Sentence:  After drying the sections under the fan , fixing in acetone , and drying at 37 ` as in the indirect method , the sections were <WSD>treated</WSD> with conjugated * * f or * * f ( undiluted unless mentioned otherwise ) for 5 - 30 minutes . 
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