Wegwerfkulturschale mit Verstärkungsrippen.

摘要

A Petri dish (1) in which the flat bottom (2) is provided with a plurality of preferably radial ribs (6) is disclosed. The ribs do not project more than about 0.05 inches above the upper surface of the bottom (2), and preferably not more than about 0.03 inches. The thickness of the bottom portion (2) other than at the ribs is not greater than about 0.03 inches, and preferably not greater than about 0.025 inches. Various rib arrangements are contemplated. In the preferred embodiment, there are at least three radial ribs (6), and preferably four ribs (6) spaced at 90 degrees to each other. A lid (10) having the same basic structure may also be produced. Generally any suitable rib layout could be selected. A large number or ribs could be provided, if desired, though not a requirement. The ribs (6) need not necessarily be radial. The ribs (6) need not necessarily be continuous, and they need not necessarily run all the way from the center to the side wall (4), or from side wall (4) to side wall (4). The ribs (6) need not necessarily be straight, but could be curved. The ribs (6) could project downwardly instead of or in addition to upwardly.