Daniel Hechler / Axel Philipps (Hrsg.): Widerstand denken. Michel Foucault und die Grenzen der Macht. Bielefeld: transcript 2008 (279 S.) [Rezension]

Rezension von: Daniel Hechler / Axel Philipps (Hrsg.): Widerstand denken. Michel Foucault und die Grenzen der Macht. Bielefeld: transcript 2008 (279 S.; ISBN 978-3-89942-830-8; 26,80 EUR)

Christiane Thompson: Allgemeine Erziehungswissenschaft. Eine Einführung. Stuttgart: W. Kohlhammer 2020 (245 S.) [Rezension]

Rezension von: Christiane Thompson: Allgemeine Erziehungswissenschaft. Eine Einführung. Stuttgart: W. Kohlhammer 2020 (245 S.; ISBN 978-3-17-026165-5; 28,00 EUR)

Determination of Zinc, Cadmium, Lead, Copper and Silver Using a Carbon Paste Electrode and a Screen Printed Electrode Modified with Chromium(III) Oxide

In this study, the preparation and electrochemical application of a chromium(III) oxide modified carbon paste electrode (Cr-CPE) and a screen printed electrode (SPE), made from the same material and optimized for the simple, cheap and sensitive simultaneous determination of zinc, cadmium, lead, copper and the detection of silver ions, is described. The limits of detection and quantification were 25 and 80 mu g center dot L-1 for Zn(II), 3 and 10 mu g center dot L-1 for Cd(II), 3 and 10 mu g center dot L-1 for Pb(II), 3 and 10 mu g center dot L-1 for Cu(II), and 3 and 10 mu g center dot L-1 for Ag(I), respectively. Furthermore, this promising modification was transferred to the screen-printed electrode. The limits of detection for the simultaneous determination of zinc, cadmium, copper and lead on the screen printed electrodes were found to be 350 mu g center dot L-1 for Zn(II), 25 mu g center dot L-1 for Cd(II), 3 mu g center dot L-1 for Pb(II) and 3 mu g center dot L-1 for Cu(II). Practical usability for the simultaneous detection of these heavy metal ions by the Cr-CPE was also demonstrated in the analyses of wastewaters

Biotransformation of nitriles to amides using soluble and immobilized nitrile hydratase from Rhodococcus erythropolis A4

A semi-purified nitrile hydratase from Rhodococcus erythropolis A4 was applied to biotransformations of 3-oxonitriles 1a–4a, 3-hydroxy-2-methylenenitriles 5a–7a, 4-hydroxy-2-methylenenitriles 8a–9a, 3-hydroxynitriles 10a–12a and 3-acyloxynitrile 13a into amides 1b–13b. Cross-linked enzyme aggregates (CLEAs) with nitrile hydratase and amidase activities (88% and 77% of the initial activities, respectively) were prepared from cell-free extract of this microorganism and used for nitrile hydration in presence of ammonium sulfate, which selectively inhibited amidase activity. The genes nha1 and nha2 coding for α and β subunits of nitrile hydratase were cloned and sequenced

Werner Friedrichs: Passagen der Pädagogik. Zur Fassung des pädagogischen Moments im Anschluss an Niklas Luhmann und Gilles Deleuze (Theorie Bilden; Bd. 13). Bielefeld: transcript 2008 (303 S.) [Rezension]

Rezension von: Werner Friedrichs: Passagen der Pädagogik. Zur Fassung des pädagogischen Moments im Anschluss an Niklas Luhmann und Gilles Deleuze (Theorie Bilden; Bd. 13). Bielefeld: transcript 2008 (303 S.; ISBN 978-3-89942-846-9; 32,80 EUR)

Susanne Weber / Susanne Maurer (Hrsg.): Gouvernementalität und Erziehungswissenschaft. Wissen - Macht - Transformation. Wiesbaden: VS Verlag für Sozialwissenschaften 2006 (326 S.) [Rezension]

Rezension von: Susanne Weber / Susanne Maurer (Hrsg.): Gouvernementalität und Erziehungswissenschaft. Wissen - Macht - Transformation. Wiesbaden: VS Verlag für Sozialwissenschaften 2006 (326 S.; ISBN 3-531-14861-3; 32,90 EUR)

Erik Ode: Das Ereignis des Widerstands. Jacques Derrida und "Die unbedingte Universität". Würzburg: Königshausen und Neumann 2006 (216 S.) [Rezension]

Rezension von: Erik Ode: Das Ereignis des Widerstands. Jacques Derrida und "Die unbedingte Universität". Würzburg: Königshausen und Neumann 2006 (216 S.; ISBN 3-8260-3429-5; 29,80 EUR)

Engineering-geological comparative analysis of four cases studies of waste landfills

Abstract The aim of the paper is to carry out a comparative engineering-geological study of four different waste landfills using the evaluation criteria for the geological subsoil as a natural sealing barrier. The study evaluates 4 localities (Velké Pavlovice, Kvítkovice, Prakšice and Horní Suchá) using three variants (based on two standards) which approach the geological barrier requirements as a combination of impermeability requirements based on a filtration coefficient limit value. and the required geometry represented by investigation depths. The research was carried out in landfills in Moravia, in the east of the Czech Republic. The study’s motivation is to point at the differences in engineering-geological investigations of waste landfills (as for the requirements for impermeable geological subsoil as a natural sealing barrier) when compared with other engineering structures (where the main goal is to evaluate load-bearing capacity and settlement). The purpose of the geological barrier is to prevent the spread of contamination, and the paper shows this can be approached differently, as shown in two different methodologies investigated herein. The first model (Model 1) assumes there is a 3-m-thick subsoil below the landfill’s footing bottom, which manifests impermeability characterized by the filtration coefficient Kf ≤ 1.0 * 10–9 m/s, or a 30-m-thick subsoil of Kf ≤ 1.0 * 10–8 m/s. The second model (Model 2) assumes a 1-m thick, impermeable subsoil massif of Kf ≤ 1.0 * 10–9 m/s. We found that none of the landfills in the four selected localities had an impermeable layer in the required depth (a filtration coefficient Kf from 1.8 * 10–9 to 3.9 * 10–9 m/s), and thus did not comply with the limiting conditions. As a result, an anthropogenic technical barrier had to be installed. An important goal of the study from an environmental point of view was to assess the existence of a suitable geological barrier under the proposed landfills. The most important criterion from this point of view is permeability. An additional technical objective of the project was also the assessment of the possible creation of a technical anthropogenic isolation barrier. In the event that the natural sealing barrier would not be sufficient. This was shown in all solved case studies of engineering geological investigations of waste landfills