Abstract: An adjustment device for adjusting a moving portion of a motor vehicle headlight relative to a fixed portion, in particular a reflector relative to an intermediate part of the headlight, the device being of the type comprising a screw that includes a ball member received in a seat connected to one of the portions and a thread engaging in tapping connected to the other portion, wherein the ball seat and the tapping are respectively provided on two elements each including assembly means enabling it to be assembled to corresponding assembly means provided on said respective portions merely by relative displacement.

Abstract: Novel radioactive estradienes labelled with tritium of the formula ##STR1## wherein .sup.3 H is tritium and R is selected from the group consisting of hydrogen, alkyl of 1 to 6 carbon atoms and acyl of an organic carboxylic acid of 1 to 10 carbon atoms and the study and radioimmunological determination of non-radioactive 11.beta.-(4-dimethylaminophenyl)-17.alpha.-(prop-1-ynyl)-.DELTA..sup.4,9 -estradiene-17.beta.-ol-3-one and its metabolites in biological fluids and novel intermediates.

Abstract: Novel radioactive estradienes labelled with iodine of the formula ##STR1## in the form of their syn or anti isomers or mixtures thereof wherein the wavy line indicates anti or syn position, R is selected from the group consisting of hydrogen, alkyl of 1 to 6 carbon atoms and acyl of an organic carboxylic acid of 1 to 12 carbon atoms and R.sub.1 is the residue of an amino acid R.sub.1 NH.sub.2 possessing an iodine acceptor group or a derivative thereof labelled with iodine .sup.125 or .sup.131 and their preparation and novel intermediates, antigens prepared from the compounds of formula I and bovine seric albumin or human seric albumin and their preparation and their use for the preparation of antibodies.

Abstract: Novel radioactive .DELTA..sup.4,9,11 -estratrienes marked with iodine 125 or 131 having the formula ##STR1## wherein R is selected from the group consisting of hydrogen, alkyl of 1 to 6 carbon atoms and acyl of an organic carboxylic acid of 2 to 12 carbon atoms, R.sub.1 is the reminder of an amino acid of the formula R.sub.1 NH.sub.2 or a derivative thereof being marked with iodine 125 or 131 and the wavy lines indicate the --OR is in the .alpha.- or .beta.-position and the oximido group is in the syn or anti position, a process and intermediates for their preparation, antigens prepared therefrom and use thereof to prepare antibodies.

Abstract: In a train control system wherein emitter beacons are located at predetermined points on the track near to one of the running rails, a device for detecting the position of a vehicle running on the railway track. It comprises into each beacon a radiating vertical-axis coil powered by an alternating current of a given frequency and, on board the vehicle, near to the corresponding rail, a pick-up unit including two pairs of receiver coils the axes of which are horizontal and perpendicular to the running rails. The associated circuits comprise two differential amplifiers connected to at least to two band-pass filters and a multiplier circuit in order to generate a positive signal when and only when the beacon is located between the two pairs of coils and the frequency of the beacon is the central frequency of the filters.

Abstract: Novel .DELTA..sup.1,3,5(10),6 -estratetraenes of the formula ##STR1## R is selected from the group consisting of hydrogen, acyl of an alkanoic acid of 1 to 5 carbon atoms, optionally substituted benzoyl, tetrahydropyranyl, trityl and trimethylsilyl and R.sub.1 is selected from the group consisting of acyl of an alkanoic acid of 1 to 5 carbon atoms, optionally substituted benzoyl, tetrahydropyranyl, trityl and trimethylsilyl, novel intermediates therefore, process for the preparation of estradiols marked with a tritium atom and the novel tritiated estradiols which are useful to the study and dosage of specific receptors of estrogen.