Sentence:  Sections of sweet clover stem and root tumors were <WSD>treated</WSD> with 1 : 10 solution of * * f for 30 minutes , washed in buffered saline for 15 minutes , stained with * * f for 30 minutes , and washed for 15 minutes in PBS . 
Meaning of the word marked with <WSD> tags:  subject to a process or treatment, with the aim of readying for some purpose, improving, or remedying a condition