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  • sugarbeet  (2)
  • Cat mutants  (1)
  • Springer  (3)
  • American Meteorological Society
  • Blackwell Publishing Ltd
  • 1980-1984  (3)
  • 1935-1939
  • 1983  (3)
Collection
Keywords
Publisher
  • Springer  (3)
  • American Meteorological Society
  • Blackwell Publishing Ltd
Years
  • 1980-1984  (3)
  • 1935-1939
Year
  • 1983  (3)
  • 1
    Electronic Resource
    Electronic Resource
    Gene frequencies in a population of feral cats in Portsmouth naval Dockyard (1983)
    Springer
    Theoretical and applied genetics 64 (1983), S. 197-204 
    Details
    ISSN: 1432-2242
    Keywords: Population genetics ; Cat ecology ; Cat mutants ; Feral cats ; Ecological genetics
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary The free-living or feral cats of Portsmouth Dockyard were examined for the frequency of six mutant colour and coat genes. With the exception of one mutant, they were found to differ from the values to be expected for Southern England cat populations. The differences observed may have resulted from selection in the isolated environment (to produce a unique gene profile in terms of frequencies) or from a founder effect. If the latter, the observed frequencies could represent a relict population reflecting the frequencies of the town of Portsmouth before the dockyard was totally enclosed by a high wall. Some evidence of selection related to coat colour was found.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00303764
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Isolation of intact chloroplasts with high CO2 fixation capacity from sugarbeet leaves containing calcium oxalate (1983)
    Springer
    Photosynthesis research 4 (1983), S. 281-287 
    Details
    ISSN: 1573-5079
    Keywords: Beta vulgaris ; calcium oxalate ; CO2 fixation ; isolated chloroplasts ; sugarbeet
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Intact chloroplasts were isolated from sugarbeet leaves by the mechanical disruption technique normally used for spinach. The chloroplast pellet contained a ring of white irregularly shaped crystals which were identified as calcium oxalate. The chloroplasts were greater than 90% intact yet good rates of CO2 fixation were only obtained when inorganic pyrophosphate or 3-phosphoglycerate were added to the assay medium. Chloroplasts free of calcium oxalate were prepared by purification on a three step Percoll gradient. These purified chloroplasts were highly intact and showed high rates of CO2 fixation without adding inorganic pyrophosphate or 3-phosphoglycerate. With optimal assay conditions (0.2 mM orthophosphate and pH 8.0) rates of 110–130 μ mole per milligram chlorophyll per hour were routinely obtained. It is concluded that intact chloroplasts capable of high rates of CO2 fixation can be prepared from sugarbeet leaves using a simple three step Percoll gradient.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00052132
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Isolation of intact chloroplasts with high CO2 fixation capacity from sugarbeet leaves containing calcium oxalate (1983)
    Springer
    Photosynthesis research 4 (1983), S. 281-287 
    Details
    ISSN: 1573-5079
    Keywords: Beta vulgaris ; caicium oxalate ; CO2 fixation ; isolated chloroplasts ; sugarbeet
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Intact chloroplasts were isolated from sugarbeet leaves by the mechanical disruption technique normally used for spinach. The chloroplast pellet contained a ring of white irregularly shaped crystals which were identified as calcium oxalate. The chloroplasts were greater than 90% intact yet good rates of CO2 fixation were only obtained when inorganic pyrophosphate or 3-phosphoglycerate were added to the assay medium. Chloroplasts free of calcium oxalate were prepared by purification on a three step Percoll gradient. These purified chloroplasts were highly intact and showed high rates of CO2 fixation without adding inorganic pyrophosphate or 3-phosphoglycerate. With optimal assay conditions (0.2 mM orthophosphate and pH 8.0) rates of 110–130 μ mole per milligram chlorophyll per hour were routinely obtained. It is concluded that intact chloroplasts capable of high rates of CO2 fixation can be prepared from sugarbeet leaves using a simple three step Percoll gradient.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00041824
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    Paper (German National Licenses)
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