2012, could contributed to the development of new drugs for the treatment or prevention of this metabolic disease.
... Defects in the packaging of DNA in malignant brain tumors - Glioblastomas grow extremely aggressively into healthy brain tissue and, moreover, are highly resistant to radiation therapy and chemotherapy. Therefore, they are regarded as the most malignant type of brain tumor. Currently available treatment methods are frequently not very effective against this type of cancer. Glioblastoma can affect people of all ages, but is less common in children than in adults.
... Detecting detrimental change in coral reefs - Over dinner on R.V. Calypso while anchored on the lee side of Glover's Reef in Belize, Jacques Cousteau told Phil Dustan that he suspected humans were having a negative impact on coral reefs. Dustan?a young ocean ecologist who had worked in the lush coral reefs of the Caribbean and Sinai Peninsula?found this difficult to believe. It was December 1974.
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