Google celebrated the 166th birth anniversary of microbiologist Hans Christian Joachim Gram with a doodle.
About:
Hans Christian Joachim Gram was born in 1853, in Denmark’s Copenhagen.
The Danish microbiologist is best known for pioneering the method of the Gram stain to identify bacteria, which is still widely used.
Gram staining method:
Staining is an auxiliary technique used in microscopic techniques to enhance the clarity of the microscopic image. The most widely used staining procedure is the Gram stain.
Gram staining is a differential staining technique that differentiates bacteria into two groups: gram-positives and gram-negatives. The procedure is based on the ability of microorganisms to retain colour of the stains.
Gram-negative bacteria are decolorized by the alcohol, losing the colour of the primary stain, purple. Gram-positive bacteria are not decolorized by alcohol and will remain as purple.
Importance: The Gram stain is a very important preliminary step in the initial characterization and classification of bacteria. It also enables the bacteria to be examined using a light microscope.
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