Data Views Exclude Ubiquitous Chemicals Activities: 376 Chemicals w/Activities: 40 All Chemicals: 61 CSV Excel PDF Previous1234 Show all rows. Paginate rows. Click on column headings to sort table by that column # Activity Chemical Part All Plant Root Tuber Low PPM High PPM StdDev *Reference 77 77 ZINC Tuber 16.0 64.0 1.87 Bonness, M. S., Promising new drugs from plants: poisons that heal, Herbarist, #56, 1990, 59-68 *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.