TY  - CHAP
A1  - Pijanowska, Dorota G.
A1  - Remiszewska, Elzbieta
A1  - Pederzolli, Cecilia
A1  - Lunelli, Lorenzo
A1  - Vendano, Michele
A1  - Canteri, Roberto
A1  - Dudzinski, Konrad
A1  - Kruk, Jerzy
A1  - Torbicz, Wladyslaw
T1  - Surface modification for microreactor fabrication
N2  - In this paper, methods of surface modification of different supports, i.e. glass and polymeric beads for enzyme immobilisation are described. The developed method of enzyme immobilisation is based on Schiff’s base formation between the amino groups on the enzyme surface and the aldehyde groups on the chemically modified surface of the supports. The surface of silicon modified by APTS and GOPS with immobilised enzyme was characterised by atomic force microscopy (AFM), time-of-flight secondary ion mass spectroscopy (ToF-SIMS) and infrared spectroscopy (FTIR). The supports with immobilised enzyme (urease) were also tested in combination with microreactors fabricated in silicon and Perspex, operating in a flow-through system. For microreactors filled with urease immobilised on glass beads (Sigma) and on polymeric beads (PAN), a very high and stable signal (pH change) was obtained. The developed method of urease immobilisation can be stated to be very effective.
KW  - Biosensor
KW  - Microreactors
KW  - surface modification
KW  - enzyme immobilisation
KW  - lab-on-a-chip
Y1  - 2006
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:a96-opus-1480
ER  - 
TY  - CHAP
A1  - Bukhari, Syed Faisal Ahmed
A1  - Yang, Wuqiang
T1  - Multi-interface level sensors and new development in monitoring and control of oil separators
N2  - In the oil industry, huge saving may be made if suitable multi-interface level measurement systems are employed for effectively monitoring crude oil separators and efficient control of their operation. A number of techniques, e.g. externally mounted displacers, differential pressure transmitters and capacitance rod devices, have been developed to measure the separation process with gas, oil, water and other components. Because of the unavailability of suitable multi-interface level measurement systems, oil separators are currently operated by the trial-and-error approach. In this paper some conventional techniques, which have been used for level measurement in industry, and new development are discussed.
KW  - Biosensor
KW  - Level sensor
KW  - multi-interface measurement
KW  - electrical capacitance tomography
KW  - ECT
Y1  - 2006
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:a96-opus-1498
ER  - 
TY  - CHAP
A1  - Tymecki, Lukasz
A1  - Glab, Stanislaw
A1  - Koncki, Robert
T1  - Miniaturized, planar ion-selective electrodes fabricated by means of thick-film  technology
N2  - Various planar technologies are employed for developing solid-state sensors having low cost, small size and high reproducibility; thin- and thick-film technologies are most suitable for such productions. Screen-printing is especially suitable due to its simplicity, low-cost, high reproducibility and efficiency in large-scale production. This technology enables the deposition of a thick layer and allows precise pattern control. Moreover, this is a highly economic technology, saving large amounts of the used inks. In the course of repetitions of the film-deposition procedure there is no waste of material due to additivity of this thick-film technology. Finally, the thick films can be easily and quickly deposited on inexpensive substrates. In this contribution, thick-film ion-selective electrodes based on ionophores as well as crystalline ion-selective materials dedicated for potentiometric measurements are demonstrated. Analytical parameters of these sensors are comparable with those reported for conventional potentiometric electrodes. All mentioned thick-film strip electrodes have been totally fabricated in only one, fully automated thickfilm technology, without any additional manual, chemical or electrochemical steps. In all cases simple, inexpensive, commercially available materials, i.e. flexible, plastic substrates and easily cured polymer-based pastes were used.
KW  - Biosensor
KW  - Potentiometry
KW  - thick-film technology
KW  - screen-printing
KW  - ion-selective electrodes
Y1  - 2006
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:a96-opus-1506
ER  -