In Opening the Symposium

　It is our greatest pleasure to have a symposium on active transport with the attendance of Dr. Visscher．This is the first international meeting on active transport to be held in Japan．

　Dr. Visscher is really a pioneer in this field．He has published many papers on intestinal absorption of salts and water since 1935．His outstanding work, using radio isotopes, has clarified for the first time the relation between influx and outflux of salt through the intestinal wall．