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  • 1
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Journal of agricultural and food chemistry 41 (1993), S. 469-473 
    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
    Library Location Call Number Volume/Issue/Year Availability
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Artificial intelligence review 12 (1998), S. 137-162 
    ISSN: 1573-7462
    Keywords: cell migration ; computer vision ; multi-agent ; wound healing
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science
    Notes: Abstract This paper presents a multiagent system for studying in vitro cell motion. A typical application on the wound closure process is presented to illustrate the possibilities of the system, where different image sequences will be treated. The motion issue involves three aspects: image segmentation, object tracking and motion analysis. The current system version focuses mainly on the image segmentation aspect. A general agent model has been designed, which will be further expanded to include tracking and motion analysis behaviors as well. The agents integrate three basic behaviors: perception, interaction and reproduction. The perception evaluates pixels upon static and motion-based criteria. The interaction behavior allows two agents to merge or to negotiate parts of regions. The negotiation can be seen as a segmentation refinement process done by the agents. Finally, the reproduction behavior defines an exploration strategy of the images. Agents can start other agents around them, or they can duplicate themselves in the next frame. The frames are processed in pipeline, where previous information is used to treat the current frame. One unique agent model exist. Agents are specialized on execution time according to their goals. The results, coming from an existing prototype, show different types of cell behavior during cell migration, based on cell nuclei analysis.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1573-5028
    Keywords: potato spindle tuber viroid ; PSTVd ; viroid ; RNA ; sequence analysis ; viroid isolates ; viroid strains
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The sequence analysis of five new field isolates of potato spindle tuber viroid (PSTVd) of different virulence revealed that the lengthof their RNA chain is not strictly conserved to 359 nucleotides (nts), as one could have inferred from the previously sequenced PSTVd strains. It was now found that the chain length is strain-specific like in the case of practically all other viroids, and that it may vary, so far, between 356 and 360 nts. Taking our previously sequenced and least virulent mild strain PSTVd KF6-M as standard, the new mild strains PSTVd WA-M and PSTVd F-M differ from it by one or two nts. The new intermediate-severe strains PSTVd F-IS and PSTV-F 88-IS differ from the standard mild strain by eight and nine nts, respectively, whereas the new severe-lethal strain PSTVd F-SL differes in seven nts. Most of these mutations are located within the virulence-modulating (VM) region and within the variable region (VR), and only in two strains a single mutation is found in the right terminal domain.
    Type of Medium: Electronic Resource
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