Data Views Exclude Ubiquitous Chemicals Activities: 338 Chemicals w/Activities: 42 CSV Excel PDF All Chemicals: 66 Previous123 Show all rows. Paginate rows. Click on column headings to sort table by that column # Activity Chemical Part All Leaf Plant Rhizome Seed Symbiotic Ergot Sclerotia Low PPM High PPM StdDev *Reference 28 28 VANILLIN Rhizome -- -- * 77 77 ZINC Plant -- -- Pedersen, M. 1987. Nutritional Herbology. Pederson Publishing. Bountiful, Utah. 377 pp. *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.