The development of an in-line digestion system based on simple UV lamp is reported. The effect of photolysis on the preconcentration of copper was investigated using an in-line Chelex-l00 ion-exchange column linked to an atomic absorption spectrometer. Three model ligands, glycine, NTA and EDTA, have been used to demonstrate the effect of the digestion system. In a stopped-flow mode, over 90% o...

Using electron energy loss spectroscopy, we have probed the spin waves of fcc(100) cobalt after capping with 1–3 atom layers of pseudomorphic nickel or up to 12 atom layers of copper. The intensity decay of the spin wave signal is quantitatively described by the mean-free path of the incident and the scattered electron within the capping layer. The observed spin waves are therefore localized at...

Single cell Chelex® DNA extraction and nested PCR amplification were used to examine partial gene sequences from natural diatom populations for taxonomic and phylogenetic studies at and above the level of species. DNA was extracted from cells that were either fresh collected or stored in RNAlater. Extractions from Lugol's fixation were also attempted with limited success. Three partial gene seq...

The purified obelin was electrophoresed on 7 % polyacrylamide gels in Tris-glycine buffer, pH 8.3, containing 0.1 mM-EDTA. Gels stained with Coomassie Brilliant Blue showed a single band at the buffer front, which correlated in position with luminescent activity. This activity could be eluted from unstained gel slices by soaking them overnight in 0.1 mM-EDTA-lOmM-Hepes, pH 7.0, at 4°C. Obelin i...