Intestinal metaplasia is also a common in Barrett esophagus. It this condition it is the esophageal squamous epithelial cells that undergo metaplasia. Approximately, 60% of esophageal cancers diagnosed in the U.S. stem from focal intestinal metaplasia.
Ozone Emission Sources. Emissions contributing to ozone formation come from many areas. The main emission sources categories are: On-road - cars, trucks, and buses. Off-road - aircraft, locomotive,etc. Non-road - construction, agricultural equipment, etc. Point - cement and power plants.
Ozone is a gas that occurs both at the earth's ground level and in the earth's upper atmosphere. Its chemical formula is O3. The ozone in the atmosphere occurs naturally and protects life on earth from the sun's harmful ultraviolet rays.The ozone that occurs on the ground level is formed when sunlight reacts with pollution from motor vehicles, power plants, industrial boilers, refineries, chemical plants, and other industrial sources.he ozone in the atmosphere occurs naturally and protects life on earth from the sun's harmful ultraviolet rays. The ozone that occurs on the ground level is formed when sunlight reacts with pollution from motor vehicles, power plants, industrial boilers, refineries, chemical plants, and other industrial sources.