No abstract available

[en] The interaction of the detonation of a solid HE-charge with a non-premixed cloud of hydro-carbon fuel in a chamber was studied in laboratory experiments. Soap bubbles filled with a flammable gas were subjected to the blast wave created by the detonation of PETN-charges (0.2 g < mass < 0.5 g). The dynamics of the combustion system were investigated by means of high-speed photography and measurement of the quasi-static chamber pressure

[en] In this paper we present numerical simulations of the interaction of a blast wave with an acetylene bubble in a closed chamber. We model the system using the inviscid Euler equations for a mixture of ideal gases. The formulation specifies the thermodynamic behavior of the system using a Chemkin interface and includes the capability to model combustion as the ambient air mixes with the acetylene. The simulations are performed using a three-dimensional adaptive mesh refinement algorithm based on a second-order Godunov integration scheme. Simulations are compared with experimental measurements for the same configuration

[en] A new test for flexirubin-type pigments has been developed based on the incorporation of labelled biosynthetic precursors into the pigments and autoradiographic analysis of chromatograms. The test is simple enough to allow the screening of a large number of organisms, and it can be applied directly or in a modified form to discover colorless building blocks or structural variants not easily found with former methods. (Auth.)

No abstract available

[en] Pressure fields in the vicinity of reactor buildings may be investigated by: 1) linear wave equation; 2) nonlinear or linear equations of motion, in Lagrangian or Eulerian formulation; 3) experiments. These pressure fields include the pressure loading on the surfaces of building structures. A variational approach to simulate complex physical processes such as wave propagation in gaseous media, depressurization of subcooled fluids and dynamic deformation of structures was used to establish the basic concept for the code system SAN (Structural Analysis). Finite element techniques were applied for discretization of solid, fluid and gaseous media. (orig./WL)

[en] The research in the gas industry is various but also badly known. The aim of this workshop was to debate the question of the organization and financing of research in order to keep the gas industry dynamics up. The domains in concern are: - the protection of gas transport and distribution infrastructures, the detection of gas plumes and the assessment of risks; - the abatement of CO₂ emissions using clean processes and the sequestration of CO₂; - the transition towards an hydrogen economy. Six participants have presented their research works and projects in these domains. (J.S.)