Abstract: New lymphokine and its isolation and purification process. Said lymphokine is comprised of a factor obtained from T cells stimulated by concanavaline A or by an antigen capable of inhibiting the IgE-dependent platelet citotoxicity with respect to young larvae of S. Mansoni, of strongly reducing the chemiluminescence of blood platelets in a reaction IgE-anti-IgE, which is a correlate of the anti-parasite cytotoxicity, and of inhibiting the platelet activation in non-IgE dependent intolerences. Application as suppressor agent for suppressing platelet activation and as immunomodulator medicament of allergies.

Abstract: A one-piece woman's competition swimming suit has a continuous elastic edging, made in a single piece, forming a closed loop around the openings for the passage of the legs in the lower portion of the suit, rising at a slant along the lateral sides of the suit, then forming the lower peripheral edging of the upper portion of the suit, and joined to a transverse edging of the upper portion of the back of the suit essentially in a central region thereof in which two back straps converge, and are also connected to the transverse edging. The transverse edging can form a continuation of the armpit edging of a breast panel of the suit.

Abstract: An infra-red imaging device consisting of two sheets of interconnected disks of piezoelectric material, at least one of which has a ferroelectric transition temperature. A metal foil is provided between the sheets and mutually parallel, conductive strips are provided on both outer surfaces of the assembly thus formed, the direction of the strips on the one surface differing from that of the strips on the other surface. A generator for periodic signals which can be sequentially connected to each strip on one of the surfaces of the first sheet generates therein, via a piezoelectric effect, ultrasonic vibrations which are intercepted by the other sheet which converts these vibrations into electric signals. These signals are amplified and carry the image to be examined.

Abstract: A device in which focussed ultrasonic beams are used by way of binary distribution of the phase of the signals occurring in a mosaic of transducers. The material of which the transducers are made can be polarized, which enables the prefocussing of the ultrasonic beam to be transmitted or received, and also enables point-wise scanning and scanning by double focussing according to the X-direction and the Y-direction.

Abstract: A device for ultrasonic examination, comprising a flat mosaic of a row of transmission transducers and a number of rows of receive transducers which are symmetrically arranged with respect thereto. The device furthermore comprises means for applying actuation pulses to one transmission transducer at a time, and means for enabling receive transducers in the time interval following each actuation pulse, and for at the same time displaying on an image display device an image of a section of the examined body in a plane perpendicular to the plane of the mosaic and through the line of transmission transducers.

Abstract: A circuit for continuously recalibrating a gamma camera having a plurality of photomultipliers and signal channels which are weighted to control X and Y deflection on the display. Variation in signal channel gain is controlled and cancelled.