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
Culture of Croatia modelled like Venice. In the 7th century the Croats, along with other Slavs and Avars, came from Northern Europe to the region where they live today. The Croatians were open to Roman art and culture, and most of all to Christianity. The altar enclosure and windows of early medieval churches were highly decorated with a transparent shallow string-like ornament that is called Croatian interlace because the strings were threaded and rethreaded through themselves. Sometimes the engravings in early Croatian script-–Glagolitic appear. Soon, the Glagolitic writings were replaced with Latin ones on altar boundaries and architraves of old-Croatian churches. In Croatian