Hou, Ying Sobhy, Ahmed
Published in
Tenside Surfactants Detergents
To study the sodium oleate (NaOL) adsorption on quartz and its effect on flotation under weak-acidic conditions, the adsorption characteristics of NaOL on the surface of quartz were determined at pH = 6.5 by Fourier transform infrared spectroscopy (FTIR). The solution chemical calculation results show that NaOL exists as oleic acid (HOL) under weak...
Elmlinger, Philipp Simon
Diese Arbeit behandelt die Prozessierung verlustarmer Lichtwellenleiter für einen optischen UVC-Gassensor. Durch optische Simulationen wurde zunächst ein geeignetes Material (amorphes Quarzglas) und Design abgeleitet. Mittels Belichtung mit einem Ultrakurzpulslaser und anschließendem selektiven Nassätzen wurden die Lichtleiter aus dem Wafer struktu...
Liebermann, J.
Published in
Keramische Zeitschrift
Hochspannungsisolationen sind die größten und kompliziertesten Produkte, die aus silikatkeramischen Werkstoffen hergestellt werden. Sie haben eine herausragende Bedeutung für die Übertragung und Verteilung der elektrischen Energie. Die wichtigste Kundenforderung, die an Isolatoren gestellt wird, ist ihr zuverlässiges Verhalten über Jahrzehnte an al...
Buzimov, A.Y. Kulkov, S.N. Kurovics, E. Eckl, Wilhelm Pappert, Sandra
This paper presents the results of a study of the influence of mechanical activation on morphology, specific surface area and phase composition of natural zeolite of Tokaj Mountain. During the mechanical activation of zeolites powders with specific surface area of 19-20 square meters per grams, significant changes in chemical and mineralogical comp...
VomBauer-Efferen, Christiane
Selim, K. A. Abd El-Rahiem, F. H. El-Midany, A. A.
Published in
Tenside Surfactants Detergents
Most of the world iron ores are associated with siliceous impurities. Upgrading schemes depend mostly on the removal of these impurities by flotation and/or selective flocculation techniques, which mainly influenced by the adsorption of collectors on both valuable and gangue minerals. In this study, the adsorption of amphoteric collector (dodecyl-N...
Langenhorst, F. Deutsch, A. Stöffler, D. Hornemann, U.
Features characteristic of shock metamorphism in target rocks are the main diagnostic tool for recognizing impact phenomena on the Earth and other planetary bodies, and experimentally calibrated shock effects in silicate minerals have been important in elucidating the pressure histories of these rocks. Except for a few preliminary results for exper...
Kilpper, R. MacKenzie, J. Morrow, P. Dasenbrock, C. Koch, W. Mermelstein, R. Mohr, U. Muhle, H.
SPF, F-344 rats were exposed 6 hr/da 5 da/wk for up to 24-mo to a special test toner at 0, 1, 4 and 16 mg m E-3, TiO2 at 5 mg m E-3, SiO2 at 1 mg m E-3 by the inhalation route. The test toner material was enriched in fine particles, such that the respirable aerosol concentrations (ACGIH) correspond to 0, 0.35, 1.4 and 5.6 mg m E-3. The design of th...
Kilpper, R. Mackenzie, J. Morrow, P. Bellmann, B. Creutzenberg, O. Mermelstein, R. Muhle, H. Stoeber, W.
Male and female F-344 rats were exposed 6 hrs/day 5 days/week for up to 24-months to a special test toner at 0, 1, 4 and 16 mg m E-3, TiO2 at 5 mg m E-3, SiO2 at 1 mg m E-3 by the inhalation route under SPF conditions. The dynamics of alveolar clearance and pulmonary retention were measured after 3, 9, 15, 21 and 24 months exposure. The quantity of...
Behnke, W. Nolting, F. Zetzsch, C.
The heterogeneous photodegradation of organic compounds adsorbed on various sands or on silica gel has been investigated previously in the bulk in static or rotating drum photoreactors. Since it is not possible to monitor or to control the active species of such degradation reactions we decided to construct a smog chamber optimized for long residen...
