Abstract: The present invention relates to a plastic pipe having improved resistance, inter alia, to methanol-containing fuels and improved mechanical properties, comprising.(I) at least one outer layer,(II) at least one inner layer comprising a polyvinylidene fluoride molding composition, and(III) a layer, disposed between the inner layer II and the outer layer I, comprising a molding composition comprising a mixture of:(a) polyamide and(b) polyalkyl acrylate,wherein the layers (I)-(III) are adhesively bonded to one another.

Abstract: Multilayer plastic pipes comprising a polyamide-based inner and outer layer, wherein the inner and outer layer are connected force-lockingly by means of at least one intermediate layer made of a mixture of a linear crystalline polyester and a polyamide, have improved stability to chemical agents and improved mechanical properties.

Abstract: A plastic pipe having improved resistance, inter alia, to methanol-containing fuels and improved mechanical properties comprising:(I) an outer layer made of a moulding compound based on polyamide,(II) an intermediate layer adjacent to the outer layer and made of a moulding compound based on a mixture of:(a) of from 95 to 99% by weight of a linear crystalline polyester, and(b) of from 1 to 5% by weight of a compound having at least two isocyanate groups,wherein the isocyanate groups originating from component (IIb) are present in the mixture of (IIa) and (IIb) in a concentration of from 0.03 to 0.

Abstract: Multilayer plastic pipe comprising at least one outer layer based on polyamide and at least one layer of a linear, crystalline polyester modified by means of an isocyanate mixture exhibits improved resistance, inter alia, to methanol-containing fuels and improved mechanical properties.

Abstract: A multilayer plastic pipe having improved barrier action against diffusion of the substance being transported, particularly methanol-containing fuels, dimensional stability, resistance to mechanical stress, and particularly improved adhesion between layers is provided comprising:(A) an inner layer and an outer layer, each of which comprise a polyamide-based molding composition, wherein the inner layer and outer layer may be the same or different, and (B) at least one intermediate layer comprisinga) 95 to 60% by weight of a linear, crystalline polyester andb) 5 to 40% by weight of a polymer containing reactive groups other than epoxide groups,wherein the reactive groups are contained in a concentration of from 4 to 95 mmol/kg based on the total amount of component (B); and wherein the layers are intimately bonded to one another.

Abstract: The subject of the present invention is the use of imexon for the production of pharmaceutical compositions with an immunosuppressive action. The present invention also provides pharmaceutical compositions containing imexon and further active materials.

Abstract: A plastic pipe having improved resistance to methanol-containing fuels and improved mechanical properties is provided. This is achieved by a multilayer plastic pipe consisting of at least one outer layer based on polyamide and at least one layer of a linear, crystalline polyester modified with isocyanates. With the aid of the invention it is possible to obtain plastic pipes having improved barrier properties against methanol-containing fuels and dimensional stability and mechanical load-bearing capacity.

Abstract: An operating mechanism for an aircraft door performs all the door motions and locking operations for the opening and closing of the door with the aid of electric motors which operate the respective elements of the mechanism through gear drives or through spindle drives to provide the power or torque moment for the respective motion. The motion sequence of the door operation is stored as a respective program in a memory of a central processing unit which in turn operates the electric motors in accordance with the programs. Operator initiated control signals are also provided to the central processing unit through respective panels. The pressurization and depressurization of the aircraft cabin is integrated into the door control so that pressurization cannot take place unless the doors are fully closed and locked and so that door opening cannot take place until depressurization is completed.

Abstract: An operating mechanism for an aircraft door performs all the door motions and locking motions for the opening and closing of the door with the aid of electric motors which operate the respective elements of the mechanism through gear drives or through spindle drives to provide the power or torque moment for the respective motion. The door sealing may be accomplished with contact hardware components or with toggle hardware components for taking up the forces resulting from the internal cabin pressure. The door is hinged to the aircraft body structure by a guiding and supporting hinging element, one end of which is hinged to the aircraft body structure while the other end is hinged to the door structure. The door swinging motions in the opening and closing directions, the door opening and closing motions and the door locking and unlocking motions are all performed by program controlled electric motors. Such motors also control the deployment of an emergency escape slide.

Abstract: The present invention is concerned with the use of compounds of the general formula: ##STR1## and of the pharmacologically acceptable salts thereof, as well as of the optical isomers thereof for the preparation of pharmaceutical compositions with antiviral action.The present invention also provides new phospholipid derivatives.

Abstract: A direct-voltage flyback converter includes a primary winding of a transformer in series with the switching path of a controllable switch which is connected in turn to a control device (P). A first capacitor (C1) in series with a first diode (D1) is connected in parallel with the transformer primary winding (N1). A series circuit consisting of a first coil (L1), a second diode (D2) and the first capacitor (C 1) is connected in parallel with the switching path. In order to regulate the output voltage of the switched-mode direct-voltage flyback converter accurately and with low losses, and without the control device being activated from the secondary side, a sensing circuit (M) and a demagnetization circuit (A) are connected to the control device (P). A winding (N3) of the transformer (Tr) is connected in the sensing circuit (M) and a second coil (L2), coupled to the first coil (L1), is connected in the demagnetization circuit (a).

Abstract: The present invention provides compounds of the general formulae: ##STR1## wherein R.sub.1 and R.sub.2, which can be the same or different, are hydrogen atoms or C.sub.1 -C.sub.5 -alkyl radicals, C.sub.3 -C.sub.5 -alkenyl radicals or phenyl radicals or, together with the carbon atom to which they are attached, form a saturated or unsaturated C.sub.3 -C.sub.7 ring, R.sub.3 and R.sub.4, which can be the same or different, are hydrogen atoms, straight-chained or branched C.sub.1 -C.sub.10 -alkyl radicals, straight-chained or branched C.sub.3 -C.sub.7 -alkenyl radicals, C.sub.3 -C.sub.7 -cycloalkyl radicals, C.sub.3 -C.sub.7 -cycloalkenyl radicals, phenyl, arylalkyl or hetarylalkyl radicals, R.sub.5 is a hydrogen atom or a lower alkyl radical and X is an oxygen or sulphur atom or an imino group.The present invention also provides processes for the preparation of these compounds, as well as pharmaceutical compositions with immunosuppressive action containing them.

Abstract: In a circuit arrangement for limiting the switching-on current peaks in a switching transistor (T), for example, a switching transistor in a direct voltage converter, rectangular switching pulses of the same height (UST) are applied to the control input of the switching transistor. In order to protect, for the largest possible number of types of application, the switching transistor (T) having an equally dimensioned coil (PW) from overload, the coil is included in a branch which is common both to the control circuit and to the operating circuit of the switching transistor. For simultaneously monitoring the operating current (I) in a direct voltage converter (UB, UA), the coil is the primary coil of a current transformer (STW), whose secondary circuit includes, inter alia, the series-combination of a saturable choke (DR) and a load resistor (RB2).

Abstract: The present invention relates to a process for the preparation of 1-(m- and p- hydroxyphenyl)-2-aminoethanol which consists of converting an m- or p- hydroxyacetophenone to an isonitrosoketone followed by hydrogenation of the isonitrosoketone. These compounds are sympathomimetics which produce vasoconstricting and cardiotonic effects.