The Hartmann procedure involves resection of the rectosigmoid colon with creation of a colostomy. It was first described by Henri Albert Hartmann at the 30th Congress of the French Surgical Association in 1921.
Propionic acid (from the Greek words protos, meaning first, and pion, meaning fat; also known as propanoic acid) is a naturally occurring carboxylic acid with chemical formula C H 3 CH 2 C O OH.acteria of the genus Propionibacterium produce propionic acid as the end-product of their anaerobic metabolism. This class of bacteria is commonly found in the stomachs of ruminants and the sweat glands of humans, and their activity is partially responsible for the odor of both Swiss cheese and sweat.
Sulfuric acid in its pure form is a colorless viscous liquid commonly called oil of vitriol. The chemical formula for sulfuric acid is H 2 SO 4 and it is commercially available as a 96-98% solution or 18M H 2 SO 4. Concentrated sulfuric acid is covalent in nature as the acid is unionized. The atoms in the molecule are covalently bonded to one another. In this form sulfuric acid can be transported in stainless steel tankers. If concentrated sulfuric acid is added to water the reaction is extremely exothermic due to formation of hydrogen ions.