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.
A rare cause of peptic ulcers is Zollinger-Ellison syndrome. In this condition, the stomach makes too much acid, damaging the stomach lining. Although there is no evidence to prove that emotional or mental stress causes ulcers, it does seem to make ulcers worse in some people. But the connection is still controversial.