New Delhi: The doodle on the Google home page on Friday celebrates the 161st birth anniversary of the German bacteriologist Julius Richard Petri. Petri is most famous for inventing the Petri dish, ubiquitous in microbiology labs.
Contamination by airborne bacterial pores was a worry for bacteriologists and Julius Richard Petri who was then assisting the pioneering bacteriologist Robert Koch devised a solution.
Petri's 1877 eponymous invention is a shallow dish consisting of two cylindrical, overlapping halves. The top of the dish is larger than the bottom so that when the dish is closed a strong seal is formed which prevents the contamination of the culture.
Beisdes their effectiveness, the reason for popularity of Petri dishes are that they are very easy to use and can be easily stacked to save space in the lab.
Nowadays single-use disposable Petri dishes are preferred over glass. Petri dishes are also known as Petri plate or cell culture dish.
Julius Richard Petri was born on May 31, 1853 in Barmen and died aged 69 on December 20, 1921 in Zeitz.
Google's interactive Petri dish doodle is formed by six Petri dishes in Google colours and recreates the microbe culture process and the resultant microbial growth spells out the Google letters.
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