Water movement and plankton in Strangford Lough

2 volsAvailable from British Library Lending Division - LD:D55459/85 / BLDSC - British Library Document Supply CentreSIGLEGBUnited Kingdo

Evaluation of the stability of the proton chemical shifts of some metabolites other than water during thermal cycling of normal human muscle tissue

MR temperature measurements made by the chemical-shift-of-water technique in peripheral muscle of volunteers have produced larger-than-expected coefficients of change and shown significant hysteresis effects as the temperature was cycled, although these effects were not reproduced in the present study. Previous work has suggested that susceptibility effects could be a contributor to the behavior of the chemical shift data. Here, we use proton spectroscopy of muscle in conjunction with temperature cycling to evaluate the relative shifts of the water peak and those of creatine, choline, and lipids. These latter are considered not to have significant temperature coefficients of chemical shift. The results show that these lines remain very stable as the temperature is cycled, suggesting that susceptibility effects are not present in this study. The method offers the possibility that the lines can be used as frequency references if there are any questions about the stability of other moieties

Advection, diffusion and patch development in the rias Baixas

6 pages, 3 figures, 2 tablesThis work was supported by the EC MAST-CT90-0017 on the Control of the Phytoplankton DominanceN

The North Atlantic turbine: Views of production processes from a mainly North Atlantic perspective

13 páginasA brief account is given of the ‘agricultural hypothesis’, the key studies which led to its replacement by the ‘grazing hypothesis’, and early models of the classical planktonic food chain. The budgetary problems posed by these views led to interest in the roles of dissolved and particulate components of planktonic ecosystems, and to discovery of the ‘microbial loop’. The balance between these alternative pathways is seen to reflect processes at the interface between hydrodynamics and ecologyPeer reviewe