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  • 1
    Electronic Resource
    Electronic Resource
    Preliminary observations on nitrogen transport during summer in a small spring-fed Ontario stream (1976)
    Springer
    Hydrobiologia 49 (1976), S. 59-63 
    Details
    ISSN: 1573-5117
    Keywords: Streams ; Nitrogen ; Nutrients ; Denitrification
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Nitrogen transport in a 2 km-long, spring-fed stream was studied during the summer months by analyzing weekly water samples from four stations. The water at the spring had a consistently high level of nitrate-N ranging from about 7 mg/l in late spring to about 3 mg/l in early fall. However, over the length of the stream, 60% (about 97 kg) of the incoming nitrate-N is lost from the water during the summer period. The loss, which does not appear to be attributable to the uptake by aquatic macrophytes or to immobilization, is thought to result from denitrification.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00016169
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    A simple system for the Collection of Leaf-Derived Faecal Pellets of Aquatic Invertebrates (1979)
    Springer
    Hydrobiologia 64 (1979), S. 5-8 
    Details
    ISSN: 1573-5117
    Keywords: Faecal Pellets ; Freshwater Invertebrates
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Animals and food (leaves) are confined at a desired temperature in a feeding chamber in the upper portion of the water column of a collector system. Egested material collects in water at 0°C also eliminates coprophagy and physical damage to the pellets.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00015448
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    Paper (German National Licenses)
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  • 3
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    Statistical considerations in design of spacelab experiments (1978)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: After making an analysis of experimental error sources, statistical models were developed for the design and analysis of potential Space Shuttle experiments. Guidelines for statistical significance and/or confidence limits of expected results were also included. The models were then tested out on the following proposed Space Shuttle biomedical experiments: (1) bone density by computer tomography; (2) basal metabolism; and (3) total body water. Analysis of those results and therefore of the models proved inconclusive due to the lack of previous research data and statistical values. However, the models were seen as possible guides to making some predictions and decisions.
    Keywords: ASTRONAUTICS (GENERAL)
    Type: NASA-CR-160197 , TIR-741-LSP-8012
    Format: application/pdf
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    NASA TECHNICAL REPORTS
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