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.
The Boeing CH-47 Chinook is an American twin-engine, tandem rotor heavy-lift helicopter.Its primary roles are troop movement, artillery placement and battlefield resupply.he Royal Air Force variant of the CH-47C is known as the Chinook HC1. The export version of the CH-47C Chinook for the Italian Army was designated CH-47C Plus. The Royal Air Force versions of the CH-47D are known as the Chinook HC2 and HC2A.