Abstract: A reactance filter, particularly in a branching circuit (ladder type),with surface wave resonators wherein omission weighted normal finger transducers are employed between reflectors such that the arrangement and plurality of the active fingers of the interdigital transducer are particularly formed for changing the capacitance relationship (static to dynamic capacitance) such that a narrow filter bandwidth is achieved.

Abstract: The present invention relates to compounds selected from formula I wherein R1, R2, R3 and R4 are the same or different and represent hydrogen, C1, to C6-alkyl, C5 to C6-cycloalkyl, phenyl and halogen, m and n are the same or different and represent the 2, 3, 4 or 5, X, A and B represent carbon and Y1, Y2, Z1 and Z2 are the same or different and represent hydrogen, hydroxyl (OH), amino (NH2), isocyanato (NCO) or 4-hydroxyphenyl.

Abstract: The present invention relates to new shaped articles which comprise active compounds and are based on thermoplastically processable, biologically degradable polymers, preferably polyesters, polyester amides, polyester urethanes and polyester urethane ureas, and their production and use for combating parasites on, around and in the environment of host animals, the shaped articles optionally serving, after use, for combating phytopathogenic insects on open-air or indoor plants.

Abstract: The present invention relates to a process for preparing fluorine-containing phenethylamines which is characterized in that, in a first step, a substituted bromobenzene is reacted with an N-vinylimide in the presence of a palladium catalyst, in a second step, the resulting substituted &bgr;-iminovinylbenzene is hydrogenated catalytically and in a third step, the substituted &bgr;-iminovinylbenzene obtained in the second step is cleaved. This process also provides access to novel &bgr;-iminovinyl- and &bgr;-iminoethylbenzenes.

Abstract: The invention concerns novel plant-treatment agents comprising: at least one thermoplastically processable biodegradable polyester amide, optionally in a mixture with one or a plurality of further thermoplastically processable, biodegradable polymer components; at least one agrochemical substance; and optionally additives. The invention further concerns a process for preparing these agents, and their use in the application of agrochemical substances.

Abstract: The invention relates to a completely biodegradable hydrogel comprising polyester polyurethane polyurea containing urea groups as well as polysaccharides and/or their derivatives, the hydrogel containing plant material capable of dividing. The invention also relates to a process for the embedding of the biological material and the fabrication and shaping of the hydrogels from aqueous solutions. The hydrogels according to the invention may be used as coating material for embedding biological material capable of dividing, especially plant material, preferably plant cells, protoplasts, plant tissues and plant organs, as well as zygotic or somatic plant embryos, under sterile conditions for the purpose of protecting the material during storage, transport and handling. The hydrogels according to the invention may also contain further additives, for example, plant protection agents or nutrients. The embedded biological plant material according to the invention may be used as artificial seed.

Abstract: A switchable claw coupling has two rotatably arranged coupling parts (2, 3). One of said coupling parts (3) is axially movable. To reduce the loads on the claws (20, 21) during the coupling operation, the coupling part 3 has a cam (22). The cam (22) at its end face is able to slide on a supporting face 28 of the other coupling part (2). A recess (23), in the supporting face (28), is engaged by the cam (22) to enable engagement within only a limited range.

Abstract: The invention concerns an oil-sealed vane-type rotary vacuum pump (1) with a rotor (3) and an oil pump (45, 46) whose suction chamber is fitted with feeds (64, 65) for gas and oil. In order to simplify the supply of a gas/oil mixture to the vacuum pump, the invention proposes that the gas and oil feeds (64, 65) are disposed in such a way that initially only oil and subsequently both oil and air are aspirated into the volume swept by the oil pump (45, 46) as it rotates.

Abstract: A measurement device for process measurement engineering with a measurement unit (2) and an evaluation device (3), the measurement unit (2) having a sensor, especially a temperature sensor, and the evaluation device (3) containing at least most of the electrical and electronic components and having a display and/or an adjustment capability. The number of types of measurement devices required to be maintained can be reduced and their possible applications increased by the measurement device (1) being modular and the measurement unit (2) and the evaluation device (3) being detachably interconnected both electrically and mechanically via standardized interfaces.

Abstract: A variable-pitch propeller, especially for a sport board, has angularly displaceable blade support plates which can be rotated about respective radial axes. The plates are provided with radially inwardly directed claws which engage in circumferential grooves of bases of the blades. The latter can have radial projections reaching beneath the claws. The resulting bayonet connection simplifies mounting and dismounting of the propeller blades even under water.

Abstract: In a method of operating a combined-cycle plant, valves (21) acting upstream of a high-pressure steam turbine (12) are completely closed in the event of load shedding. The gas-turbine group (A+8) is uncoupled from an intermediate-pressure/low-pressure steam turbine (11) in such a way that the gas-turbine group can go into island mode. In this case, the speed of the uncoupled steam turbine (11) is not greater than the speed of the gas-turbine group (A+8), and steam (16) in the flow path of a reheater (10a) belonging to the heat-recovery steam generator (10) expands freely through the intermediate-pressure/low-pressure steam turbine (11), in the course of which this expansion does not cause the speed of the gas-turbine group (A+8) to exceed its protective speed.

Abstract: A box-like trim tab for a high-speed motor boat or motor yacht has an inlet at its side pivotally connected with the stern of the boat so that it can allow the exhaust gas or a cooling liquid of the engine to pass through the trim tab and emerge at the open free side thereof. The trim tab reduces the noise generated by discharging the exhaust gas under the water or by conducting the exhaust gas through the water to the trim tab outlet.

Abstract: A diazotype reproduction material is a fibrous paper base having at least one overcoat, which is an acidic diazotype layer and a layer strata below the overcoat containing an anionic compound to minimize deep penetration of diazotype diazonium salts.

Abstract: Rigid polyurethanes are obtained by reacting (1) a polyisocyanate with (2) a polyol mixture made up of(a) an OH-functional polyester based on a C.sub.9-22 fatty acid with a molecular weight of from about 260 to about 2,000,(b) a non-functional oligomeric polyolefin with a molecular weight of from about 700 to about 6,000 and optionally(c) an at least difunctional polyol and/or polyamine with a molecular weight of from about 62 to about 8,000 (preferably from about 62 to about 400) which is different from (a),optionally in the presence of (3) a blowing agent such as water and (4) an auxiliary agent and/or additive of the type typically used in polyurethane chemistry.

Abstract: This invention relates to reinforced thermoplastic moulding compositions prepared from biodegradable polymers, for example aliphatic or polyester amides, aliphatic polyester urethanes, and to the use thereof for the production of mouldings and to the mouldings, wherein the reinforcing materials are selected from wood flour, fibres of natural origin, minerals of natural origin, cellulose and cellulose derivatives.

Abstract: The positions of blade members on a hub of a propeller for a sport boat is determined by replaceable keys or plates fitted into openings of corresponding shape and having differently located bores determining the pitch setting. The recess can be in the seat of the hub directly or in a blade carrier plate which can be mounted on the hub.

Abstract: Free-flowing compression molding compositions made up of from about 40 to about 80 wt. % of organic filler, from about 20 to about 60 wt. % of an organic reactive resin, and optionally further auxiliary substances and additives. The reactive resin contains an epoxide which may be liquid, a latent catalyst and a powdered polyisocyanate which is solid at room temperature.

Abstract: The invention concerns an oil-sealed vane-type rotary vacuum pump with a suction chamber (8) housing a rotatably mounted rotor (3) which has an anchoring section (21) and a bearing section (23) with a slot (24) in which two vanes (26) are mounted with a space (28) between them. The rotor bearing (3) comprises the bearing section (23) and a rotor-mounting bore (11). The vacuum pump also has an oil pump (45, 46), which produces a flow of oil through the space (28) between the vanes, and a system for controlling the flow of oil through the space (28), the oil passing through a channel (66) opening out in the rotor-mounting bore (11) and then through radial and longitudinal bores (68, 69) in the bearing section (23) of the rotor.

Abstract: Thermoplastically moldable, biodegradable, starch-containing polymer blends consisting essentially ofA) 100 parts by weight of anhydrous starch,B) from 0.1 to 70 parts by weight of polyurethane containing urea groups and based on selected starting materials,C) from 0.5 to 70 parts by weight of a plasticizer component andD) from 2 to 20 parts by weight of water,a process for producing these blends by mixing the individual components in plastics processing machines and their use for producing moldings, films, fibers, coatings or laminates by thermoplastic processing.