Nitrogen fixation is the process by which atmospheric nitrogen is converted either by a natural or an industrial means to a form of nitrogen such as ammonia. In nature, most nitrogen is harvested from the atmosphere by microorganisms (see above) to form ammonia, nitrites, and nitrates that can be used by plants.
A Colonoscopy costs $770 in Columbus when you take the median price of the 40 medical providers who perform Colonoscopy procedures in the Columbus, OH area.
In one Midwestern city, Healthcare Blue Book found that prices paid by members in managed-care networks for a colonoscopy ranged from $840 at a freestanding office run by a gastroenterology group to $4,481 at the local academic medical center. (See chart below.)