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 Advanced Attack Helicopter Plan of the US Army is the main reason why AH-64D Apache Long Bow was created by its brilliant manufacturer known as The Boeing. During the Gulf War, this attack helicopter model was considered to be the most powerful one used. 2. MI-28H Havoc