[en] According to the invention, a method for the simultaneous detection of antigens and their antibodies by solid-phase radioimmunoassay is given. An unknown serum is brought into contact with a layer of known antigen content on the walls of a container. After incubation, the serum is removed and radioactively labelled antigen is added. After repeated incubation, the radioactivity in the layer on the walls of the solid is determined. For the simultaneous detection of antigen with at least one bonding position or of its antibodies, possessing at least two bonding positions per molecule, the sample of the serum to be investigated in first incubated with a known amount of the antibody, and the mixture is then contacted with the container walls having a coating of known antigen content. Only body liquids that do not coagulate can be used as investigation material. (VJ)

No abstract available

[en] Non-desarguesian plane projective geometries fit into the propositional formulation of quantum theory as given by Piron (1972). If the plane is coordinated by Cayley numbers the units can be identified with a base of infinitesimal generators of the Lorentz group. (Auth.)

[en] In a recent paper we studied the construction of geometries which have different characteristics in the exterior and interior of a hadron, e.g., are conventional in the exterior case, but generalized in the interior one. In this paper we continue this study under the more specific condition that a hadron is a closed non-selfadjoint system, that is, it verifies the general conservation laws of total quantities, but the internal forces are of non-potential type. We begin our study with the indication that non-Desarguesian geometries apply to open non-selfadjoint systems, such as particles under a combination of a constant gravitational field and resistive forces. We then pass to the problem of structure of a hadron by pointing out that the departures from conventional relativity settings in the interior strong problem indicated by recent experiments suggest that the right geometry for a hadron could have a suitable combination of non-Euclidean and non-Desarguesian characters. All possible models of non-Euclidean geometries are exhibited first. We then pass to the identification of as many non-Desarguesian planes as made possible by available axiomatic, algebraic and group theoretical approaches. The construction of a geometry which is non-Euclidean (e.g., Galilean or Minkowskian) in the exterior problem, and non-Desarguesian in the interior case is then discussed. We provide a geometric interpretation of the recent discovery of the violation of the time-reversal symmetry announced at our Conference by Slobodrian and Conzett, as well as the violation of the SU(2)-spin symmetry indicated by Rauch's experiments. In fact, our geometries can recover these symmetries for the trajectory of the center of mass of a hadron, while the symmetries are violated in the interior strong problem

[en] The Schroedinger equation with a potential well is transformed to a new equation, here called ''hadron-equation.'' The discrete spectrum of the equation fits the hadron masses-mesonic and baryonic-just excellent, especially the so-called ''stable'' hadrons. A new O^- boson at 4000 GeV is predicted. A similar but more drastic treatment of the DIRAC-equation leads to a ''nuclear equation.'' Its lowest eigenvalues is 15 MeV, the average binding energy of a pair of nuclei. The next few eigenvalues may be identified with Q-values of (stable) hadrons. Only 5 neutral constants (h,c,e,m/sub el/,m/sub p/), no fitting parameters, are used. The symmetry of these two new equations is remarkable: besides the combination of the physical constant involved, they are identical

[en] Propositional calculus is used to interpret projective planes as spaces of states. For finite planes the 3 lowest lying octets (baryonic, antibaryonic, mesonic) are fitted, together with 64 standard strong vertices, in the smallest exceptional non-Desarguesian plane. In the infinite case, the lines in a Euclidean plane were redefined and so some spatial symmetry appeared as a broken symmetry. This may be interpreted as a hadronic medium in the sense of Santilli. (orig.)

[en] The possibilities of an economical extraction and technical application of low-activity fission products (krypton, xenon, rhodium, palladium, ruthenium, technetium) from radioactive wastes are shown. A survey is presented on the production, properties and quantities of fission products in nuclear fuel, on their application, the demand to be expected by the year 2000, and the supply from natural resources, as well as the economic prospects of pilot plants producing fission products. (author)

[en] Radioactive and stable isotopes are increasingly used for the solution of analytical problems related to environmental protection. The advantages of isotope techniques are high detection sensitivity and the possibility of distinguishing isotopes of one and the same element. A survey of the development in recent years and of the resulting analytical procedures is given. In particular, tracer methods, radiochemical analytical techniques (activation analysis, radioreagent-radiorelease, isotope dilution etc.), radiometric techniques (absorption-scattering and backscattering of nuclear radiation, excitation of secondary radiation, ionization gas analysis etc.), measurements of isotopic abundance and irradiation of sewage and off-gases are discussed. (author)

No abstract available

[en] Full text: Despite all theories and discussions about (negative) effects of radioactivity, radon is applied for therapeutic purposes in many places in the world. In Badgastein (Austria), one of the leading radon therapy sites worldwide, radon, alongside inhalation, is also applied as underwater radon therapy. For 20 to 30 minutes patients treated are bathing in the 'Best'sche Wanne', a bath-tub filled with 600 litres of water, with concentrations of approximately 1000 Bq/litre. During the exposure phase in the bath, radon progeny deposit on the skin of the patients. For the theoretical calculation of the deposition dynamics, reliable and quantifiable results of progeny measurements on the skin are of fundamental importance. Immediately after leaving the bath tub the skin of the patients was gently dried by dabbing it with towels and alpha detectors were fixed to the skin by elastic bands. The activity decay curve and the alpha spectrum were measured for a period of 30 minutes after the exposure phase, starting app. 3 minutes after leaving the bath-tub. Though the detectors are almost in direct contact with the skin, on which the alpha particles are deposited, a strong distortion of the spectra could be observed. We assume this effect to be a combination of absorption and migration of the progeny into the skin. With model assumptions on the migration behaviour and the production of sweat during the measurement, we tried to interpret the shape of the spectra, in order to obtain quantitative measurements of the radon progeny on and in the skin. (author)