Abstract: The invention concerns a purified polysaccharide consisting of glucose, galactose, glucuronic acid, galacturonic acid, and pyruvate mannose, combined in a repeat hexasaccharide unit of formula (1), said polysaccharide comprising a saccharide units of formula (1), n being not less than 1. Said polysaccharide is useful in particular in the agri-foodstuff sector.

Abstract: A centrifuge partition chromatography device for separating a liquid into at least two phases, comprising at least one flat ring (3a) that can be rotationally driven around its axis, disposed in a substantially vertical position. Said ring (3a) comprises a plurality of cells (7) whose dimensions are greater in a first direction than the dimensions in a second direction which is substantially perpendicular to the first, disposed side by side and distributed along the periphery of said ring (3a) in addition to being connected to each other in a series by inlet and outlet ducts (15) terminating in the opposite respective ends of each cells (7) enabling the circulation of liquid. The invention is characterized in that said ducts (15) are disposed in such a way that the liquid supply jet penetrates the cells (7) in a direction that includes at least one radial component relative to the axis of rotation of said ring (3a).

Abstract: The invention relates to a seismic acquisition device in a marine environment. The device comprises a Janus Helmholtz (12) transducer which is able to operate at a large depth of immersion and to sound waves in a wide frequency band, a calculator (13) to program at will the frequency band and the form of the sound waves emitted by the transducer, a power amplifier (14) that can control the transducer in order to provide the emitted sound waves with predetermined power levels, an impedance adapter (16) placed between the transducer (12) and the amplifier to enable wide band and power adaptation, and a receiver (18) to capture the seismic waves reflected by the different layers of the sea bed.

Abstract: A method for obtaining sulphated polysaccharides using the free radical depolymerization of a fucan from Phaeophyceae in the presence of a metal catalyst and of hydrogen peroxide is described. The method of the invention provides polysaccharide fractions with a molecular weight of 10,000 g/mol or less, with anticoagulant properties.

Abstract: The invention relates to sulphated polysaccharides obtained from fucuses extracted from pheophyceae. The molecular weight of these polysaccharides is greater than 5 and less than 40 Kda; their sulphur content is greater than that of the original fucus and they contain less than 0.15% of contaminant proteins. Applications as anticoagulant and anticomplementary agents.

Abstract: The invention relates to processes for intensive shrimp breeding, in tanks here a small proportion of the water is renewed, with a view to obtaining the growth of post-larvae more than 12-days old. Before placing the post-larvae in the tank, the water is prepared by filling up the tank progressively and adding daily to that water an artificial food containing nitrobenous organic products until flocs, formed of heterotroph and nitrifying bacteria and phytoplanktons, are obtined, serving as a complement of food to the shrimps which are fed with artificial food.