Abstract: A screw vacuum pump comprises a housing forming a pumping chamber, wherein the housing is made of aluminum or an aluminum alloy. Further provided are two screw rotors arranged in the pumping chamber, each screw rotor comprising at least one displacer element having a helical recess for forming a plurality of windings, wherein the at least one displacer element is made of aluminum or an aluminum alloy. Between the region in which prevail 5% to 30% of the outlet pressure and a pressure-side end of the rotor (pump outlet), at least six, particularly at least eight, and with particular preference at least ten windings are provided.

Abstract: A dry-compressing vacuum pump, in particular a screw pump, has two rotor elements (14) which are arranged in a pump chamber (12) and which are each carried by a rotor shaft (22). Two shaft ends of the rotor shafts (22) project through a side wall (28) of the pump housing (10). On the two shaft ends (28) there is arranged in each case one toothed belt pulley (38). Furthermore, a drive device and an electric motor for driving the rotor shaft (22) are provided. According to the invention, the rotor shafts (22) are driven by means of a toothed belt (40). To be able to use a toothed belt for drive purposes, a rotational flank clearance between the two rotor elements (14) of greater than ±0.75°, in particular greater than ±1°, is provided.

Abstract: A pump system comprising a vacuum pump and a cooling element connected to said vacuum pump. A coolant feed and a coolant discharge are connected to the cooling element for the purpose of cooling said vacuum pump by virtue of receiving and discharging heat using a coolant. The coolant feed and coolant discharge are connected to a heat exchanger such that heat is transferred from the coolant discharge to said coolant feed.

Abstract: A vacuum pump system comprising a plurality of vacuum pumps which are connected to one another in parallel and are each connected on an inlet side to a chamber, having an outlet line which is connected on the outlet side of the vacuum pumps, and an intermediate line which connects the inlet side of at least one vacuum pump to the outlet line, wherein all the vacuum pumps are connected in parallel during a pumping-out period and at least one of the vacuum pumps is connected in parallel with the other vacuum pumps as a backing pump during an idle period.

Abstract: A mobile system for separating donor blood by gravitational force into erythrocyte concentrate and plasma. The system includes a first bag serving as a reservoir for the blood to be separated and at least a second and third bag for respectively receiving the erythrocyte concentrate and plasma, and also multiple tubes for connecting the flexible bags to a separator module having a separating membrane in the form of a bundle of hollow fibers. This system is divided into at least one first and one second sterilely packaged, individual subsystem. The first subsystem includes the individual bags and associated connection tubes and the second subsystem includes the separator module, and male/female connectors.

Abstract: A method for treating a fluid is provided using a particulate material in the form of a deposited layer having an upstream side and a downstream side wherein a flow of the fluid is directed through the deposited layer from the upstream to the downstream side at a first temperature. The method includes reconditioning the deposited layer and then resuming treatment of the fluid, wherein reconditioning comprises heating the deposited layer to a second temperature; and cooling the deposited layer to a third temperature at an average cooling rate in the range of up to about 20° C./min.

Abstract: A vacuum pump system for evacuating a chamber, in particular a lock or a process chamber, comprises a main vacuum pump preferably configured as a screw pump. An inlet of the main vacuum pump is connected with the chamber to be evacuated. As seen in the feeding direction of the main vacuum pump an auxiliary vacuum pump is arranged which is in particular a Roots pump. An outlet area of the main vacuum pump is connected with a main outlet on the one hand and an inlet of the auxiliary vacuum pump on the other hand. Further, an outlet of the auxiliary vacuum pump is connected with the main outlet.

Abstract: Disclosed is a method of preparing a urolithin, or an intermediate or analog thereof, having a dibenzo[b,d]pyran-6-one core. The method is especially advantageous for the large-scale preparation of urolithins or intermediates or analogs thereof. The method may optionally include the preparation of a urolithin, or an intermediate or analog thereof, as a pharmaceutically acceptable salt.

Abstract: The invention relates to a cable for electrically linking electronic assemblies, components or peripherals of a magnetic resonance apparatus by means of a symmetrical shielded cable which shields a plurality of conductors for a useful signal with respect to influences of an electromagnetic alternating field by means of at least one shielding device. In order to suppress sheath waves, a shielding device comprises at at least one point an interruption which is bridged by an active resistance or a reactance.

Abstract: A measurement bridge circuit includes a first branch and a second branch. The first branch contains a first resistor which is sensitive to measured variables and an invariable resistor connected in series. A first tap point is located between the first resistor and the invariable resistor. The second branch contains a second resistor which is sensitive to measured variables and a variable resistor arrangement connected in series. The variable resistor arrangement includes a first component having an invariable electrical resistance value and a second component having a variable electrical resistance value. The second component is connected in parallel with the first component in order to vary a total electrical resistance value for the variable resistor arrangement. A second tap point is located between the second resistor and the variable resistor arrangement.

Abstract: Disclosed is a method of preparing a urolithin, or an intermediate or analog thereof, having a dibenzo[b,d]pyran-6-one core. The method is especially advantageous for the large-scale preparation of urolithins or intermediates or analogs thereof. The method may optionally include the preparation of a urolithin, or an intermediate or analog thereof, as a pharmaceutically acceptable salt.

Abstract: A solenoid operated locking mechanism for securing a lockable rod to the solenoid locking mechanism. Several ball bearings are inserted or removed from a passageway through which the lockable rod must pass to a locking chamber. The plunger has a configuration of locking flats and recesses to determine whether the ball bearings are disposed in the passageway, which restricts the movement of the locking rod past the ball bearings, or whether the ball bearings are out of the passageway, which allows the lockable rod to enter or be removed from the locking chamber or socket. The position of the plunger is controlled by a pair of springs and the solenoid.

Abstract: A solenoid operated locking mechanism uses a permanent magnet to secure a lockable rod to the solenoid locking mechanism. A solenoid operated plunger determines the location and movement of locking members that extend into a locking chamber, thus controlling the movement of the lockable rod past the locking members. Inserting the lockable rod into the locking mechanism forces the plunger against a spring toward a permanent magnet that holds the plunger in the locked position until an electrical pulse energizes the solenoid which reduces or cancels the permanent magnet's magnetic field and allows the lockable rod to be withdrawn from the locking chamber. The locking mechanism only requires energy to be applied to the solenoid to release the locking rod from the solenoid. The locking mechanism only requires energy to be applied to the solenoid to release the locking rod from the solenoid.

Abstract: Disclosed is a method of preparing a urolithin, or an intermediate or analog thereof, having a dibenzo[b,d]pyran-6-one core. The method is especially advantageous for the large-scale preparation of urolithins or intermediates or analogs thereof. The method may optionally include the preparation of a urolithin, or an intermediate or analog thereof, as a pharmaceutically acceptable salt.

Abstract: A circuit configuration for operating a household device contains a power supply connector, an electrical load that is connected via a power connection cable to the power supply connector, and a controller for an endangering component. The controller is connected via a power connection cable to the power supply connector. A device for switching the controller on and off is arranged between the controller and the power supply connector. Safety equipment for disconnecting the controller from the power supply connector is arranged between the power supply connector and the device for switching. In order to supply the controller with electrical power even when the safety equipment is active, the electrical load is connected between the power supply connector and the safety equipment. A connecting cable is provided that connects the controller via the electrical load to the power supply connector, and in which the device for switching is arranged.

Abstract: The present invention relates to an apparatus of the loop Venturi reactor type for the continuous reaction of liquids with gases, in particular for hydrogenations, oxidations or acetylations, e.g. for the preparation of toluenediamine by hydrogenation of dinitrotoluene, and a process for the continuous reaction of liquid reactants with gaseous reactants in the apparatus. Here, the cooling medium surrounds the tubes of the heat exchanger of the apparatus of the invention whereas the reaction takes place in the tubes.

Abstract: An adjusting device for an optical system has a first slider for a first optical element, which is arranged displaceably along an axial direction, a second slider for a second optical element, which is arranged displaceably along the axial direction, a control cam contour fixed in relation to the axial direction, a coupler between the first slider, the second slider and the cam contour, and a force element to exert force between the first slider and the second slider, so that the coupler is in contact with the first slider at a first point, is in contact with the second slider at a second point and is in contact with the control cam contour at a third point, the coupler including a first lever arm formed between the first and third points, and the coupler including a second lever arm formed between the second and third points.

Abstract: A solenoid operated locking mechanism for securing a lockable rod to the solenoid locking mechanism. Several ball bearings are inserted or removed from a passageway through which the lockable rod must pass to a locking chamber. The plunger has a configuration of locking flats and recesses to determine whether the ball bearings are disposed in the passageway, which restricts the movement of the locking rod past the ball bearings, or whether the ball bearings are out of the passageway, which allows the lockable rod to enter or be removed from the locking chamber or socket. The position of the plunger is controlled by a pair of springs and the solenoid.

Abstract: In general, the subject matter described in this disclosure can be embodied in methods, systems, and program products for generating a display of information regarding passengers of an airplane flight. The method includes displaying a graphical depiction of passenger seats for a particular airplane flight. The method includes identifying that multiple passengers booked to the particular airplane flight have a particular status. The method includes identifying that the multiple passengers that have been identified as having the particular status have been assigned to respective multiple passenger seats. The method includes displaying a graphical indication in association with each of the multiple passenger seats, concurrently with the display of the graphical depiction of the passenger seats.

Abstract: A solenoid operated locking mechanism uses a permanent magnet to secure a lockable rod to the solenoid locking mechanism. A solenoid operated plunger determines the location and movement of locking members that extend into a locking chamber, thus controlling the movement of the lockable rod past the locking members. Inserting the lockable rod into the locking mechanism forces the plunger against a spring toward a permanent magnet that holds the plunger in the locked position until an electrical pulse energizes the solenoid which reduces or cancels the permanent magnet's magnetic field and allows the lockable rod to be withdrawn from the locking chamber. The locking mechanism only requires energy to be applied to the solenoid to release the locking rod from the solenoid. The locking mechanism only requires energy to be applied to the solenoid to release the locking rod from the solenoid.