* To prevent spoilage: Pasteur was a scientist studying fermentation. He discovered that microorganisms (germs) were the cause of spoilage in wine and beer.
* To kill microorganisms: He found that heating liquids to a specific temperature for a specific time could kill these microorganisms without significantly altering the liquid's taste or quality.
* To extend shelf life: This process, called pasteurization, allowed for food and beverages to be stored for longer periods without spoiling.
In summary: Pasteur's research into fermentation led him to discover the role of microorganisms in spoilage. He then developed pasteurization as a method to kill these microorganisms and extend the shelf life of food and beverages.