Poyekhali! Yuri Gagarin & The Dawn of Space Exploration
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DNA 50th Anniversary

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purchased jigsaw puzzle for a relative they were very impressed and when they have finished the puzzle they are going to mount it in a frame
mrs l.
12th April 2010

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Influenza virus, computer artwork

Influenza virus. Computer artwork of an influenza(flu) virus. The virus consists of a core of RNA(ribonucleic acid) genetic material surrounded bya protein coat. Embedded in the coat are surfaceproteins. There are two types of surface protein, haemagglutinin and neuraminidase, and each existin several subtypes. Both surface proteins areassociated with the pathogenicity of the virus.Haemagglutinin binds to host cells, allowing thevirus to enter them and replicate. Neuraminidaseallows the new particles to exit the host afterreplication.. Stunning Photo Gifts From Science Photo Library