Good luck on that one CG, I am a chemmie gal, not really, but you know my background. I actually worked at DuPonts agricultural experimental station when I was in college. I will tell you, those guys were geeks to the max. My main job was mowing the grass, so I was pretty safe. I used to be a gardener for the retired director of this facility. He was such a nice person. They had quite the estate...beautiful trees, a greenhouse full of orchids...I loved them. My first day of work, I was just 15, I hit my boss lady in the head with the shovel. Wow, and they kept me. It was an interesting job, and I still remember all of it and use the skills I learned there to this day.