Figure 3. — Spray drying a partially soluble hydrolysate. 



minimized with an FPC starting material. Such 

 a process might be most suitable for the prepa- 

 ration of a soluble protein product which would 

 command a high price for use in carbonated bev- 

 erages. 



Replicate runs with selected enzymes. — Anal- 

 ysis of the various runs with red hake showed 

 that the hydrolysates prepared with alkaline 

 bacterial proteases had amino acid analyses 

 which ranked highest in terms of chemical 

 scores. Pancreatin hydrolysates ranked second 



by this method for estimating nutritive value. 

 Both the alkaline enzymes and pancreatin gave 

 average yields of soluble product from fish of 

 about 14 ''r. Average yields with the other en- 

 zymes used were lower. Alcalase (an alkaline 

 B. subtilis protease, pancreatin, and straight 

 autolysis were chosen for evaluation by repli- 

 cate runs with both hake and a fatty fish. 



Four runs with each of three processes were 

 made with hake. Three runs with each of three 

 processes were made with alewife (Alosa pseu- 

 doharengus) , a fatty fish. Alewife press cake 



