We report on the correlation between the laser damage resistance, the optical and the physical properties of Sc(2)O(3)/SiO(2) mixture coatings. Several sets of samples with ten different mixture ratios have been prepared by ion-beam sputtering. The atomic compositions of the mixture thin films are quantified employing x-ray photoelectron spectroscopy depth profiles. Laser-induced damage thresho...

The diastereo- and enantioselective microbial oxidation of a mixture of racemic cis/trans-chrysanthemols to the corresponding stereoisomeric chrysanthemic acids by Aspergillus species is described. Of the three microorganisms which were found capable of oxidizing racemic cis/trans-chrysanthemols, A. ochraceus ATCC 18500 showed complete enantioselectivity for (+)-stereoisomers [(+)-trans-chrysan...

Multi-Watt efficient compact green laser sources are required for a number of applications e.g. within biophotonics, laser pumping and laser displays. We present generation of 3.5 W of diffraction-limited green light at 515 nm by second harmonic generation (SHG) of a tapered diode laser, itself yielding more than 9 W at 1030 nm. SHG is performed in single pass through a cascade of two nonlinear...

We report the demonstration of high-sensitivity intracavity laser absorption spectroscopy with multiple-quantum-well vertical-external-cavity surface-emitting semiconductor lasers (VECSEL's). A detection limit of 3 x 10(-10) cm (-1) has been achieved. The spectrotemporal dynamics of a VECSEL in the 1030-nm wavelength region has been studied. The laser was operating cw at room temperature, with ...

A prospective study to determine the incidence of hiatus hernia and gastro-oesophageal reflux in 1030 consecutive symptomatic adult Nigerian patients undergoing barium meal examination is reported. The results show a very low incidence of hiatus hernia (0-39%) and an equally low incidence of gastro-oesophageal reflux (2-2%) when compared with similar studies in Europe and America. There was a h...

Correspondence to Ulrike Kutay: [email protected] Y. Turgay’s present address is Dept. of Biochemistry, University of Zurich, CH-8057 Zurich, Switzerland. D.W. Gerlich’s present address is Institute of Molecular Biotechnology, 1030 Vienna, Austria. P. Meraldi’s present address is Centre Médical Universitaire, Université de Genève, CH-1211 Geneva, Switzerland. Abbreviations used in th...

accident and emergency departments in east London: the contribution of practice organization, population characteristics, and distance. J Health Serv Res Policy 1997;2:6-13. 3 Morgan K, Prothero D, Frankel S. The rise in emergency admissions: crisis or artefact? Temporal analysis of health services data. BMJ 1999;319:158-9. 4 Meggs MJ, Czaplijski T, Benson T. Trends in emergency department util...