Gastric acid that it does not become too acidic. These cells also produce mucus, which forms a viscous physical barrier to prevent gastric acid from damaging the stomach. The pancreas further produces large amounts of bicarbonate and secretes bicarbonate through the pancreatic duct to the duodenum to completely neutralize any gastric acid that passes further down into the digestive tract. The main constituent of gastric acid is hydrochloric acid which is produced by parietal cells (also called oxyntic cells) in the gastric glands in the stomach. Its secretion is a complex and relatively energetically expensive process. Parietal cells contain an extensive secretory
2-Furoic acid 88% from 2-furanaldehyde. Oxidation with "N. corallina" is unique because most other microorganisms produce two products from the oxidation, the acid and the alcohol. Furthermore, aromatic ring destruction does not occur. In industrial use, 2-furoic acid is a preservative, acting as a bactericide and fungicide. It is also considered an acceptable flavoring ingredient and achieved a generally recognized as safe (GRAS) status in 1995 by the Flavor and Extract Manufacturers Association (FEMA). 2-Furoic acid is characterized as a white to off-white crystalline solid and has a distinct odor described in the Encyclopedia of Food and Color Additives as sweet, oily,