Copy of a grape vine with two bunches of grapes to illustrate a fermentation experiment performed by Louis Pasteur in 1862

Made:
1901-2000 in Europe
maker:
Unknown

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Copy of a grape vine with two bunches of grapes, one wrapped in cotton wool, the other exposed, to illustrate an experiment performed by Pasteur on the fermentation of grape juice

This model illustrates an experiment performed in 1862 by Louis Pasteur (1822-1895) to study the fermentation of grape juice. One bunch of grapes is wrapped in sterilised cotton wool while the other is exposed to the air. When both bunches were ripe, they were crushed separately in vessels – those from the covered bunch did not ferment but the uncovered ones did. This experiment showed that alcoholic fermentation only happens when the grape juice comes into contact with germs of yeast in the air. This experiment was one of a series by Pasteur that disproved existing ideas about spontaneous generation.

Details

Category:
Microbiology
Object Number:
A63414
Materials:
cloth, cotton and plastic
type:
model
taxonomy:
  • visual and verbal communication
  • model - representation
credit:
Institut Pasteur