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  • 1
    Electronic Resource
    Electronic Resource
    Scanning probe microscopy for testing ultrafast electronic devices (1996)
    Springer
    Optical and quantum electronics 28 (1996), S. 819-841 
    Details
    ISSN: 1572-817X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology , Physics
    Notes: Abstract Scanning force microscopy has been developed as a practical, non-contact probing technique for measuring voltage waveforms at internal nodes of integrated devices and circuits. Dynamic voltage contrast is achieved with high spatial and temporal resolution. The factors contributing to system bandwidth, voltage sensitivity and spatial resolution are discussed. Time-domain and frequency-domain measurements of silicon and gallium arsenide circuits are presented.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00820151
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Comparisons of diverse plant species reveal that only grasses show drastically reduced levels of ubiquitin monomer in mature pollen (1995)
    Springer
    Sexual plant reproduction 8 (1995), S. 326-332 
    Details
    ISSN: 1432-2145
    Keywords: Ubiquitin ; Tomato ; Maize ; Heat shock proteins ; Protein degradation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Ubiquitin is a ubiquitous protein involved in targeting proteins for degradation. Maize pollen was previously reported (Callis and Bedinger 1994) to show extremely low levels of ubiquitin monomer, and developmental significance was attributed to this surprising feature of maize pollen. However, we had previously shown (Muschietti et al. 1994) that tomato pollen had high levels of ubiquitin monomer. Here we show that pollen from most plant families has high levels of ubiquitin monomer. Most grasses tested show reduced levels of ubiquitin monomer, but some maize inbred lines have higher levels of ubiquitin monomer than other inbreds. There was no correlation between the level of ubiquitin monomer and either the monocotyledonous or tri-cellular condition of grass pollen or the dehydrated condition of mature pollen. Since many aspects of pollen development (i.e., wall formation, microspore mitosis, synthesis and storage of mRNAs and proteins, carbohydrates and lipids, dehydration at maturity) are stereotypical among all plant families, the reduced level of ubiquitin monomer in pollen of many grasses cannot be crucial for any feature of normal pollen development.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00243199
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Recombinant chromosomes of advanced backcross plants between Allium cepa L. and A. fistulosum L. revealed by in situ hybridization (2000)
    Springer
    Theoretical and applied genetics 100 (2000), S. 1190-1196 
    Details
    ISSN: 1432-2242
    Keywords: Key words Fluorescence in situ hybridization ; Genomic in situ hybridization ; Interspecific introgression ; Japanese bunching onion ; Onion
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract  Cytological analysis of (Allium cepa L.×Allium fistulosum L.)×A. cepa L. F1BC3 plants revealed most plants were diploid with 16 chromosomes. Karyotypes of these plants showed recombinant chromosomes. Fluorescence and genomic in situ hybridization patterns of interspecific F1 hybrid and F1BC3 plants revealed A. fistulosum chromosomes or chromosomal segments. A highly repetitive 376-bp DNA sequence and genomic DNA of A. fistulosum revealed similar telomeric hybridization sites when hybridized onto A. fistulosum chromosomes. Cytogenetic evidence showed that A. fistulosum DNA has recombined into the A. cepa genome.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s001220051423
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  • 4
    Electronic Resource
    Electronic Resource
    Bulb-type onion introgressants posessing Allium fistulosum L. genes recovered from interspecific hybrid backcrosses between A. cepa L. and A. fistulosum L. (2000)
    Springer
    Theoretical and applied genetics 100 (2000), S. 528-534 
    Details
    ISSN: 1432-2242
    Keywords: Key words Introgression ; Interspecific hybridization ; Isozymes ; Japanese bunching onion ; Male sterility
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract  Allium fistulosum possesses a number of traits which would be desirable in A. cepa. Thus far, no commercial A. cepa cultivars have been released which harbor Allium fistulosum traits. F1BC3 populations were generated for this study by backcrossing A. cepa to A. cepa×A. fistulosum hybrids. The F1BC3 plants were evaluated for plant morphology, floral characters, male- sterile cytoplasm, soluble solids and pungency, and isozymes. Overall growth habit and floral characters of the F1BC3 plants were much like A. cepa. We report here the recovery of recombinant, bulbing, and fertile A. cepa-type onions that exhibit A. fistulosum isozyme alleles and morphological markers. Recombination between A. cepa and A. fistulosum genomes was achieved using the introgression strategy of backcrossing A. fistulosum into A. cepa, thereby ameliorating the nuclear cytoplasmic barriers that occurred in previous less successful introgression attempts when plants were not in A. cepa cytoplasm. We believe this report to be the first demonstration of onion introgressants that are like A. cepa in appearance, are male- and female-fertile, and possess A. fistulosum genes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s001220050069
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    Paper (German National Licenses)
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