capillary membrane reactors: performance and applications

purpose of the work is the characterization of capillary membranes with entrapped cells, from a mechanical and a kinetic point of view. polysulphone capillary membranes have been prepared by the phase inversion technique, extruding in a specially designed apparatus the polymer solution containing lyophilized cells of thermophilic sulfolob..

immobilization of enzymes and antibodies to radiation grafted polymers for therapeutic and diagnostic applications

pre-irradiation and mutual radiation grafting were employed to produce poly(methacrylic acid) (maac) hydrogels on polypropylene/polyethylene (pp/pe) copolymer films, pp films and porous pp fibers of a plasma filter. a diphenyl picryl hydrazyl (dpph) assay was developed to measure the surface peroxide concentration of the pre-irradiated pp..

badania wybranych procesow plazmochemicznych prowadzonych z wykorzystaniem plazmotronow lukowych, indukcyjnych i mikrofalowych $left bracket$ investigations of plasmachemical processes carried out in arc, inductive and microwave plasmatrons $right bracket

some details concerning different plasma reactors construction are given. these reactors were used to investigate chosen plasmachemical processes such as: minerals processing, oxides reduction, coal and methane pyrolysis nitric oxides synthesis, powder spheroidization and glass and polyester fibre surface treatment. the lowest power outla..

portable fiberoptic monitor for fluorimetric bioassays

a simple and portable fiberoptic instrument for fluorimetric bioassays is described. the instrument is designed to be readily adaptable to commercially available biotesting wells on microplates the microwells can also be used as interchangeable sensor heads. the utility of the fiber-optic biosensor is illustrated with a model enzyme-linke..

surface treatment of carbon fibres for resin matrices

in this paper the authors describe the various oxidation treatments of carbon fibres and establish how the changes induced in the surface properties of the filaments are related to their reactivity. the major factors which influence the interactions between carbon fibres and organic resins are reviewed. optimization of the interfacial bon..

action of xylanases on chemical pulp fibers - part ii: enzymatic beating

two chemical bleached pulps were treated with a crude enzyme mixture in the presence of hgcl//2 (1 mm). such treatment inhibited endo-cellulases. xylans were thus subjected to selective in-situ hydrolysis. the enzyme-treated pulps can be compared to slightly beaten pulps. the modified fibers show external fibrillation and reveal strong be..

action of xylanases on chemical pulp fibers - part i: investigations on cell-wall modifications

the action of xylanses on chemical wood pulps was studied in the presence of a 1 mm hgcl//2 solution. in that medium, the endo-cellulases present in the crude enzyme mixture from the basidiomycete sporotrichum dimorphosporum were inhibited as shown by soluble sugar analysis and by molecular weight determination of the carbanilated derivat..

effect of plunger velocity on the quality of castings

gate velocity and cavity fill time are the most important parameters that affect the quality of the castings. an equipment has been fabricated to measure the plunger velocity during casting and the data is used for calculating gate velocity and cavity fill time under these settings, castings were produced to find the effect of these param..

turning frp with syndite-test results

although syndite pcd (polycrystalline diamond) tools are widely used in industry not only for the turning, boring and milling of non-ferrous metals but also for the machining of highly abrasive non-metallics such as fiber reinforced plastics (frp) and laminates, there is little published data on tool-related workpiece quality criteria. in..

operation and pressure distribution of immobilized cell hollow fiber bioreactors

this article provides pertinent pressure-drop data on hollow fiber cartridges which are in flow configurations typical of immobilized cell culture work. the results illuminate operational problems that may arise in the culture of either anchorage dependent or independent cells. possible solutions with crossflow systems are suggested. (edi..