Tonight, I have been very busy.I have to finish this diary as soon as possible, since I must review my chemical experiment about dangerous signs later. At the begining, I did my biology experiment homework, which was really difficult to answer all the questions about Chromatography and spectrum analysis. We research on Tuesdays, and we did it on this week. I surfed the Internet to find acetone, petroleum about the ratio imformations and anthocyanoside about its structure and qulities and used Excel to draw a chart of wavelengths and O.D.. We also researched on chlorophy a, chlorophy b, beta-carotene and xanthophy. The study was not difficult to do but the theory is so complicated that I spent plenty of time finishing it. It not only took much time but also almost let me out of my mind. I had better go and say good night now. BYE BYE