摘要:
The invention concerns isolated autotrophic aerobic bacteria capable of oxidising As(III) into As(V) using CO2 as only carbon source and As(III) as only energy source. The invention also concerns a use of said bacteria in treating media containing arsenic.
摘要:
The invention concerns a spiral exchanger, consisting of two overlapping fluid circuits, a first circuit formed by the space included between two spaced sheets (1, 2) wound on themselves and a circuit formed by the space included between the successive turns of said winding. Said exchanger is characterised in that the two sheets (1, 2) comprise, on their opposite surfaces, spacing elements, said spacing elements being arranged along the longitudinal axis of the sheets (1, 2), so that, once the sheets are wound, the spacing elements of a sheet (1) are urged to be pressed on the corresponding spacing elements of the other sheet (2), the end surface of at least one of the two pressed spacing elements is globally planar.
摘要:
The invention concerns a method for making very fine particles containing at least an active principle inserted in a host molecule and a device for implementing said method. The method is characterised in that it consists in forming a solution of the active principle in a first liquid solvent and of a product formed by the host molecules in a second liquid solvent, then in contacting the resulting solutions with a supercritical pressure fluid, so as to precipitate the host molecules which are dissolved therein.
摘要:
The invention concerns a method for making a wall element, in particular a ceiling element, consisting of a polygonal frame (1) whereon is stretched a fabric (3); said method which consists prior to fixing the fabric (3), in bending said frame (1) outwards on each of its sides (5a, 5a', 5b, 5b') so as to provide it with a deflection such that, when the fabric (3) is fixed on the frame (1), the tension exerted by the fabric deforms in reverse said side and brings it back to its initial position before its pre-deformation. Said method is characterised in that the bending is carried out at a distance from the ends of each of the sides.
摘要:
The invention concerns a device for positioning a plate (3) on a roll (1), in particular a chopper or folding roll. Said device is characterised in that the roll is provided with magnetic fixing means maintaining the plate on the surface thereof, and two centring elements whereof at least one (9) is mobile and longitudinally spaced apart from the first, so as to co-operate with matching means maintaining the plate (3), the mobile centring element (9) being linked to control means (15) for displacing it along the transverse axis of the roll (1).
摘要:
The invention concerns a spiral heat exchanger, consisting of a series of spiral plates spaced apart from one another by spacer elements (3), wherein the spiral plates are formed by a coiled flattened tubular element and consisting of at least a sheet of material (1) whereof the edges (1a, 2b) are sealingly assembled by linking means (4) which extend parallel to the longitudinal axis (yy') of the sheet (1) Said exchanger is characterised in that the flattened tubular element comprises on its outer surfaces ribs (3) inclined relative to its transverse axis (xx').
摘要:
The invention concerns a method for collecting and encapsulating with a coating agent particles dispersed in a fluid at supercritical pressure and an installation for implementing said method. Said method is characterised in that it comprises steps which consist in: expanding said fluid at a pressure less than its critical pressure, so as to bring it to a gaseous state; causing said gas to trickle down in a liquid consisting of a solution substantially saturated with the coating agent in a solvent in which the particles are insoluble, so as to extract at least partially the solvent; and causing the coating agent to precipitate onto the particles thereby forming microcapsules.
摘要:
The invention concerns a mechanical transmission automatic selector varying from an infinite ratio to 1/1, comprising an input plate integral with the input shaft and bearing regularly distributed over a ring centred on the input shaft, first pivots (2) whereon are articulated weights (1), such that any difference in rotational speed between the output and input shafts causes a displacement of the weights (1), increasing the torque transmitted to the output shaft, connecting rods (14) fixed on second pivots (13) integral with the weights (1), and on third pivots (10) articulated about a crankpin (7) of the crankshaft forming the output shaft. The invention is characterised in that each weight (1) elongated in shape, having an outer convex surface (1a) and an inner concave surface (1b), is connected at the front to the first pivot (2) on the input shaft by a double articulation device (2, 11; 12, 15) providing a limited circumferential displacement of the counter-weight (1) relatively to the first pivot (2).
摘要:
The invention concerns a method for capturing very fine particles present in a fluid flux in liquid, gaseous or supercritical state and a device therefor. The method is characterised in that it comprises steps which consist in: causing said flux to pass through a filtering element (13); stopping the emission of said flux; countercurrent clearing of the filtering material (31) with a carbon dioxide flow under pressure, so as to drive the particles deposited on the filtering material (31); countercurrent expanding of the flux, so as to trap the particles within a solid carbon dioxide snow-type mixture formed during its expansion.
摘要:
The invention concerns a wall slab, in particular for a ceiling, consisting of a frame (1) and a fabric stretched (3) thereon. Said slab is characterised in that each of the frame (1) sides consists of a shaped element (2) comprising two wings (2a, 2b), an external wing (2b) on the base (6) of which the fabric (3) is fixed and an internal wing (2a) whereof the base (4) is located recessed from the base (6) of the external wing (6), so as not to be in contact with the fabric (3).