Hi. I've been having problems finding some primary sources for my lab report for days. I've used my school's search engines, but I can't find anything appropriate to use. My report will sum up my experiment on how pH affects an enzyme's activity (catecholase catalyzing catechol and oxygen to make benzoquinone) . I've searched using all combinations of words I could think of, but still I leave with nothing but a headache... So, my question is "Is there a website with (free full) articles that aren't so specific?? Something that I can understand and use for such a simple experiment. I know what I want my sources to say, but I can't find it in any peer reviewed, original research. Thanks!