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  • Electronic Resource  (2)
  • 127Xe-Radionuclide ventriculography  (1)
  • Betaine Ectoine  (1)
  • 1
    Electronic Resource
    Electronic Resource
    The role of trehalose as a substitute for nitrogen-containing compatible solutes (Ectothiorhodospira halochloris) (1990)
    Springer
    Archives of microbiology 153 (1990), S. 607-613 
    Details
    ISSN: 1432-072X
    Keywords: Anaerobic phototrophic bacteria ; Halophilic eubacteria ; Osmoadaptation ; Betaine Ectoine ; Trehalose ; Compatible solutes ; Ectothiorhodospira halochloris
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The halophilic phototrophic bacterium Ectothiorhodospira halochloris is able to synthesize both nitrogen-containing (betaine, ectoine) and nitrogen-free (trehalose) compatible solutes. In the absence of external ammonium and under nitrogen-limited growth conditions ectoine was metabolized and trehalose partly replaced betaine. The cytoplasmic trehalose concentration did not exceeded 0.5 mol/kg water (approx. 30% of total compatible solutes). A decreasing content of betaine in cells growing under nitrogen limitation is a result of decreased biosynthesis. Apparently, the betaine pool cannot be used as a nitrogen source, not even in a situation of total nitrogen depletion.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00245273
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    A new method of imaging the right ventricle using peripheral vein infusion of xenon 127 (1987)
    Springer
    European journal of nuclear medicine 12 (1987), S. 617-619 
    Details
    ISSN: 1619-7089
    Keywords: 127Xe-Radionuclide ventriculography ; Right ventricular function
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract We report the development of a new method for obtaining right ventriculograms using the peripheral intravenous infusion of a new tracer, 127Xe dissolved in saline. This tracer has a half life of 36 days, emits 172 keV and 203 keV photons, and is completely cleared by the lungs during pulmonary transit. The right ventricle can therefore be imaged free from interfering activity in the systemic circulation. The technique was used in 11 normal subjects and the results compared with those obtained using first pass and gated equilibrium blood pool angiography with 99mTc. Excellent images of the right ventricle were obtained and the tricuspid and pulmonary valve planes could be easily identified. This imaging technique has significant advantages over existing methods for the noninvasive assessment of right ventricular function.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00284538
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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