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  • 1995-1999  (2)
  • 1940-1944
  • 1930-1934
  • 1920-1924
  • 3-D volume measurements  (1)
  • Antennaria microphylla Rydb  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Sequential Imaging and Volumetric Analysis of an Intracerebral C6 Glioma by Means of a Clinical MRI System (1999)
    Springer
    Journal of neuro-oncology 43 (1999), S. 11-17 
    Details
    ISSN: 1573-7373
    Keywords: MRI ; wrist coil ; 3-D volume measurements ; C6 glioma ; MRI mouse brain
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract In this study, using high resolution coils; implanted growing rat brain tumors were imaged sequentially with 3-D measurements generated by means of a clinical magnetic resonance imaging system (CMRI) and commercially available wrist coil. Ten female Sprague–Dawley rats were used, eight were implanted with C6 rat glioma cells and two served as controls. The images that were used for the three-dimensional (3-D) measurements were obtained from T1 weighted post contrast sequences. A commercially available computer work station with 3-D image analysis software was used to generate the tumor volumes. In addition to the rat studies a mouse was included to see if the resolution would be adequate for imaging very small brains. Six rats had brain tumor growth after transplantation and two rats did not have any tumor growth, however, their images were similar to the controls animals. Tumor volumes varied widely among the implanted rats. The number of implanted tumor cells had no direct relationship to developing tumor volumes. This study demonstrates that high resolution images of a rat brain tumor can be obtained from a CMRI system using a commercially available wrist coil which is capable of imaging two rats at the same time or even a mouse brain. A commercially available computer work station was able to generate the tumor volumes. The ability to image brain tumor and generate volume measurements over time has potential for animal research.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1006285800794
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    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Mechanisms of Hydroquinone-Induced Growth Reduction in Leafy Spurge (1999)
    Springer
    Journal of chemical ecology 25 (1999), S. 1611-1621 
    Details
    ISSN: 1573-1561
    Keywords: Hydroquinone ; allelopathy ; plant water balance ; photosynthesis ; chlorophyll fluorescence ; 13C isotopes ; leafy spurge ; Euphorbia esula ; small everlasting ; Antennaria microphylla Rydb
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Field observations indicate leafy spurge (Euphorbia esula) is inhibited by the presence of Antennaria microphylla. Hydroquinone (HQ), one of several compounds isolated from A. microphylla has been shown to inhibit leafy spurge seed germination, root elongation, and callus culture growth. The present study was designed to analyze the effects of HQ on water relations and photosynthesis of leafy spurge. Plants grown in 0.25 mM HQ had consistently higher leaf diffusive resistance and lower transpiration rates than control plants (P 〈 0.05). Chlorophyll fluorescence was significantly lower than controls (P 〈 0.05) towards the end of the treatment period. At the end of the treatment, tissue from 0.25 mM HQ plants had higher levels of 13C, indicating there had been a sustained interference with stomatal function. These data suggest that a disruption of the plant water balance is one mechanism of leafy spurge inhibition by A. microphylla.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1020892917434
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
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