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  • 1
    Electronic Resource
    Electronic Resource
    Non-destructive determination of the residual monomer content in polymers by Raman spectroscopy (1993)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 194 (1993), S. 1527-1536 
    Details
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: By a comparative study and by calibration, Raman spectroscopy is established as a non-destructive method for the determination of the monomer concentration in solid poly(methyl methacrylate) samples. Although the effect of the internal field on the refractive index and on the Raman intensity of a polymer solution in a monomer is considered, the Raman scattering cross section of the carbonyl stretching vibration of the monomer turns out to be more than twice as large as that of the polymer.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1993.021940601
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  • 2
    Electronic Resource
    Electronic Resource
    Interfaces and interphases of (bio)materials: Definitions, structures, and dynamics (1997)
    Weinheim : Wiley-Blackwell
    Advanced Materials 9 (1997), S. 513-518 
    Details
    ISSN: 0935-9648
    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
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/adma.19970090614
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  • 3
    Electronic Resource
    Electronic Resource
    Microstructural characterisation of nanocrystalline GaN prepared by detonations of gallium azides (1998)
    New York, NY [u.a.] : Wiley-Blackwell
    Advanced Materials for Optics and Electronics 8 (1998), S. 135-146 
    Details
    ISSN: 1057-9257
    Keywords: gallium nitride ; nanocrystallites ; detonation ; gallium azide ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Electrical Engineering, Measurement and Control Technology , Physics
    Notes: High quality nanoscale, phase-pure hexagonal gallium nitride (GaN) crystallites have been synthesized by the thermal induced detonation of molecular precursors of the type (R3N)Ga(N3)3 (R=CH3, C2H5, etc.). The method allows the control of the particle size regime from 2 to about 1000 nm. X-ray diffraction and Rietveld simulations revealed an anisotropic platelet-like shape of the particles. The obtained GaN material was as well characterized by transmission electron microscopy and electron diffraction, photoluminescence spectroscopy, SEM, IR, RAMAN, thermal gas effusion/mass spectrometry, thermal analysis, elemental analysis. Gas absorption measurements (BET method) showed a specific surface area of about 90 m2 · g-1. © 1998 John Wiley & Sons, Ltd.
    Additional Material: 10 Ill.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Polarographic and electrochemical studies of some aromatic nitro compounds: Part VIII. Effects of solvents and surfactants on current-voltage curves obtained with DC and differential pulse polarography (1995)
    Weinheim : Wiley-Blackwell
    Electroanalysis 7 (1995), S. 132-137 
    Details
    ISSN: 1040-0397
    Keywords: Differential pulse polarography ; Aromatic nitro compounds ; Surfactants ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Differential pulse polarography (DPP) is an excellent analytical method, but cannot be recommended for applications in the initial stages of mechanistic studies. Its application is also questionable in the analysis of samples containing varying concentrations of an organic cosolvent or of surface active compounds. The effect on limiting currents obtained by DC polarography and on peak currents obtained by DPP was demonstrated for reductions of various nitrobenzene derivatives. The similarity of changes in current for various nitrobenzenes enables the exclusion of the formation of adducts or micelles as the predominant effect. The decrease of the limiting currents in all cases is much smaller than the decrease of DPP peak currents, due to strong effects of the surfactants on the kinetics of electroreduction. For the analysis of natural products or of solutions containing varying amounts of organic cosolvent, the measurement of the DC polarographic limiting current is preferred. An addition of 30% ethanol minimizes the effects of the varying concentration of surfactant on both DC polarographic limiting and DPP peak currents.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/elan.1140070207
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  • 5
    Electronic Resource
    Electronic Resource
    Polarographic determination of some pesticides containing nitro group: Application to a study of adsorption on lignin (1992)
    Weinheim : Wiley-Blackwell
    Electroanalysis 4 (1992), S. 11-18 
    Details
    ISSN: 1040-0397
    Keywords: Pesticides ; polarography ; lignin ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The polarographic method proved suitable for investigation of adsorption of acifluorfen (I) (5-[2-chloro-4-(trifluoromethyl)phenoxy]-2′-nitrobenzoic acid) on lignin. Polarographic reduction of acifluorfen in aqueous buffers (pH 〈 7) is complicated by adsorption of the reduction product. In acidic media the reduction of the protonated hydroxylamino group occurs at such positive potentials that only a single six-electron wave is observed. In buffers containing 33% (w/w) ethanol the effects of the adsorption are eliminated and the reduction of the hydroxylamino group occurs at more negative potentials, so that one four-electron and one two-electron wave are observed. Splitting of the four-electron wave at pH 〉 7 is attributed to a decrease in protonation rate of the reduction intermediate. Unsubstituted p-nitrophenyl phenyl ether (II) shows an analogous behavior. Reduction wave of the nitro group can be used for determination of aciflurofen (I), fluorodifen (III), oxyfluorfen (IV), and bifenox (V) in the 1 × 10-5 to 5 × 10-4 M range. Adsorption of acifluorfen depends on the nature of the lignin and pH.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/elan.1140040105
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  • 6
    Electronic Resource
    Electronic Resource
    Dental implant materials: Surface modification and interface phenomenaThis work was supported by the Deutsche Forschungsgemeinschaft (SFB 175 Implantology). (1996)
    Weinheim : Wiley-Blackwell
    Advanced Materials 8 (1996), S. 254-257 
    Details
    ISSN: 0935-9648
    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
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/adma.19960080316
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  • 7
    Electronic Resource
    Electronic Resource
    Detecting margin leakage of dental composite restorations (1983)
    Hoboken, NJ : Wiley-Blackwell
    Journal of Biomedical Materials Research 17 (1983), S. 37-43 
    Details
    ISSN: 0021-9304
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Medicine , Technology
    Notes: The degree of microleakage between a restoration and the cavity wall is difficult to quantify objectively. A silver-staining method is used and compared to the radioisotope method with results that indicate a superior definition and more accurate evaluation of microleakage. In addition to the accuracy, two advantages are presented: (1) scoring of the leakage can be refined and divided into more precise numbers, and (2) teeth can be observed directly in a microscope without resorting to the indirect interpretation of film or photograph.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jbm.820170104
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  • 8
    Electronic Resource
    Electronic Resource
    N-vinyl carbazole copolymers (1981)
    New York : Wiley-Blackwell
    Journal of Polymer Science: Polymer Chemistry Edition 19 (1981), S. 305-310 
    Details
    ISSN: 0360-6376
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The synthesis of N-vinyl carbazole (VCbz) copolymers, some of which contain electron-accepting groups, is described. The new copolymers are: copoly[N-vinyl carbazole-di(2-N-carbazylethyl)-fumarate](II); copoly(N-vinyl carbazole-vinyl-2,4-dinitrobenzene-sulfonate)(IV); copoly(N-vinyl carbazole-vinyl-2,4-dinitrobenzene-sulfenate)(V); copoly(n-butyl acrylate-t-butyl peracrylate)(VII); copoly(n-butyl acrylate-t-butyl acrylate-graft-N-vinyl carbazole)(VIII).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1981.170190208
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  • 9
    Electronic Resource
    Electronic Resource
    Photoconductive copolymers containing N-vinylcarbazole (1977)
    New York : Wiley-Blackwell
    Journal of Polymer Science: Polymer Chemistry Edition 15 (1977), S. 571-584 
    Details
    ISSN: 0360-6376
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The synthesis of N-vinylcarbazole (VCbz) copolymers in which electron-accepting groups are incorporated into the polymer chain is reported. The acceptors were introduced by appropriate reactions of VCbz-vinyl acetate or VCbz-acryloyl chloride copolymers and consisted of 3,5-dinitrobenzoyl, 2,4-dinitrophenyl acrylate, β-2,4-dinitrophenoxy propionate, and trichlorobenzoquinone units. The copolymer containing the 3,5-dinitrobenzoyl units required no chloranil as a dopant to be photoconductive, and in fact showed a slightly improved photoresponse relative to conventional poly VCbz doped with external chloranil.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1977.170150306
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