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1 Jan 1884 Jahr - 1884: Hans Christian Gram develops a way of classifying bacteria into two major categories, Gram-positive and Gram-negative. This technique, the Gram stain, continues to be a standard procedure in medical microbiology today.

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Science

ByFede 2005
24 Jan 2020

Datum:

1 Jan 1884 Jahr
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~ 140 years ago
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