Light scattering from an amplifying medium bounded by a randomly rough surface: A numerical study

We study by numerical simulations the scattering of $s$-polarized light from a rough dielectric film deposited on the planar surface of a semi-infinite perfect conductor. The dielectric film is allowed to be either active or passive, situations that we model by assigning negative and positive values, respectively, to the imaginary part $\epsilon_2$ of the dielectric constant of the film. We study the reflectance ${\cal R}$ and the total scattered energy ${\cal U}$ for the system as functions of both $\epsilon_2$ and the angle of incidence of the light. Furthermore, the positions and widths of the enhanced backscattering and satellite peaks are discussed. It is found that these peaks become narrower and higher when the amplification of the system is increased, and that their widths scale linearly with $\epsilon_2$. The positions of the backscattering peaks are found to be independent of $\epsilon_2$, while we find a weak dependence on this quantity in the positions of the satellite peaks.Comment: Revtex, 9 pages, 9 figure

Chromatographic performance of molecularly imprinted polymers: Core-shell microspheres by precipitation polymerization and grafted MIP films via iniferter-modified silica beads

In this work, two different surface imprinting formats have been evaluated using thiabendazole (TBZ) as model template. The first format is a thin film of molecularly imprinted polymer (MIP) grafted from preformed silica particles using an immobilized iniferter-type initiator (inif-MIP). The second format is molecularly imprinted polymer microspheres with narrow particle size distribution and core-shell morphol. prepd. by pptn. polymn. in a two-step procedure. For the latter format, polymer microspheres (the core particles) were obtained by pptn. polymn. of divinylbenzene-80 (DVB-80) in acetonitrile. Thereafter, the core particles were used as seed particles in the synthesis of MIP shells by copolymn. of DVB-80 and methacrylic acid in the presence of TBZ in a mixed solvent porogen (acetonitrile/toluene). The materials were characterized by elemental microanal., nitrogen sorption porosimetry and scanning (and transmission) electron microscopy. Thereafter, the imprinted materials were assessed as stationary phases in liq. chromatog. From this study it can be concluded that grafted MIP beads can be obtained in a simple and direct manner, consuming only a fraction of the reagents used typically to prep. imprinted particles from a monolithic imprinted polymer. Such materials can be used in the development of in-line molecularly imprinted solid-phase extn. methods. © 2010 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 48: 1058-1066, 2010

Georg Neumarks/ Fürstlichen Sächsischen Weinmarischen Secretarii Poetische Tafeln/ Oder Gründliche Anweisung zur Teutschen Verskunst

GEORG NEUMARKS/ FÜRSTLICHEN SÄCHSISCHEN WEINMARISCHEN SECRETARII POETISCHE TAFELN/ ODER GRÜNDLICHE ANWEISUNG ZUR TEUTSCHEN VERSKUNST Georg Neumarks/ Fürstlichen Sächsischen Weinmarischen Secretarii Poetische Tafeln/ Oder Gründliche Anweisung zur Teutschen Verskunst ([1]r) Kupfertitel ([1]v) Titelseite ([2]r) Hermannus Conringius, ... Apud nos Germanos, fateor, non ea hactenus fuit ... ([2]v) Etlicher Vornehmen Patronen und wehrten Freunde ... ([3]r) Nothwendige Vorrede an den Gewogenen Leser. ([3]r) [15 Tafeln von der ..., Wörter Wohl- und Übelstand, ...] (1) Anmerkungen über Vorhergehende Poetische Tafeln/ Zum Theil nach eigener Anleitung des H. Authoris, ... (1) Fotodokumentation ( -