Zobrazeno 1 - 10
of 80
pro vyhledávání: '"Ewald Benes"'
Publikováno v:
The Journal of the Acoustical Society of America. 153:1733-1753
Multilayer piezoelectric transducers and resonators are widely used for generating propagating and standing acoustic waves as well as for sensor devices. More recently, layered piezoelectric structures based on thin film technology became increasingl
Publikováno v:
Physics Procedia. 70:236-240
Resonant piezoelectric sensors based on bulk acoustic wave (BAW) thickness shear resonators are promising for the inline measurement of fluid viscosity, e.g., in industrial processes. The sensor response function can be derived from the general rigor
Autor:
Peter A. Lewin, Lawrence A. Crum, Toni Sliwinski, Ewald Benes, Wolfgang Sachse, Juan A. Gallego-Juárez, Luis Gaete-Garreton
Publikováno v:
Ultrasonics. 87:A1-A2
Autor:
Ivanka Stoineva, Ewald Benes, Victor Wray, George Comanescu, Dirk Develter, Stefan Radel, Siegmund Lang, Olof Palme
Publikováno v:
European Journal of Lipid Science and Technology. 112:663-673
The yeast Candida bombicola ATCC 22214 is well-known to produce mixtures of glycolipids containing the sugar sophorose, the so-called sophorolipids, especially when cultivated on hydrophobic carbon sources as co-substrates. To improve cultivation eff
Publikováno v:
e & i Elektrotechnik und Informationstechnik. 125:82-85
An ultrasonic standing wave field of 2MHz was used to manipulate yeast cells and theophylline crystals in suspension to control the local concentration of solid material in the focus of a Raman spectroscope to improve the signal quality of such measu
Publikováno v:
e & i Elektrotechnik und Informationstechnik. 125:76-81
An ultrasonic standing wave field of 2 MHz was used to manipulate yeast cells in an on-line flow cell for Fourier transformed mid-infrared spectroscopy (FT-IR) purposes. Results show, that a significant decrease of the undesired formation of biofilms
Publikováno v:
IEEE Sensors Journal. 6:1314-1322
A novel general-purpose online measurement system for the resonant piezoelectric bulk-acoustic-wave sensors is presented. The system supports the various sensor types for the different physical measurands, such as the temperature, humidity, the visco
Publikováno v:
IEEE Sensors Journal. 6:898-905
A novel high-temperature resistant capacitance ultrasonic transducer is presented. It is designed for an ultrasonic transit-time gas flowmeter and meets two main requirements not fulfilled by common piezoelectric transducers: First, a special constru
Publikováno v:
IEEE Sensors Journal. 6:906-915
A technique of using an adaptive pulse repetition frequency (PRF) to operate an ultrasonic contrapropagation transit-time gas flowmeter (UFM) is introduced. This adaptive PRF technique allows transient measurements of hot (up to 450 degC) and pulsati
Publikováno v:
Journal of Microbiological Methods. 60:207-216
Ultrasound microbial cell disrupters operating at around 20 kHz are often physically large and, due to significant heating, can be unsuitable for small sample volumes where biochemical integrity of the extracted product is required. Development of a