Abstract: A syringe for dispensing a multi-component material. The syringe can include a cartridge having a first end and a second end, and respective compartments for components of the multi-component material; a static mixer connected to the first end of the cartridge, the mixer having a dispensing outlet; and a plunger assembly that is movable into the syringe cartridge at the second end to dispense material from the first end. A connection between the static mixer and the first end of the syringe cartridge includes a flow-directing mechanism having a venting position in which the cartridge compartments are cut off from the static mixer and are in communication independently with respective venting outlets, and a dispensing position in which the cartridge compartments are in communication with the static mixer and are cut off from the venting outlets.

Abstract: An optoelectronic semiconductor chip includes an epitaxially grown semiconductor layer sequence based on GaN, InGaN, AlGaN and/or InAlGaN, a p-doped layer sequence, an n-doped layer sequence, an active zone that generates an electromagnetic radiation and is situated between the p-doped layer sequence and the n-doped layer sequence, and at least one AlxGa1-xN-based intermediate layer where 0<x?1, which is situated at a same side of the active zone as the n-doped layer sequence.

Abstract: A package for a dental material comprises a compartment for holding a first substance of the dental material and an open reservoir at least partially formed by a wall of the package. The package is adapted such that the compartment and the reservoir are connectable for fluid communication. The reservoir accommodates a second substance of the dental material retained at a surface of the reservoir wall. The package preferably enables easy mixing of the dental material from the first and second substance, thus preferably facilitate a preparation and use of the dental material.

Abstract: A system comprises an automatic mixing and dispensing device for a dental substance, and a material container. The mixing and dispensing device comprises a reservoir for receiving the dental substance, and first and second pressure plates. The material container has first and second material chambers for containing components of a material. The first and second material chambers have first and second cross-sectional chamber areas. At least one of the first and second cross-sectional chamber areas is smaller than smallest surface area of the first and second pressure plates. The system helps facilitating preparation and handling of dental materials.

Abstract: A mixer for mixing at least two-components of a dental material comprises a mixing rotor with a coupling for coupling with a drive shaft for driving the mixing rotor. Further a device for dispensing at least two components of a dental material comprises a drive shaft for driving a mixing rotor of a mixer. The coupling of the mixer and/or the device comprises at least one guiding ridge which preferably facilitates coupling to the drive shaft.

Abstract: An optoelectronic semiconductor chip has a first semiconductor layer sequence which comprises a multiplicity of microdiodes, and a second semiconductor layer sequence which comprises an active region the first semiconductor layer sequence and the second semiconductor layer sequence are based on a nitride compound semiconductor material, the first semiconductor layer sequence is before the first semiconductor layer sequence in the direction of growth, and the microdiodes form an ESD protection for the active region.

Abstract: An optoelectronic semiconductor chip includes an epitaxially grown semiconductor layer sequence based on GaN, InGaN, AlGaN and/or InAlGaN, a p-doped layer sequence, an n-doped layer sequence, an active zone that generates an electromagnetic radiation and is situated between the p-doped layer sequence and the n-doped layer sequence, and at least one AlxGa 1-xN-based intermediate layer where 0<x?1, which is situated at a same side of the active zone as the n-doped layer sequence.

Abstract: A semiconductor chip includes a semiconductor body with a semiconductor layer sequence. An active region intended for generating radiation is arranged between an n-conductive multilayer structure and a p-conductive semiconductor layer. A doping profile is formed in the n-conductive multilayer structure which includes at least one doping peak.

Abstract: An optoelectronic semiconductor body is provided, which contains a semiconductor material which is composed of a first component and a second component different from the first component. The semiconductor body comprises a quantum well structure, which is arranged between an n-conducting layer (1) and a p-conducting layer (5).

Abstract: A dispenser comprises a body with an outlet, and a closure for the outlet. The closure and the body are pivotally movable relative to each other between an open position in which the outlet is open and a closed position in which the closure closes the outlet. The closure and the body are adapted for locking engagement with each another in the closed position. The closure has a locking member for locking and unlocking the closure and the body in the closed position. A force applied on the locking member for unlocking urges the closure toward the open position. The dispenser preferably facilitates the application of a material to be dispensed to a desired location.

Abstract: A dispensing device for a dental material, comprises a container that has a passageway with a front opening for releasing the dental material, and a rear opening. The device has a first fill opening in the passageway arranged between the rear opening and the front opening. The device further has a second fill opening. The device is adapted to receive a piston in the passageway which is movable between the rear opening and the front opening.