15750
Multiple elution / rebinding cycles were conducted in different buffer solutions , and rebinding of T4 could be observed , with a moderate binding affinity that depended greatly on the solvent used .
 None
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities:  
Answer:
 None