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  • 1
    Electronic Resource
    Electronic Resource
    Differentiated biological activity of Vero cytotoxins (VT) released by human and porcine Escherichia coli strains (1983)
    Oxford, UK : Blackwell Publishing Ltd
    FEMS microbiology letters 20 (1983), S. 0 
    Details
    ISSN: 1574-6968
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Abstract We have investigated the biological activity in the filtered culture supernatants from 9 VT-producing Escherichia coli strains. The filtrates from 4 strains (3 of human and one of bovine origin), were cytotoxic on Vero and HeLa cells, and caused death in intraperitoneally injected adult mice. The 5 strains of porcine origin showed cytotoxic activity on Vero and Y-1 cells but not on HeLa cells. Filtrates of these latter strains were not lethal for adult mice. VT-cytotoxins produced by all strains were inactive in the infant mouse test and the filtrates from 7 of 8 VT-producing strains assayed in rabbit ileal loops caused fluid accumulation in at least one of the 3 rabbits employed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1574-6968.1983.tb00110.x
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  • 2
    Electronic Resource
    Electronic Resource
    Experiments with isoproturon for the control of weeds in winter cereal crops (1983)
    Oxford, UK : Blackwell Publishing Ltd
    Weed research 23 (1983), S. 0 
    Details
    ISSN: 1365-3180
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Isoproturon controlled Phalaris spp., Lolium spp., Avena sterilis L. and Papaver rhoeas L. in winter cereal crops, the dosages applied being in accordance with the different texture of the soils on which the herbicide was tested in the province of Toledo (Spain).The competitive effects of the weeds, particularly Avena sterilis were ascertained on a range of cereal parameters, not only those influencing yield, but also the grain weight/straw weight ratio.The influence of climatic and edaphic conditions on the efficiency of the herbicide was also investigated.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-3180.1983.tb00518.x
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  • 3
    Electronic Resource
    Electronic Resource
    Scanning Electron Microscopy of Attached Trophozoites of Pathogenic Entamoeba histolytica (1983)
    Oxford, UK : Blackwell Publishing Ltd
    The @journal of eukaryotic microbiology 30 (1983), S. 0 
    Details
    ISSN: 1550-7408
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: The surface morphology of Entamoeba histolytica trophozoites of HM 1:IMSS (axenic and monoxenic) and HK9 (axenic) strains cultured on plastic and MDCK cell substrates was examined using scanning electron microscopy (SEM). The conditions for processing trophozoites were determined by comparing the SEM observations with the morphology of living amebas examined by light microscopy. The most frequent surface differentiations in all the amebas observed with SEM were lobopodia. Round cytoplasmic projections were found in approximately half of the axenic amebas. Endocytic stomas and filopodia were more common in monoxenic cultures while the uroid was found in only 2–8% of all examined amebas. The basal surfaces of the trophozoites, involved in both attachment and cytolysis, showed no unusual features, except for the presence of a small number of short filopodia at the outer edge. No differences were found in the morphology of amebas grown on artificial and natural substrates. These observations demonstrate that there are significant quantitative differences in the surface morphology of cultured trophozoites of different strains of E. histolytica and that association with bacteria produces an increase in the relative number of surface specializations of the parasite.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1550-7408.1983.tb05345.x
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