The invention relates to bifluorenylidene derivatives and their corresponding radical anions and radical-cations of the following general formula (II): wherein: Y = C=O and m is an integer =0, preferably m = 1, with the proviso that when m = 0, A = boranyl; A = H, OH, alogen, amino group, thiol group, alkyl, oxyalkyl, alkenyl, alkynyl, aryl, boranyl. The invention also relates to the method of syn...

The invention relates to 1,3,5-benzene derivatives and corresponding radical-anions and radical-cations of the general formula (I): wherein: Z is a group chosen from among C=O, CONH, CONR, CONAr; m is an integer >0, preferably m = 1; A is a group chosen from among the radicals of: biphenylene, carbazole, fluoranthene, fluorene, dibenzothiofene, dibenzofurane, fluorenone, bifluorenylidene, tripheny...

The element (1) has a stop system comprising an annular wall surrounding an axis (5) of a passage channel (3) in a body (2). The annular wall is sub-divided into segments in a circumferential direction. The segments are movable, and cover a circumferential contiguous zone of 180 degrees. The segments are realized in the form of tilting wings (12) that pivot from a mounting position to a stop posit...

The process for preparing a self-healing composite material comprising a matrix of epoxy polymer, in which a catalyst of ring opening metathesis reaction and microcapsules containing a cyclic olefin having 7 to 40 carbon atoms are dispersed, comprises the steps of: - preparing a mixture of a precursor of the epoxy polymer, having at least one oxiranc ring, a curing agent chosen from the group c...

An automatic system for anti-roll stabilization of watercraft, comprising: - a stabilizing fin (12) that can turn about an axis (18); - an actuator assembly (14), designed to govern rotation of said fin (12) about said axis (18); and - a regulating system (16), designed to govern said actuator assembly (14) as a function of signals indicating rolling of the watercraft. Said actuator assembly (...

The invention relates to a seal arrangement for sealing between a first and a second part of a chain, which can be at least pivoted relative to each other, comprising the following features: A sealing ring for sealing a lubricant chamber between the parts that can be pivoted relative to each other, having an annular sealing edge provided for the sealing abutment against a mating surface of one of ...

A direct-current electric motor, particularly for operating automatic sliding doors, comprising a single stator body (2) that supports permanent magnets (3) and accommodates a rotor (4) constituted by a single driving shaft (5) around which a first winding (6) and a second winding (7) are wound. The first winding (6) and the second winding (7) are concentric, superimposed and electrically insulate...

The board (1) has a cover (20) arranged in a lifted position and including an outer cut surface (21) for receiving products to be cut. A base body (10) is in a lowered position. The base body, the cover and lateral closure elements (30) are attached to each other by form-fit connections. The cover has downwardly aligned cover projections (23), which are inserted into interior of hollow spaces in t...

An apparatus (10) for shredding a material, in particular plant material, especially grassy material, comprises a frame (12) that defines a compartment (19) for housing a shredding rotor (20) mounted with its axis of rotation substantially transversal, and having at least one opening (24, 26) for the passage of the material and extending longitudinally of the apparatus. Means, located at the respe...