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  • Analytical Chemistry and Spectroscopy  (2)
  • Auxotrophs  (1)
  • Chromosome 8  (1)
  • 1
    Digitale Medien
    Digitale Medien
    The rib gap anomaly in partial or mosaic trisomy 8 (1988)
    Springer
    Skeletal radiology 17 (1988), S. 251-254 
    Details
    ISSN: 1432-2161
    Schlagwort(e): Rib gaps ; Skeletal anomalies ; Chromosome 8 ; Mosaicism ; Partial trisomy
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract Gaps in the first ribs were observed in two children, one with partial and the other with mosaic trisomy for chromosome 8. The sign may be considered in conjunction with other features as a relative indication for chromosomal studies.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00401806
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    The development of a negative selection system for the isolation of plant temperature-sensitive auxin auxotrophs (1988)
    Springer
    Theoretical and applied genetics 75 (1988), S. 869-874 
    Details
    ISSN: 1432-2242
    Schlagwort(e): Auxin ; Auxotrophs ; BUdR ; Enrichment ; Temperature sensitivity
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Summary A protocol has been developed for the negative selection of plant auxotrophs using the nucleoside analogues BUdR and FUdR. The protocol was optimised using nitrogen-starved protoplast-derived cells of Nicotiana plumbaginifolia to simulate auxotrophy. The present results represent a significant improvement over previous reports in that: 1) The background of colonies escaping BUdR/FUdR kill is low and reproducible. 2) The protocol was improved to the point where background survival was 0.03% for non-starved cultures and 0.09% for auxin-starved cultures. 3) It was shown that UV irradiation decreases BUdR sensitivity of dividing cells and that this is overcome by increased exposure to BUdR. 4) Application of the method to auxin-starved haploid protoplast-derived cell suspensions resulted, for the first time, in the selection of temperature-sensitive (ts) auxin auxotrophs. 5) It could be demonstrated, for the first time, that the method in practice enriches for auxotrophs, in this case by a factor of 10 for auxin auxotrophs and at least 60 for ts auxin auxotrophs.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00258047
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 3
    Digitale Medien
    Digitale Medien
    A deceleration lens system for hybrid mass spectrometers (1989)
    New York, NY : Wiley-Blackwell
    Rapid Communications in Mass Spectrometry 3 (1989), S. 417-419 
    Details
    ISSN: 0951-4198
    Schlagwort(e): Chemistry ; Analytical Chemistry and Spectroscopy
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Physik
    Notizen: A simple and efficient deceleration system for the coupling of magnetic and electric sector instruments to quadrupole analyzers is described. The trasnsmission efficiency of the system appears to be at least 80% or better as the ions are decelerated from 3 ke V to 30 eV (a deceleration factor of 1:100). No mass discrimination was observed in the range up to mass 1000.
    Zusätzliches Material: 6 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/rcm.1290031203
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 4
    Digitale Medien
    Digitale Medien
    A novel hybrid mass spectrometer (1989)
    New York, NY : Wiley-Blackwell
    Rapid Communications in Mass Spectrometry 3 (1989), S. 62-66 
    Details
    ISSN: 0951-4198
    Schlagwort(e): Chemistry ; Analytical Chemistry and Spectroscopy
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Physik
    Notizen: A new hybrid mass spectrometer of BEQiQu geometry (B, magnetic sector; E, Electric sector; Qi, quistor; Qu, quadrupole mass filter) is described. The high resolution stage (BE) is coupled to a quistor via a series of deceleration lenses, and this is followed by a mass-analysing quadrupole. This configuration enables the storing of ions, investigation of their gas-phase chemistry and the subsequent identification of the resulting fragment or product ions.
    Zusätzliches Material: 12 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/rcm.1290030303
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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