ISO (International Organization for Standardization) envelope sizes are the official international metric envelope sizes; however, Japan uses JIS (Japan Industrial Standard) and metricated traditional envelope sizes. N.B.
Peptic ulcers are holes or breaks in the protective lining of the duodenum (the upper part of the small intestine) or the stomach -- areas that come into contact with stomach acids and enzymes. Duodenal ulcers are more common than stomach ulcers.Comparatively rare are esophageal ulcers, which form in the esophagus -- or swallowing tube -- and are often a result of exposure to medications, like certain antibiotics or anti-inflammatories, or alcohol abuse.veruse of over-the-counter painkillers (such as aspirin, ibuprofen, and naproxen), heavy alcohol use, psychological stress, and smoking exacerbate and may promote the development of ulcers, especially in someone with H. pylori. Other studies show that stomach ulcers are more likely to develop in older people.
1 Peptic ulcer formation is related to H. pylori bacteria in the stomach and nonsteroidal anti-inflammatory medications (NSAIDs) in 50% of patients. 2  For the remaining 50% there are miscellaneous or unknown causes.3  Ulcer pain may not correlate with the presence or severity of ulceration. peptic ulcer of the stomach is called a gastric ulcer; of the duodenum, a duodenal ulcer; and of the esophagus, an esophageal ulcer. Peptic ulcers occur when the lining of these organs is corroded by the acidic digestive (peptic) juices which are secreted by the cells of the stomach.