A microcalorimetric perfusion vessel used for measurements of total activity in sediment samples |
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| Authors: | Kersti Gustafsson Lena Gustafsson |
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| Institution: | 1. National Defence Research Institute, Division of Microbiology, S-901 82 Umeå, Sweden;2. Department of Marine Microbiology, Botanicl Institute, University of Göteborg, Carl Skotsbergs Gata 22, S-413 19 Göteborg, Sweden |
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| Abstract: | A multichannel microcalorimeter of the heat-conduction type was equipped with a prototype of a perfusion vessel and was used to measure the total activity during long time periods in natural, aquatic sedimnet samples from aerobic environments. The effect of addition of organic substances, a pollutant and bacteria was studied. The water phase of the sediment phase of the sediment samples was aerated with humidified air and stirred uring measurements. The total activity of the actual sediment was also measured in an ampoule system, for comparison. Aeration of the samples led to an increased heat production rate. |
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| Keywords: | Microcalometric perfusion vessel Multichannel microcalorimeter Sediments samples Total activity |
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