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

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Excellent fast service and the print I am sure will make my dad very happy on his birthday!
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21st February 2010

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Used dental floss, SEM

Used dental floss. Coloured scanning electron micrograph (SEM) of dental plaque on strands of used dental floss. Plaque consists of a film of bacteria embedded in a glycoprotein matrix. The matrix is formed from bacterial secretions and saliva. Plaque is the main cause of tooth decay. The bacteria feed on sugars in food, producing acid as a waste product. This acid corrodes the teeth's enamel coating, resulting in dental caries. A build-up of dental plaque can also lead to inflamed and infected gums. Severe gum disease can lead to teeth falling out. Magnification: x525 when printed at 10 centimetres wide.. Stunning Photo Gifts From Science Photo Library