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 Pentagon bypassed US helicopter makers, choosing to spend more than $1 billion on dozens of Russian Mi-17 helicopters. A study shows the Chinook built by Boeing is a better fit.ake our quiz. Photos of the Day Photos of the weekend. An American-made helicopter, the U.S. Army's workhorse Chinook built by Boeing in Pennsylvania, was found to be the most cost-effective single platform type fleet for the Afghan Air Force over a twenty year period, according to the excerpts.