The following data were obtained when the drug was adsorbed using an adsorption column (5 cm dia*15 cm). In this case, the flow rate of the feed is 400 ml/hr, and the concentration of the adsorption component is 0.75 U/liter. At this time, U represents the biological activity of the pharmaceutical component. Based on the results of the experiment above, answer the questions below when scaling up with a column of 30cm length. A) Find LUB and t* in the 15cm column, respectively. B) Use the 15cm column data to predict the break point (tb) at L=32cm.

t(h) (U/liter) 20.5 26.7 32.0 36.0 0.01 0.17 0.39 0.53 1.0 03/9 03 1 0 10 20 30 40 50 (h) (