THE nature of the cell wall constituents of the red and brown algae has been the subject of study in this laboratory for some time past [Haas and Hill, 1921; Haas, 1921; Russell-Wells, 1922; Haas and Russell-Wells, 1923, 1929]. The present investigation, which is concerned primarily with Laminaria spp., was undertaken with the object of throwing some light on the mode of occurrence within the p...

A large number of studies have suggested that polysaccharides, such as fucoidan and laminarin, in various seaweeds have significant biological properties. A different distribution of molecular weights is a prominent sign of many polysaccharides. Therefore, a simple, fast and reliable high-performance size-exclusion chromatography (HPSEC) method was proposed to separate fucoidan and laminarin fr...

The spatial distribution of kelp (Laminaria hyperborea) and sea urchins (Strongylocentrotus droebachiensis) in the NE Atlantic are highly related to physical factors and to temporal changes in temperature. On a large scale, we identified borders for kelp recovery and sea urchin persistence along the north-south gradient. Sea urchin persistence was also related to the coast-ocean gradient. The s...

In Normandy, the marine macroalgae become a large problem when retreat of tide leaves quantities stranded seaweed on coast. These seaweeds can be toxic during their degradation in addition to creating odor problems. Consequently, elimination has major and recovery an emergency. this work, we proposed use building construction at scale. We investigated particular performance insulated walls base...

The potential of supercritical water gasification (SCWG) of macroalgae for hydrogen and methane production has been investigated in view of the growing interest in a future macroalgae biorefinery concept. The compositions of syngas from the catalytic SCWG of Laminaria hyperborea under varying parameters including catalyst loading, feed concentration, hold time and temperature have been investig...

Alginates are natural polysaccharides that are extracted from brown seaweeds and widely used for their rheological properties. The main step in the extraction protocol used in the alginate industry is that of alkaline extraction. A batch process is used for this step, which is time-, water-, and reactantconsuming. The possibility of extracting by reactive extrusion was investigated. The reactiv...

A test deployment of a time-lapse camera lander in the deep Oslofjord (431 m) was used to obtain initial information on the response of benthic fauna to macroalgal debris. Three macroalgal species were used on the lander baited plate: Fucus serratus, Saccharina latissima and Laminaria hyperborea and observed during 41.5 hours. The deep-water shrimp Pandalus borealis were attracted to the macroa...