Reference

Characterization of the Streptococcus adjacens group antigen structure

Characterization of the Streptococcus adjacens group antigen structure. Sieling, Peter A.; Thomas, Michael J.; Van de Rijn, Ivo (Med. Cent., Wake Forest Univ., Winston-Salem, NC 27157-1064, USA). J. Bacteriol., 174(2), 349-54 (English) 1992. CODEN: JOBAAY. ISSN: 0021-9193. DOCUMENT TYPE: Journal CA Section: 15 (Immunochemistry) The Streptococcus adjacens group antigen structure was characterized. Previous studies demonstrated that the amphiphile contained phosphorus, ribitol, galactose, galactosamine, alanine, and fatty acids. Phosphodiester bonds present in the purified group antigen were identified as part of a poly(ribitol phosphate), since ribitol phosphate was the only org. phosphate detected after acid hydrolysis. Hydrofluoric acid cleavage of the phosphodiester bonds generated oligosaccharide repeating units. Gas chromatog.-mass spectrometric anal. 28039-99-8 and 7535-00-4 which are cas registry numbers of chemicals are mentioned. of the methylated, acetylated oligosaccharide suggested that the repeating unit is a trisaccharide of Galpb1-3Galpb1-4GalNac with N-acetylgalactosamine attached in b-linkage to either the no. 2 or the no. 4 carbon of ribitol. The lipid- and carbohydrate-substituted poly(ribitol phosphate) of the S. adjacens group antigen therefore is a unique amphiphile structure, differing in its repeating-unit structure from the polyglycerophosphate structure of the more common gram-pos. amphiphile lipoteichoic acid. .

A case study for thermal treatment of fluorinated hydrocarbon with 15% wt hydrofluoric acid recovery

A case study for thermal treatment of fluorinated hydrocarbon with 15% wt hydrofluoric acid recovery. Mistry, N.; Vanhorenbeek, Willy (T-Thermal Div., Selas-Linde GmbH, Germany, Aldershot, Hampshire GU12 4DR, UK). Proceeding of the International Conference on Incineration and Thermal Treatment Technologies, Philadelphia, PA, United States, May 14-18, 2001, 317-323. University of Maryland: College Park, Md. (English) 2001. CODEN: 69BYDF. DOCUMENT TYPE: Conference; (computer optical disk) CA Section: 49 (Industrial Inorganic Chemicals) Section cross-reference(s): 59 The thermal treatment technol. used to safely destroy Fluorinated Hydrocarbon components generated as a result of fluorination of org. compds. is described. Thermal treatment of these components results in high concn. of hydrogen fluoride in the combustion chamber requiring special attention to handling and selection of materials of construction. The plant is provided with a dedicated downstream Air Pollution Control system designed not only to scrub the flue gases to comply with European emission legislation, but also to recover Hydrofluoric acid at a concn. of 15% wt as byproduct. The case study also covers topics such as measures for increased plant availability, problems assocd. with treating fluorinated wastes and the resulting solns. to overcome the encountered difficulties.