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
Regulation of pesticides in the European Union Regulation of pesticides in the European Union A pesticide, also called Plant Protection Product (PPP), which is a term used in regulatory documents, consists of several different components. The active ingredient in a pesticide is called “active substance” and these active substances either consist of chemicals or micro-organisms. The aims of these active substances are to specifically take action against organisms that are harmful to plants (Art. 2(2), Regulation (EC) No 1107/2009<ref name="regulation:1107/2009"></ref>). In other words, active substances are the active components against pests and plant diseases. In the Regulation (EC) No 1107/2009<ref name="regulation:1107/2009"></ref>, a pesticide is defined based on