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  • 1990-1994  (2)
  • Minimum norm estimation  (1)
  • chitinase  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Isolation of a chitin-binding lectin, with insecticidal activity in chemically-defined synthetic diets, from two wild brassica species with resistance to cabbage aphidBrevicoryne brassicae (1994)
    Springer
    Entomologia experimentalis et applicata 72 (1994), S. 181-187 
    Details
    ISSN: 1570-7458
    Keywords: Brassica fruticulosa ; Brassica spinescens ; Brevicoryne brassicae ; lectin ; host-plant resistance ; chitin ; artificial diets ; chitinase
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract A lectin, with a chitin-binding domain and chitinase activity, is present in significant quantities in the wild brassica speciesB. fruticulosa andB. spinescens but at low levels in cultivated cabbage cv. Offenham Compacta. The lectin, purified 〉1000 fold after binding to chitin, migrated on SDS-PAGE gels as a single band with a M r of 14.500. The amino acid composition of the lectin fromB. spinescens indicated high concentrations of asparagine/aspartic acid, glycine, leucine and serine in common with other chitin-binding lectins with insecticidal and antifungal activities. Brassica lectin and the closely related agglutinin from wheatgerm and nettle show significant insecticidal activity when presented toBrevicoryne brassicae in chemically-defined synthetic diets.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02383553
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    L p -spectral estimation with anL ∞-upper bound (1993)
    Springer
    Journal of optimization theory and applications 76 (1993), S. 321-355 
    Details
    ISSN: 1573-2878
    Keywords: Minimum norm estimation ; power spectrum ; bounded constraints
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Notes: Abstract Given the constraint 0≤f≤B, whereB is in the interior of the positive cone ofL ∞, and given a finite number of correlations off, we wish to estimatef. Since only a finite number of correlations are given, this does not uniquely determinef. We estimatef by picking the unique function Φ0 satisfying the constraints and minimizing theL p -norm with 1〈p〈∞. Under suitable conditions, the form of the solution is shown to be $$\Phi _0 (f) = \min \{ B(x), \max \{ 0,P(x)\} ^{1/(p - 1)} \} ,$$ whereP is a linear combination of the correlation functions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00939611
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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