In cell culture biology, confluence is the term commonly used as an estimate of the number of adherent cells in a culture dish or a flask, referring to the proportion of the surface which is covered by cells.or example, 50 percent confluence means roughly half of the surface is covered and there is still room for cells to grow. 100 percent confluence means the surface is completely covered by the cells, and no more room is left for the cells to grow as a monolayer.
One of the few external rigid points on the GZ-20âs envelope, it holds the battens, attachments for the nose lines and the mooring spindle. 2. Material. The largest component of the Blimp, the GZ-20âs envelope is made of two-ply, neoprene-impregnated polyester fabric. 3. Ballonet. Located in the forward and aft of the envelope, these air bags allow the pilot to regulate the amount of helium in the Blimp and statically trim the ship in a nose-up or nose-down situation.
Origin not entirely certain, however most historians believe that it is onomatopoeia for the sound a blimp makes when thumped. Although there is some disagreement among historians, credit for coining the term is usually given to Lt. A.D. Conningham of the British Royal Navy in 1915.