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  • Bidens pilosa  (2)
  • mechanical properties  (2)
  • 31.30.Gs  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Chalcone glucosides from Bidens pilosa
    Amsterdam : Elsevier
    Phytochemistry 28 (1989), S. 247-249 
    Details
    ISSN: 0031-9422
    Keywords: Asteraceae ; Bidens pilosa ; chalcones ; okanin 3',4'-diglucoside ; okanin 3'-glucoside ; okanin 4'-(6''-O-acetylglucoside). ; okanin 4'-diglucoside ; okanin 4'-glucoside
    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)85049-6
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    A methylated chalcone glucoside from Bidens pilosa
    Amsterdam : Elsevier
    Phytochemistry 27 (1988), S. 3700-3701 
    Details
    ISSN: 0031-9422
    Keywords: Asteraceae ; Bidens pilosa ; chalcones ; okanin 4-methyl ether 3'-glucoside.
    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(88)80806-9
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Effect of Heat Treatment and Additives on the Photochromic and Mechanical Properties of Sol-Gel Derived Photochromic Coatings Containing Spirooxazine (1997)
    Springer
    Journal of sol gel science and technology 8 (1997), S. 923-926 
    Details
    ISSN: 1573-4846
    Keywords: photochromism ; photochromic coatings ; spirooxazine ; photochromic properties ; mechanical properties
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The experimental results on the photochromic and mechanical properties of coatings containing 1,3-dihydro-1,3,3-trimethylspiro[2H-indole-2,3′-(3H)-naphth(2,1-b)(1,4) oxazine] (SO) derived from 3-glycidyloxypropyltrimethoxysilane (GPTMS), bisphenol A (BPA) and 1-methylimidazole (MI) by sol-gel processing are presented. It is shown that heat treatment temperature is a conflicting factor to the photochromic intensity (Δ A 0), photostability and abrasion resistance of the photochromic coatings. With increasing densification temperature the matrix rigidity increases leading to a decrease of Δ A 0 and at the same time an enhancement of both abrasion resistance and photostability, the optimum heat treatment temperature is 110°C under our experimental conditions. By the use of certain additives, e.g., fluorosilanes (FAS), not only Δ A 0 but also the photostability and the abrasion resistance of the photochromic coatings have been further improved.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1018384913360
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    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Effect of heat treatment and additives on the photochromic and mechanical properties of sol-gel derived photochromic coatings containing spirooxazine (1997)
    Springer
    Journal of sol gel science and technology 8 (1997), S. 923-926 
    Details
    ISSN: 1573-4846
    Keywords: photochromism ; photochromic coatings ; spirooxazine ; photochromic properties ; mechanical properties
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The experimental results on the photochromic and mechanical properties of coatings containing 1,3-dihydro-1,3,3-trimethylspiro[2H-indole-2,3′-(3H)-naphth(2,1-b)(1,4) oxazine] (SO) derived from 3-glycidyl-oxypropyltrimethoxysilane (GPTMS), bisphenolA (BPA) and 1-methylimidazole (MI) by sol-gel processing are presented. It is shown that heat treatment temperature is a conflicting factor to the photochromic intensity (ΔA 0), photostability and abrasion resistance of the photochromic coatings. With increasing densification temperature the matrix rigidity increases leading to a decrease of ΔA 0 and at the same time an enhancement of both abrasion resistance and photostability, the optimum heat treatment temperature is 110°C under our experimental conditions. By the use of certain additives, e.g., fluorosilanes (FAS), not only ΔA 0 but also the photostability and the abrasion resistance of the photochromic coatings have been further improved.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02436961
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    The 3d states of23Na and7Li: determination of unresolved hyperfine splittings and radiative lifetimes (1988)
    Springer
    The European physical journal 8 (1988), S. 109-118 
    Details
    ISSN: 1434-6079
    Keywords: 07.65.Eh ; 31.30.Gs ; 31.50.+w ; 32.70.Cs ; 32.70.Fw ; 32.70.Jz ; 32.30.Jc ; 35.10.Fk ; 42.65.Ft
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The electronic transitions from the ground state to the 3d states have been studied for23Na and7Li atoms by two-photon Doppler-free laser spectroscopy. The positions of the resonances are used to determine the unresolved hyperfine structure of the 3d states from which the magnetic-dipole hyperfine interaction constantsA are derived. The results for theA factors are:A(3d 2 D 3/2;23Na)=+527(25) kHz;A(3d 2 D 5/2;23Na)=+108.5(2.4) kHz;A(3d 2 D 3/2;7Li)=+843(41) kHz;A(3d 2 D 5/2;7Li)=+343.6(1.0) kHz. For the fine structure intervals fs of the 3d doublets we obtain: fs(3d Na)=-1 494 444(44) kHz and fs(3d Li)=+1 083 936(60) kHz. The linewidths of the resonances are evaluated with respect to the natural lifetimes of the 3d states. For Na the result is τ(3d Na)=19.27(23) ns.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01384502
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    Paper (German National Licenses)
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