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  • 1
    Electronic Resource
    Electronic Resource
    Energy analysis on fracture of ferroelectric ceramics (2000)
    Springer
    International journal of fracture 100 (2000), S. 401-408 
    Details
    ISSN: 1573-2673
    Keywords: Ferroelectric ceramic ; fracture ; energy criterion
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract In the spirit of the Griffith's theory on mechanical fracture, a fracture criterion of ferroelectric ceramics in terms of energy analysis is proposed in this paper. The energy criterion is compared with the local energy release rate proposed by Gao et al. and the strain energy release rate of Park and Sun. In addition, the criterion can be used to explain why a positive electric field promotes cracking while a negative electric field can retard crack propagation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1018740911313
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    A spindle pole body-associated protein, SNAD, affects septation and conidiation in Aspergillus nidulans (2000)
    Springer
    Molecular genetics and genomics 263 (2000), S. 375-387 
    Details
    ISSN: 1617-4623
    Keywords: Key words Cytokinesis ; Cytoplasmic dynein ; Septation ; Spindle pole body ; Aspergillus
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The nudA1 mutation in the cytoplasmic dynein heavy chain gene inhibits nuclear migration, colony growth and asexual sporulation (conidiation) in the filamentous fungus Aspergillus nidulans. It also alters the location of the first cell division event (septation) and prevents nucleation of tip cells. We showed previously that a suppressor of nudA1, snaD290, partially reversed the nuclear migration defect and partially restored colony growth. We have now demonstrated that the snaD290 mutation also delays septation and restores the septum to its normal position, allowing tip cells to be nucleated. Although snaD290 does not affect nuclear migration or vegetative hyphal growth, it almost completely inhibits conidiation. We propose that the SNAD protein participates in septation, and is essential for asexual spore formation. SnaD encodes a novel 76-kDa coiled-coil protein (SNAD) that is located at the spindle pole body throughout the cell cycle. Therefore, our results suggest that proteins at the spindle pole body are likely to be involved in temporal regulation of septation in A. nidulans.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s004380051181
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    Paper (German National Licenses)
    Fulltext
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