TY  - JOUR
A1  - Kappler-Tanudyaya, Nathalie
A1  - Schmitt, Heike
A1  - Tippkötter, Nils
A1  - Meyer, Lina
A1  - Lenzen, Sigurd
A1  - Ulber, Roland
T1  - Combination of biotransformation and chromatography for the isolation and purification of mannoheptulose
JF  - Biotechnology Journal
N2  - Mannoheptulose is a seven-carbon sugar. It is an inhibitor of glucose-induced insulin secretion due to its ability to selectively inhibit the enzyme glucokinase. An improved procedure for mannoheptulose isolation from avocados is described in this study (based upon the original method by La Forge). The study focuses on the combination of biotransformation and downstream processing (preparative chromatography) as an efficient method to produce a pure extract of mannoheptulose. The experiments were divided into two major phases. In the first phase, several methods and parameters were compared to optimize the mannoheptulose extraction with respect to efficiency and purity. In the second phase, a mass balance of mannoheptulose over the whole extraction process was undertaken to estimate the yield and efficiency of the total extraction process. The combination of biotransformation and preparative chromatography allowed the production of a pure mannoheptulose extract. In a biological test, the sugar inhibited the glucokinase enzyme activity efficiently.
Y1  - 2007
U6  - https://doi.org/10.1002/biot.200700004
SN  - 1860-7314
VL  - 2
IS  - 6
SP  - 692
EP  - 699
ER  - 
TY  - CHAP
A1  - Tran, Thanh Ngoc
A1  - Staat, Manfred
A1  - Kreißig, R.
T1  - Finite element shakedown and limit reliability analysis of thin shells
N2  - A procedure for the evaluation of the failure probability of elastic-plastic thin shell structures is presented. The procedure involves a deterministic limit and shakedown analysis for each probabilistic iteration which is based on the kinematical approach and the use the exact Ilyushin yield surface. Based on a direct definition of the limit state function, the non-linear problems may be efficiently solved by using the First and Second Order Reliabiblity Methods (Form/SORM). This direct approach reduces considerably the necessary knowledge of uncertain technological input data, computing costs and the numerical error. In: Computational plasticity / ed. by Eugenio Onate. Dordrecht: Springer 2007. VII, 265 S. (Computational Methods in Applied Sciences ; 7) (COMPLAS IX. Part 1 . International Center for Numerical Methods in Engineering (CIMNE)). ISBN 978-1-402-06576-7  S. 186-189
KW  - Finite-Elemente-Methode
KW  - Limit analysis
KW  - shakedown analysis
KW  - Exact Ilyushin yield surface
KW  - Random variable
KW  - First Order Reliabiblity Method
Y1  - 2007
ER  - 
TY  - JOUR
A1  - Vu, Duc Khoi
A1  - Staat, Manfred
A1  - Tran, Ich Thinh
T1  - Analysis of pressure equipment by application of the primal-dual theory of shakedown
JF  - Communications in Numerical Methods in Engineering. 23 (2007), H. 3
Y1  - 2007
SN  - 1069-8299
SP  - 213
EP  - 225
ER  - 
TY  - CHAP
A1  - Breitbach, Gerd
A1  - Alexopoulos, Spiros
A1  - Hoffschmidt, Bernhard
T1  - Fluid flow in porous ceramic multichannel crossflower filter modules
Y1  - 2007
PB  - COMSOL Inc.
CY  - Burlington, Mass.
ER  - 
TY  - BOOK
A1  - Braun, Carsten
T1  - Ein modulares Verfahren für die numerische aeroelastische Analyse von Luftfahrzeugen
N2  - Aachen, Techn. Hochschule, Diss., 2007
Y1  - 2007
ER  - 
TY  - JOUR
A1  - Tippkötter, Nils
A1  - Roikaew, N.
A1  - Ulber, Roland
T1  - Nitratentfernung aus Molkekonzentrat mit biotechnologischer Regeneration der Abwässer
JF  - Deutsche Milchwirtschaft
Y1  - 2007
SN  - 0012-0480
VL  - 58
IS  - 15
SP  - 540
EP  - 542
ER  - 
TY  - JOUR
A1  - Staat, Manfred
A1  - Vu, Duc-Khoi
T1  - Limit analysis of flaws in pressurized pipes and cylindrical vessels. Part I: Axial defects
JF  - Engineering Fracture Mechanics. 74 (2007), H. 3
Y1  - 2007
SN  - 0013-7944
SP  - 431
EP  - 450
ER  - 
TY  - CHAP
A1  - Gömmel, A.
A1  - Butenweg, Christoph
A1  - Kob, M.
T1  - A fluid-structure interaction model of vocal fold oscillation
T2  - 5th International Workshop on Models and Analysis of Vocal Emissions for Biomedical Applications, MAVEBA 2007
N2  - Since fluid-structure interaction within the finite-element method is state of the art in many engineering fields, this method is used in voice analysis. A quasi two-dimensional model of the vocal folds including the ventricular folds is presented. First results of self-sustained vocal fold oscillation are presented and possibilities as well as limitations are discussed.
KW  - finite element method
KW  - fluid structure interaction
KW  - vocal fold oscillation
Y1  - 2007
SN  - 978-888453674-7
N1  - 5th International Workshop on Models and Analysis of Vocal Emissions for Biomedical Applications, MAVEBA 2007; Florence; Italy; 13 December 2007 through 15 December 2007
SP  - 127
EP  - 128
ER  - 
TY  - JOUR
A1  - Vu, Duc Khoi
A1  - Staat, Manfred
T1  - Shakedown analysis of structures made of materials with temperature-dependent yield stress
JF  - International Journal of Solids and Structures. 44 (2007), H. 13
Y1  - 2007
SN  - 0020-7683
SP  - 4524
EP  - 4540
ER  - 
TY  - JOUR
A1  - Dachwald, Bernd
A1  - Carnelli, I.
A1  - Vasile, M.
T1  - Optimizing low-thrust gravity assist interplanetary trajectories using evolutionary neurocontrollers / I. Carnelli ; B. Dachwald ; M. Vasile
JF  - IEEE Congress on Evolutionary Computation, 2007 : CEC 2007 ; 25 - 28 September 2007, Singapore
Y1  - 2007
SN  - 978-1-424-41339-3
N1  - ISBN 10: 1-424-41339-7 ; IEEE Congress on Evolutionary Computation <2007, Singapore> ; 	Institute of Electrical and Electronics Engineers ; Nebent: CEC 2007 ; Parallel als Online-Ausg. erschienen
SP  - 965
EP  - 972
PB  - IEEE Service Center
CY  - Piscataway, NJ
ER  -