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  • 1
    Electronic Resource
    Electronic Resource
    Δ3-Cholenic Acid (1955)
    s.l. : American Chemical Society
    Journal of the American Chemical Society 77 (1955), S. 3308-3309 
    Details
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ja01617a046
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  • 2
    Electronic Resource
    Electronic Resource
    Absence of Bile Acids in the Digestive Juice of the Swamp Crayfish ( Procanbarus clarkii ) (1965)
    [s.l.] : Nature Publishing Group
    Nature 205 (1965), S. 1326-1327 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Vonk?s suggestion, if confirmed, would be of great interest for comparative biochemistry, and we have therefore examined it experimentally. The materials investigated were the digestive juice (material I) and the whole intestinal tract (material II) obtained from the swamp crayfish, Procaribarus ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/2051326a0
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  • 3
    Electronic Resource
    Electronic Resource
    Proposed Abdominal Sonographic Staging to Predict Severity of Liver Diseases (2000)
    Springer
    Digestive diseases and sciences 45 (2000), S. 554-564 
    Details
    ISSN: 1573-2568
    Keywords: abdominal sonography ; peritoneoscopy ; histology ; liver diseases ; histogram-based standard deviation value
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Abdominal sonography is a routinely used noninvasive modality for screening and treatment of liver diseases. We attempted to establish a morphological sonographic staging to predict the severity of liver diseases with their consequent analysis with morphological staging of peritoneoscopy and histology. In all, 136 patients were enrolled for the final confirmation of disease state by peritoneoscopy and histology preceded by abdominal sonography. All patients were categorized from stage 0 to stage 5, depending on a proposed criterion of sonographic features based on surface pattern of liver and the appearance of internal echogenic bands relating to the irregularity of the liver texture. A digitized computer quantitation of histogram-based standard deviation (sd) values from different stages of sonographic images was analyzed, and their values were justified by correlation with the definite appearance of an internal echogenic band. The association of different sonographic stages with disease progression was also demonstrated by their relation with peritoneoscopy and histology. In all patients, the different sonographic staging results were significantly correlated with hepatic surface features of peritoneoscopic staging (r = 0.939, P 〈 0.0001) graded from stage 0 to stage 5 and were also correlated with biopsy-proven staging of fibrosis (r = 0.739, P 〈 0.0001). The greater sd values of histogram-based echo levels, as analyzed from digitized sonographic images of 90 patients, were associated with the appearance of internal echogenic bands (P 〈 0.0001). Furthermore, the corresponding sds were significantly correlated with the qualitative staging of sonographic features (r = 0.781, P 〈 0.0001), peritoneoscopy (r = 0.786, P 〈 0.0001) and histology (r = 0.779, P 〈 0.0001). We concluded that our proposed sonographic staging is well correlated with peritoneoscopic and histological staging of liver diseases, with only a small discrepancy, and can be used clinically to demonstrate the ongoing severity of liver diseases.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1005491018415
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  • 4
    Electronic Resource
    Electronic Resource
    Studies on formaldehyde resins, 15.Part 14: cf.1. Base-catalyzed hydrolysis of bis(hydroxymethyl)melamine (1978)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 179 (1978), S. 877-885 
    Details
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: The hydrolysis of N,N′-bis(hydroxymethyl)melamine [6-amino-2,4-bis(hydroxymethylamino)-1,3,5-triazine] to N-(hydroxymethyl)melamine [2,4-diamino-6-(hydroxymethylamino)-1,3,5-triazine] was studied in dimethyl sulfoxide/water (volume ratio 1:9) using sodium hydroxide as a basic catalyst, in the region [Sodium hydroxide]0=0 to 2 mol·1-1. The study of the dependence of logk on the pH revealed that logk is nearly constant in the range of pH≈8-10 and increases with the slope of d(logk)/d(pH)≈1 in the region of pH≈11-13,5, followed by a gradual saturation at a stronger basic region where k is a first order rate constant. A rate equation for the hydrolysis is proposed, and the hydrolysis mechanism was elucidated by comparison of the theoretical curves resulting from this rate equation with the corresponding experimental curves.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1978.021790402
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