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  • 1
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Marine mammal science 9 (1993), S. 0 
    ISSN: 1748-7692
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Abstract: The bile acid composition of bile obtained from the hepatopancreatic ducts of three species of sperm whales (Cetacea: Physeteridae) was investigated. Bile acids were isolated by adsorption chromatography and analyzed by sequential HPLC, SIMS, and GLC-MS. In each species the dominant bile acids were deoxycholic acid (a secondary bile acid formed by bacterial 7α-dehydroxylation of cholic acid), and chenodeoxycholic acid (a primary bile acid) which together composed more than 86% of biliary bile acids in all three species. In Physeter catodon (sperm whale) deoxycholic acid constituted 79%, and in Kogia breviceps (pygmy sperm whale) it was 61% of biliary bile acids. The sperm whale, which differs from other whales in having a remnant of a large intestine, is the second mammal identified to date in which deoxycholic acid is the predominant bile acid. The high proportion of deoxycholic acid indicates that in the Physeteridae, anaerobic fermentation occurs in its cecum, and that bile acids undergo enterohepatic cycling. Also found were minor proportions of cholic acid, as well as bacterial derivatives of chenodeoxycholic acid (ursodeoxycholic acid, lithocholic acid, and the 12β-epimer of allo-deoxycholic acid). Bile acids were conjugated with taurine in all species; however, in the sperm whale (Physeter) glycine conjugates were present in trace proportions. The bile acid hydroxylation pattern (12α- but not 6α-hydroxylation), lack of primary 5α- (allo) bile acids, and presence of glycine conjugated bile acids suggests the possibility that sperm whales originated from ancient artiodactyls.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Environmental science & technology 15 (1981), S. 715-716 
    ISSN: 1520-5851
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1432-0800
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Medicine
    Type of Medium: Electronic Resource
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  • 4
    ISSN: 1573-2568
    Keywords: ileal pouch-anal anastomosis ; pouchitis ; ulcerative colitis ; familial adenomatous polyposis ; shortchain fatty acids ; bile acids
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Construction of an ileal reservoir changes the fecal bacterial flora and the fecal composition of bile acids and short-chain fatty acids. We examined the relationships between pouch inflammation (pouchitis) and pouch content, as assessed by analysis of fecal bacteria, bile acids, and short chain fatty acids. Four groups were studied: ileal pouch-anal anastomosis (IPAA) for ulcerative colitis with pouchitis (N=10), IPAA without pouchitis (N=5), IPAA for familial adenomatous polyposis without pouchitis (N=5); and Brooke ileostomy for ulcerative colitis, which served as controls (N=5). Pouchitis was defined as ≥7 points on an 18-point pouchitis disease activity index. Aerobic and anaerobic bacteria were quantitatively cultured. Total aqueous-phase bile acids were measured by thin-layer chromatography and an enzymatic 3α-OH hydroxysteroid dehydrogenase method. Fecal short chain fatty acids were measured by gas liquid chromatography. All patients with an IPAA had higher ratios of anaerobes/aerobes and concentrations of anaerobic gram-negative rods than did patients with an ileostomy. There were no other differences between patient groups with respect to bacteria, aqueous-phase total bile acids, or fecal short-chain fatty acids. Fecal concentrations of bacteria, bile acids, and short-chain fatty acids were similar in patients with and without pouchitis, indicating that these factors can not be the sole cause of pouchitis.
    Type of Medium: Electronic Resource
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