Cell culture molecular biology primarily involves cultures of cells on flat plastic dishes. This technique is known as two-dimensional (2D) cell culture, and was first developed by Wilhelm Roux who, in 1885, removed a portion of the medullary plate of an embryonic chicken and maintained it in warm saline for several days on a flat glass plate. From the advance of polymer technology arose today's standard plastic dish for 2D cell culture, commonly known as the Petri dish. Julius Richard Petri, a German bacteriologist, is generally credited with this invention while working as an assistant to Robert Koch. Various researchers today also
What Is the Matter with Willi? What Is the Matter with Willi? What Is the Matter with Willi? (German:Was ist denn bloß mit Willi los) is a 1970 German comedy film directed by Werner Jacobs and starring Heinz Erhardt, Ralf Wolter and Ruth Stephan. A tax inspector tries to reform the Ministry of Finance. It was based on a character Heinz Erhardt played on television. It was followed by a loose sequel "That Can't Shake Our Willi!" and in 1971 a third film "Our Willi Is the Best" was made with Erhard returning as Willi. The final film "Willi Manages The Whole Thing" was released in