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  • Polymer and Materials Science  (11)
  • chemosystematics.  (4)
  • 3rd- and 2nd-NLO  (2)
  • 1
    Electronic Resource
    Electronic Resource
    Drimane-type sesquiterpenoids from the liverwort Makinoa crispata
    Amsterdam : Elsevier
    Phytochemistry 28 (1989), S. 3377-3381 
    Details
    ISSN: 0031-9422
    Keywords: 6β,7α-dihydroxyconfertifoline ; 6β,7β-epoxyconfertifoline ; 7α-chloro-6β-hydroxyconfertifoline ; Hepaticae ; Makinoa crispata ; Metzgeriales ; chemosystematics. ; crispatanolide ; drimane-type sesquiterpenoid
    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/0031-9422(89)80351-6
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  • 2
    Electronic Resource
    Electronic Resource
    Prenyl bibenzyls from the liverworts Radula perrottetii and Radula complanata
    Amsterdam : Elsevier
    Phytochemistry 30 (1991), S. 235-251 
    Details
    ISSN: 0031-9422
    Keywords: 2(R)-2-isopropenyl-6-hydroxy-4-(2-phehylethyl) dihydrobenzofuran ; 2,2-dimethyl-7,8-dihydroxy-5-(2-phenylethyl) chromene ; 5-lipoxygenase and calmodulin inhibitory activity ; Hepaticae ; Jungermannialies ; Radula perrottetii, R. complanata ; Radulaceae ; chemosystematics. ; prenyl bibenzyls ; radulanin L ; revised structures ; synthesis of prenyl bibenzyls ; vasopressin antagonist activity
    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/0031-9422(91)84130-K
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  • 3
    Electronic Resource
    Electronic Resource
    Prenyl bibenzyls from the liverwort Radula kojana
    Amsterdam : Elsevier
    Phytochemistry 30 (1991), S. 219-234 
    Details
    ISSN: 0031-9422
    Keywords: 5-lipoxygenase and calmodulin inhibitory activity ; Hepaticae ; Jungermanniales ; Radula kojana ; Radulaceae ; benzofuran ; bis(bibenzyls) ; chemosystematics. ; chromenes ; prenyl bibenzyls ; synthesis
    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/0031-9422(91)84129-G
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  • 4
    Electronic Resource
    Electronic Resource
    Bis(bibenzyl) ethers from Pellia endiviifolia
    Amsterdam : Elsevier
    Phytochemistry 30 (1991), S. 1523-1530 
    Details
    ISSN: 0031-9422
    Keywords: 14-hydroxyperrottetin E-11'-methyl ether ; Hepaticae ; Metzgeriales ; Pellia endiviifolia ; bis(bibenzyl) ethers ; chemosystematics. ; perrottetin E ; perrottetin E-11'-methyl ether ; synthesis
    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/0031-9422(91)84201-3
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  • 5
    Electronic Resource
    Electronic Resource
    Third-order nonlinear optical properties and dielectric properties of Pb-complex perovskite thin films prepared by sol-gel method (1997)
    Springer
    Journal of sol gel science and technology 9 (1997), S. 211-218 
    Details
    ISSN: 1573-4846
    Keywords: 3rd- and 2nd-NLO ; dielectric constant ; ferroelectric Pb-complex perovskites ; sol-gel method ; morphotropic phase boundary
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The third-order nonlinear optical properties of the sol-gel derived Pb(Fe1/2Nb1/2)O3-PbTiO3 (PFN-PT) thin films have been investigated by the THG method. The χ(3) values of PFN-PT thin films increased from 3.2×10−12 esu (PT) to 8.5×10−12 esu (PFN) with increasing content of Fe3+ ions which possessed very high second-hyperpolarizability, ψ(Fe2/3O). It was experimentally confirmed that complex oxides such as ABO3-type perovskites consisting of large non-transition metal A-site cations and small transition metal B-site cations exhibited high χ(3) as expected from Lines' model. It was also found that the χ(3) values of complex oxides could be estimated from the second-hyperpolarizabilities of the constituent single oxides reported so far. Because of the large remanent polarization, PT thin films may exhibit the highest χ(3) among the ferroelectric PFN-PT thin films studied in the present work. The maximum dielectric constant, ε, of 1990 at room temperature was obtained for 0.5PFN·0.5PT thin films, whose composition corresponds to so-called morphotropic phase boundary (MPB).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02439400
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  • 6
    Electronic Resource
    Electronic Resource
    Third-Order Nonlinear Optical Properties and Dielectric Properties of Pb-Complex Perovskite Thin Films Prepared by Sol-Gel Method (1997)
    Springer
    Journal of sol gel science and technology 9 (1997), S. 211-218 
    Details
    ISSN: 1573-4846
    Keywords: 3rd- and 2nd-NLO ; dielectric constant ; ferroelectric Pb-complex perovskites ; sol-gel method ; morphotropic phase boundary
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The third-order nonlinear optical properties of the sol-gel derived Pb(Fe1/2Nb1/2)O3-PbTiO3 (PFN-PT) thin films have been investigated by the THG method. The (3) values of PFN-PT thin films increased from 3.2 × 10-12 esu (PT) to 8.5 × 10-12 esu (PFN) with increasing content of Fe3+ ions which possessed very high second-hyperpolarizability, γ (Fe2/3O). It was experimentally confirmed that complex oxides such as ABO3-type perovskites consisting of large non-transition metal A-site cations and small transition metal B-site cations exhibited high χ(3) as expected from Lines' model. It was also found that the χ(3) values of complex oxides could be estimated from the second-hyperpolarizabilities of the constituent single oxides reported so far. Because of the large remanent polarization, PT thin films may exhibit the highest χ(3) among the ferroelectric PFN-PT thin films studied in the present work. The maximum dielectric constant,ɛ , of 1990 at room temperature was obtained for 0.5PFN · 0.5PT thin films, whose composition corresponds to so-called morphotropic phase boundary (MPB).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1026429600633
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  • 7
    Electronic Resource
    Electronic Resource
    Scattering of light by films having nonrandom orientation fluctuations. II (1970)
    New York : Wiley-Blackwell
    Journal of Polymer Science Part A-2: Polymer Physics 8 (1970), S. 1127-1136 
    Details
    ISSN: 0449-2978
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: The theory for scattering of light from films in which the orientation correlation between two scattering elements depends upon the angle β between the optic axes and the vector connecting the two elements is extended. A delta-function type dependence is assumed in which the correlation is strongest when β equals some preferred value β0. Calculated results of scattered intensities are shown to be similar to experimental observations.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1970.160080708
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  • 8
    Electronic Resource
    Electronic Resource
    Scattering of light from oriented polymer films. II (1970)
    New York : Wiley-Blackwell
    Journal of Polymer Science Part A-2: Polymer Physics 8 (1970), S. 1503-1519 
    Details
    ISSN: 0449-2978
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: A statistical theory for the scattering of light from oriented polymer films is developed in terms of angularly dependent generalized correlation functions. Numerical calculations of scattering patterns are carried out for special cases. The scattering depends upon two types of distributions describing (1) the orientation distribution of optical axes of scattering elements and (2) the angular dependence of correlation in orientation between pairs of optic axes. These distributions are expanded in Fourier series (in a two-dimensional treatment), the coefficients of which are functions of elongation and describe the elongation dependence of the scattering patterns.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1970.160080907
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  • 9
    Electronic Resource
    Electronic Resource
    Scattering of light by disordered spherulites. II. Effect of disorder in the magnitude of the anisotropy (1971)
    New York : Wiley-Blackwell
    Journal of Polymer Science Part A-2: Polymer Physics 9 (1971), S. 1747-1761 
    Details
    ISSN: 0449-2978
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: The contribution to the disorder scattering by imperfect spherulites resulting from fluctuations in the magnitude of the anisotropy is analyzed for two-dimensional spherulites. The fluctuations are described in terms of a parameter characterizing the meansquare amplitude of the fluctuation and a correlation function describing the distance over which the correlation occurs. Cases considered are those where the correlation depends on either the radial or the angular separation of the scattering volume elements. As with the case of disorder in orientation, one finds that disorder in anisotropy may result in a nonzero value of intensity at μ = 0° and 90°, a decrease in the higher-order variation of scattered intensity with θ, and an increase in the intensity of scattering at higher values of θ over that for a perfect spherulite. In addition, disorder in the angular direction leads to an increase in the scattered intensity at small values of θ as compared with the zero intensity of scattering from a perfect spherulite at θ = 0°.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1971.160091002
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  • 10
    Electronic Resource
    Electronic Resource
    Scattering of light by deformed disordered spherulites (1971)
    New York : Wiley-Blackwell
    Journal of Polymer Science Part A-2: Polymer Physics 9 (1971), S. 517-529 
    Details
    ISSN: 0449-2978
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: The change in the light-scattering patterns upon deforming two-dimensional disordered spherulites is shown to arise from four effects occurring upon stretching: (1) the change in shape of the spherulite, (2) the change in average orientation of the optic axes of the scattering volume elements, (3) the change in deviation of the optic axis orientation angle from its average value, and (4) the change in the distance over which this deviation is correlated. The effects of these contributions upon the experimental scattering patterns are analyzed.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1971.160090310
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