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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.