TY  - JOUR
A1  - Welden, Melanie
A1  - Poghossian, Arshak
A1  - Vahidpour, Farnoosh
A1  - Wendlandt, Tim
A1  - Keusgen, Michael
A1  - Wege, Christina
A1  - Schöning, Michael Josef
T1  - Towards multi-analyte detection with field-effect capacitors modified with tobacco mosaic virus bioparticles as enzyme nanocarriers
JF  - Biosensors
N2  - Utilizing an appropriate enzyme immobilization strategy is crucial for designing enzyme-based biosensors. Plant virus-like particles represent ideal nanoscaffolds for an extremely dense and precise immobilization of enzymes, due to their regular shape, high surface-to-volume ratio and high density of surface binding sites. In the present work, tobacco mosaic virus (TMV) particles were applied for the co-immobilization of penicillinase and urease onto the gate surface of a field-effect electrolyte-insulator-semiconductor capacitor (EISCAP) with a p-Si-SiO₂-Ta₂O₅ layer structure for the sequential detection of penicillin and urea. The TMV-assisted bi-enzyme EISCAP biosensor exhibited a high urea and penicillin sensitivity of 54 and 85 mV/dec, respectively, in the concentration range of 0.1–3 mM. For comparison, the characteristics of single-enzyme EISCAP biosensors modified with TMV particles immobilized with either penicillinase or urease were also investigated. The surface morphology of the TMV-modified Ta₂O₅-gate was analyzed by scanning electron microscopy. Additionally, the bi-enzyme EISCAP was applied to mimic an XOR (Exclusive OR) enzyme logic gate.
KW  - urease
KW  - enzyme-logic gate
KW  - bi-enzyme biosensor
KW  - capacitive field-effect sensor
KW  - tobacco mosaic virus (TMV)
KW  - penicillinase
Y1  - 2022
U6  - http://dx.doi.org/10.3390/bios12010043
SN  - 2079-6374
N1  - This article belongs to the Special Issue "Biosensors: 10th Anniversary Feature Papers"
VL  - 12
IS  - 1
PB  - MDPI
CY  - Basel
ER  - 
TY  - CHAP
A1  - Weiss, Christian
A1  - Heslenfeld, Jonas
A1  - Saewe, Jasmin Kathrin
A1  - Bremen, Sebastian
A1  - Häfner, Constantin Leon
T1  - Investigation on the influence of powder humidity in Laser Powder Bed Fusion (LPBF)
T2  - Procedia CIRP
N2  - In the Laser Powder Bed Fusion (LPBF) process, parts are built out of metal powder material by exposure of a laser beam. During handling operations of the powder material, several influencing factors can affect the properties of the powder material and therefore directly influence the processability during manufacturing. Contamination by moisture due to handling operations is one of the most critical aspects of powder quality. In order to investigate the influences of powder humidity on LPBF processing, four materials (AlSi10Mg, Ti6Al4V, 316L and IN718) are chosen for this study. The powder material is artificially humidified, subsequently characterized, manufactured into cubic samples in a miniaturized process chamber and analyzed for their relative density. The results indicate that the processability and reproducibility of parts made of AlSi10Mg and Ti6Al4V are susceptible to humidity, while IN718 and 316L are barely influenced.
KW  - LPBF
KW  - Additive Manufacturing
KW  - Powder Material
KW  - Humidity
Y1  - 2022
U6  - http://dx.doi.org/10.1016/j.procir.2022.08.102
SN  - 2212-8271
N1  - Teil der Sonderausgabe: 12th CIRP Conference on Photonic Technologies [LANE 2022]
VL  - 111
SP  - 115
EP  - 120
PB  - Elsevier
CY  - Amsterdam
ER  - 
TY  - CHAP
A1  - Weiss, Alexander
A1  - Abanteriba, Sylvester
A1  - Esch, Thomas
T1  - Investigation of Flow Separation Inside a Conical Rocket Nozzle With the Aid of an Annular Cross Flow
T2  - Proceedings of the ASME/JSME 2007 5th Joint Fluids Engineering Conference. Volume 1: Symposia, Parts A and B
N2  - Flow separation is a phenomenon that occurs in all kinds of supersonic nozzles sometimes during run-up and shut-down operations. Especially in expansion nozzles of rocket engines with large area ratio, flow separation can trigger strong side loads that can damage the structure of the nozzle. The investigation presented in this paper seeks to establish measures that may be applied to alter the point of flow separation. In order to achieve this, a supersonic nozzle was placed at the exit plane of the conical nozzle. This resulted in the generation of cross flow surrounding the core jet flow from the conical nozzle. Due to the entrainment of the gas stream from the conical nozzle the pressure in its exit plane was found to be lower than that of the ambient. A Cold gas instead of hot combustion gases was used as the working fluid. A mathematical simulation of the concept was validated by experiment. Measurements confirmed the simulation results that due to the introduction of a second nozzle the pressure in the separated region of the conical nozzle was significantly reduced. It was also established that the boundary layer separation inside the conical nozzle was delayed thus allowing an increased degree of overexpansion. The condition established by the pressure measurements was also demonstrated qualitatively using transparent nozzle configurations.
Y1  - 2007
SN  - 0-7918-4288-6
U6  - http://dx.doi.org/10.1115/FEDSM2007-37387
N1  - Proceedings of the ASME/JSME 2007 5th Joint Fluids Engineering Conference. Volume 1: Symposia, Parts A and B. San Diego, California, USA. July 30–August 2, 2007
SP  - 1861
EP  - 1871
PB  - American Society of Mechanical Engineers (ASME)
CY  - New York
ER  - 
TY  - CHAP
A1  - Weil, M.
A1  - Poghossian, Arshak
A1  - Schöning, Michael Josef
A1  - Cherstvy, A.
T1  - Electrical monitoring of layer-by-layer adsorption of oppositely charged macromolecules by means of capacitive field-effect devices
Y1  - 2012
SN  - 978-3-9813484-2-2
U6  - http://dx.doi.org/10.5162/IMCS2012/P2.5.2
SP  - 1575
EP  - 1578
ER  - 
TY  - JOUR
A1  - Weigand, Christoph
A1  - Collani, E. v.
A1  - Saniga, E.M.
T1  - Economic Adjustment Design for -Control Charts. E.v.Collani, E.M. Saniga, Ch. Weigand
JF  - IIE Transactions / Institute of Industrial Engineers. 26 (1994), H. 6
Y1  - 1994
SN  - 0569-5554
ER  - 
TY  - JOUR
A1  - Weigand, Christoph
T1  - Optimal Production Schedule for a K Products Single Machine Problem
JF  - Economic Quality Control. 9 (1994)
Y1  - 1994
SN  - 0940-5151
SP  - 91
EP  - 101
ER  - 
TY  - JOUR
A1  - Weigand, Christoph
T1  - A Solution to the Scheduling Problem Taking into Account Quality
JF  - Operations research '91 : extended abstracts of the 16th Symposium on Operations Research held at the University of Trier at September 9 - 11, 1991 / [GMÖOR]. Peter Gritzmann ... (eds.)
Y1  - 1991
SN  - 3790806080
N1  - Symposium on Operations Research ; (16, 1991, Trier)
SP  - 373
EP  - 375
PB  - Physica-Verl.
CY  - Heidelberg
ER  - 
TY  - JOUR
A1  - Weigand, Christoph
T1  - Optimal Adjustment Policies
JF  - Proceedings of the First Umeå-Würzburg Conference in Statistics : Kronlund Conference Center and University of Umeå, September 10 - 14, 1990 / ed. by Kurt Brännäs
Y1  - 1990
SN  - 91-7174-564-5
N1  - Umeå-Würzburg Conference in Statistics <1, 1990>
SP  - 147
EP  - 158
PB  - Univ. of Umeå
CY  - Umeå
ER  - 
TY  - JOUR
A1  - Weigand, Christoph
T1  - Technically Optimal Inspection Policy with Arithmetical Adaption
JF  - IMA Journal of Management Mathematics. 14 (2003), H. 4
Y1  - 2003
SN  - 1471-678X
N1  - weitere ISSN 1471-6798 (E)
SP  - 357
EP  - 371
ER  - 
TY  - JOUR
A1  - Weigand, Christoph
T1  - Economically Optimal Inspection Policy with Geometrical Adaption
JF  - Journal of Applied Statistics. 30 (2003), H. 5
Y1  - 2003
SN  - 0266-4763
N1  - weitere ISSN 1360-0532 (E)
SP  - 555
EP  - 569
ER  - 
TY  - JOUR
A1  - Weigand, Christoph
T1  - Economically Optimal Inspection Policy with Arithmetical Adaption
JF  - Applied stochastic models and data analysis / [10th International Symposium on Applied Stochastic Models and Analysis, June 12-15 2001, Université Technologique de Compiègne] ; editors Gérard Govaert, Jacques Janssen, Nikolaos Limnios.
Y1  - 2001
N1  - ASDMA 2001
SP  - 1010
EP  - 1015
PB  - Université Technologique de Compiègne
CY  - Compiègne
ER  - 
TY  - JOUR
A1  - Weigand, Christoph
T1  - Economically Optimal Adaptive Inspection Policies
JF  - Economic Quality Control. 15 (2000), H. 1/2
Y1  - 2000
SN  - 0940-5151
N1  - Printausgabe vorhanden: 43 Z 711
SP  - 55
EP  - 77
ER  - 
TY  - JOUR
A1  - Weigand, Christoph
T1  - Economic Machine Adjustment in the Case of Product Screening .E.v.Collani, Ch. Weigand
JF  - Statistical Papers. 33 (1992)
Y1  - 1992
SP  - 171
EP  - 184
ER  - 
TY  - JOUR
A1  - Weigand, Christoph
T1  - On the Effects of SPC on Production Time
JF  - Economic Quality Control. 8 (1993)
Y1  - 1993
SN  - 0940-5151
SP  - 23
EP  - 61
ER  - 
TY  - JOUR
A1  - Weigand, Christoph
T1  - A new Approach for Optimal Control of a Production process
JF  - Economic Quality Control. 7 (1992)
Y1  - 1992
SN  - 0940-5151
SP  - 225
EP  - 251
ER  - 
TY  - JOUR
A1  - Weigand, Christoph
T1  - Defining Precisions for Reliable Measurement and Estimation Procedures
JF  - Economic Quality Control. 24 (2009), H. 1
Y1  - 2009
SN  - 0940-5151
SP  - 5
EP  - 33
PB  - De Gruyter
CY  - Berlin
ER  - 
TY  - JOUR
A1  - Weigand, Christoph
T1  - Statistical Tests Based on Reliability and Precision
JF  - Economic Quality Control : EQC ; international journal for quality and reliability
N2  - The construction of a statistical test is investigated which is based only on “reliability” and “precision” as quality criteria. The reliability of a statistical test is quantifiedin a straightforward way by the probability that the decision of the test is correct.  However, the quantification of the precision of a statistical test is not at all evident.  Thereforethe paper presents and discusses several approaches.  Moreover the distinction of “nullhypothesis” and “alternative hypothesis” is not necessary any longer.
Y1  - 2012
U6  - http://dx.doi.org/10.1515/eqc-2012-0002
SN  - 1869-6147
VL  - 27
IS  - 1
SP  - 43
EP  - 64
PB  - De Gruyter
CY  - Berlin
ER  - 
TY  - JOUR
A1  - Wegner, Lena
A1  - von Arx, Georg
A1  - Sass-Klaassen, Ute G. W.
A1  - Eilmann, Britta
T1  - ROXAS – an efficient and accurate tool to detect vessels in diffuse-porous species
JF  - IAWA Journal / International Association of Wood Anatomists
Y1  - 2013
U6  - http://dx.doi.org/10.1163/22941932-00000034
SN  - 0928-1541 (Print)
SN  - 2294-1932 (Online)
VL  - 34
IS  - 4
SP  - 425
EP  - 432
PB  - Brill
CY  - Leiden
ER  - 
TY  - JOUR
A1  - Wegmann, Kilian
A1  - Hackl, Michael
A1  - Staat, Manfred
A1  - Mayer, Katharina
A1  - Müller, Lars-Peter
T1  - Double plate osteosynthesis of proximal ulna fractures: biomechanical and clinical results
JF  - Knee surgery, sports traumatology, arthroscopy
N2  - While plate fixation of proximal ulna fractures might lead to superior clinical results compared to tension band wiring, regular plates represent an established risk factor for wound complications. The olecranon double plates (Medartis, Basel, CH) might decrease complications related to the osteosynthesis because of their low profile and better anatomical fit. This study aimed to evaluate the biomechanical performance and clinical results of the olecranon double plates.
Y1  - 2016
U6  - http://dx.doi.org/10.1007/s00167-016-4079-0
SN  - 0942-2056
VL  - Volume 24
IS  - Supplement 1
SP  - 58
EP  - 59
PB  - Springer
CY  - Berlin
ER  - 
TY  - JOUR
A1  - Weemstra, Monique
A1  - Eilmann, Britta
A1  - Sass-Klaassen, Ute G. W.
A1  - Sterck, Frank J.
T1  - Summer droughts limit tree growth across 10 temperate species on a productive forest site
JF  - Forest Ecology and Management
Y1  - 2013
U6  - http://dx.doi.org/doi:10.1016/j.foreco.2013.06.007
SN  - 0378-1127 (Print)
SN  - 1872-7042  (Online)
VL  - 2013
IS  - 306
SP  - 142
EP  - 149
PB  - Elsevier
CY  - Amsterdam
ER  -