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  • 1
    Electronic Resource
    Electronic Resource
    Intravenous cholangiography in the CT era (1985)
    Springer
    Abdominal imaging 10 (1985), S. 69-74 
    Details
    ISSN: 1432-0509
    Keywords: Computed tomography, comparison with IVC ; Intravenous cholangiography, comparison with CT ; Biliary obstruction, diagnosis ; Ultrasound, comparison with IVC and CT
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract With the availability of computed tomography (CT), ultrasonography (US), percutaneous transhepatic cholangiography (PTC), and endoscopic retrograde cholangiopancreatography (ERCP), the use of intravenous cholangiography (IVC) has waned. A retrospective study of 69 intravenous cholangiograms performed from 1979 through 1982 assessed the utility of intravenous cholangiography, as well as its effect on patient management, at an institution where CT was highly developed. In no case after normal findings on CT and/or ultrasound examination did IVC make a positive pathologic diagnosis. After abnormal results on CT and/or US examinations, in no case did IVC add to the diagnosis. Finally, after technically suboptimal results of CT and/or US examinations, IVC made only 1 positive pathologic diagnosis. Overall, IVC correctly demonstrated only 5 of 9 cases of common duct stones or strictures. Of the 26 cases with anatomical correlation there were a total of 7 false-positive and -negative IVC examinations. In this series, IVC was rarely useful in the diagnosis of biliary tract disease. Given the high inaccuracy rate of IVC in this study, its use for the exclusion of biliary tract disease is discouraged.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01893073
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  • 2
    Electronic Resource
    Electronic Resource
    Evaluation of three effervescent agents for double-contrast upper gastrointestinal radiography (1981)
    Springer
    Abdominal imaging 6 (1981), S. 111-114 
    Details
    ISSN: 1432-0509
    Keywords: Effervescent agents ; Gastrointestinal tract, radiography ; Double contrast, technique
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The agent used to introduce gas into the stomach is an important factor in determining the quality of double-contrast upper gastrointestinal radiography. The efficacy of 3 effervescent agents formulated for use in double-contrast upper gastrointestinal radiography was evaluated in 300 patients. Patients found 2 granular preparations (E-Z-Gas granules and Baros) easier to swallow than a powdered agent (E-Z-Gas powder). Bubble formation and flocculation of barium in the stomach were less of a problem with Baros. Differences in mucosal coating and visualization of areae gastricae were not statistically significant.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01890234
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Kollagen-Polymethylmethacylat-Pfropfcopolymere: Einfluß des wäßrigen organischen Lösungsmittelsystems und von Salzen auf die Copolymer-zusammensetzung (1975)
    Springer
    Colloid & polymer science 253 (1975), S. 801-801 
    Details
    ISSN: 1435-1536
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02464549
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  • 4
    Electronic Resource
    Electronic Resource
    Boundary Layers in Weak Solutions of Hyperbolic Conservation Laws (1999)
    Springer
    Archive for rational mechanics and analysis 147 (1999), S. 47-88 
    Details
    ISSN: 1432-0673
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics , Physics
    Notes: Abstract . This paper is concerned with the initial‐boundary‐value problem for a nonlinear hyperbolic system of conservation laws. We study the boundary layers that may arise in approximations of entropy discontinuous solutions. We consider both the vanishing‐viscosity method and finite‐difference schemes (Lax‐Friedrichs‐type schemes and the Godunov scheme). We demonstrate that different regularization methods generate different boundary layers. Hence, the boundary condition can be formulated only if an approximation scheme is selected first. Assuming solely uniform $L^\infty$ bounds on the approximate solutions and so dealing with $L^\infty$ solutions, we derive several entropy inequalities satisfied by the boundary layer in each case under consideration. A Young measure is introduced to describe the boundary trace. When a uniform bound on the total variation is available, the boundary Young measure reduces to a Dirac mass. From the above analysis, we deduce several formulations for the boundary condition which apply whether the boundary is characteristic or not. Each formulation is based on a set of admissible boundary values, following the terminology of Dubois & LeFloch[15]. The local structure of these sets and the well‐posedness of the corresponding initial‐boundary‐value problem are investigated. The results are illustrated with convex and nonconvex conservation laws and examples from continuum mechanics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002050050145
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  • 5
    Electronic Resource
    Electronic Resource
    Case studies from Malaysian development projects —Geography and development in the Third World (1980)
    Springer
    GeoJournal 4 (1980), S. 66-70 
    Details
    ISSN: 1572-9893
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geography
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00586758
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  • 6
    Electronic Resource
    Electronic Resource
    Rotala cookii: A new species ofLythraceae from India showingHippuris syndrome (1988)
    Springer
    Plant systematics and evolution 159 (1988), S. 141-144 
    Details
    ISSN: 1615-6110
    Keywords: Angiosperms ; Lythraceae ; Rotala ; “Hippuris syndrome”
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract A new aquatic species ofRotala (Rotala cookii) is described from Kerala, India. Growing in the flooded lowlands, along the coastal belt, the plant is a “Hippuris mimic”.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00937431
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  • 7
    Electronic Resource
    Electronic Resource
    Light-induced graft copolymerization of vinyl monomers to collagen by use of benzophenone as sensitizer (1974)
    New York : Wiley-Blackwell
    Journal of Polymer Science: Polymer Chemistry Edition 12 (1974), S. 2953-2956 
    Details
    ISSN: 0360-6376
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1974.170121221
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  • 8
    Electronic Resource
    Electronic Resource
    Estimation of reactivity ratios of acrylate copolymers by 1H-NMR (1983)
    New York : Wiley-Blackwell
    Journal of Polymer Science: Polymer Chemistry Edition 21 (1983), S. 761-765 
    Details
    ISSN: 0360-6376
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Copolymers of methyl methacrylate (MMA) and dimethylaminomethacrylate (DMAEM) are useful for binding of enzymes. Copolymerization of MMA and DMAEM was carried out in dioxane using benzoyl peroxide as an initiator at 70°C. The estimation of the composition of MMA and DMAEM in copolymer was carried by 1H-NMR. The reactivity ratio was found to be r1 = 1.20 and r2 = 0.19 by Kelen-Tüdös method and r1 = 1.24 and r2 = 0.21 by Finemann-Ross method.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1983.170210311
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  • 9
    Electronic Resource
    Electronic Resource
    Grafting of polymeric side chains to gelatin (1982)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 27 (1982), S. 1313-1319 
    Details
    ISSN: 0021-8995
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Kinetics of grafting of poly(butyl acrylate) onto gelatin was studied with H2O2 - ascorbic acid redox systm. Percent grafting, grafting efficiency, Rg, and Rh were determined as a function of time, temperature, initiator, monomer, and backbone concentration. It was found that Rg depends on first power of monomer concentration and 0.5 power to the initiator concentrations. A detailed kinetic scheme is proposed to explain these results.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1982.070270420
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  • 10
    Electronic Resource
    Electronic Resource
    Grafting of methyl methacrylate to nitrocellulose by ceric ions (1979)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 23 (1979), S. 2923-2928 
    Details
    ISSN: 0021-8995
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Studies were carried out on grafting of various vinyl monomers to nitrocellulose by ceric ions. It was observed that graft copolymerization occurred only with methyl methacrylate (MMA) and methyl acrylate monomer. The variables such as initiator concentration, monomer concentration, time of grafting, and nitrocellulose content on grafting of MMA are discussed. By hydrolyzing away the nitrocellulose backbone, the grafted poly(methyl methacrylate) branches were isolated and the 〉c=o peak at 1740 cm-1 in the infrared spectra of these isolated branches gave definite evidence of grafting. The molecular weight of isolated branches has been determined by viscometry. The probable mechanism of grafting may be at the α-carbon atom of primary alcohol or at a C2-C3 glycol group of the anhydro glucose unit or at the hemiacetal group of the end unit of nitrocellulose, as nitrocellulose is formed by the partial nitration of cotton cellulose.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1979.070231009
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