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  • 1
    Electronic Resource
    Electronic Resource
    Lyn, a src-like tyrosine-specific protein kinase, is expressed in HL60 cells induced to monocyte-like or granulocyte-like cells
    Amsterdam : Elsevier
    Biochemical and Biophysical Research Communications 185 (1992), S. 91-95 
    Details
    ISSN: 0006-291X
    Keywords: [abr] 1,25 [OH]"2 D"3; 1,25 dihydroxyvitamin D"3 ; [abr] MPO; myeloperoxidase ; [abr] PMA; phorbol 12-myristate 13-acetate
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/S0006-291X(05)80959-3
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Lyn, a src-like tyrosine-specific protein kinase, is expressed in HL60 cells induced to monocyte-like or granulocyte-like cells
    Amsterdam : Elsevier
    Biochemical and Biophysical Research Communications 185 (1992), S. 91-95 
    Details
    ISSN: 0006-291X
    Keywords: [abr] 1,25 [OH]"2 D"3; 1,25 dihydroxyvitamin D"3 ; [abr] MPO; myeloperoxidase ; [abr] PMA; phorbol 12-myristate 13-acetate
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/S0006-291X(05)80959-3
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Miniemulsion polymerization of styrene stabilized by nonionic surfactant and reactive cosurfactant (1997)
    Springer
    Colloid & polymer science 275 (1997), S. 1060-1067 
    Details
    ISSN: 1435-1536
    Keywords: Key words Miniemulsion polymerization ; nonionic surfactant ; reactive cosurfactants ; styrene ; emulsion stability
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Summary  A nonionic surfactant, nonylphenol polyethoxylate with an average of 40 ethylene oxides per molecule (NP-40), in combination with a reactive cosurfactant such as dodecyl methacrylate (DMA) or stearyl methacrylate (SMA) was used to prepare stable styrene miniemulsions in this study. Like conventional cosurfactants such as cetyl alcohol (CA) and hexadecane (HD), the reagent DMA or SMA may act as a cosurfactant in stabilizing the homogenized miniemulsions. Furthermore, the methacrylate group can be chemically incorporated into latex particles in subsequent miniemulsion polymerization, as shown by the IR spectra. The rate of Ostwald ripening for these miniemulsions in the decreasing order is: CA〉 DMA〉HD∼SMA. This trend correlates well with the water solubility of these cosurfactants. The lower the levels of NP-40 and DMA, the greater is the degree of Ostwald ripening. This is because the DMA concentration is not high enough to counteract diffusional degradation of monomer droplets. Polystyrene latex particles were produced via both monomer droplet nucleation and homogeneous (or micellar) nucleation for the system exhibiting strong Ostwald ripening and/or droplet coalescence during the very early stage of polymerization. On the other hand, monomer droplet nucleation becomes more important for the system showing weak Ostwald ripening. Temperature has an important influence on the shelf-life of miniemulsions and subsequent polymerization. This is attributed to the fact that hydrogen bonds between the polyethylene oxide part of NP-40 and water are quite sensitive to changes in temperature.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003960050184
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Miniemulsion polymerization of styrene using alkyl methacrylates as the reactive cosurfactant (1997)
    Springer
    Colloid & polymer science 275 (1997), S. 546-554 
    Details
    ISSN: 1435-1536
    Keywords: Key words Miniemulsion polymerization ; reactive cosurfactants ; styrene ; alkyl methacrylates ; emulsion stability
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract  Stable styrene miniemulsions were prepared by using alkyl methacrylates as the reactive cosurfactant. Like conventional cosurfactants (e.g., cetyl alcohol (CA) and hexadecane (HD)), alkyl methacrylates (e.g., dodecyl methacrylate (DMA) and stearyl methacrylate (SMA)) may act as a cosurfactant in stabilizing the homogenized miniemulsions. Furthermore, the methacrylate group may be chemically incorporated into latex particles in subsequent miniemulsion polymerization. The data of the monomer droplet size, creaming rate and phase separation of monomer as a function of time were used to evaluate the shelf-life of miniemulsions stabilized by sodium dodecyl sulfate in combination with various cosurfactants. Polystyrene latex particles were produced via both monomer droplet nucleation and homogeneous nucleation in the miniemulsion polymerization using CA or DMA as the cosurfactant, with the result of a quite broad particle size distribution. On the other hand, the miniemulsion polymerization with HD or SMA showed a predominant monomer droplet nucleation. The resultant particle size distribution was relatively narrow. In miniemulsion polymerization, the less hydrophobic DMA is similar to CA, whereas the more hydrophobic SMA is similar to HD.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003960050117
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    On bicubic transformation for the numerical evaluation of Cauchy principal value integrals (1993)
    Chichester : Wiley-Blackwell
    Communications in Numerical Methods in Engineering 9 (1993), S. 307-311 
    Details
    ISSN: 1069-8299
    Keywords: Engineering ; Engineering General
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mathematics , Technology
    Notes: Recently a bicubic transformation was introduced to numerically compute the Cauchy principal value (CPV) integrals. Numerical results show that this new method converges faster than the conventional Gauss-Legendre quadrature rule when the integrand contains different types of singularity. Assume η is the singular point of a CPV integral. The point η divides the interval [-1, 1] into two parts: [-1, η] and [η, 1]. The bicubic transformation maps the intervals [-1, η] and [η, 1] to the interval [-1, 1] with the following constraints: it maps the point η - ∊ to μn, and η + ∊ to -μn, where μn is the largest Gaussian point of an n-point Gauss-Legendre quadrature rule, and ∊ is a user-supplied constant. The n-point Gauss-Legendre quadruture rule is then applied. In contrast to ordinary expectation, further numerical experiment shows that smaller ∊ does not always produce better results. In this paper we are concerned with the selection of ∊ to yield rapid convergence of numerical integration when the bicubic transformation method is applied.
    Additional Material: 3 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cnm.1640090404
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    An efficient dual boundary element technique for a two-dimensional fracture problem with multiple cracks (1995)
    Chichester [u.a.] : Wiley-Blackwell
    International Journal for Numerical Methods in Engineering 38 (1995), S. 1739-1756 
    Details
    ISSN: 0029-5981
    Keywords: dual boundary element ; fracture mechanics analysis ; multiple cracks ; Engineering ; Engineering General
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mathematics , Technology
    Notes: An efficient dual boundary element technique for the analysis of a two-dimensional finite body with multiple cracks is established. In addition to the displacement integral equation derived for the outer boundary, since the relative displacement of the crack surfaces is adopted in the formulation, only the traction integral equation is established on one of the crack surfaces. For each crack, a virtual boundary is devised and connected to one of the crack surfaces to construct a closed integral path. The rigid body translation for the domain enclosed by the closed integral path is then employed for evaluating the hypersingular integral. To solve the dual displacement/traction integral equations simultaneously, the constant and quadratic isoparametric elements are taken to discretize the closed integral paths/crack surfaces and the outer boundary, respectively. The present method has distinct computational advantages in solving a fracture problem which has arbitrary numbers, distributions, orientations and shapes of cracks by a few boundary elements. Several examples are analysed and the computed results are in excellent agreement with other analytical or numerical solutions.
    Additional Material: 11 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/nme.1620381009
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    Paper (German National Licenses)
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