Dieselruß: Mikrostruktur und Oxidationskinetik

The engine internal emission reduction of commercial vehicles has been very im-pressive during the last ten years. The mass related reduction of the soot emission is a result of the reduced number of particles also with regard to those 96H30)6 with the mass 7098 u. The microstructures of soot particles are related to the chemical reactivity against the oxidizing agent nitrogen dioxide, NO2 by kinetic measurements. The obtained knowl-edge will be applied in the practice for minimizing the soot particle emission of diesel en-gines and for increasing the activity of exhaust aftertreatment with PM-KATâ and GD-KAT systems. The investigation of the formation and the properties of diesel soot of advanced commercial engines is just at the beginning. We expect that the chemical properties of the surface and the microstructure of soot emitted from advanced diesel engines will re-define toxicity (threshold value of secondary genotoxicity) and relevance of physical measurement methods

Cardiopoietic cell therapy for advanced ischemic heart failure: results at 39 weeks of the prospective, randomized, double blind, sham-controlled CHART-1 clinical trial

Cardiopoietic cells, produced through cardiogenic conditioning of patients' mesenchymal stem cells, have shown preliminary efficacy. The Congestive Heart Failure Cardiopoietic Regenerative Therapy (CHART-1) trial aimed to validate cardiopoiesis-based biotherapy in a larger heart failure cohort

Antistatische oder elektrisch leitfähige Polyurethane

Die vorliegende Erfindung betrifft Polyurethane, enthaltend Kohlenstoff Nanorohrchen und io­ nische Flussigkeiten. Weiter betrifft die vorliegende Erfin­ dung ein Verfahren zur Herstellung dieser Polyurethane so­ wie deren Verwendung zur Herstellung von Folien, Schlau­ chen, Walzen, Riemen, Formteilen, beheizbare Formteilen, Beschichtungen oder Schuhsohlen

On cyclic conjugation of the members of the pyrene/pyropyrene series and their formally -localized derivatives

In the pyrene/peropyrcne homologous series cyclic conjugation is found lo follow a pauern different from what the classical Kekule-structure-based theories would predict. In the derivatives of these benzenoid srtems, in which the n-electrons formally belong to localized double bonds, the Kekule-structure-based picture is fully violated

Polyurethane mit reduzierter Aldehydemission

Abstract: The present invention relates to a method for preparing polyurethanes, in which method (a) polyisocyanate, (b) polymeric compounds comprising groups that are reactive to iso- <1l cyanates, (c) catalysts, (d) compounds of general formula R(-S)n, where R represents any group, n represents any number between I and 8, and S represents a group according to formula I: and optionally (e) blowing agents, (f) chain lengthening- and/or crosslinking agents and (g) auxiliaries and/or additives are mixed to form a reaction mixture, and the reaction mixture is allowed to fully react to form the polyurethane

Verfahren zur Herstellung von transparenten harten thermoplastischen Polyurethanen

The present invention relates to a thermoplastic polyurethane obtainable or obtained by conversion of a polyisocyanate composition, a chain extender and a polyol composition, wherein the polyol composition includes at least one polyol (PI) having a molecular weight Mw in the range from 500 to 2000 g/mol and has at least one aromatic polyester block (BI), wherein the hard segment content in the thermoplastic polyurethane is < 75%. The present invention further relates to a process for producing a shaped body comprising such a thermoplastic polyurethane, and to shaped bodies obtainable or obtained by a process of the invention

Superphenalene-based columnar liquid crystals

Liquid crystals from large graphitic segments: Discotic compounds based on substituted superphenalenes were prepared by a surprisingly simple synthesis and processed to give soft and highly soluble columnar liquid-crystalline mate-rials. The regiospecific synthesis leads to compounds with pinwheel-type C3 symmetry