Computergestuetztes Energieprojektionsmodell Bremen Beitrag zur Konzeptionalisierung und Programmierung komplexer Simulations- und Entscheidungsmodelle auf der Basis von Tabellenkalkulationssystemen

Available from TIB Hannover: RA 8572(21) / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekSIGLEDEGerman

BizWeb: Kreuzfahrtbuchungen mit Web Services - Projektdokumentation

Das Anwendungsziel war, mit Hilfe von Web Services, eine Kreuzfahrtbuchung in einem SAPSystem zu realisieren. Damit soll die Abfrage nach buchbaren Kreuzfahrten, die Buchung von Kreuzfahrten usw. in einem fiktiven Kreuzfahrtbuchungssystem über ein SAPSystem ermöglicht werden. Hierzu war eine Schnittstelle auf der Basis des Java Connectors zu realisieren. Dazu waren vielfältige Vorarbeiten notwendig, wie: ein Kreuzfahrtbuchungssystem im SAPSystem zu realisieren, das notwendige Datenmodell zu entwickeln, etc

Materialien zur Diskussion um die Unwirtschaftlichkeit des Atomstroms Erwiderung auf eine 'kritische' Rezension zur Studie des Oeko-Instituts 'Das Ende des billigen Atomstroms'. Stellungnahme zur Battelle-Studie. Pressedokumentation

Copy held by FIZ Karlsruhe; available from UB/TIB Hannover / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekSIGLEDEGerman

Ice nucleation in aqueous solutions of short- and long-chain poly(vinyl alcohol) studied with a droplet microfluidics setup

Poly(vinyl alcohol) (PVA) has ice binding and ice nucleating properties. Here, we explore the dependence of the molecular size of PVA on its ice nucleation activity. For this purpose, we studied ice nucleation in aqueous solutions of PVA samples with molar masses ranging from 370 to 145 000 g mol−1, with a particular focus on oligomer samples with low molar mass. The experiments employed a novel microfluidic setup that is a follow-up on the previous WeIzmann Supercooled Droplets Observation on a Microarray (WISDOM) design by Reicher et al. The modified setup introduced and characterized here, termed nanoliter Bielefeld Ice Nucleation ARraY (nanoBINARY), uses droplet microfluidics with droplets (96 ± 4) µm in diameter and a fluorinated continuous oil phase and surfactant. A comparison of homogeneous and heterogeneous ice nucleation data obtained with nanoBINARY to those obtained with WISDOM shows very good agreement, underpinning its ability to study low-temperature ice nucleators as well as homogeneous ice nucleation due to the low background of impurities. The experiments on aqueous PVA solutions revealed that the ice nucleation activity of shorter PVA chains strongly decreases with a decrease in molar mass. While the cumulative number of ice nucleating sites per mass nm of polymers with different molar masses is the same, it becomes smaller for oligomers and completely vanishes for dimer and monomer representatives such as 1,3-butanediol, propan-2-ol, and ethanol, most likely because these molecules become too small to effectively stabilize the critical ice embryo. Overall, our results are consistent with PVA polymers and oligomers acting as heterogeneous ice nucleators

Analytics in Microfluidic Systems

Viefhues M. Analytics in Microfluidic Systems. In: Advances in Biochemical Engineering/Biotechnology. Berlin ; Heidelberg: Springer ; 2020.Microfluidic analysis proved to be very sufficient in supporting biotechnological studies. This is due to the wide range of new analysis methods that provide further insight into biotechnological questions but also to intrinsic advantages of the systems themselves. To name two of them, only very small sample amounts are needed, and the analytics are very fast. In this overview paper, microfluidic analysis methods are introduced with a special focus on electric analysis methods. The aim of this work is to shed light on the special advantages of miniaturized electrical analysis in microfluidics; the main theoretical aspects of the methods are given together with the potential scientific insight that can be gained by the respective methods