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.
Frederick Griffith's Discovery of the Transforming Principle in Bacterial Organisms. Frederick Griffith was searching for a vaccine against Spanish flu and was using two strains of Streptococcus pneumoniae bacteria. During the process he discovered that gene transfer took place between two different bacterial strains. slide 1 of 4. Bacteria Microbiology Frederick Griffith's experiment showed that bacteria were capable of transferring their genetic information by a process that he called transformation. Frederick Griffith was an English army doctor and his experiment, which consisted of testing the effects of killed bacteria on live cells, was actually intended to help develop a vaccine against a future outbreak of Spanish flu, the pandemic that killed millions of people after world War I.