Abstract:
Microporous membranes having positive zeta potentials in alkaline pH are provided by radiation grafting diallyldimethylammonium dimethyl ammonium chloride to the surfaces of a microporous, polyamide membrane using ionizing radiation. The membranes have particular use in microelectronics manufacture where quick rinse up times with ultrapure water are required.
Abstract:
Parenteral emulsion-containing medicament fluid is treated by passing the fluid into a filter assembly (10). The fluid is introduced via the inlet (15) into chamber (16) and the fluid then passes through a fluid filtration element (12) into chamber (23) and passes out of the filter device (10) via outlet (19). Passing the fluid through the filtration element (12) blocks microorganisms and other undesirable substances from passing therethrough. Gas which may be present in the fluid and/or the filter assembly (10) may be passed through gas venting elements (17, 18).
Abstract:
A method is provided for processing donated blood, particularly a platelet-containing solution such as platelet-containing plasma, involving separating blood into a red cell containing sediment layer and a supernatant layer, and passing the supernatant layer through a filter until the filter is blocked, thereby leaving platelets to be harvested. The preferred filter comprises a housing (1) having an inlet (2) and an outlet (3) defining a liquid flow path between the inlet (2) and the outlet (3) and a porous medium (4) having a plurality of zones of progressively increasing density positioned inside the housing (1) across the liquid flow path.
Abstract:
The present invention provides a method of preparing polyarylene sulfide fibers, particularly polyphenylene sulfide fibers, comprising melt blowing a blend of polyarylene sulfide and a polyolefin, wherein the polyolefin is present in the blend in an amount of up to about 40 % by weight of the total blend. The present invention also provides fibers, webs, and other products prepared in accordance with the present inventive method.
Abstract:
Processes and systems for combining multiple units of a biological fluid in independent containers (20) into a single receiving container (22) via a pooling assembly (21) are disclosed. The pooling assembly (21) includes a plurality of conduits (40) that converge into a single conduit (60) at outlet (50). Interposed in the conduit (60) between the outlet (50) and the receiving container (22) may include a gas inlet (30), a drip chamber (31), a leukocyte depletion assembly (32), and a gas outlet (33).
Abstract:
A leukocyte depletion filter assembly and a method for removing leukocytes and other deleterious matter from a biological fluid, the filter assembly comprising a housing (10) having an inlet (11), an outlet (12), a vent (30) and a liquid flow path between the inlet (11) and the outlet (12); and a degassing element (50) communicating with the vent (30) for removing gas from the fluid; and a porous medium (36) positioned in the housing (10) across the fluid flow path, the surface of the porous medium (36) having been modified by exposure to a gas plasma stream.
Abstract:
A system for collecting and processing donated blood comprises a first porous medium interposed between a blood collection bag (11) and a satellite bag (18) and a second porous medium (13) interposed between the blood collection bag and another satellite bag (41). The porous media are leucocyte depletion media. The system may also include one or more of the following: a red cell barrier medium, a separation medium, a gas inlet, and a gas outlet. The system can be used to centrifuge whole blood into one or more components, and includes a means for protecting the system during centrifugation.
Abstract:
A device for processing donated blood comprises a porous medium interposed between the collection bag (11) and a satellite bag (13) into which a component separation by centrifugation can be expressed, the filter element preferably having a CWST of about 70 to about 115 dynes/cm. The porous medium blocks red blood cells, but allows platelets to pass therethrough.