Refine
Year of publication
- 2013 (171) (remove)
Institute
- Fachbereich Medizintechnik und Technomathematik (53)
- INB - Institut für Nano- und Biotechnologien (35)
- Fachbereich Elektrotechnik und Informationstechnik (29)
- Fachbereich Chemie und Biotechnologie (26)
- IfB - Institut für Bioengineering (23)
- Fachbereich Energietechnik (14)
- Fachbereich Luft- und Raumfahrttechnik (14)
- Fachbereich Wirtschaftswissenschaften (12)
- Fachbereich Bauingenieurwesen (9)
- Fachbereich Maschinenbau und Mechatronik (6)
Has Fulltext
- no (171) (remove)
Language
- English (171) (remove)
Document Type
- Article (96)
- Conference Proceeding (55)
- Part of a Book (7)
- Doctoral Thesis (4)
- Book (2)
- Other (2)
- Patent (2)
- Report (2)
- Conference: Meeting Abstract (1)
Keywords
- industrial research (2)
- metal structure (2)
- steel (2)
- Bacillus atrophaeus (1)
- Business Models (1)
- IT Products (1)
- Product Management (1)
- Strategic Business Planning (1)
- building materials (1)
- building safety (1)
- building technique (1)
- calorimetric gas sensor (1)
- calorimetric gas sensor;hydrogen peroxide;wireless sensor system (1)
- energy efficiency (1)
- hydrogen peroxide (1)
- iron and steel industry (1)
- materials technology (1)
- research report (1)
- sterilisation (1)
- testing (1)
- thermal insulation (1)
We have developed a double-tuned ¹H/¹⁹F birdcage resonator dedicated for hand and wrist imaging at 7 T to locally image non-steroidal anti-inflammatory drugs (NSAID) such as 2-{[3-(Trifluoromethyl) phenyl]amino}benzoic acid. The preliminary in vivo images acquired by the double-tuned ¹H/¹⁹F birdcage resonator demonstrate the feasibility for ¹H/¹⁹F hand- and wrist-imaging at 7 T. While the diagnostic quality of the coil needs to be assessed in patients with inflammatory rheumatoid disease, first ¹⁹F images of the NSAID are encouraging, and point towards the prospect of applying ¹⁹F-MRI to visualize and quantify the concentration of therapeutically-active compound at the sites of inflammation.
Semiconductor-based chemical imaging sensors, like the light-addressable potentiometric sensor (LAPS) or the pH-imaging sensor based on a charge-coupled device (CCD), are becoming a powerful tool for label-free imaging of biological phenomena. We have proposed a polyion-based enzymatic membrane to develop an acetylcholine (ACh) imaging sensor for neural cell-activity observations. In this study, a CCD-type ACh-imaging sensor and a LAPS-type ACh-imaging sensor were fabricated and the prospect of both sensors was clarified by making a comparison of their basic characteristics.
Light-addressable potentiometric sensors (LAPS) are semiconductor-based potentiometric sensors, with the advantage to detect the concentration of a chemical species in a liquid solution above the sensor surface in a spatially resolved manner. The addressing is achieved by a modulated and focused light source illuminating the semiconductor and generating a concentration-depending photocurrent. This work introduces a LAPS set-up that is able to monitor the electrical impedance in addition to the photocurrent. The impedance spectra of a LAPS structure, with and without illumination, as well as the frequency behaviour of the LAPS measurement are investigated. The measurements are supported by electrical equivalent circuits to explain the impedance and the LAPS-frequency behaviour. The work investigates the influence of different parameters on the frequency behaviour of the LAPS. Furthermore, the phase shift of the photocurrent, the influence of the surface potential as well as the changes of the sensor impedance will be discussed.