Data Views Exclude Ubiquitous Chemicals Activities: 214 Chemicals w/Activities: 16 All Chemicals: 22 CSV Excel PDF Previous12 Show all rows. Paginate rows. Click on column headings to sort table by that column # Activity Chemical Part All Leaf Plant Seed Low PPM High PPM StdDev *Reference 31 31 THIAMIN Leaf 2.4 9.0 0.14 * 0 WATER Leaf -- 815000.0 0.04 * *Unless otherwise noted all references are to Duke, James A. 1992. Handbook of phytochemical constituents of GRAS herbs and other economic plants. Boca Raton, FL. CRC Press.