Abstract: The invention relates to a filament comprising thermoluminescent particles that are evenly distributed in a polymer matrix, characterized in that the polymer matrix is a thermoplastic polymer having sufficient adhesion with respect to said thermoluminescent particles in order to ensure the cohesion of said filament and being such that the thermoluminescent response (signal) of the filament corresponds substantially to the dose of radiation absorbed and obtained after the filament is placed in contact with a physiological medium. The invention also relates to a method for thermoluminescence-based measurement of doses of beta radiation delivered by a transmitter on a target organ of a mammal, characterized in that a group of inventive filaments is introduced to the desired spot, whereby part of the length of said filaments remains outside the irradiated area, and in that the filaments are removed after irradiation and thermoluminescence is determined.

Abstract: Agent for the fluoridation of organic compounds having the general formula (I), wherein Q+ represents either: (i) a cation having the formula (II), wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 which may be the same or different, represent an alkyl radical having from 1 to 20 atoms of carbon, an aryl radical or an aralkyl radical, the number of atoms of carbon in R.sub.1 +R.sub.2 +R.sub.3 +R.sub.4 being at least equal to 13 and preferably between 15 and 22, or: (ii) a polymer matrix carrying functions of formula (III), wherein: R.sub.5, R.sub.6 and R.sub.7, which may be the same or different, represent a lower alkyl radical having from 1 to 6 atoms of carbon and n is a mean value comprised between 1.5 and 2.5, preferably between 1.8 and 2.1. Utilization for the fluoridation of acetylenic compounds mono or biactivated by addition of HF and for the preparation of organofluorinated compounds by nucleophilic substitution.