The size of a typical bacterium such as E. coli serves as a convenient standard ruler for characterizing length scales in molecular and cell biology. A “rule of thumb” based upon generations of light and electron microscopy measurements for the dimensions of an E. coli cell is to assign it a diameter of about ≈1µm, a length of ≈2µm, and a volume of ≈1µm3(1 fL)
En van de site van Sawyer:
The Sawyer MINI is certified for 0.1 micron filtration, meaning there is no pore size larger than 0.1 micron in size. This makes it impossible for harmful bacteria (like salmonella or leptospirosis), protozoa, or cysts like E. coli, Giardia, Vibrio cholerae, and Salmonella typhi to pass through the filter.
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