摘要:
A chromatography column cartridge system comprised of an internal pressure-stable precision glass tube which can be filled with adsorbent and an external protection and/or temperature control jacket with column connection parts which can be screwed on. The column connection parts comprise a union nut which is screwed onto the protection and/or temperature control jacket. The union nut contains a milled nut and a plunger which seals the glass tube radially. Feed and discharge lines for the mobile phase pass through the column connection parts.
摘要:
A gearbox arrangement (1), which is arranged in a drive train of a multi-axle land vehicle (2), in particular a commercial vehicle, or a similar means of transportation, wherein at least one of said axles is driven, wherein at least one planetary drive (8) is associated with each of the axle halves (5) of a driven axle. The gearbox arrangement comprises at least one sensor device (7) for detecting a steering manipulation on the vehicle (2) and a control device (6). In order to have a gearbox arrangement (1) available that establishes a reliable, simply designed connection between the drive motor and driven wheels (4) with little effort and enables reliable control of the particular wheels (4) in regard to rotational speed and torque during drive and during deceleration, and thus realizes a controllable rotational speed compensation during cornering and significantly reduces the diameter and the constructed size of the power-split gearbox in particular for vehicles (2) having a high axle torque, the axle halves (5) are driven synchronously without differential and the control device (6) is provided with a hydrostatic device (11) that can be manipulated, by which hydrostatic device each of the wheels (4) rolling without slip maintains its torque.
摘要:
The invention relates to a method for the production of a eukaryotic cell selectable by inactivation or reduction of an endogenous gene function, comprising the steps of (a) introduction of one or more vectors into the cell and (b) expression of a siRNA and preferably shRNA coded by the one or more vectors, directed against an endogenous selectable gene and inactivating same, said siRNA or shRNA being the transcription product of an RNAi selection cassette, the selection cassette comprising a section of at least 19 nucleotides of the transcribed region of the gene, said selection being operatively linked to a promoter and a transcription termination signal. Furthermore, the invention relates to a eukaryotic cell comprising an RNAi selection cassette which is directed against an endogenous selectable gene and inactivates the function of said gene; wherein the RNAi selection cassette comprises a section of the gene with a length of at least 19 nucleotides which is operatively linked to a promoter and a transcription termination signal. Moreover, the invention relates to methods for the production of a transgenic mammal, comprising the steps: (a) injection of the embryonic stem cell according to the invention or of an embryonic stem cell selected according to the method of the invention in blastocysts of a mammal, (b) transfer of the blastocysts into the uterus of a mammal, and (c) carrying the transgenic mammal to full term. Finally, the invention relates to a method for the production of a transgenic plant.
摘要:
The invention relates to compounds of formula (I) Wherein R1, R2, R3, R4 and n are as defined in the specification, to processes for their manufacture, to their use as pharmaceuticals, in diagnosis, as PET ligands and to pharmaceutical or diagnostic compositions comprising such compounds.
摘要:
Silicatein is an enzyme of silicate-forming organisms used for the synthesis of their silicate scaffold. The present invention relates to the use of highly-expressed and highly active recombinant silicatein, silicatein isolated from natural sources after gene induction as well as silicatein-fusion proteins for the synthesis of amorphous silicon dioxide (silicic acids and silicates), siloxanes as well as modification of these compounds and their technical use.
摘要:
A defined determination of the field of view observed through a surgical microscope is made. To achieve this determination, the relative current position of the plane of the field of view to the position of an object detail of interest is detected in a sighting method with the aid of a position detection system operating according to the laser triangulation principle. As soon as the plane of the field of view and the object detail are coincident, then with the aid of detected optical system data, the position of the object detail with reference to the surgical microscope is determined and, with the detected coordinates of the surgical microscope, the position of the field of view is determined in space. The position detecting system required for this purpose operates on an optical basis and can be integrated into the optics of the surgical microscope.
摘要:
An instrument is mounted on a motorized positioning mechanism for providing a contactless guidance of the instrument. A transmitting unit and a receiving unit are arranged in a defined relative position to an operator and the instrument so that an evaluation unit positions the instrument via corresponding control signals with the aid of the registered signals of the receiving unit. A preferred application is the contactless guidance of a surgical microscope which tracks the head movements of the surgeon.
摘要:
The invention relates to a high-precision autofocusing arrangement for a stereomicroscope wherein a bar-shaped marking is projected via a cylinder optic on an object. The imaged bar-shaped marking is at least in one dimension less or equal to the resolution of the viewing beam path. A region of the objective not used optically is selected for projection as the pass-through pupil.
摘要:
Antilock control system wherein pressure at the front and rear axles is controlled in cycles which each include a pressure reduction followed by a build-up of the brake pressure in pulses having holding phases therebetween. When a build-up of brake pressure at the front axle exceeds a predetermined time, the rate of build-up at the rear axle is reduced. The system prevents too much pressure build-up at the rear axle during the dynamic load transfer which occurs when braking a vehicle having a high center of gravity relative to its wheel base.
摘要:
A process and a device for smoothing tubular, extensible material with at least one closed end, especially for shaping stockings or tights, is described, with at least one apparatus to feed in and stretch the material on an elongated stretcher being provided, also with at least one apparatus to heat the material on the stretcher, such that the apparatus for feeding in and stretching the material has a gathering fixture to pre-gather the material and a stretching apparatus that has gripper elements to transfer the gathered-up material from the gathering fixture, that can be moved along the elongated stretcher in order to slip the gathered material onto the stretcher. This arrangement guarantees particularly gentle handling of the material, and uniform stretching on the stretcher.