TY  - JOUR
A1  - Prochnow, Nora
A1  - Gebing, Tina
A1  - Ladage, Kerstin
A1  - Krause-Finkeldey, Dorothee
A1  - Ourdi, Abessamad El
A1  - Bitz, Andreas
A1  - Streckert, Joachim
A1  - Hansen, Volkert
A1  - Dermietzel, Rolf
T1  - Electromagnetic field effect or simply stress? Effects of UMTS exposure on hippocampal longterm plasticity in the context of procedure related hormone release
JF  - PLoS one
N2  - Harmful effects of electromagnetic fields (EMF) on cognitive and behavioural features of humans and rodents have been controversially discussed and raised persistent concern about adverse effects of EMF on general brain functions. In the present study we applied radio-frequency (RF) signals of the Universal Mobile Telecommunications System (UMTS) to full brain exposed male Wistar rats in order to elaborate putative influences on stress hormone release (corticosteron; CORT and adrenocorticotropic hormone; ACTH) and on hippocampal derived synaptic long-term plasticity (LTP) and depression (LTD) as electrophysiological hallmarks for memory storage and memory consolidation. Exposure was computer controlled providing blind conditions. Nominal brain-averaged specific absorption rates (SAR) as a measure of applied mass-related dissipated RF power were 0, 2, and 10 W/kg over a period of 120 min. Comparison of cage exposed animals revealed, regardless of EMF exposure, significantly increased CORT and ACTH levels which corresponded with generally decreased field potential slopes and amplitudes in hippocampal LTP and LTD. Animals following SAR exposure of 2 W/kg (averaged over the whole brain of 2.3 g tissue mass) did not differ from the sham-exposed group in LTP and LTD experiments. In contrast, a significant reduction in LTP and LTD was observed at the high power rate of SAR (10 W/kg). The results demonstrate that a rate of 2 W/kg displays no adverse impact on LTP and LTD, while 10 W/kg leads to significant effects on the electrophysiological parameters, which can be clearly distinguished from the stress derived background. Our findings suggest that UMTS exposure with SAR in the range of 2 W/kg is not harmful to critical markers for memory storage and memory consolidation, however, an influence of UMTS at high energy absorption rates (10 W/kg) cannot be excluded.
Y1  - 2011
U6  - https://doi.org/10.1371/journal.pone.0019437
VL  - 6
IS  - 5
PB  - PLOS
CY  - San Francisco
ER  - 
TY  - CHAP
A1  - Schopp, Christoph
A1  - Heuermann, Holger
T1  - Electrodeless low pressure lamp with bi-static matching at 2.45 GHz
T2  - 2013 European Microwave Conference (EuMC) , Nuremberg
Y1  - 2013
SN  - 978-1-4799-0264-4
SP  - 881
EP  - 884
PB  - IEEE
CY  - Piscataway, NJ
ER  - 
TY  - JOUR
A1  - Windmüller, Anna
A1  - Schaps, Kristian
A1  - Zantis, Frederik
A1  - Domgans, Anna
A1  - Taklu, Bereket Woldegbreal
A1  - Yang, Tingting
A1  - Tsai, Chih-Long
A1  - Schierholz, Roland
A1  - Yu, Shicheng
A1  - Kungl, Hans
A1  - Tempel, Hermann
A1  - Dunin-Borkowski, Rafal E.
A1  - Hüning, Felix
A1  - Hwang, Bing Joe
A1  - Eichel, Rüdiger-A.
T1  - Electrochemical activation of LiGaO2: implications for ga-doped garnet solid electrolytes in li-metal batteries
JF  - ACS Applied Materials & Interfaces
N2  - Ga-doped Li7La3Zr2O12 garnet solid electrolytes exhibit the highest Li-ion conductivities among the oxide-type garnet-structured solid electrolytes, but instabilities toward Li metal hamper their practical application. The instabilities have been assigned to direct chemical reactions between LiGaO2 coexisting phases and Li metal by several groups previously. Yet, the understanding of the role of LiGaO2 in the electrochemical cell and its electrochemical properties is still lacking. Here, we are investigating the electrochemical properties of LiGaO2 through electrochemical tests in galvanostatic cells versus Li metal and complementary ex situ studies via confocal Raman microscopy, quantitative phase analysis based on powder X-ray diffraction, energy-dispersive X-ray spectroscopy, X-ray photoelectron spectroscopy, and electron energy loss spectroscopy. The results demonstrate considerable and surprising electrochemical activity, with high reversibility. A three-stage reaction mechanism is derived, including reversible electrochemical reactions that lead to the formation of highly electronically conducting products. The results have considerable implications for the use of Ga-doped Li7La3Zr2O12 electrolytes in all-solid-state Li-metal battery applications and raise the need for advanced materials engineering to realize Ga-doped Li7La3Zr2O12for practical use.
KW  - LiGaO2
KW  - garnet solid electrolyte
KW  - ga-doping
KW  - Li7La3Zr2O12
KW  - solid-state battery
Y1  - 2024
U6  - https://doi.org/10.1021/acsami.4c03729
SN  - 39181–3919
VL  - 16
IS  - 30
PB  - ACS Publications
CY  - Washington, DC
ER  - 
TY  - CHAP
A1  - Niendorf, Thoralf
A1  - Winter, Lukas
A1  - Frauenrath, Tobias
ED  - Millis, Richard
T1  - Electrocardiogram in an MRI environment: Clinical needs, practical considerations, safety implications, technical solutions and fFuture directions
T2  - Advances in Electrocardiograms - Methods and Analysis
Y1  - 2012
SN  - 978-953-307-923-3 (print)
SN  - 978-953-51-6762-4 (eBook)
U6  - https://doi.org/10.5772/24340
SP  - 309
EP  - 324
PB  - IntechOpen
CY  - London
ER  - 
TY  - JOUR
A1  - Heuermann, Holger
A1  - Sadeghfam, Arash
T1  - Electrically tunable bandpass filter with integrated carrier suppression for UHF RFID systems / Sadeghfam, Arash ; Heuermann, Holger
JF  - European Microwave Conference, 2008, EuMC 2008, 38th
Y1  - 2008
SN  - 978-2-87487-006-4
SP  - 1727
EP  - 1730
ER  - 
TY  - JOUR
A1  - Heuermann, Holger
A1  - Sadeghfam, Arash
T1  - Electrically tunable bandpass filter with integrated carrier suppression for UHF RFID systems / Sadeghfam, Arash ; Heuermann, Holger
JF  - European Conference on Wireless Technology, 2008. EuWiT 2008.
Y1  - 2008
SN  - 978-2-87487-008-8
SP  - 306
EP  - 309
ER  - 
TY  - JOUR
A1  - Hagemann, Hans-Jürgen
T1  - Electrical properties of acceptor-doped BaTiO3 ceramic. Hagemann, H. J.
JF  - Berichte der Deutschen Keramischen Gesellschaft. 55 (1978)
Y1  - 1978
SN  - 0365-9542
SP  - 353
EP  - 355
ER  - 
TY  - JOUR
A1  - Prume, Klaus
T1  - Electrical and electromechanical characterization of piezoelectric thin films in view of MEMS application  /  Tiedke, S. ; Prume, K. ; Schmitz-Kempen, T.;
Y1  - 2007
N1  - ISAF 2007. Sixteenth IEEE International Symposium on  Applications of Ferroelectrics, 2007
SP  - 702
ER  - 
TY  - CHAP
A1  - Bitz, Andreas
A1  - El Ouardi, A.
A1  - Streckert, J.
A1  - Hansen, V.
T1  - Efficient calculation of human exposure in front of base station antennas by a combination of the FDTD and Hybrid(2)-method
T2  - Proceedings of the 16th International Zurich Symposium on Electromagnetic Compatibility, Topical Meeting on Biomedical EMC, Zurich, Switzerland, February 2005
Y1  - 2005
SN  - 3-9521199-9-7
SP  - 115
EP  - 118
PB  - ETH Zentrum
CY  - Zürich
ER  - 
TY  - JOUR
A1  - Franke, Helmut
A1  - Streckert, Joachim
A1  - Bitz, Andreas
A1  - Goeke, Johannes
A1  - Hansen, Volkert
A1  - Ringelstein, E. Bernd
A1  - Nattkämper, Heiner
A1  - Galle, Hans-Joachim
A1  - Stögbauer, Florian
T1  - Effects of Universal Mobile Telecommunications System (UMTS) electromagnetic fields on the blood-brain barrier in vitro
JF  - Radiation Research
Y1  - 2005
U6  - https://doi.org/10.1667/RR3424.1
SN  - 1938-5404
VL  - 164
IS  - 3
SP  - 258
EP  - 269
ER  -