Here's an example.
The other day I was cutting onions and my eyes began to stream. As a chemist I wondered what the substance was called that had this effect. I reached for my copy of Clayden and found everything spelled out for me.
Don't get me wrong; the work is fascinating. The subtle chemical differences between garlic and onion; specifically, the allylic and the vinylic sulfur compounds and the remarkable difference that they make are fascinating. But to blog this would be just to repeat what is in the text book.
Anyway, if you are interested in this work, have a look at amazon's search inside facility at the pages given of Clayden's book. And after reading and understanding that, you can read about how onions have been genetically engineered to stop you from crying in,
Silencing Onion Lachrymatory Factor Synthase Causes a Significant Change in the Sulfur Secondary Metabolite Profile.
(Impressive work: read it and w———).