Abstract: Polymers of ethylene are obtainable by polymerization of ethylene and, if desired, further comonomers in the presence of a catalyst system comprising as active constituents I) a Phillips catalyst, II) a solid which is different from I) and comprises a component which is derived from the metallocene complexes of the formula (A) in which the substituents and indices have the following meanings:  R1 to R10 are hydrogen, C1-C10-alkyl, 5-to 7-membered cycloalkyl which may in turn bear C1-C6-alkyl groups as substituents, C6-C15-aryl or aryalkyl, where two adjacent radicals may also together form a cyclic group having from 4 to 15 carbon atoms, or Si(R11)3, where R11 is C1-C10-alkyl, C6-C15-aryl or C3-C10-cycloalkyl, or the radicals R4 and R9 together form a group —[Y(R12R13)]m—, where Y is silicon, germanium, tin or carbon, and R12, R13 are hydrogen C1-C10-alky, C3-C10-cycloalyl or C6-C15-aryl, M is a metal of transition groups IV to VIII or a metal of the lanthanide

Abstract: In a continuous gas-phase polymerization process for preparing ethylene and propene homopolymers and copolymers, in which ethylene, propene or a mixture of ethylene or propene and C3-C8-&agr;-monoolefins is polymerized in the polymerization zone of a gas-phase polymerization reactor at from 30 to 125° C. and a pressure of from 1 to 100 bar in the gas phase in a bed of finely divided polymer in the presence of a catalyst, where the reactor gas is circulated to remove the heat of polymerization, polymer deposits in the circulating gas line are prevented by metering a catalyst poison having a boiling point above the maximum temperature within the circulating gas line into this circulating gas line in at most such an amount that it does not significantly impair the productivity of the catalyst in the reactor.

Abstract: An exhaust gas muffler for an internal combustion engine, especially in a manually guided implement such as a power chain saw and the like, is provided. The muffler has a housing having an inlet opening and an outlet for engine exhaust gas. An essentially cylindrical spark killer screen is fixed in position at a wall opening of the muffler housing that forms the outlet. The spark killer screen projects into the interior of the muffler housing. Adjoining the spark killer screen on the outer side of the muffler housing as an extension of the cylindrical spark killer screen is an exhaust gas pipe. This pipe is provided with threads and serves as a fastening device with which the spark killer screen and the exhaust gas pipe, as a fire protector, are fixed in position in the wall opening of the muffler housing.

Abstract: A method of transcribing ribonucleic acids of a sample by treating the sample containing ribonucleic acid with a DNA digesting enzyme in the presence of Mn.sup.2+ ions followed by transcribing the ribonucleic acids into deoxyribonucleic acids and suitable reagents.

Abstract: Biodegradable polyesters based onA) 95-99.99 mol % of at least one polyester A containing as monomeric building blocks of an acid component comprisinga.sub.11) 20-95 mol % of at least one aliphatic or cycloaliphatic dicarboxylic acid or its ester-forming derivative anda.sub.12) 5-80 mol % of at least one aromatic dicarboxylic acid or its ester-forming derivative andat least one dihydroxy compound or at least one amino alcohol or their mixtures, andB) 0.01-5 mol % of a mixture comprising mono-, bi-, tri-, tetra- and higher-nuclear isocyanurates or corresponding compounds containing two, three or four functional groups capable of reacting with the end groups of polyester A, or mixtures of the isocyanurates and the corresponding compounds,as well as molding compositions comprising said polyesters, their manufacture and their use in the manufacture of moldings, filsm, fibers and coatings.

Abstract: Biodegradable polyesters P1 obtainable by reaction of a mixture consisting essentially of(a1) a mixture consisting essentially offrom 35 to 95 mol % of adipic acid or ester-forming derivatives thereof or mixtures thereof,from 5 to 65 mol % of terephthalic acid or ester-forming derivatives thereof or mixtures thereof, andfrom 0 to 5 mol % of a sulfonate compound,the sum of the individual mole percentages being 100 mol %, and(a2) a dihydroxy compound selected from the group consisting of C.sub.2 -C.sub.6 -alkanediols and C.sub.5 -C.sub.10 -cycloalkanediols,the molar ratio of (a1) to (a2) being chosen within the range from 0.4:1 to 1.5:1,with the proviso that the polyesters P1 have a molecular weight (M.sub.n) within the range from 5000 to 50,000 g/mol, a viscosity number within the range from 30 to 350 g/ml (measured in 50:50 w/w dichlorobenzene/phenol at a concentration of 0.5% by weight of polyester P1 at 25.degree. C.) and a melting point within the range from 50 to 170.degree. C.

Abstract: The invention relates to a portable handheld blower/vacuum apparatus having a housing and a blower scroll formed in the housing. An impeller is provided in the blower scroll. Air is supplied to the blower scroll via an air inlet and air is directed away from the blower scroll via an air outlet. An air-conducting connecting tube is mounted on the air outlet via a housing-fixed connecting stub. A bayonet connection is provided in the overlap region between the connecting tube and the connecting stub. The bayonet connection includes a guide path lying in the overlap region. The guide path includes an axial segment and a peripheral segment connected thereto in which a radial cam of the other part engages. The cam is secured form tight by a latch connection in the peripheral segment of the guide path to ensure a reliable, mechanically loadable attachment of the connecting tube in the connecting stub.

Abstract: Biodegradable polyesteramides as defined in the specification obtained by reacting a mixture consisting essentially of(a1) from 95 to 99.9% by weight of a polyesteramide,(a2) from 0.1 to 5% by weight of a divinyl ether, and(a3) from 0 to 5 mol % of compound D as defined in the specification, and other biodegradable polymers and thermoplastic molding compositions, processes for the preparation thereof, the use thereof for producing biodegradable moldings, and adhesives, biodegradable moldings obtained from the polymers and molding compositions according to the invention.

Abstract: A sensor subassembly contains a base part that is formed of plastic and has a sensor holding region with sensor connections provided therein and a connection region with plug connections provided therein. A sensor element with electrical contacts is electrically conductively connected to the sensor connections. Fastened to the base part is a printed circuit board, via which an electrical connection between the sensor element and the plug connections is made.

Abstract: The electrical connector has a basic body, at least one contact element inserted into the basic body, and a contact-ensuring slide. The slide is brought into engagement with the basic body and, when it is properly engaged, the contact element is ensured not to be displaced from its proper position in the basic body. The basic body and the contact-ensuring slide are formed with guide elements for specifically guiding the basic body and the contact-ensuring slide when the latter two are brought into engagement. Latching elements latch the basic body and the contact-ensuring slide. The guide elements and the latching elements of the electrical connector are spatially separated from one another.

Abstract: There is proposed a circuit for operation of at least one relay having an OFF-position and an ON-position, wherein the relay assumes the OFF-position in the event of a component failure of any element of the circuit. In the ON-position of the relay a capacitor, the relay and a voltage source are switched in a predetermined cycle in such a way that in a first time interval of the cycle the voltage source delivers a current which flows through the relay and partially charges up the capacitor and that in a second time interval of the cycle the capacitor delivers the current which flows through the relay, with the capacitor being partially discharged again.

Abstract: Thermoplastic molding materials contain, as essential components,A) from 95 to 99.99% by weight of an ethylene polymer andB) from 0.01 to 5% by weight of a thermoplastic polyester having a maximum melting point of less than or equal to 150.degree. C.

Abstract: Biodegradable polyesters P1 obtainable by reaction of a mixture consisting essentially of(a1) a mixture consisting essentially offrom 35 to 95 mol % of adipic acid or ester-forming derivatives thereof or mixtures thereof,from 5 to 65 mol % of terephthalic acid or ester-forming derivatives thereof or mixtures thereof, andfrom 0 to 5 mol % of a sulfonate compound, the sum of the individual mole percentages being 100 mol %, and(a2) a dihydroxy compound selected from the group consisting of C.sub.2 -C.sub.6 -alkanediols and C.sub.5 -C.sub.10 -cycloalkanediols,the molar ratio of (a1) to (a2) being chosen within the range from 0.4:1 to 1.5:1,with the proviso that the polyesters P1 have a molecular weight (M.sub.n) within the range from 5000 to 50,000 g/mol, a viscosity number within the range from 30 to 350 g/ml (measured in 50:50 w/w o-dichlorobenzene/phenol at a concentration of 0.5% by weight of polyester P1 at 25.degree. C.) and a melting point within the range from 50 to 170.degree. C.

Abstract: Biodegradable polymers comprising a polyether ester P1 obtained by reactinga first mixture of20-95 mol% of adipic acid or ester-forming derivatives thereof or mixtures thereof,5-80 mol% of terephthalic acid or ester-forming derivatives thereof or mixtures thereof, and0-5 mol% of a compound containing sulfonate groups,and a second mixture of15-99.8 mol% of a dihydroxy compound selected from the group consisting of C.sub.2 -C.sub.6 -alkanediols and C.sub.5 -C.sub.10 -cycloalkanediols,85-0.2 mol% of a dihydroxy compound IHO--?(CH.sub.2).sub.n --O!.sub.m --H(n=2, 3 or 4, m=2-250)with0-5 mol%, based on the first mixture, of a compound D having at least three groups capable of ester formation,and a bisoxazoline C1, their preparation and their use in the manufacture of biodegradable molding materials.

Abstract: An adjustable-length gas spring comprises a housing and a piston rod led out of the latter, on which a piston is disposed, dividing the housing into two partial housing chambers. Provision is made for a valve for the partial housing chambers to be connected with each other, the valve comprising a valve-operating lever, which is arranged pivotably at right angles to its longitudinal direction and a valve seat of which, when the lever is pivoted out of a position of rest into a position of opening of the valve, can be lifted off a seal, while forming a gap that connects the partial housing chambers with each other.

Abstract: Biodegradable polyesters having a molecular weight (M.sub.n) of from 5000 to 50,000 g/mol (measured by gel permeation chromatography), a viscosity number of from 30 to 350 g/ml (measured in 50:50 by weight of o-dichlorobenzene/phenol at a concentration of 0.5% by weight of polyester at 25.degree. C.), and a melting point of from 50 to 170.degree. C., and having both hydroxyl and carboxyl end groups, the molar ratio of carboxyl end groups to hydroxyl end groups being greater than one, which is obtained by reacting a mixture consisting essentially ofa.sub.1) a mixture consisting essentially offrom 45 to 80 mol % of adipic acid or ester-forming derivatives thereof, or mixtures thereof,from 20 to 55 mol % of terephthalic acid or ester-forming derivatives thereof, or mixtures thereof, andfrom 0 to 5 mol % of a sulfonate compound,where the sum of the individual mole percentages is 100 mol %, anda.sub.2) a dihydroxy compound selected from the group consisting of C.sub.2 -C.sub.6 -alkanediols and C.sub.5 -C.sub.

Abstract: Biodegradable polyetheresteramides P1 which are obtained by reacting(a1) a mixture containing20-95 mol % of adipic acid or ester-forming derivatives thereof or mixtures thereof and5-80 mol % of terephthalic acid or ester-forming derivatives thereof or mixtures thereof, and(a2) a mixture of dihydroxy compounds(a21) from 15 to 99.3 mol % of a dihydroxy compound selected from the group consisting of C.sub.2 -C.sub.6 -alkanediols and C.sub.5 -C.sub.10 -cycloalkanediols,(a22) from 0.2 to 85 mol % of a dihydroxy compound containing ether functionalities of the formula IHO--((CH.sub.2).sub.n --O).sub.m --H Iwhere n is 2, 3 or 4 and m is an integer from 2 to 250, or mixtures thereof and(a23) from 0.5 to 80 mol % of an amino-C.sub.2 -C.sub.12 -alkanol or amino-C.sub.5 -C.sub.10 -cycloalkanol,where the molar ratio of (a1) to (a2) is from 0.4:1 to 1.5:1, with the proviso, inter alia, that the polyetheresteramides P1 have a molecular weight (M.sub.

Abstract: A waterproof housing with a plug-and-socket connection for protecting electronic circuits includes a hard plastic upper part and a hard plastic lower part. A soft plastic extruded seal is disposed between the upper part and the lower part. A plug part is constructed in one piece with the upper or lower part. The plug part has a hard plastic inner part containing contact pins and a soft plastic sealing collar surrounding the inner part.

Abstract: A control assembly for a passenger protection system of a vehicle which is tripped upon the occurrence of a side impact traffic accident. The control assembly has at least one detector adapted to detect a pressure rise in a hollow body. The at least one detector is mounted in a largely enclosed side portion on the side of the vehicle body defining a hollow body such as a door. A control unit is connected to and receives signals from the at least one detector. The control unit evaluates a sudden and largely adiabatic air pressure rise detected by the detector upon a side impact collision and determines whether to actuate a passenger protection system such as an air bag.

Abstract: A fluid-filled unit of a cylinder and a piston rod, in particular a gas spring, has a housing, which has an end closed by a plug. A ball socket of a ball-and-socket joint is formed in this plug. The design may additionally be such that the filling with compressed gas of the housing takes place in the vicinity of the plug.