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  • 1
    Electronic Resource
    Electronic Resource
    Effect of lignans and other secondary metabolites of the asteraceae on the mono-oxygenase activity of the european corn borer
    Amsterdam : Elsevier
    Phytochemistry 28 (1989), S. 1373-1377 
    Details
    ISSN: 0031-9422
    Keywords: Asteraceae ; European corn borer ; Ostrinia nubilalis ; aldrin epoxidase. ; cytochrome P-450 ; lignans, sesquiterpene lactones ; mono-oxygenases ; polyacetylenes
    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)97749-5
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  • 2
    Electronic Resource
    Electronic Resource
    The Schur algorithm and its applications (1985)
    Springer
    Acta applicandae mathematicae 3 (1985), S. 255-284 
    Details
    ISSN: 1572-9036
    Keywords: 35P25 ; 47B35 ; 65M25 ; 86.34 ; 93E10 ; Inverse scattering ; two-component wave equations ; scattering matrix ; fast Cholesky recursions ; Schur algorithm ; inverse seismic problem ; linear estimation ; ladder filters
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Notes: Abstract The Schur algorithm and its time-domain counterpart, the fast Cholseky recursions, are some efficient signal processing algorithms which are well adapted to the study of inverse scattering problems. These algorithms use a layer stripping approach to reconstruct a lossless scattering medium described by symmetric two-component wave equations which model the interaction of right and left propagating waves. In this paper, the Schur and fast Chokesky recursions are presented and are used to study several inverse problems such as the reconstruction of nonuniform lossless transmission lines, the inverse problem for a layered acoustic medium, and the linear least-squares estimation of stationary stochastic processes. The inverse scattering problem for asymmetric two-component wave equations corresponding to lossy media is also examined and solved by using two coupled sets of Schur recursions. This procedure is then applied to the inverse problem for lossy transmission lines.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00047331
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  • 3
    Electronic Resource
    Electronic Resource
    Insecticidal defenses of Piperaceae from the neotropics (1995)
    Springer
    Journal of chemical ecology 21 (1995), S. 801-814 
    Details
    ISSN: 1573-1561
    Keywords: Piperaceae ; botanical insecticide ; isobutyl amides ; lignans ; dillapiol ; conocarpan ; piperlonguminine ; European corn borer
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Insecticidal and growth-reducing properties of extracts of 14 species of American neotropical Piperaceae were investigated by inclusion in diets of a polyphagous lepidopteran, the European corn borer,Ostrinia nubilalis. Nutritional indices suggested most extracts acted by postdigestive toxicity.Piper aduncum, P. tuberculatum, andP. decurrens were among the most active species and were subjected to bioassay-guided isolation of the active components. Dillapiol was isolated from the active fraction ofP. aduncum, piperlonguminine was isolated fromP. tuberculatum, and a novel neolignan fromP. decurrens. The results support other studies on Asian and AfricanPiper species, which suggest that lignans and isobutyl amides are the active defence compounds in this family.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02033462
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    Paper (German National Licenses)
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