The isolation of a pure yeast cell in 1883 transformed industrial brewing by establishing consistent fermentation standards. Emil Christian Hansen, a Danish mycologist and physiologist, developed techniques at the Carlsberg Laboratory that enabled the cultivation of Saccharomyces carlsbergensis. This achievement provided the biological foundation for all modern lager beer production, moving fermentation from empirical observation to precise laboratory science.
Early Academic Development
Born in Ribe in 1842, Hansen pursued his education at the University of Copenhagen. During his tenure as a student, he served as an unpaid assistant to the zoologist Japetus Steenstrup. His early research focused on mycology, culminating in the 1876 essay De danske Gjødningssvampe, which earned him a gold medal. Between 1874 and 1875, he curated a collection of 350 specimen units titled Fungorum fimicolorum exempl. exsiccati. In 1876, he collaborated with Alfred Jørgensen on a Danish translation of Charles Darwin’s The Voyage of the Beagle.
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Hansen joined the Carlsberg Laboratory in 1879, serving as the director of the physiological department until 1909. His most significant contribution occurred in 1883, when he successfully isolated a single yeast cell and propagated it in a sugary solution. The resulting yeast strain, classified as Saccharomyces carlsbergensis, remains the origin of yeast varieties used globally for lager production. Beyond his industrial applications, he was the taxonomic authority for the fungal genus Anixiopsis, established in 1897.
Scholarly Legacy and Honors
Throughout his career, Hansen contributed to the literature of microbiology and mycology with titles including Practical studies in fermentation: being contributions to the life history of micro-organisms, published in 1896, and Considerations on Technical Mycology, released in 1905. His scientific contributions earned him recognition as a member of the Royal Danish Academy of Sciences and Letters and the German Academy of Sciences Leopoldina. In 1889, he was named a Knight of the Order of the Dannebrog, followed by an appointment as commander of the Order of the Dannebrog in 1908. He died in 1909 in Hornbæk and is buried at Vestre Cemetery.
Fast facts
- Born: 1842, Ribe
- Died: 1909, Hornbæk
- Education: University of Copenhagen
- Primary Employer: Carlsberg Laboratory
- Key Discovery: Pure yeast cell isolation, 1883
- Taxonomic Authority: Anixiopsis
- Awards: Knight of the Order of the Dannebrog (1889), Commander (1908)
- Notable Genus named in his honor: Hanseniaspora
Questions readers ask
What is Hansen's most significant scientific contribution?
He was the first to isolate a pure yeast cell in 1883, allowing for controlled and consistent fermentation processes in lager production.
Did he publish his research in English?
Yes, his notable works include Practical studies in fermentation (1896) and Considerations on Technical Mycology (1905).
Achievements
- Held posts at Carlsberg Laboratory
- Educated at University of Copenhagen
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