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.
Helicopter is the most effective source used for logistics,Wars and rescue purposes these days. From their first appearance in World War II, through the Vietnam War and to the modern day, helicopters have helped to transform the battlefield. These are the 10 Best Attack Helicopters in the World today. Each are rated on their avionics, agility, speed & firepower capabilities. You may also like the lists of fastest helicopters and advance fighter jet.