摘要:
Compounds of the formula I, in the form of their racemates, mixtures of stereoisomers or mainly pure stereoisomers in which Y is C1-C4alkylene or —SiR1R2—; X is a carbon atom and A1 and A2 independently of one another are hydrogen, C1-C12alkyl, C2-C12alkenyl, C3-C8cycloalkyl, C3-C8cycloalkenyl, C3-C8cycloalkyl-C1-C4alkyl, C3-C8cycloalkenyl-C1-C4alkyl, C6-C10aryl or C7-C14aralkyl; or X is a silicon atom and A1 and A2 independently of one another are C1-C12alkyl, C3-C8cycloalkyl, C3-C8cycloalkyl-C1-C4alkyl, C6-C10aryl or C7-C14aralkyl; A3 and A4 independently of one another are hydrogen, C1-C12alkyl, C3-C8cycloalkyl, C3-C8-cycloalkyl-C1-C4alkyl, C6-C10aryl or C7-C14aralkyl; and R1 and R2 independently of one another are C1-C6alkyl, cyclohexyl, phenyl or benzyl, are ligands for metal complexes of the eighth sub-group of the Periodic Table of the Elements, which are suitable as catalysts for asymmetric hydrogenations and transfer hydrogenations of prochiral compounds having carbon/carbon or carbon/heteroatom multiple bonds.
摘要:
A method for producing an MWT-PERC solar cell is provided, in which openings in the substrate of the solar cell have contact passages and emitter regions that are present on the back side of the solar cell are completely removed outside the contact passages and a dielectric layer is applied on the back side, whereby a paste, which does not act in an electrically contacting manner opposite the substrate, is used for the contact passages.
摘要:
An unattended sensor is provided for use in a surveillance system. The sensor is generally comprised of: a detector; a signal processor; a radio transceiver; a power source; and a controller which configures the sensor in either a sensor mode or a relay mode. When configured in the sensor mode, the detector and signal processor are operational and the transceiver is non-operational. When configured in the relay mode, the transceiver is operational but the detector and signal processor are non-operational. In an alternative approach, the detector and the signal process may remain operational in the relay mode.
摘要:
A device for damping pressure pulsations, in electronically regulatable vehicle brake systems for damping the pressure pulsations that are caused by pressure generators in a hydraulic circuit connected to it. The device has a housing which encloses a damping chamber and also has at least one hydraulic connection opening into the damping chamber, and a throttle device. The housing and throttle device are embodied as a compact damping unit that can be preassembled, is economical, and can be anchored in only a few work steps to the hydraulic block of an electronically regulatable vehicle brake system.
摘要:
A process for the separation of dimethyl ether and chloromethane in mixturesA process for the separation of dimethyl ether and chloromethane in mixtures by two distillation steps. In the first step, the mixture is subjected to an extractive distillation with water, aqueous salt solutions or organic liquids as extractant, the top product being chloromethane. In the second step, the dimethyl ether is separated from the extractant.
摘要:
A semiconductor and/or integrated circuit is provided having reduced particulate count upon or within the circuit. During power ramp down post etch or deposition, particles which formed within the plasma used to effectuate etch or deposition are gradually swept from the region above the integrated circuit. Plasma, and more specifically, the field which forms the plasma is maintained but at reduced levels to allow gradual reduction of particles through a multitude of steps. The steps culminate in eliminating power to the electrodes and plasma between the electrodes. However, at the time at which power is absent, only a few of the original particles remain in the critical region above the integrated circuit. Residual particles can be removed in a purge step following the successive sequence of ramp down steps. Gap between the electrodes is increased to a final position early in the ramp down sequence so that additional electrode movement does not occur when the field is weakened.
摘要:
A combined drink holder and beach blanket holder. A stake is adapted to be inserted into the sand. A hollow drink holder is mounted on top of the stake. A hook member is mounted on the stake, the hook member being adapted to hold down an edge of a blanket lying on the sand.
摘要:
The invention relates to a fastener driving tool comprising a tank (2) for storing a fluid, in particular liquefied petroleum gas, a combustion chamber (1) connected to the tank (2), wherein the combustion chamber (1) has a movable piston (6) for powering a driving plunger (7), and a metering device (4) arranged between the tank (2) and the combustion chamber (1), wherein the metering device (4) has a movable displacement member (19) for ejecting the fuel out of a metering space (15), wherein the displacement member (19) can be moved by an actuation force from a first power source in a displacement direction against a pressure of the fuel, wherein an additional supporting force from a second power source acts on the displacement member (19).
摘要:
The disclosure generally describes computer-implemented methods, software, and systems for allowing model-based backend services adaptations of business objects. One computer-implemented method includes receiving, at a generic interface associated with at least one backend application, a request for data from a particular backend application, identifying a service for execution associated with the received request based at least in part on the received request, identifying a configuration entry associated with the identified service in a configuration table, where the configuration entry defines a set of access-related information associated with at least one business object associated with the backend application, and requesting data from a business logic layer of the backend application based, at least in part, on the access-related information associated with the at least one business object.
摘要:
The invention relates to an applicator device for applying at least one application agent (10a) to fibrous material, in particular an applicator device for applying an application agent (10a) to hair. Said device comprises a housing unit (11a) that contains at least one depot volume (12a) for storing the application agent(s) (10a) and at least one application volume (13a) that is connected to the depot volume (12a).