A theoretical model for the Volmer-Weber growth of three-dimensional metal islands is proposed, with a dipolar island edge-edge interaction. The existence of such an island edge effect makes the island shape dependent on island size. Furthermore, it induces a stable island size against coarsening, leading to self-assembled islands of uniform size. The dependence of the stable island size on tot...

Room temperature phosphorescence emission of erythrosin B in sol±gel silica is studied over the oxygen pressure range from 10ÿ6 to 1000 mbar. Quenching by oxygen is signi®cant over the entire range. The Stern±Volmer (SV) intensity data can be very well ®tted using the two-site model. The temperature dependence of the phosphorescence and the delayed ̄uorescence are examined from ÿ173 to 2008C at...

In this paper we analyze a planar model for a molten carbonate electrode of a fuel cell. The model consists of two coupled second-order ordinary diierential equations, one for the concentration of the reactant gas and one for the potential. Restricting ourselves to the case of a positive reaction order in the Butler-Volmer equation, we consider existence, uniqueness, various monotonicity proper...

The effect of non-radiative energy transfer and diffusion on the fluorescence decay of phenanthrene in the presence of acridine was observed in six solvents of viscosity 7 = 0.4 CP to 64.6 CP. The system obeys Stem-Volmer kinetics at low 7, Forster kinetics at high 7 and intermediate kinetics at medium 7. At 7 = 64.6 CP the decay obeys the Forster relation. At lower 7 it agrees satisfactorily w...

Bovine α-lactalbumin is known to be present in molten globule form in its apo-state (i.e., Ca depleted state). In this preliminary study, heat-induced conformational changes were analyzed using the fluorescence spectroscopy at very low pH in the absence and the presence of calcium ions. The heat treatment caused the decrease of intrinsic fluorescence, evidencing the increase of intramolecular q...

Acriflavine (3,6-diaminoacridine) is an anticeptic drug developed in 1912. Previous research has focused on investigation of the intercalating features of acriflavine, but little is known about its interaction with proteins. Drug-receptor interaction is of major interest in clinical science. The aim of the present study was to evaluate the ability of acriflavine to induce alterations in conform...

Interactions of cationic tetrakis (N,N´,N´´,N´´´-tetramethyltetra-3,4-pyridinoporphyrazinatocobalt(II) (Co(tmtppa)) with synthetic polynucleotides, poly(A-T), poly(G-C) and calf thymus DNA have been characterized in 5 mM phosphate buffer, pH 7.2, by optical absorption and fluorescence spectroscopy. The appearance of hypochromicity effect and the red shift in UV-Vis spectrum of porphyrazine was ...

1. General information S2 2. Synthesis of carboxylic acids S3 3. Stoichiometric experiments with benzoyl hypobromite II S4 4. Optimization and control reactions S8 5. Oxidant screen S9 6. General procedure for the visible light-promoted aryl decarboxylation S9 7. Scope of the visible light-promoted decarboxylation/radical trapping S10 8. Mechanistic studies S19 a) Stern-Volmer luminescence quen...

lease Patterns after Coronary Artery Bypass Grafting with or without Cardiopulmonary Bypass and after Aortic and Mitral Valve Surgery, Joost C.J.M. Swaanenburg, Bert G. Loef, Marcel Volmer, Piet W. Boonstra, Jan G. Grandjean, Massimo A. Mariani, and Anne H. Epema ( Department of Pathology and Laboratory Medicine, 2 Thoracic Center, and 3 Department of Anesthesiology, University Hospital Groning...