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  • 1
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Journal of agricultural and food chemistry 22 (1974), S. 431-434 
    ISSN: 1520-5118
    Source: ACS Legacy Archives
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Journal of agricultural and food chemistry 23 (1975), S. 1014-1015 
    ISSN: 1520-5118
    Source: ACS Legacy Archives
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1432-041X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary The synthesis of esterases was analysed in the ovariole of the milkweed bug using electrophoretic and histochemical methods. We found a total of 12 esterases from whole ovaries. Using the inhibitors p-hydroxymercuribenzoate, diisopropyl phosphorofluoridate and eserine, 3 of the bands were classed as acetylesterases, 7 carboxylesterases, and 2 arylesterases. No change in esterase patterns occurred during oogenesis. The esterase activity in the follicular epithelium was primarily arylesterase and carboxylesterase. A carboxylesterase was also identified from the central region of the follicle cell. The yolk cells contained mainly carboxylesterase. There was an apparent activation of enzyme activity following pre-treatment with eserine.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Journal of fish biology 27 (1985), S. 0 
    ISSN: 1095-8649
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Bullhead catfish, Ictalurus nebulosus, and rainbow trout, Salmo gairdneri, were subjected to two coal-derived substances to evaluate each material for potential carcinogenic activity. Substances tested included a solvent-refined coal heavy distillate and a sediment extract from an industrially polluted river in Ohio. Two subfractions, one containing the polycyclic aromatic hydrocarbons and the other containing the nitrogen heterocycles of each material were also tested. Following a 16-h exposure period, the gill and liver tissues were removed and examined by standard light and electron microscopy techniques. Hyperplasia of the gill tissue and some engorgement with blood of the secondary lamellae were observed with the light microscope. At the electron microscope level, hepatocyte mitochondria were swollen with a loss of cristae, and rough endoplasmic reticulum fragmented. Results suggest that most of the treatments studied induced pathological responses in fish. Of the two fish tested, the rainbow trout was the most sensitive indicator of environmental pollution.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Entomologia experimentalis et applicata 42 (1986), S. 101-107 
    ISSN: 1570-7458
    Keywords: Empoasca fabae ; soybean ; plant resistance ; physical defenses ; pubescence ; trichomes ; primary orientation ; fitness
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Résumé Les pulvilli d'Empoasca fabae paraissent fournir un mécanisme convenable pour la fixation des insectes aux surfaces lisses des feuilles. En nous basant sur la structure morphologique des prétarses et sur des observations directes, nous suggérons que l'orientation primaire sur des surfaces lisses est réalisée à partir de mouvements concernant surtout les pulvilli. La surface des cultivars pubescents de soja, rendue très accidentée par la présence des trichomes, empêche une fixation normale permettant l'alimentation et la ponte. Cet obstacle explique en partie la quasi immunité des sojas pubescents et, à l'inverse, la sensibilité des sojas glabres aux attaques d'E. fabae.
    Notes: Abstract The pulvilli of the potato leafhopper, Empoasca fabae (Harris), seem to provide a suitable mechanism for the attachment of the insect to smooth leaf surfaces. Based on morphological structure of the pretarsal and direct observations, we propose that primary orientation of the leafhoppers on smooth surfaces is achieved through a series of motions involving mainly the pulvilli. The highly irregular surface produced by the trichomes of pubescent soybean cultivars impedes normal attachment for feeding or oviposition. This impediment explains in part the near immunity of pubescent soybean and the converse susceptibility of glabrous soybean plants to the potato leafhopper.
    Type of Medium: Electronic Resource
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