Transmitted-light microscope image of airborne particles collected after a four-day exposure in a passive sampler at Marylebone Road in central London. Disclaimer: AAAS and EurekAlert! are not ...
Light microscope images of E. coli cells in transmitted light (left) and reflected light that picks up the red fluorescence of a dye staining the cells' DNA (right). In normal cells (upper panel), the ...
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