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
Missorium of Theodosius I large dish or shallow bowl that could be used in ceremonial washing of hands and face in both secular and pagan and Christian religious contexts, though this dish is too flat to be very useful for this, and was probably intended mainly to be displayed as a sign of wealth and imperial favour. The term now tends to be avoided by scholars, as rather imprecise, but has become traditional in the case of the dish in Madrid. This is made of solid silver and has traces of gilding on the inscriptions. Its size is exceptional compared to other contemporary silver