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  • 1
    Electronic Resource
    Electronic Resource
    Pump polarization effects in synchronously pumped mode-locked dye lasers (1991)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 69 (1991), S. 1866-1871 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The effects of pump polarization on the performance of synchronously pumped mode-locked dye lasers have been investigated. A semiclassical model is derived and the numerical results are compared with experimental data. The theoretical pump polarization dependencies of the pulse shape, pulse width, peak power, and pulse delay have been determined, and experimental data obtained with an argon-pumped rhodamine 6G dye laser are in good agreement with the theory.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.348756
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  • 2
    Electronic Resource
    Electronic Resource
    Huperserratinine from Huperzia serrata
    Amsterdam : Elsevier
    Phytochemistry 36 (1994), S. 1069-1072 
    Details
    ISSN: 0031-9422
    Keywords: Huperzia serrata ; Lycopodiaceae ; Lycopodium alkaloids ; NMR assignments. ; huperserratinine
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/S0031-9422(00)90493-X
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  • 3
    Electronic Resource
    Electronic Resource
    Anthraquinones from Knoxia valerianoides
    Amsterdam : Elsevier
    Phytochemistry 36 (1994), S. 765-768 
    Details
    ISSN: 0031-9422
    Keywords: 2-ethoxymethylknoxiavaledin ; 2-formylknoxiavaledin ; 2-hydroxymethylknoxiavaledin ; 3-methylalizarin ; Knoxia valerianoides ; NMR assignments. ; Rubiaceae ; anthraquinones ; damnacanthal ; damnacanthol ; ibericin ; knoxiadin ; nordamnacanthal ; structure determination
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/S0031-9422(00)89813-1
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  • 4
    Electronic Resource
    Electronic Resource
    Radiation instrumentation with the microelectronical technique
    Amsterdam : Elsevier
    Nuclear Instruments and Methods in Physics Research Section A: 299 (1990), S. 298-301 
    Details
    ISSN: 0168-9002
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0168-9002(90)90795-8
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  • 5
    Electronic Resource
    Electronic Resource
    TEM observation of (E-CE)/PAA composite polymerized by ultraviolet initiation (1992)
    Springer
    Polymer bulletin 27 (1992), S. 535-542 
    Details
    ISSN: 1436-2449
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract From the ethyl-cyanoethyl cellulose (E-CE)C/acrylic acid (AA) solution, the (E-CE)C/PAA composite can be prepared by polymerizing the AA with ultraviolet initiation. The (E-CE)C/PAA composite prepared from the cholesteric liquid crystalline solution shows the lamellar structure with a periodicity ranging from 400 to 600 nm. In the lamellation there is no preferential orientation direction for polymer chains. The PAA is dispersed between the lamellea with small strip-like domains and the PAA and (E-CE)C have been homogeneously mixed in the system.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00300601
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  • 6
    Electronic Resource
    Electronic Resource
    Molecular structure and cholesteric liquid crystalline behavior of ethyl-cyanoethyl cellulose (1995)
    Springer
    Polymer bulletin 34 (1995), S. 203-210 
    Details
    ISSN: 1436-2449
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Summary Ethyl-cyanoethyl cellulose [(E-CE)C] can form lyotropic cholesteric liquid crystals in acrylic acid (AA) and the liquid crystalline behavior is influenced by the concentration and (E-CE)C molecular structure. The critical concentration C1 increases with increasing (E-CE)C molecular weight and is also influenced by the degree of substitution for cyanoethyl. The C1 is lowest when the degree of substitution for cyanoethyl is 0.26. The pitch of cholesteric phase decreases with increasing both the (E-CE)C concentration and the degree of substitution for cyanoethyl and can not be influenced by the molecular weight of (E-CE)C in the molecular weight region of 6x104–5x105.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00316397
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  • 7
    Electronic Resource
    Electronic Resource
    Formation and textures of ethyl-cyanoethyl cellulose/acrylic acid mesophase (1993)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 50 (1993), S. 607-613 
    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: The formation, textures, and optic characteristics of the ethyl-cyanoethyl cellulose [(E-CE)C]/acrylic acid (AA) mesophase were studied using polarizing microscopy, spectro-photometry, and small-angle light scattering (SALS). The disklike, oily streak, planar, pseudoisotropic, polygonal textures and the texture of domains gathered randomly were observed in the mesophase. The polygonal texture in unitary mesomorphic solutions can be regarded as the texture from the combination of deformed mesophase aggregates with the disclike texture. The mesomorphic solution exhibits vivid colors when the concentration is about 42-52 wt % because of its selective reflection to visible light. The wavelength of the light that is selectively reflected shifts to the shorter wavelength, with increasing concentration. © 1993 John Wiley & Sons, Inc.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1993.070500405
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  • 8
    Electronic Resource
    Electronic Resource
    Preparation and structures of ethyl-cyanoethyl cellulose/cross-linked polystyrene composites (1994)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 54 (1994), S. 533-540 
    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: Ethyl-cyanoethyl cellulose [(E-CE)C]/cross-linked polystyrene (PS) composites were prepared via polymerization of styrene in (E-CE)C/styrene solution with glycol diacrylate as a cross-linking reagent. The polymerization of the solution, morphology, and miscibility of (E-CE)C/PS composites were studied with polarizing microscopy, small-angle light scattering (SALS), differential scanning calorimetry (DSC), and transmission electron microscopy (TEM). It was found that the mixing state of the (E-CE)C/PS system and the thermal stability of composites were modified by cross-linking of PS. In the intensively cross-linked composite prepared from the anisotropic solution, there existed cylindrical domains in which (E-CE)C spherulites were dispersed in PS. © 1994 John Wiley & Sons, Inc.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1994.070540503
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  • 9
    Electronic Resource
    Electronic Resource
    Effects of cholesteric order on mechanical properties of (E-CE)C/PAA composites (1995)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 57 (1995), S. 493-498 
    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: The ethyl-cyanoethyl cellulose [(E-CE)C]/poly(acrylic acid) [PAA] composites were prepared via in situ photopolymerization of the (E-CE)C/acrylic acid (AA) solutions, in which the morphology and structure of (E-CE)C was retained as the same as that in the solution. The strength and the modulus of the composites depended on their morphology and structure. The strength of the composites with a completely amorphous state or with a completely cholesteric order did not significantly change with increasing (E-CE)C content, although the strength of the composites with completely cholesteric order is much higher than with the completely amorphous state. However, when the (E-CE)C content changed from 33.8% to 42.5%, in which the composites had both cholesteric order and amorphous phases, the strength of the composites greatly increased with increasing (E-CE)C. The elastic modulus of the composites with completely isotropic structure decreases with increasing (E-CE)C content but abruptly increases with increasing the fraction of cholesteric phase in the composites. The (E-CE)C with cholesteric order had a significant enhancing effect on the strength of the composites. The stress-strain curves indicated that the composites with completely amorphous or completely cholesteric order were breakable, while they were tough in the case when they had both cholesteric and amorphous phases. © 1995 John Wiley & Sons, Inc.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1995.070570411
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  • 10
    Electronic Resource
    Electronic Resource
    Characterization and radical polymerization of (E-CE)C/AA mesomorphic solutions (1993)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 49 (1993), S. 125-132 
    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: Ethyl-cyanoethyl cellulose (E-CE)C/poly (acrylic acid) (PAA) composites were prepared by polymerizing acrylic acid (AA) in (E-CE) C/AA cholesteric liquid crystalline solutions. The morphology and structure and the compatibility of composites prepared in different conditions were studied by small-angle light scattering (SALS), differential scanning calorimetry (DSC), X-ray spectrometry, polarizing microscopy, and electron microscopy. Ho-mogeneous composites with the cholesteric structure could be obtained by photopolymerization. During the photopolymerization, however, the morphology of the liquid crystalline domains became crylindric and the axial direction of the cylindric domain was at an angle of about 45° to the layers of the ordered molecular chains. The polymerization initiated by azobisisobutyronitrile (AIBN) resulted in the phase separation. The morphology of the liquid crystalline domains was maintained although the cholesteric structure of the composite was partly destroyed. © 1993 John Wiley & Sons, Inc.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1993.070490115
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