Abstract: A composition comprising at least 50 mg/g of one or several omega-3 type fatty acid(s), at least 10 mg/g of one or several xanthophyll(s), at least 1 mg/g of one or several sterol(s) and at least 2 ?g/g of one or several phycoprostane(s), and its applications in particular as a food supplement in the prevention of the apparition of cognitive disorders.

Abstract: Reaction casing (1) for a photosynthetic reactor suitable for cultivating photosynthetic microorganisms, in particular algae, said reaction casing (1) being designed for both floating on an expanse of water and defining a path for a gas/liquid culture medium to flow in two phases between a first and a second opening (11, 12) of said casing. The casing comprises, on the one hand, an upper membrane (31) and a lower membrane (32) made at least partially of a flexible material, hermetically sealed and transparent to light radiation, said membranes being hermetically connected to one another by connecting lines (41, 42) defining inflatable cells (33, 34) and, on the other hand, connection elbows (35, 36) joining said cells in pairs to define the course of flow in a generally sinuous form, one of the cells (33) being fluidly linked to the first opening and another cell (34) being fluidly linked to the second opening (12).

Abstract: Methods for cultivating photosynthetic microorganisms are described. The method includes the steps of injecting a liquid culture medium into a photosynthetic reactor according to a controlled flow rate, injecting a gas into the reactor according to a controlled flow rate through a gas injector of the reactor so that the gas injected through the gas injector moves up to as far as the exhaust by circulating in the reaction pipe, in a direction of circulation from the low end to as far as the high end of the reaction pipe, circulating the liquid culture medium with the circulation device, and controlling the circulation device and the gas injector in order to establish in at least one substantially horizontal reaction section of the reaction pipe gas/liquid two-phase flow conditions of the laminated flow or slug flow or elongated bubble flow type.

Abstract: A photosynthetic reactor (1) suitable for cultivating photosynthetic microorganisms, notably algae, comprising at least one photosynthetic reaction pipe (2) at least one return pipe (3), at least one means (4) for circulating the liquid culture medium, at least one gas injection means (5) and at least one exhaust means (6) positioned in the high portion of the reactor (1), wherein the placement of the gas injection means (5) and/or the conformation of the reaction pipe (2) or of the return pipe (3) are designed so that the gas injected by the injection means (5) rises again to the exhaust means (6) by circulating in the reaction pipe (2), in a low-to-high flow direction, so that the injected gas and the liquid culture medium establish a gas/liquid two-phase flow in a substantially horizontal reaction section (23) of the reaction channel (2). The present invention finds application in the field of cultivating photosynthetic microorganisms and notably algae.

Abstract: Reaction jacket for a photosynthetic reactor, configured to float on an expanse of water and to define a gas/liquid culture medium diphasic flow path between first and second openings of the reaction jacket, the jacket including two sheaths, outer and inner, respectively, at least partially made from a material transparent to light radiation, the inner sheath extending inside the outer sheath such that these sheaths define an inter-sheath space between them in fluid connection with the first opening of the jacket, where the outer sheath has an open proximal end and a closed distal end, and the inner sheath has an open proximal end in fluid connection with the second opening of the jacket and a distal end provided with at least one communication orifice between the inside of the inner sheath and the inter-sheath space.

Abstract: “A reaction casing for a photosynthetic reactor designed firstly to float on a body of water and secondly to delimit a biphasic flow pathway for gas/liquid culture medium between a first and a second opening of the casing, where the casing includes two claddings, respectively outer and inner, made at least in part of a material transparent to light rays, the inner cladding extending inside the outer cladding so that the claddings delimit between them an inter-cladding space in fluid connection with the first opening of the casing, the outer cladding has an open proximal end and a closed distal end and in the inner cladding has an open proximal end in fluid connection with the second opening of the casing and a distal end provided with at least one communication orifice between the inside of the inner cladding and the inter-cladding space.

Abstract: A photosynthetic reactor (1) suitable for cultivating photosynthetic microorganisms, notably algae, comprising at least one photosynthetic reaction pipe (2) at least one return pipe (3), at least one means (4) for circulating the liquid culture medium, at least one gas injection means (5) and at least one exhaust means (6) positioned in the high portion of the reactor (1), wherein the placement of the gas injection means (5) and/or the conformation of the reaction pipe (2) or of the return pipe (3) are designed so that the gas injected by the injection means (5) rises again to the exhaust means (6) by circulating in the reaction pipe (2), in a low-to-high flow direction, so that the injected gas and the liquid culture medium establish a gas/liquid two-phase flow in a substantially horizontal reaction section (23) of the reaction channel (2). The present invention finds application in the field of cultivating photosynthetic microorganisms and notably algae.

Abstract: Reaction jacket for a photosynthetic reactor, configured to float on an expanse of water and to define a gas/liquid culture medium diphasic flow path between first and second openings of the reaction jacket, the jacket including two sheaths, outer and inner, respectively, at least partially made from a material transparent to light radiation, the inner sheath extending inside the outer sheath such that these sheaths define an inter-sheath space between them in fluid connection with the first opening of the jacket, where the outer sheath has an open proximal end and a closed distal end, and the inner sheath has an open proximal end in fluid connection with the second opening of the jacket and a distal end provided with at least one communication orifice between the inside of the inner sheath and the inter-sheath space.