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The chemical composition of shrimp shells from the deep-water shrimp (Pandalus borealis) obtained from a local factory in northern Norway that were harvested from January to December (2000) in the Barents Sea was investigated. The average dry matter content of the samples of shrimp shells was 22 ± 2%, with no significant seasonal variation. The pro...
The aim of this study was to adapt the techniques of rope culture to the cultivation of the edible seaweed Palmaria palmata on the northern Spanish coast. Vertical rope rafts were installed in two locations. Fronds were attached to 4-mm polyethylene ropes that were suspended from a steel frame secured in position using weights and buoys. In the fir...
We examined the chemical composition of Palmaria palmata collected monthly from April 1998 to September 1999 in the Trondheimsfjord, Norway. Clear seasonal variations in ash (15-27% of dw), proteins (14-30% of dw) and the low molecular weight carbohydrate, floridoside (3.3 to 25% of dw) were observed. A new and simple method for quantification of f...
High numbers of protoplasts were isolated from Laminaria digitata. Photosynthetic ability measured by DCMU-enhanced in vivo fluorescence was used as a viability criterium to assess the quality of protoplast isolation. A new extraction method was developed in order to achieve membrane disruption and a complete extraction. Seasonal variation in prote...
Protoplasts have been prepared from sporophytes of Laminaria digitata and Laminaria saccharina. Different culture media have been tested in order to achieve cell wall regeneration. The most appropriate culture medium for Laminaria digitata protoplasts was found to be an ionic medium with glucose as extra osmoticum. For Laminaria saccharina protopla...
Biosynthesis of alginate in algae may be studied by following the cell wall regeneration of brown seaweed protoplasts in culture. The enzyme mannuronan C-5 epimerase will control the composition of the alginate being synthetized.
Freshly isolated protoplasts from the thallus of young Laminaria digitata plants showed only low expression of this enzy...
