electrode processes on an enzyme embodied electrode

an enzyme embodied electrode (eee) is an electrochemical biosensing device fabricated by direct immobilization of enzyme on a platinized electrode. in order to elucidate the reaction scheme of an eee, the pulse voltammetric technique was employed, in which a potentiostatic pulse was applied after the preoxidation pulse and the following o..

electrodeposition of glucose oxidase for the fabrication of miniature sensors

glucose oxidase enzyme electrodes have been prepared by passing a current through an aqueous solution of glucose oxidase and bovine serum albumin, with the working electrode as anode. these electrodes have been found to be highly active. when subsequently modified with a polypyrrole layer the response to two model interferences, ascorbate..

fabrication of a ph-sensitive microarray electrode and applicability to biosensors

the authors report a reversible conductivity change of polypyrrole with ph of the solution, investigated by an in situ conductivity measurement. a novel enzyme sensor is fabricated by coating the microarray electrode with polypyrrole and penicillinase membranes. the enzyme reaction acidifies the polypyrrole membrane, resulting in the incr..

trends in biosensor research and development

trends in biosensor research and development are described micromachining techniques have been applied to construct biosensor systems. several detection units for flow injection analysis have been fabricated. an electrochemical flow cell was fabricated, and both an enzyme immobilized column and an electrochemical detector was integrated. ..

fourth international meeting on chemical sensors

the following topics were dealt with' gas sensors: biosensors: electric sensors: ph sensors: sensors fabrication: biosensors: humidity sensors: capacitive sensors: o/sub 2/ sensors: zirconia sensors: semiconductor sensors: nh/sub 3/ detection: potentiometric sensors: electrochemical sensors: catalytic gas sensors: amperometric sensors: bi..

mass transfer of an impinging jet confined between parallel plates (jet array processing)

an understanding of the mass transfer behaviour of an impinging jet can be usefully applied to wet chemical processes such as water rinsing, photoresist development, and metal etching or plating. theoretical and experimental methods were used to study the mass transfer characteristics of an axisymmetric impinging jet confined between two ..

mechanical properties of corona-modified cellulose/polyethylene composites

the effect of corona treating the surfaces of components on tensile properties of wood fiber linear low-density polyethylene composites has been investigated. corona treatment results in a significant increase in strength properties of the composites. yield stress increases after treatment of one or both of the composite components. prono..

surface characterization of a-axis euba/sub 2/cu/sub 3/o/sub 7-y/ thin films

the surface characterization of a-axis euba/sub 2/cu/sub 3/o/sub 7-y/ (ebco) films sputtered onto srtio/sub 3/ (001) has been performed with a view to developing fabrication techniques for multilayer devices. scanning electron microscopy (sem) and atomic force microscopy (afm) studies indicate that a-axis ebco films have fairly smooth sur..

tensile failure of composites' influence of interface and matrix yielding

yielding stress of the matrix and interface is chosen to represent the influence of the chemical, mechanical, and thermodynamical nature of the bounding process between matrix and fiber materials. the shear stress-strain behavior of interface and matrix material is modeled as elastic-perfectly plastic. a local stress analysis model is use..

fabrication of grazing incidence optics using flow-polishing techniques

the surface finishing of x-ray grazing incidence optics is the most demanding area of optical processing both in terms of metrology and application of optical finishing techniques. the authors discuss the application of specialized metrology and finishing techniques in producing a low x-ray scatter grazing incidence telescope