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  • 1
    Digitale Medien
    Digitale Medien
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 469 (1986), S. 0 
    ISSN: 1749-6632
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Allgemeine Naturwissenschaft
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 589 (1990), S. 0 
    ISSN: 1749-6632
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Allgemeine Naturwissenschaft
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 3
    Digitale Medien
    Digitale Medien
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 613 (1990), S. 0 
    ISSN: 1749-6632
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Allgemeine Naturwissenschaft
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 4
    Digitale Medien
    Digitale Medien
    Springer
    Entomologia experimentalis et applicata 43 (1987), S. 67-72 
    ISSN: 1570-7458
    Schlagwort(e): Spodoptera exigua ; beet armyworm ; Noctuidae ; larval behaviour ; glasshouse crops ; nuclear polyhedrosis virus
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Beschreibung / Inhaltsverzeichnis: Résumé La consommation et la dispersion des chenilles de Spodoptera exigua sont examinées sur chrysanthèmes et tomates de serre. Les adults déposent les oeufs généralement au feuilles près du sol. Apres l'éclosion les chenilles graduellement se mouvent en haute dans les chrysanthèmes et consomment principalement les feuilles les plus hautes. Dans tomate, cependant, les chenilles s'alimentent principalement au feuilles près du sol. Pendant leur dévelopment les chenilles originaires d'une seule pond de 35 oeufs peuvent endommager environ go petits ou so hautes crysanthè mes. Jusqu'à la quatrième stade larvale les chenilles s'alimentent principalement avec le surface inférieure des feuilles, sans consommer l'épiderme supérieure. Les cinq stades larvales contribuent respectivement 0,1, 0,4, 4, 20 et 75% a la consommation totale des feuilles de chrysanthème. Les resultats des expériments sur la conduite larvale suggestent que les viruses de la polyédrose nucléaire doivent être appliqués préférablement sur la face inférieure des feuilles bas de chrysanthème et de tomate avant que les chenilles se développent a la troisième stade larvale. Quand les larves sur chrysanthèmes sont déja dans le troisième stade larvale, application du virus sur les feuilles plus haute probablement donnait des resultats optimal.
    Notizen: Abstract On chrysanthemum crops the larvae of the beet armyworm Spodoptera exigua (Hübner) (Lep.: Noctuidae) moved upwards to the top of plants after hatching and predominantly fed on the upper foliage layers. On tomato, however, the larvae did not move upwards and mainly fed on the lower leaves. On chrysanthemums up to the fourth instar most feeding occurred at the underside of foliage while the upper-epidermis remained intact. Larvae dispersing from a single egg batch of 35 eggs damaged about 90 small and 50 tall chrysanthemum plants during their development. The successive larval stages contributed respectively 0.1, 0.4, 4, 20 and 75 percent to the total foliage consumption. The results indicated that the virus preferably should be applied to the lower leaves of tomatoes and chrysanthemums when young instars are present, but to the upper-middle and top leaves of chrysanthemums when the larvae are older than second instars.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 5
    Digitale Medien
    Digitale Medien
    Springer
    Entomologia experimentalis et applicata 43 (1987), S. 73-80 
    ISSN: 1570-7458
    Schlagwort(e): nuclear polyhedrosis virus ; Spodoptera exigua ; beet armyworm ; biological control ; Noctuidae ; glasshouse crops
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Beschreibung / Inhaltsverzeichnis: Résumé Les résultats d'applications d'un virus de la polyédrose nucléaire contre des populations de chenilles de Spodoptera exigua sont examinés dans des chrysanthèmes, gerberas, kalanchoës et tomates. Une dose de 1×108 PIBs/m2 résulte à 95–100% mortalité larvale dans tous les végétaux. L'effet sur chemilles de première et seconde stade larvale et sur chenilles de troisième et quatrième stade larvale était pareille. Malgré le niveau élevé du mortalité larvale les végéteaux étaient damagés sérieusement, particulièrement quand le virus était appliqué contre des chenilles de troisième et quatrième stade larvale. Comparée avec des pesticides chimiques, méthomyl et diflubenzuron, applications de virus résultent à un mortalité larvale plus haute. Le conclusion était que le virus est un candidat sérieus pour l'utilisation dans le lutte biologique contre les chenilles de S. exigua dans des serres en Pays Bas.
    Notizen: Abstract the efficacy of a nuclear polyhedrosis virus, SeNPV, for controlling larval populations of the beet armyworm, Spodoptera exigua (Noctuidae) was studied in chrysanthemum, gerbera, kalanchoë and tomato crops in glasshouses. Applications of 1×108 PIBs/m2 on the various crops resulted in 95–100% larval mortality. Virus applications caused comparable levels of mortality in populations of early and late instar larvae. Reduction in feeding damage to the crops, however, was more pronounced when the larvae were early instars at the time of virus application. Single applications with the virus resulted in higher levels of larval mortality as double applications with 0.1% methomyl and diflubenzuron. The virus appears to be a potential control agent for the beet armyworm in Dutch glasshouses.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 6
    Digitale Medien
    Digitale Medien
    Springer
    Bioprocess and biosystems engineering 3 (1988), S. 37-41 
    ISSN: 1432-0797
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Werkstoffwissenschaften, Fertigungsverfahren, Fertigung
    Notizen: Abstract A mathematical model for the design of bubble-columns for growth of shear-sensitive insect cells is presented. The model is based on two assumptions. First, the loss of cell viability as a result of aeration is a first-order process. Second, a hypothetical volume X, in which all viable cells are killed, is associated with each air bubble during its lifetime. The model merely consists of an equation for k d, the first-order death-rate constant, and A min, the minimum specific surface area of the air bubbles to supply sufficient oxygen. In addition to X, the equation for k d contains the air flow F, the air-bubble diameter d b, the diameter D and the height H of the bubble column. This equation has been experimentally validated. Comparison of the equations for k d and A min shows that especially H is the key parameter to manipulate in bubble-column design in order to meet the demands set by A min and k d〈kg, the first-order growth-rate constant. It is concluded that net growth of cells is enhanced as size and height of the bubble column increase.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 7
    Digitale Medien
    Digitale Medien
    Springer
    Applied microbiology and biotechnology 31 (1989), S. 434-434 
    ISSN: 1432-0614
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Werkstoffwissenschaften, Fertigungsverfahren, Fertigung
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 8
    Digitale Medien
    Digitale Medien
    Springer
    Applied microbiology and biotechnology 30 (1989), S. 497-501 
    ISSN: 1432-0614
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Werkstoffwissenschaften, Fertigungsverfahren, Fertigung
    Notizen: Summary A model, suitable for reactor-design purposes, is presented for the infection process of insect cells with baculovirus in a continuous bioreactor system. The infection process can be described by a first-order reaction mechanism if the viable, non-infected, insect cells are regarded as substrate, and the resulting polyhedra as product. Experimental results from continuous systems, consisting of a series of mixed reactors in which growth of Spodoptera frugiperda cells takes place in the first reactor and infection with Autographa californica nuclear polyhedrosis virus in the other reactors in the series, show typical values for the reaction rate constant of 0.7–1.0 10-5 s-1.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 9
    Digitale Medien
    Digitale Medien
    Springer
    Applied microbiology and biotechnology 33 (1990), S. 43-47 
    ISSN: 1432-0614
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Werkstoffwissenschaften, Fertigungsverfahren, Fertigung
    Notizen: Summary Insect cells (Spodoptera frugiperda) were cultured in a continuous stirred-tank reactor. The effluent was led to a cascade of another two reactors, each containing half the volume of the cell-growth reactor, where the cells were infected with Autographa californica nuclear polyhedrosis virus. For about 10 days production of 107 polyhedra (virus particles embedded in a protein capsule) per cm3 was achieved. This short production time compared to previous experiments involving an analogous system with a single infection vessel of equal volume to the cell-growth vessel is ascribed to the accelerated occurence of the so-called passage effect (a decrease of infectious virus with time). From the results of a computer model it was concluded that this passage effect was accelerated by the change in residence time distribution as compared to the earlier experiments. time distribution as compared to the earlier experiments.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 10
    ISSN: 1432-8798
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Summary At least two regions ofAutographa californica Nuclear Polyhedrosis Virus (AcMNPV) DNA contain nucleotide sequences that allowed the autonomous replication of chimaeric plasmids inSaccharomyces cerevisiae. These sequences were located around position 26 and 37 per cent on the physical map of AcNPV DNA.
    Materialart: Digitale Medien
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