Oekoeffiziente Duenger - Entwicklung zur Minimierung der Stickstoffemissionen in Wasser und Luft Schlussbericht

Feeding the world's population today is due to the use of mineral fertilizers in agriculture. Usually, mineral fertilizers supply nitrogen in form of nitrates which can be leached into the ground water or (after reduction) get lost into the atmosphere as gaseous nitrogen compounds (e.g. N_2O). These losses are on the one hand of ecological concern and on the other hand cause reduced agricultural yields. The development of ecoefficient fertilizers aims at an increase of fertilizer use efficiency and at the same time at a reduction of the ecological problems of nitrogen fertilization. Within the scope of this research and development project new nitrification inhibitors, slow release fertilizers and biodegradable materials as fertilizer coatings were investigated with regard to their chemical, technical and agricultural potential. A new nitrification inhibitor has been developed and already introduced into the market. New slow release fertilizer and coating materials show promising perspectives for a further generation of ecoefficient fertilizers. (orig.)SIGLEAvailable from TIB Hannover: F00B329+a / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekBundesministerium fuer Bildung und Forschung (BMBF), Bonn (Germany)DEGerman

Smart power IC macromodeling for DPI analysis

This paper deals with the susceptibility to radio frequency interference of smart power integrated circuits. A method to perform simulations aimed at evaluating the performance of subcircuits included in a more complex IC in the presence of EMI is presented. Referring to this, the behaviour of a current sensor included into a high-side power switch during DPI test is investigated. The results of simulation analyses and DPI tests are presented

Novel organic-soluble molecular titanophosphonates with cage structures comparable to titanium-containing silicates

Reactions of Cp∗TiMe3 (Cp∗ = C5Me5) with methyl-, phenyl- and tert-butylphosphonic acids [RP(O)(OH)2] (R = Me, Ph, t-Bu) yield the air-stable titanophosphonates [(Cp∗TiO3PR)4(μ-O)2] (R = Me (1), Ph (2)) and [(Cp∗Ti)3(t-BuPO3)2{t-BuPO2(OH)}(μ-O)2] (3), which are freely soluble in organic solvents. Alternatively, the reaction between Cp∗TiCl3 and methylphosphonic acid was also found to produce 1. The titanophosphonates mentioned are the first examples of organic-soluble molecular transition metal phosphonate cages

Entwicklung oekoeffizienter Duenger zur Minimierung der Stickstoffemission in Wasser und Luft Schlussbericht

Available from TIB Hannover: F05B276 / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekSIGLEBundesministerium fuer Bildung und Forschung (BMBF), Bonn (Germany)DEGerman