TY  - JOUR
A1  - Sponagel, Stefan
A1  - Unger, J.
A1  - Spies, K. H.
T1  - Härtebegriff im Zusammenhang mit Vernetzung, Bruchdehnung und Dauerfestigkeit eines Elastomers
JF  - Kautschuk Gummi Kunststoffe. 56 (2003), H. 11
Y1  - 2003
SN  - 0948-3276
SP  - 608
EP  - 613
ER  - 
TY  - JOUR
A1  - Öhlschläger, Peter
A1  - Osen, Wolfram
A1  - Dell, Kerstin
A1  - Faath, Stefan
T1  - Human papillomavirus type 16 L1 capsomeres induce L1-specific cytotoxic T lymphocytes and tumor regression in C57BL/6 mice / Öhlschläger, Peter ; Osen, Wolfram ; Dell, Kerstin ; Faath, Stefan ; Garcea Robert L: ; Jochmus, Ingrid ; Müller, Martin, Pawlita,
JF  - Journal of Virology. 77 (2003), H. 8
Y1  - 2003
SN  - 1098-5514
SP  - 4635
EP  - 4645
ER  - 
TY  - JOUR
A1  - Baroud, G.
A1  - Wu, J.Z.
A1  - Bohner, M
A1  - Sponagel, Stefan
A1  - Steffen, T.
T1  - How to determine the permeability for cement infiltration into osteoporotic cancellous bone
JF  - Medical Engineering & Physics. 25 (2003), H. 4
N2  - Cement augmentation is an emerging surgical procedure in which bone cement is used to infiltrate and reinforce osteoporotic vertebrae. Although this infiltration procedure has been widely applied, it is performed empirically and little is known about the flow characteristics of cement during the injection process. We present a theoretical and experimental approach to investigate the intertrabecular bone permeability during the infiltration procedure. The cement permeability was considered to be dependent on time, bone porosity, and cement viscosity in our analysis. In order to determine the time-dependent permeability, ten cancellous bone cores were harvested from osteoporotic vertebrae, infiltrated with acrylic cement at a constant flow rate, and the pressure drop across the cores during the infiltration was measured. The viscosity dependence of the permeability was determined based on published experimental data. The theoretical model for the permeability as a function of bone porosity and time was then fit to the testing data. Our findings suggest that the intertrabecular bone permeability depends strongly on time. For instance, the initial permeability (60.89 mm4/N.s) reduced to approximately 63% of its original value within 18 seconds. This study is the first to analyze cement flow through osteoporotic bone. The theoretical and experimental models provided in this paper are generic. Thus, they can be used to systematically study and optimize the infiltration process for clinical practice.
KW  - Osteoporose
KW  - Permeabilität
KW  - Viskose Strömung
KW  - Viskosität
KW  - Vertebroplastie
KW  - Cement infiltration
KW  - Vertebroplasty
KW  - Osteoporosis
KW  - Permeability
KW  - Experiment
KW  - Analysis
KW  - Viscous flow
Y1  - 2003
SN  - 1350-4533
SP  - 283
EP  - 288
ER  - 
TY  - JOUR
A1  - Heger, Michael
A1  - Callhoff, Aneta
T1  - Hochschuldidaktische Weiterbildung der Fachhochschulen in Nordrhein-Westfalen
JF  - Hochschuldidaktik in Deutschland / [Red.: Johannes Wildt. Hrsg. von der Arbeitsgemeinschaft für Hochschuldidaktik e.V.]
Y1  - 2003
N1  - DUZ special
SP  - 5
PB  - Raabe
CY  - Bonn
ER  - 
TY  - JOUR
A1  - Bressel, A.
A1  - Schultze, J.W.
A1  - Khan, W.
A1  - Wolfaardt, G. M.
A1  - Rohns, H.-P.
A1  - Irmscher, R.
A1  - Schöning, Michael Josef
T1  - High resolution gravimetric, optical and electrochemical investigations of microbial biofilm formation in aqueous systems
JF  - Electrochimica Acta. 48 (2003), H. 20-22
Y1  - 2003
SN  - 0013-4686
SP  - 3363
EP  - 3372
ER  - 
TY  - JOUR
A1  - Dachwald, Bernd
A1  - Leipold, M.
A1  - Fichtner, H.
T1  - Heliopause Explorer - A Sailcraft Mission to the Outer Boundaries of the Solar System / M. Leipold ; H. Fichtner ; B. Heber  ... B. Dachwald ...
JF  - Proceedings of the Fifth IAA International Conference on Low Cost Planetary Missions : 24 - 26 September 2003, ESTEC, Noordwijk, the Netherlands / [comp. by R. A. Harris]
Y1  - 2003
SN  - 92-9092-853-0
N1  - International Conference on Low Cost Planetary Missions <5, 2003, Noordwijk> ; International Academy of Astronautics ; European Space Research and Technology Centre
SP  - 367
EP  - 375
PB  - ESA
CY  - Noordwijk
ER  - 
TY  - JOUR
A1  - Heuermann, Holger
T1  - GSOLT: the calibration procedure for all multi-port vector network analyzers
JF  - IEEE MTT-S International Microwave Symposium digest : Philadelphia, Pennsylvania, 8 - 13 June 2003 ; [including: 2003 International Microwave Symposium digest, vol. 1-3, RF Integrated Circuit Symposium digest, Automatic RF Techniques Group Symposium digest . Vol. 3
Y1  - 2003
SN  - 0-780-37696-X
N1  - Nebent.: 2003 IEEE MTT-S International Microwave Symposium
SP  - 1815
EP  - 1818
PB  - IEEE
CY  - Piscataway, NJ
ER  - 
TY  - JOUR
A1  - Groß, Rolf Fritz
A1  - Berger, J.
A1  - Groß, H.
T1  - Gebäudeautomation - Betriebsdatenerfassung und Gebäudeleittechnik im Klartext
T1  - Operating data- and facility management in clear
JF  - HLH. Heizung, Lüftung/Klima, Haustechnik
KW  - Heizung
KW  - Lüftung
KW  - Klimatechnik
KW  - Lüftungstechnik
KW  - Haustechnik
Y1  - 2003
SN  - 1436-5103
VL  - 54
IS  - 2
SP  - 81
PB  - Springer
CY  - Düsseldorf
ER  - 
TY  - JOUR
A1  - Poghossian, Arshak
A1  - Yoshinobu, Tatsuo
A1  - Schöning, Michael Josef
T1  - Flow-velocity microsensors based on semiconductor field-effect structures
JF  - Sensors. 3 (2003), H. 7
Y1  - 2003
SN  - 1424-8220
SP  - 202
EP  - 212
ER  - 
TY  - JOUR
A1  - Wang, J.
A1  - Krause, R.
A1  - Block, K.
A1  - Musameh, M.
A1  - Mulchandani, A.
A1  - Schöning, Michael Josef
T1  - Flow injection amperometric detection of OP nerve agents based on organophosphorus-hydrolase biosensor detector
JF  - Biosensors & Bioelectronics. 18 (2003), H. 2-3
Y1  - 2003
SN  - 0956-5663
SP  - 255
EP  - 260
ER  -