Junge Müller

In Alberts zweiten Kommentar zur Nikomachischen Ethik findet sich vor der Kommentierung des Aristoteles-Textes ein eigenständiger Traktat zum allgemeinen Begriff des Guten, der im Rahmen des Artikels erstmals in kritischer Edition zugänglich gemacht wird. In doktrinaler Sicht handelt es sich um einen Text von fundamentaler Bedeutung, insofern Albert verschiedene Definitionen und Bestimmungen des Guten in ihrer inhaltlichen Vereinbarkeit und Konvergenz aufweist. In nuce entwickelt Albert hier die für sein ganzes Werk maßgebliche Metaphysik des Guten, in welche sowohl die Transzendentalienlehre als auch die Grundmotive einer teleologischen Strebensethik aristotelischen Zuschnitts integriert werden. Der ethisch relevante Begriff des Guten findet dadurch seine ontotheologische Fundierung im höchsten Guten, also in Gott. Der vorliegende Artikel rekonstruiert im Anschluss an die kritische Edition die zentralen Argumente des Traktats und verortet diese durch Abgleich mit anderen Schriften in Alberts gesamten Oeuvre und Denken.Albert‘s second commentary on Aristotle‘s Nicomachean Ethics is preceded by an independent treatise dealing with the general concept of the good, which is made accessible in a critical edition in this article for the first time. Regarding its doctrinal contents this treatise proves to be of fundamental importance because Albert demonstrates the compatibility and even the convergence of several different definitions and descriptions of the good, e.g. by Aristotle, Avicenna, Ps.-Dionysius and Boethius. Albert develops in a nutshell his metaphysics of goodness which is of overarching importance for his whole work and which integrates the theory of the transcendentals as well as the basic ideas of an ethical teleology in an Aristotelian vein. Thereby, the concept of the moral good finds its ultimate foundation in the highest good, i.e. in God. Drawing on the text of the presented critical edition the article retraces the central arguments of this treatise and compares them with other writings in order to show their place in Albert’s complete work and thought.

We dispersed electrochemical etched Si into a colloid of ultrasmall blue luminescent nanoparticles, observable with the naked eye, in room light. We use two-photon near-infrared femtosecond excitation at 780 nm to record the fluctuating time series of the luminescence, and determine the number density, brightness, and size of diffusing fluorescent particles. The luminescence efficiency of particles is high enough such that we are able to detect a single particle, in a focal volume, of 1 pcm3. The measurements yield a particle size of 1 nm, consistent with direct imaging by transmission electron microscopy. They also yield an excitation efficiency under two-photon excitation two to threefold larger than that of fluorescein. Detection of single particles paves the way for their use as labels in biosensing applications. © 2000 American Institute of Physics.