background : identifying the sources of variation in qtc measurements is important for preventing arrhythmias during and after hemodialysis. the present study was designed to determine the correlation between the type of hemodialysis buffer and the changes in qtc interval in patients on chronic hemodialysis.   methods: fifty-nine patients on chronic hemodialysis who referred in winter 2007 to h...

H I absorption has been detected with the WSRT against both lobes of the radio galaxy Coma A. This radio galaxy could be expanding in a particularly gas rich environment, perhaps the result from interac-tions/mergers between the dominant giant galaxy (associated with the radio galaxy) and less massive galaxies in the same group. Powerful radio galaxies are frequently associated with kpc-sized e...