Scientists will have a new view of how the AIDS virus (HIV) enters a target cell and begins its process of infection, thanks to a technique created by researchers at the Salk Institute.
The technique allows scientists to observe for the first time the steps taken by viruses like HIV after they enter a cell. The study was done with a chicken virus that was modified to contain the genes of HIV. Both the chicken virus and HIV are retroviruses, which means their genomes are made from RNA rather than DNA. When the viruses enter a host cell, their RNA genomes are converted to DNA, which integrates into the DNA of the host cell. This step is essential for the formation of new virus particles.
John Young, a Salk professor of infectious disease, and colleague Shakti Narayan reported their findings in the May 18 edition of the Proceedings of the National Academy of Sciences.
Andrew Porterfield | EurekAlert!
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Whether you call it effervescent, fizzy, or sparkling, carbonated water is making a comeback as a beverage. Aside from quenching thirst, researchers at the University of Illinois at Urbana-Champaign have discovered a new use for these "bubbly" concoctions that will have major impact on the manufacturer of the world's thinnest, flattest, and one most useful materials -- graphene.
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A study led by scientists of the Max Planck Institute for the Structure and Dynamics of Matter (MPSD) at the Center for Free-Electron Laser Science in Hamburg presents evidence of the coexistence of superconductivity and “charge-density-waves” in compounds of the poorly-studied family of bismuthates. This observation opens up new perspectives for a deeper understanding of the phenomenon of high-temperature superconductivity, a topic which is at the core of condensed matter research since more than 30 years. The paper by Nicoletti et al has been published in the PNAS.
Since the beginning of the 20th century, superconductivity had been observed in some metals at temperatures only a few degrees above the absolute zero (minus...
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