hans c. j. gram

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Definition

Proper noun A Danish physician and bacteriologist, best known for developing the Gram stain, a fundamental laboratory technique in microbiology used to classify bacteria into two major groups (Gram-positive and Gram-negative) based on their cell wall properties.

Usage

This term is used almost exclusively to refer to the historical figure and the staining method named after him. * The Gram stain procedure was developed by Hans C. J. Gram. * In microbiology, we studied the contributions of Hans C. J. Gram.

Advanced Usage
  • Eponymous Use: The surname "Gram" is used adjectivally in the terms "Gram stain," "Gram-positive," and "Gram-negative," which are far more common in modern scientific language than the full name.
    • Correct: "The bacteria were identified as Gram-positive cocci."
    • Less common: "This classification is based on the work of Hans C. J. Gram."
Variants and Related Words
  • Gram stain (n.): The differential staining technique invented by Hans C. J. Gram.
  • Gram-positive (adj.): Describing bacteria that retain the crystal violet stain and appear purple under the microscope.
  • Gram-negative (adj.): Describing bacteria that do not retain the crystal violet stain and appear red or pink after a counterstain is applied.
Synonyms
  • There are no direct synonyms for the proper name of a person. Related terms include bacteriologist and microbiologist, which describe his profession.
Related Phrases
  • Gram's method: Another term for the Gram stain procedure.
  • Gram staining: The act of performing the Gram stain technique.
Noun
  1. Danish physician and bacteriologist who developed a method of staining bacteria to distinguish among them (1853-1938)

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