You have done a good job, especially on phenol extraction paragraph. I am working on the same paper: its slide. I have completed about 6 slides need more slides. I would find them on the internet somewhere to make may explanation.  
I am hoping you can assist me in developing a better slides.

Those reds marks are not something I have use  in the past can you remove them and give me a finished documents. and let me know about the slides.