Overaeration lungs: Hyperaeration means lungs contain larger amount of air than normally expected. Has many causes. In children can be seen with diseases causing air trapping such as bronchiolitis, asthma, cystic fibrosis, congenital heart disease, early aspiration, and metabolic acidosis.
Barbara McClintock's World Discovering Jumping Genes For the first half of the 20th century, genes were seen as objects with fixed positions on the chromosomes. However, in the 1950s, Barbara McClintock showed that certain DNA fragments, termed transposons, can be activated to jump from one position on a chromosome to another.
Theodor Schwann Theodor Schwann (7 December 1810 â 11 January 1882) was a German scientist who isolated and named the enzyme pepsin. He also played a key role in promoting the idea of the cell as the foundation of living organisms. His work on the cell has recently been re-assessed, because the idea had been discussed before him. Cell history