摘要:
The invention describes a membrane and a method of making and using the same, the membrane being made from a microporous membrane body with an affinity ligand capable of interacting with at least one type of biomolecule found in a fluid, whereby the membrane body may be stored in a dried state yet retain the activity of the affinity ligand.
摘要:
A force sensor with two force input elements to which the force to be measured and the support force are applied. The two force input elements are substantially rotationally symmetrical and are axially spaced apart, and the force to be measured and the support force are applied in a radial direction. A spring element, arranged axially between the two force input elements connects these elements and its load-dependent deformation is converted into an electrical signal. A substantially tubular cover connected to one of the two force input elements surrounds the spring element. The cover surrounds a portion of the other force input element, forming a circumferential gap. The cover has an inwardly projecting constriction that is spaced apart by a small axial distance from an opposite shoulder on the other force input element.
摘要:
Device and method for sterility testing, in particular of pharmaceutical products, includes a closed sterility test system having at least two test containers, in each case having an integrated test filter, an outlet connecting branch arranged below the test filter and an inlet connecting branch which is arranged above the test filter and can be connected with a tube connection via a sampling device to a sample container. The tube connection of the test container in each case has a distributing component via which a fixed tube connection to an associated nutrient medium container is formed and can be used to feed an associated nutrient medium to the test container.
摘要:
A filter dispenser for the storage and dispensation of individual flat filter sections. The filter dispenser includes a storage compartment with a slot shaped exit for a tube-like band, composed of two parts, and guides in proximity to the slot for the running through of the band parts. The two parts of the band are joined by continuous and releasable edges and cross connections which form pockets which seat filter sections. Upon simultaneous drawing of the parts of the band through the guides, the connections of the band between the guides and the storage compartment are broken and the encapsulated filter sections are released for removal.
摘要:
The invention relates to an electronic balance for use in an explosive environment. The invention calls for an intrinsically safe cable (1) which contains data lines in addition to the voltage supply lines. The data is serially transferred on the data lines. A first conversion unit is housed in the housing of a power pack which conversion unit receives the data arriving serially via the cable (1), converts it into parallel data and stores it so that it can be passed on in a parallel and asynchronous manner in the non-explosive area, that a second conversion unit is housed in the housing of the power pack which second conversion unit stores the data arriving in parallel manner from the non-explosive area, converts it into serial data and sends it serially via the cable (1) into the explosive area, and that the control unit (3) also contains at least a first conversion unit which receives the data arriving serially via the cable (1), converts it into parallel data, stores it and passes it on in parallel manner to the evaluation unit. The control unit contains at least one second conversion unit which stores the data arriving in parallel manner from the evaluation unit, converts it into serial data and sends it serially via the cable (1).
摘要:
A toploaded balance in accordance with the principle of the electromagnetic compensation of force with a divided upper guide rod (3, 3') and a divided lower guide rod (4, 4') which together as a parallel guide connect a load receiver (2) to a system carrier (1) fixed to the housing, which system carrier (1), load receiver (2) and guide rods (3, 3', 4, 4') form a one-piece base, with a translation lever (5) rotatably mounted by two flexible articulations (7) on the system carrier (1), with a coupling element (12) connected by flexible articulations on the one hand to the load receiver (2) and on the other hand to the short lever arm of the translation lever (5), with a magnet build, as viewed from above, into the free space between the parts of the guide rods (3, 3', 4, 4') and their extensions on the system-carrier side and with a coil fastened on the longer lever arm of the translation lever (5) and extending into the air gap of the magnet, the translation lever (5), the two flexible articulations (7) for mounting the translation lever (5) and the coupling element (12) with its flexible articulations (13, 14) are also a one-piece component of the base. In this manner errors by screwing the flexible articulations (7) and warping and non-reproducible return forces from other screw connections can be avoided.
摘要:
A lop loaded balance with a load receiver (1, 2, 3) connected by at least one upper (11) and at least one lower guide rod in the form of a parallel guide to a system carrier (4) fixed to the housing, which load receiver, guide rods and system carrier are manufactured from one piece. The system carrier (4, 5, 6, 7) is designed as a frame. The frame-like system carrier is completely surrounded by a second frame (14, 15, 16, 17) supported on the balance feet and that both frames are constructed in a one-piece manner and are connected to one another in such a manner that twistings of the one frame are transferred as little as possible onto the other frame.
摘要:
A dead-end filtration unit without a housing comprising at least one filter cassette, each cassette comprising a plurality of laminar sections of porous adsorptive membrane, which have been rendered fluid-impermeable on their peripheries, the cassettes being sealingly compressed between two filter retainers fitted with feed inlet and permeate outlet and wherein the laminar sections are made of the same or different membrane adsorber types.
摘要:
There is disclosed a filtration unit for the selective separation of substances from fluids by membrane adsorbers, comprising a plurality of filtration chambers arranged in parallel and using membrane adsorber packs having a variable number of porous laminar sections, and wherein at each membrane adsorber pack, the same pressure drop is maintained between feed and permeate.
摘要:
There is disclosed a method for grafting unsaturated monomers to nitrogen-containing polymers in an aqueous environment and in the presence of carbon tetrachloride and certain reducing agents.