Probiotics such as bifidobacteria are typically used in cases when a disease occurs or might occur due to a kill-off of normal bacteria. For example, treatment with antibiotics can destroy disease-causing bacteria, but also normal bacteria in the GI (gastrointestinal) and urinary tracts.
The 3-place Hiller Model 360, military H-23 Raven, was based on the U.S. Navy UH-12, which was first flown in 1948. The H-23 Raven performed as a utility, observation, and MedEvac helicopter during the Korean war.
ICH-47F Chinook is a next-generation, multi-role heavy-lift helicopter jointly developed by AgustaWestland and Boeing to replace the 40 CH-47C Chinooks in service with the Italian Army. It is a license-built version of the CH-47F helicopter manufactured by Boeing.