Wiley
Refine
Year of publication
Document Type
- Article (117)
- Part of a Book (1)
- Conference Proceeding (1)
Keywords
- Anammox (1)
- Bacillaceae (1)
- Bemessung (1)
- Biotechnological application (1)
- Broad pH spectrum (1)
- ES-FEM (1)
- Erdbebeneinwirkung (1)
- FS-FEM (1)
- Mainstream (1)
- Mauerwerksbauten (1)
- Nitrogen removal (1)
- Partial nitritation (1)
- PushoverAnalysen (1)
- S-FEM (1)
- Small Aral Sea (1)
- Subtilases (1)
- Subtilisin (1)
- Verhaltensbeiwerte (1)
- Wastewater (1)
- attitude dynamics (1)
- batteries and fuel cells (1)
- biomechanics (1)
- body imaging at 7 T MRI (1)
- calorimetric gas sensor;hydrogen peroxide;wireless sensor system (1)
- cerebral small vessel disease (1)
- cognitive impairment (1)
- connective tissue (1)
- dialysis (1)
- distorted element (1)
- ecological structure (1)
- elastomers (1)
- electrospinning (1)
- energy transfer (1)
- fibers (1)
- heating system (1)
- irradiation (1)
- mechanical properties (1)
- metagenomics (1)
- microbial diversity (1)
- non-simplex S-FEM elements (1)
- orbit control (1)
- orbital dynamics (1)
- physiology (1)
- porous materials (1)
- programming (1)
- retinal vessels (1)
- rubber (1)
- sailcraft (1)
- shotgun sequencing (1)
- solar sail (1)
- supramolecular structures (1)
- system optimization (1)
- technical operations research (1)
- theory and modeling (1)
- thermal dose (1)
- tissue temperature (1)
- transmit antenna arrays (1)
- ultrasound (1)
Institute
- Fachbereich Medizintechnik und Technomathematik (47)
- INB - Institut für Nano- und Biotechnologien (35)
- Fachbereich Chemie und Biotechnologie (30)
- IfB - Institut für Bioengineering (19)
- Fachbereich Elektrotechnik und Informationstechnik (16)
- Fachbereich Energietechnik (14)
- Fachbereich Bauingenieurwesen (9)
- Fachbereich Luft- und Raumfahrttechnik (3)
- Fachbereich Maschinenbau und Mechatronik (3)
- Fachbereich Wirtschaftswissenschaften (2)
- Nowum-Energy (2)
- Solar-Institut Jülich (2)
- IBB - Institut für Baustoffe und Baukonstruktionen (1)
- Institut fuer Angewandte Polymerchemie (1)
The response of Bacillus licheniformis to heat and ethanol stress and the role of the SigB regulon
(2013)
Sterilisation processes are compulsory in medicine, pharmacy, and food industries to prevent infections of consumers and microbiological contaminations of products. Monitoring the sterilisation by conventional microbiological methods is time- and lab-consuming. To overcome this problem, in this work a novel biosensor has been proposed. The sensor enables a fast method to evaluate sterilisation processes. By means of thin-film technology the sensor's transducer structures in form of IDEs (interdigitated electrodes) have been fabricated on a silicon substrate. Physical characterisation of the developed sensor was done by AFM, SEM, and profilometry. Impedance analyses were conducted for the electrical characterisation. As microbiological layer spores of B. atrophaeus have been immobilised on the sensing structure; spores of this type are a well-known sterilisation test organism. Impedance measurements at a fixed frequency over time were performed to monitor the immobilisation process. A sterilisation process according to aseptic filling machines was applied to demonstrate the sensor functionality. After both, immobilisation and sterilisation, a change in impedance could successfully be detected.
A wireless sensor system based on the industrial ZigBee standard for low-rate wireless networking was developed that enables real-time monitoring of gaseous H2O2 during the package sterilization in aseptic food processes. The sensor system consists of a remote unit connected to a calorimetric gas sensor, which was already established in former works, and an external base unit connected to a laptop computer. The remote unit was built up by an XBee radio frequency (RF) module for data communication and a programmable system-on-chip controller to read out the sensor signal and process the sensor data, whereas the base unit is a second XBee RF module. For the rapid H2O2 detection on various locations inside the package that has to be sterilized, a novel read-out strategy of the calorimetric gas sensor was established, wherein the sensor response is measured within the short sterilization time and correlated with the present H2O2 concentration. In an exemplary measurement application in an aseptic filling machinery, the suitability of the new, wireless sensor system was demonstrated, wherein the influence of the gas velocity on the H2O2 distribution inside a package was determined and verified with microbiological tests.
During the development process of a complex technical product, one widely used and important technique is accelerated testing where the applied stress on a component is chosen to exceed the reference stress, i.e. the stress encountered in field operation, in order to reduce the time to failure. For that, the reference stress has to be known. Since a complex technical product may fail regarding numerous failure modes, stress in general is highly dimensional rather than scalar. In addition, customers use their products individually, i.e. field operation should be described by a distribution rather than by one scalar stress value. In this paper, a way to span the customer usage space is shown. It allows the identification of worst case reference stress profiles in significantly reduced dimensions with minimal loss of information. The application example shows that even for a complex product like a combustion engine, stress information can be compressed significantly. With low measurement effort it turned out that only three reference stress cycles were sufficient to cover a broad range of customer stress variety.