Showing papers by "Münster University of Applied Sciences published in 1995"
TL;DR: The CZE method is a useful alternative to the already established HPLC method and the precision and accuracy are better than 13% at 5 ng/ml, and better than 10% between 10 and 250 ng/ ml.
20 citations
TL;DR: In this article, a transducer concept for miniaturized amperometric sensor arrays is presented, where a KCl-containing electrolyte for oxygen measurements is anchored inside the microcontainments of a silicon chip together with the working and reference electrodes.
Abstract: A new transducer concept for miniaturized amperometric sensor arrays is presented. A KCl-containing electrolyte for oxygen measurements is anchored inside the microcontainments of a silicon chip together with the working and reference electrodes. The fabrication process is planned as a full wafer process for low-cost mass production with a narrow variability. First measurements are presented and the problems and advantages of the containment concept discussed.
14 citations
TL;DR: In this article, the authors presented thermoanalytical features (DTA and TG) for YBa2Cu3O7 − x and showed that deoxidation occurred from about 400°C for the pure substance and that at 1020°C it was decomposed peritectically, forming Y2BaCuO5, which then decomposed similarly at 1247°C to Y2O3.
10 citations
TL;DR: Oleochemistry has developed from "soapboiling" to a part of the chemical industry which requires all elements of chemical engineering and a wide and pretentious area of activities concerning unit operations and reaction technology is offered to the chemical engineer as mentioned in this paper.
Abstract: Oleochemistry – Chemical Products Based On Renewable Raw Materials. Because of the increasing demand of consumers and industry for “green” products, the importance of the oleochemistry will grow in the future. This paper shows that the modern oleochemistry has developed from „soapboiling” to a part of the chemical industry which requires all elements of chemical engineering. A wide and pretentious area of activities concerning unit operations and reaction technology is offered to the chemical engineer. The thermal sensitivity of raw materials and products results in high demands in the production process.
9 citations
01 Jan 1995
TL;DR: The Konzepte soziales Netzwerk und sozialsiale Unterstutzung uben auf Gesundheitswissenschaftler und Epidemiologen seit geraumer Zeit grose Anziehungskraft aus as discussed by the authors.
Abstract: Die Konzepte soziales Netzwerk und soziale Unterstutzung uben auf Gesundheitswissenschaftler und Epidemiologen seit geraumer Zeit grose Anziehungskraft aus. Literaturrecherchen uber einen Zeitraum von zwei Jahrzehnten verzeichnen im internationalen Raum einen grosen Publikationszuwachs (14). Auf gesellschaftspolitisch und wissenschaftlich motivierte Anstose fur diese Forschungsaktivitaten geht Rohrle (26) ein.
6 citations
TL;DR: In this paper, a series of polyurethanes based on diols and isocyanate were analyzed and a correlation exists between some of the thermal degradation parameters obtained from thermogravimetric analysis and OI values.
Abstract: In der vorliegenden Arbeit wurden fur eine Serie von Polyurethanen auf der Basis von Diol und Isocyanat der Sauerstoffindex (SI) gemessen und die thermische Zersetzung mittels thermogravimetrischer Analyse (TG) untersucht. Dabei wurde ein Zusammenhang zwischen einigen Parametern der thermischen Zersetzung und den SI-Werten gefunden. Die Auswertung der experimentellen Ergebnisse zeigte, das die Hohe des Massenverlustes bei 250°C und die SI-Werte direkt proportional zueinander sind. Derselbe Zusammenhang besteht auch zwischen dem Logarithmus der Temperatur bei der maximalen Zersetzungsgeschwindigkeit und den SI-Werten.
In the present work oxygen index (OI) measurements and thermogravimetric analysis (TG) for a series of polyurethanes based on diols and isocyanate were conducted. It was found that a correlation exists between some of the thermal degradation parameters obtained from TG and OI-values. Analysis of experimental results confirms that the amount of mass loss at 250°C is directly proportional to the OI-value. It was also found that the logarithmic temperatures of maximal decomposition rates are directly proportional to the OI-values.
5 citations