Abstract: The invention relates to a process for the decomposition of polyhalogenated aliphatic compounds having 1 to 8 carbon atoms, polyhalogenated cycloalkyl compounds having 5 to 8 carbon atoms and polyhalogenated aromatic compounds having at least 5 carbon atoms. A contaminated substrate or the polychlorinated compounds per se are heated with a suitable catalyst to 150.degree. to 550.degree. C. The process according to the invention is especially suitable for the decomposition of polychlorinated dibenzodioxins and dibenzofurans in soils, scrap loads and waste gases and for decontaminating filter dust from refuse and waste incineration plants.

Abstract: The invention relates to a process for the decomposition of polyhalogenated aliphatic compounds having 1 to 8 carbon atoms, polyhalogenated cycloalkyl compounds having 5 to 8 carbon atoms and polyhalogenated aromatic compounds having at least 5 carbon atoms. A contaminated substrate or the polychlorinated compounds per se are heated with a suitable catalyst to 150 to 550.degree. C. The process according to the invention is especially suitable for the decomposition of polychlorinated dibenzodioxins and dibenzofurans in soils, scrap loads and waste gases and for decontaminating filter dust from refuse and waste incineration plants.

Abstract: A sample head (50) for nuclear magnetic resonance whole-body tomography or localized in-vivo nuclear magnetic resonance spectroscopy comprises an RF coil (51) having a plurality of inductive sections in the form of metallic strips (53 to 60) and capacitive sections in the form of gaps (61 to 68) arranged alternately one behind the other in the direction of the RF current (I.sub.1), so that the field lines (72) of the magnetic RF field (H.sub.1) generated by the RF coil (51) extend in parallel to an axis (74) defined by the RF coil (51). The RF coil (51) forms a single unit with an outer jacket (52). The number of inductive and capacitive sections is such as to be just below that limit value above which the distribution of the field lines (71) of the electric RF field (E.sub.1) produced by the said RF coil (51) changes from a first distribution (75), where there is a plane (76) between each inductive section (55) and the said axis (74) in which the strength of the electric RF field (E.sub.

Abstract: A resonance system for ESR spectroscopy has a resonance cavity (23) which connected by axial slots (25) with chambers (24) coaxial to the resonance cavity (23). The resonance cavity (23) and the chambers (24) are located within a metallic screen (21). The wall sections (26) of the resonance cavity (23), separated by the axial slots (25), form the inductances of the resonance circuit, whereas the wall sections of the axial slots (25), located opposite one another, form the capacitances. The entire resonance system, including the screen, is made of metal and is, therefore, suitable for use at extremely low temperatures.

Abstract: A multi-purpose radio of the AC or battery operated type which includes connections for an auxiliary unit which is an alarm device of the ultrasonic type in which the transducers of the alarm device are mounted on the radio cabinet. The output of the alarm device is applied to the audio frequency amplifier section of the radio.