The signal amplification by reversible exchange (SABRE) approach has been used to hyperpolarise the substrates indazole and imidazole in the presence of the co-ligand acetonitrile through the action of the precataysts [IrCl(COD)(IMes)] and [IrCl(COD)(SIMes)]. 2 H-labelled forms of these catalysts were also examined. Our comparison of the two precatalysts [IrCl(COD)(IMes)] and [IrCl(COD)(SIMes)]...

we give the concept of ‘braiding’ for 2-groupoids, and we show that this structure is equivalent tobraided regular, crossed modules.

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BACKGROUND Baclofen, the agonist of GABA(B) receptors, influences hypoxia-induced deficits in learning and memory processes. METHODS We studied the effects of baclofen on acquisition in the passive avoidance test and in the Morris water maze in groups of rats without or after hypoxia as well as the influence of baclofen on MMP-2 and MMP-9 levels in the hippocampus. RESULTS Even though baclo...

In the title paramagnetic 19-electron neutral complex, [W(BH(4))(C(21)H(24)N(2))(2)(NO)(2)], the W(0) atom is coordinated by two 1,3-bis-(2,4,6-trimethyl-phen-yl)imidazol-2-yl-idene (IMes) carbene ligands, two NO groups and two H atoms of an η(2)-tetra-hydro-borate ligand. Depending on the number of coordination sites (n) assigned to the BH(4) (-) ligand, the coordination geometry of the W atom...

We research on the possible orientations patterns of a grid graph G, and propose a method for counting certain combinatorial structures over the class of orientations of G. For example, our method can be applied for counting sink-free orientations of G, as well as it can be applied for solving the #2SAT problem for grid Boolean formulas. Our proposal extends the classical transfer matrix method...

We are developing a multi-channel/multifunction prosthetic hand/arm controller system capable of receiving and processing signals from up to sixteen Implanted MyoElectric Sensors (IMES). The appeal of implanted sensors for myoelectric control is that EMG signals can be measured at their source providing relatively cross-talk free signals that can be treated as independent control sites. Therefo...

The subcellular pattern of cytosolic free Caz+ ([Caz+li) changes in human polymorphonuclear neutrophils (PMNs) was studied using imaging of fura-2 fluorescence (time resolution 12.5 ratiosls) to determine whether PMNs could obtain directional information from the [Ca2+li signal. [Ca2+li changes were observed during initial adherence, the subsequent chemotactic movement, and the phagocytosis ...