Abstract: A system for sorting metallic objects by magnetic separation has an electromagnetic core. The electronic core includes at least a first portion, a second portion, and a bottom. A sorting flap is arranged facing the electromagnetic core to fashion a circulation space for a conveyor of objects to be sorted from the first portion toward the second portion. The sorting flap includes a magnetic element arranged to form an air gap (E1) between the first portion and the sorting flap. The air gap forms a magnetic barrier opposing the passage of non-magnetic metallic objects, such that the objects are ejected from the conveyor. The second portion is arranged to ensure a return of the magnetic flux lines toward the first portion.

Abstract: The present invention relates to rosmarinic acid and to the derivatives thereof, expressed by the compounds of general formula (I), for the use thereof to prevent and/or treat disorders caused by ciguatoxin poisoning and for preparing a pharmaceutical composition for preventing and/or treating disorders caused by ciguatoxin poisoning.

Abstract: The present invention relates to rosmarinic acid and to the derivatives thereof, expressed by the compounds of general formula (I), for the use thereof to prevent and/or treat disorders caused by ciguatoxin poisoning and for preparing a pharmaceutical composition for preventing and/or treating disorders caused by ciguatoxin poisoning.

Abstract: Bistramide derivatives with virtually no toxic effects, of formula (I) wherein --R.sub.1, X, Y and R.sub.2 are a saturated or unsaturated hydrocarbonaceous chain having from 1 to 20 carbon atoms, substituted by at least one --OH group and/or a ketone function, including, if need be, at least one ring (a), the ring including one more unsaturations; --R.sub.3, R.sub.4 and R.sub.5 are the same or different and are selected from hydrogen, alkyl or alkoxy radicals having from 1 to 4 carbon atoms, a group --COOH, --OH, --NH or --NO.sub.2, or a halogen atom. The invention also concern bistramide derivatives of formula (I) such as ethers or esters and their isomers, excluding A, B and C bistramides. Said bistramides are useful especially as drugs having a cytostatic effect, in particular as antitumour or anti-parasitic drugs.

Abstract: An interferometric unit consisting of a birefringent plate combined with an isotropic plate.This unit makes it possible to work with materials whose birefringence is slight and/or to reduce the necessary thickness of the birefringent plate. The unit is suited for integration into an interferometric device whose particular application is the detection of gases with quasi-periodic absorption structure absorbing in the infra-red.

Abstract: Process and interferometric device for detecting and measuring the concentration, in a single operation, of all gases, having almost periodic absorption structures, contained in a gaseous mixture, each of the gases being associated with a characteristic path difference. Luminous flux is analyzed after passage through a cell containing the mixture, using to a multiple-wave interferometer, for example, a Fabry-Perrot interferometer, in which the inside faces of plates therein are highly reflective, and one of which plates is displaceable at a constant speed, it thus being possible to sweep a very wide range of path difference. Analysis of the output signal is performed frequency band by frequency band, by seeking the maximum.

Abstract: The apparatus includes at least one light-reflecting element (11) disposed on a portion of at least one of the conventional rotary elements (10) of the mechanism of a mechanical fluid meter. The apparatus further includes a light-emitting circuit (130) and a light-detecting and converting circuit (140) with first and second concentric fibers (21, 22) providing an optical connection between the circuits and the meter. The electrical signal delivered by the conversion circuit (140) is amplified and the amplified electrical signal is compared with first and second thresholds (S1, S2). An alarm and indicator circuit is responsive to the comparison made with the first threshold (S1), and a circuit (190) counts and stores the pulses delivered after comparison with the second threshold (S2).

Abstract: The substance of formula: ##STR1## called girolline, which is new, can be extracted from the Pseudaxinyssa cantharella sponge. It has remarkable antitumour properties.

Abstract: Interferometric device for the detection and/or analysis of gas, of the type comprising an optical assembly forming the image of a light source on the sensitive element of the detector, comprising a photoelastic modulator comprising a silica or fluorine plate associated to a piezoelectric ceramic to vibrate in order to give the plate a birefringency variable by compression, having an axis parallel to that of a birefringent plate and an interferential filter constituted by a grating multiplexer device; and having application to the interferometric detection of gas through high-sensitivity.

Abstract: Selective modulation interferometric detector, intended for specifically detecting and/or identifying at least one gas in a gaseous mixture, especially with the aim of carrying out analysis and/or proportioning operations, the assembly E consists of a first strip L.sub.1 of interferometric quality having plane and parallel faces, of thickness e and index n introducing a displacement .DELTA.=2ne adapted to the gas to be analyzed, this strip L.sub.1 supplying on the detector a brilliant fringe, and a second strip L.sub.2 made of the same material as the first strip L.sub.1 which is slightly prismatic and supplying on the detector average illumination.