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  • 1
    Electronic Resource
    Electronic Resource
    Immobilization of enzyme onto cellulose-titanium oxide composite fiber (1993)
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 42 (1993), S. 394-397 
    Details
    ISSN: 0006-3592
    Keywords: cellulose ; immobilization ; fiber ; titanium oxide ; Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Fibers of a cellulose-TiO2 composite were prepared by the reaction of cellulose with titanium iso-propoxide. Enzymes were immobilized on the fibers easily and simply under mild conditions. The fibers were stable in common solvents, high ionic solutions, and over a wide range of pH values 3-10. © 1993 John Wiley & Sons, Inc.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bit.260420318
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  • 2
    Electronic Resource
    Electronic Resource
    Quantitative investigation of the O2+-induced topography of GaAs and other III-V semiconductors: An STM study of the ripple formation and suppression of the secondary ion yield change by sample rotation (1995)
    Chichester [u.a.] : Wiley-Blackwell
    Surface and Interface Analysis 23 (1995), S. 506-513 
    Details
    ISSN: 0142-2421
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Physics
    Notes: Roughening procedures including the early stage of the O2+-induced ripple formation of GaAs were studied quantitatively by scanning tunnelling microscopy (STM). Detailed examinations of the beginning of topography development using fast Fourier transform of the STM images revealed that the ripple formation was not caused by any accidental defects, particles or original irregularity on the substrate, but solely by the conditions of the ion beam. A systematic investigation of the rippled GaAs surface produced under various O2+ bombardment conditions was conducted. The ripple wavelength and the transition depth were almost exactly proportional to EPcos θ, where EP and θ are the energy of the ion beam and the incident angle, respectively. For GaAs, the secondary ion yield transition occurs when the slope of ripples facing the incident O2+ beam reaches a saturation angle of 20-30° from the macroscopic surface plane. Topography change on other III-V semiconductors was also examined for comparison. There was no ripple generation observed for GaP; InP gave a ripple-like structure without secondary ion yield change. A relatively rough surface resulted on GaSb and InAs at a much shallower depth than for GaAs. Rippling and ion yield changes during depth profiling have been suppressed successfully by sample rotation even in a magnetic sector-based instrument.
    Additional Material: 11 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/sia.740230710
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  • 3
    Electronic Resource
    Electronic Resource
    Mass spectrometry in cardenolide chemistry - II (1970)
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 4 (1970), S. 215-219 
    Details
    ISSN: 0030-493X
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Six partial acetates of gitoxin have been used to establish the value of mass spectrometry, when used in conjunction with deuteroacetylation, in cardenolide structural studies. This technique permits the unambiguous location of acetyl groups upon any of the digitoxose residues, and in some cases confirms acetylation of C16 of the steroid ring. The method is suitable for metabolic studies. The spectra discussed show that neither acetyl exchange nor acetyl migration reactions had taken place during the deuteroacetylation step.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/oms.1210040124
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