http://www.physorg.com/ en-us Physorg.com internet news portal provides the latest news on science including: Physics, Nanotechnology, Life Sciences, Space Science, Earth Science, Environment, Health and Medicine. (PhysOrg.com) -- Meiosis - the pairing and recombination of chromosomes, followed by segregation of half to each egg or sperm cell - is a major crossroads in all organisms reproducing sexually. Yet, how the cell precisely choreographs these chromosomal interactions is a long-standing question. http://www.physorg.com/news177322387.html Biology Fri, 13 Nov 2009 08:13:35 EST news177322387 The MESSENGER spacecraft's third flyby of the planet Mercury has given scientists, for the first time, an almost complete view of the planet's surface and revealed some dramatic changes in Mercury's comet-like tail. http://www.physorg.com/news176575356.html Space & Earth Wed, 04 Nov 2009 16:43:05 EST news176575356 For the first time, researchers have experimentally induced antibodies that neutralize HIV-1 and simultaneously recognize both HIV-1 envelope protein and lipids. The results were reported by U.S. Military HIV Research Program (MHRP) researchers on Aug. 25 in the online version of AIDS, the official journal of the International AIDS Society. http://www.physorg.com/news171037113.html Medicine & Health Tue, 01 Sep 2009 15:30:03 EST news171037113 (PhysOrg.com) -- Researchers from Australia have taken a step toward resolving a seemingly simple yet unsolved paradox known as the "two-envelope" problem. They`ve worked out a new strategy that can enable a player to beat the game in terms of increasing their payoff. The strategy could have applications in optimizing gains in investments and other areas. http://www.physorg.com/news169811689.html Other Sciences Tue, 18 Aug 2009 10:56:04 EST news169811689 (PhysOrg.com) -- For 25 years, researchers have tried and failed to develop an HIV vaccine, primarily by focusing on a small number of engineered "super antibodies" to fend off the virus before it takes hold. So far, these magic bullet antibodies have proved impossible to produce in people. Now, in research to be published March 15 online by Nature, scientists at The Rockefeller University have laid out a new approach. They have identified a diverse team of antibodies in "slow-progressing" HIV patients whose coordinated pack hunting knocks down the virus just as well as their super-antibody cousins fighting solo. http://www.physorg.com/news156346918.html Medicine & Health Sun, 15 Mar 2009 14:42:37 EST news156346918 (PhysOrg.com) -- After being recognized and initially processed by the cellular machinery, the broken chromosome is extensively scanned for homology and the break itself is later tethered to the nuclear envelope. Thus the researchers uncovered a surprising feature of how DNA strand breaks can be handled. Their unexpected findings have important implications for the understanding of DNA repair mechanisms. (Molecular Cell 33, February 13th, 2009) http://www.physorg.com/news153757255.html Chemistry Fri, 13 Feb 2009 14:21:42 EST news153757255 The CoRoT satellite has discovered a planet only twice as large as the Earth orbiting a star slightly smaller than the Sun. It is the smallest extrasolar planet (planet outside our solar system) whose radius has ever been measured. The planet's composition is not yet certain, but it is probably made predominantly of rock and water. It orbits its host star in 20 hours, which is the shortest orbital period of all exoplanets found so far. Astronomers infer its temperature must be so high (over 1000 degrees C) that it should be covered in lava or superheated water vapour. http://www.physorg.com/news152880771.html Space & Earth Tue, 03 Feb 2009 10:54:56 EST news152880771 A large fraction of the transcription factor Oct-1 is associated with the inner nuclear envelope, but how and why it is retained there was unknown. http://www.physorg.com/news150976704.html Biology Mon, 12 Jan 2009 09:58:24 EST news150976704 (PhysOrg.com) -- UK scientists have discovered a fingerprint'`developer' which can highlight invisible prints on almost any surface - and read the text of a letter just from the envelope it was sent in. http://www.physorg.com/news145517878.html Chemistry Mon, 10 Nov 2008 05:37:58 EST news145517878 University of Texas Medical Branch at Galveston 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. http://www.physorg.com/news139685410.html Medicine & Health Wed, 03 Sep 2008 18:30:10 EST news139685410