The Origins of Agar
4 days ago
- #history-of-science
- #microbiology
- #agar
- Agar was first introduced into laboratories in 1881 and remains indispensable as a culture medium.
- During WWII, agar was considered a 'critical war material' due to its use in vaccine and penicillin production.
- Agar's discovery dates back to a 17th-century Japanese kitchen accident involving seaweed jelly.
- Industrial production of agar began in Japan in the mid-19th century using natural freeze-drying techniques.
- Agar is prized in culinary applications for its ability to form firm, heat-stable gels at low concentrations.
- Fanny Angelina Hesse played a crucial role in introducing agar as a growth medium in microbiology.
- Agar's superior properties include resistance to microbial enzymes, ease of sterilization, and transparency.
- Gelidium seaweed, the primary source of lab-grade agar, must be wild-harvested, making it a strategic resource.
- Recent agar shortages and price increases have raised concerns about supply chain vulnerabilities.
- Despite efforts to find alternatives, agar remains the preferred medium due to its versatility and established protocols.