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  • 1
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 67 (1996), S. 641-648 
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: Time-resolved electron-beam diagnostics have been developed for use with free-electron lasers (FELs) and associated electron sources, based on the techniques of secondary electron emission and optical transition radiation (OTR). The 32-channel OTR detector forms part of a high-resolution (0.18%) electron spectrometer with a time resolution of 50 ns. Variable-magnification optics allow the spectrometer to view single-macropulse spectra with widths in the range of 0.2%–7%; wider spectra are taken with several momentum settings. Design criteria for the spectrometer are presented, and experience of operating with the diagnostics over a range of FEL physics experiments is summarized. The spectrometer is used, in conjunction with optical diagnostics, in studies at FELIX of efficiency enhancement, pulse chirping, and stepped-undulator operation. © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
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  • 2
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    Unknown
    Edmonton, Alta. : Periodicals Archive Online (PAO)
    Canadian journal of philosophy. 13:4 (1983:Dec.) 551 
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  • 3
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    Unknown
    Edmonton, Alta. : Periodicals Archive Online (PAO)
    Canadian journal of philosophy. 13:4 (1983:Dec.) 575 
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  • 4
    Electronic Resource
    Electronic Resource
    Cambridge : Cambridge University Press
    Religious studies 8 (1972), S. 85-88 
    ISSN: 0034-4125
    Source: Cambridge Journals Digital Archives
    Topics: Theology and Religious Studies
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    World journal of surgery 3 (1979), S. 43-52 
    ISSN: 1432-2323
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Résumé Plusieurs éléments du pied ont un pédicule vasculaire de calibre suffisant pour permettre une transplantation dans un but de reconstruction. Les orteils, les commissures interdigitales avec leur innervation, la peau dorsale peuvent ainsi être utilisées avec des indications spécifiques, et avec une morbidité minime pour le pied. Au cours des 5 dernières années, nous avons réalisé 44 transplantations avec micro-anastomoses vasculaires d'orteils, de lambeaux cutanés, de muscles, d'os et de tendons pour reconstruire la main, la face, les régions du cou. Deux transplants seulement ont échoué, tous 2 au cours de la première année. Avec ce type de transplant, on obtient, dans la majorité des cas, un meilleur résultat fonctionnel et esthétique. Certains transplants étaient formés de plusieurs tissus: lambeaux cutanés libres avec leur pédicule vasculaire et nerveux, lambeau cutané dorsal avec le deuxième métatarsien, par exemple. Cette série d'observations démontre que le pied est un excellent site donneur pour la chirurgie reconstructive.
    Notes: Abstract A common vasculature of large dimensions supplies many segments of the foot that are suitable for distant transfer for reconstructive purposes. Toes, innervated web spaces, and the dorsal skin of the foot each have unique qualities and indications as segments for transfer at the expense of minimal morbidity to the foot. Forty-four microvascular transfers of toes, flaps, muscles, bones, and tendons have been carried out for reconstructive purposes in the hand, face, and neck over a 5-year period. Only 2 losses have occurred, both in the first year. A significant upgrading of function and reduction of disfigurement has followed the majority of these procedures. Sometimes the tissues have been used in combination, as in neurovascular free flaps and combined dorsum of the foot flap and second metatarsal. This series of cases demonstrates the unique capacity of the foot as a donor site in reconstructive surgery.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    World journal of microbiology and biotechnology 9 (1993), S. 583-586 
    ISSN: 1573-0972
    Keywords: Cell-free extracts ; plasmids ; recombination ; Saccharomyces cerevisiae ; topo-isomerase mutants
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Abstract Cell-free extracts of the yeast Saccharomyces cerevisiae can be used to catalyse the recombination of bacterial plasmids in vitro. Recombination between homologous plasmids containing different mutations in the gene encoding tetracycline resistance is detectable by the appearance of tetracycline-resistance following transformation of the recombinant plasmid DNA into Escherichia coli DH5. This in vitro recombination system was used to determine the involvement of eukaryotic topo-isomerases in genetic recombination. Cell-free extracts prepared from a temperature-sensitive topo-isomerase II mutant (top2-1) of S. cerevisiae yielded tetracycline-resistant recombinants, when the recombination assays were performed at both a non-restrictive temperature (30°C) and the restrictive temperature (37°C). This result was obtained whether or not ATP was present in the recombination buffer. Extracts from a non-conditional topo-isomerase I mutant (top1-1) of S. cerevisiae yielded tetracycline-resistant recombinants, as did a temperature-sensitive double mutant (top2-1/top1-8) at the restrictive temperature. The results of this study indicate that neither topo-isomerase I nor topo-isomerase II was involved in the recombinational activity examined.
    Type of Medium: Electronic Resource
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