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Wolf-Dieter Schneider 한국물리학회 2007 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.51 No.3
The quest for a reliable method of fabricating ordered atomic-scale structures is a prequisite for future atomic-scale technology. The interest in such nanostructured materials consisting of building blocks of a small number of atoms or molecules arises from their promising new optic, catalytic, magnetic and electronic poperties, which are fundamentally different from those of their macroscopic bulk counterparts: small is different. Here, we present and review three examples concerning atomic and supramolecular self-assembly investigated by low-temperature scanning tunneling microscopy (STM). (i) First is the self-assembly of a two-dimensional array of individual Ce adatoms (the smallest possible building block) on a metal surface based on long-range interactions between adatoms mediated by surface state electrons. Ce is a magnetic atom, and such a hexagonal superlattice of magnetic adatoms might be useful for the development of future atomic-scale magnetic devices. (ii) Next is the conservation of chirality in a hierarchical supramolecular self-assembly of pentagonal symmetry of the organic molecule rubrene on a reconstructed Au(111) surface. We show the spontaneous chiral resolution of the racemate into disjoint homochiral complex architectures and demonstrate the ability to monitor directly the evolution of chiral recognition processes on the molecular and the supramolecular level. (iii) Finally, using the highly localized current of electrons tunneling through a double barrier STM junction, we excite luminescence from a selected C60 molecule in the surface layer of fullerene nanocrystals self-assembled on an ultrathin NaCl film on Au(111). In the observed fluorescence and phosphorescence spectra, pure electronic, as well as vibronically induced transitions of an individual C60 molecule, are identified, leading to unambiguous chemical recognition on a single-molecule scale.
Eine Einführung in das Tagungsthema ‚Toleranz und Fremdsprachenunterricht‘ am Beispiel des
( Wolf Dieter Otto ) 한국독일어교육학회 1998 외국어로서의 독일어 Vol.3 No.-
Der Begriff der ,Toleranz‘ ist wie der Begriff des ,Fremde‘ ein Relationsbegriff bzw. eine Beziehungskategorie, die kulturelle Pluralität als Grundverfassung der menschlichen Wirklichkeit erkennt und anerkennt. 1 Der Toleranzbegriff verdankt seine Entstehung und seine Wirkung dem Bemühen, Beziehungen unter Menschen zu gestalten; seine Geschichte in Deutschland und Europa zeigt, daß Intoleranzerfahrungen vielfach sein theoretischer Nährboden sind. In der Geschichte der Beschäftigung mit Toleranzfragen ist der Zusammenhang von Fremdheits- und Toleranzfragen als Ausgangspunkt für die Beschäftigung mit ,Toleranz‘ neuartig. Das ist um so verwunderlicher, als Toleranzfragen sich vielfach am Problem des Verhältnisses gegenüber dem Anderen, der jedoch nicht notwendig ein Fremder sein muß, entzünden und in der Praxis entweder zu seiner ,Duldung‘, wie Toleranz ins Deutsche übersetzt wird, oder seiner Verfolgung führte.
Perspectives for Ginsenosides in Models of Parkinson’s Disease
Wolf-Dieter Rausch,Lin Wei-Ming,Gabriele Gille,Khaled Radad 고려인삼학회 2007 Journal of Ginseng Research Vol.31 No.3
Ginseng, the root of Panax species, is a well-known herbal medicine. It has been used as traditional medicine in Korea, China and Japan for thousands of years and now is a popular and worldwide natural medicine. The active principles of ginseng are ginsenosides which are also called ginseng saponins. Traditionally ginseng has been used primarily as a tonic to invigorate weak body functions and help the restoration of homeostasis. Current in vivo and in vitro studies demonstrate its beneficial effects in a wide range of pathological conditions such as cardiovascular diseases, cancer, immune deficiency and hepatotoxicity. Moreover, recent research indicates that some of ginseng’s active ingredients exert beneficial actions on aging and neurodegenerative disorders such as Parkinson´s disease. Essentially, antioxidant, antiinflammatory, anti-apoptotic and immunostimulant activities are mostly underlying the postulated ginseng-mediated protective mechanisms. Next to animal studies, data from neural cell cultures contribute to the understanding of these mechanisms which involve decreasing nitric oxide, scavenging of free radicals and counteracting excitotoxicity. This paper focuses on own and other neuroprotective data on ginseng for dopaminergic neurons and intends to show aspects where neuroprotection e.g. by ginsenosides, additionally or preceding standard Parkinson therapy, could come about as a valuable contribution to slow neurodegenerative processes.
Die Fremdheit zwischen den Deutschen - Uber den inneren Vereinigungsprozeß in Deutschland -
Otto, Wolf Dieter 서울대학교 외국어교육연구소 1998 외국어교육연구 Vol.1 No.1
The purpose of this paper is to explore the problem of internal integration in wùfied German. In this paper, the analysis of the texts in which West Germany evaluates East Germany indicates no intemal integration of them. The paper also tries to find out the source of differential behavior between them.