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  • Articles: DFG German National Licenses  (2)
  • Mean cell density  (1)
  • Pineapple  (1)
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  • Articles: DFG German National Licenses  (2)
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Years
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Archives of microbiology 147 (1987), S. 68-72 
    ISSN: 1432-072X
    Keywords: Differential sedimentation ; Synchronous cultures ; Bacillus subtilis ; Mean cell density
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract A simple rapid method for preparing synchronous cultures of Bacillus subtilis has been used to investigate changes in density during the cell cycle. Asynchronous cells separated on a stepped Percoll density gradient had a mean cell density of 1.117 g ml-1±0.004. Samples from a synchronous culture exhibited variation (ca. 1.5%) in mean cell density which was greatest at the onset of cell division. An asynchronous control culture showed little variation in density. These results are discussed in relation to previous work on Escherichia coli.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1573-9104
    Keywords: Ascorbic acid ; Pineapple ; Processing and storage
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Ascorbic acid contents of the juice of four different pineapples species grown in the Rivers State of Nigeria were determined before and after storage of whole pineapple and processing and storage of the juice for two months. Ascorbic acid of the fresh juice ranged from 22.5 mg to 33.5 mg/100 g sample. After storage at room temperature (30–32 °C) of whole pineapple for two weeks, ascorbic acid was reduced to between 59 and 65 percent of the fresh juice. Processing the juice by pasteurisation reduced the ascorbic acid to between 28 and 46 percent while storage in plastic bottles for two months further reduced the ascorbic acid content to between 10 and 21 percent.
    Type of Medium: Electronic Resource
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