Refine
Year of publication
- 2007 (170) (remove)
Institute
- Fachbereich Medizintechnik und Technomathematik (46)
- Fachbereich Wirtschaftswissenschaften (28)
- IfB - Institut für Bioengineering (23)
- Fachbereich Elektrotechnik und Informationstechnik (22)
- Fachbereich Bauingenieurwesen (18)
- INB - Institut für Nano- und Biotechnologien (18)
- Fachbereich Luft- und Raumfahrttechnik (15)
- Fachbereich Chemie und Biotechnologie (14)
- Fachbereich Energietechnik (14)
- Fachbereich Maschinenbau und Mechatronik (9)
Has Fulltext
- no (170) (remove)
Document Type
- Article (170) (remove)
Keywords
- debris flow (1)
Media Delivery Based on Service Aware Transport Overlay Networks / Kampmann, Markus ; Hartung, Frank
(2007)
Chain scattering parameters or T-parameters are a useful tool for calculating cascaded two-ports. With the increasing importance of mixed-mode S-parameters, a need for converting the T-parameters from their unbalanced form into a balanced form emerges for suiting both common and differential mode waves, as well as the mode conversion. This paper presents the derivation of the equations for transformations between mixed-mode S- and T-parameters for a mixed-mode two-port. Although derived in a way very similar to monomode T-parameters, no simplifications were necessary. Measurement results exemplify the quality of the T-parameter transformation under real-life conditions.
Beurteilung der Ausbaunotwendigkeit von Eisenbahn-Streckenabschnitten - ein anspruchsloses Verfahren
(2007)
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.